import {
  buildToolScript,
  escapeForExtendScript,
} from "../bridge/script-builder.js";
import { sendCommand, BridgeOptions } from "../bridge/file-bridge.js";

export function getUtilityTools(bridgeOptions: BridgeOptions) {
  return {
    delete_project_item: {
      description:
        "Delete a project item (clip, bin, etc.) from the project panel. This removes it from the project but does not affect timeline instances.",
      parameters: {
        type: "object" as const,
        properties: {
          item_id: {
            type: "string",
            description: "Node ID or name of the project item to delete",
          },
        },
        required: ["item_id"],
      },
      handler: async (args: { item_id: string }) => {
        const script = buildToolScript(`
          var item = __findProjectItem("${escapeForExtendScript(args.item_id)}");
          if (!item) return __error("Item not found: ${escapeForExtendScript(args.item_id)}");
          if (item === app.project.rootItem) return __error("The project root cannot be deleted");

          var nodeId = String(item.nodeId);
          var name = item.name;
          var sequence = null;
          for (var i = 0; i < app.project.sequences.numSequences; i++) {
            var candidate = app.project.sequences[i];
            try {
              if (candidate.projectItem && String(candidate.projectItem.nodeId) === nodeId) {
                sequence = candidate;
                break;
              }
            } catch (e) {}
          }

          if (item.type === 2) {
            item.deleteBin();
          } else if (sequence) {
            var accepted = app.project.deleteSequence(sequence);
            if (accepted === false) return __error("Premiere rejected deletion of sequence: " + name);
          } else {
            return __error(
              "Legacy CEP cannot safely delete this project item type through a documented API. " +
              "No deletion was attempted; use organize_project_items_uxp with action 'remove' when the authenticated UXP bridge is connected, or remove it in Premiere's Project panel."
            );
          }

          if (__findProjectItem(nodeId)) {
            return __error("Premiere did not remove project item: " + name + ". The deletion is not reported as successful.");
          }
          return __result({ deleted: true, verified: true, name: name, nodeId: nodeId });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    delete_multiple_project_items: {
      description:
        "Delete multiple project items at once from the project panel.",
      parameters: {
        type: "object" as const,
        properties: {
          item_ids: {
            type: "array",
            items: { type: "string" },
            description: "Array of node IDs or names of items to delete",
          },
        },
        required: ["item_ids"],
      },
      handler: async (args: { item_ids: string[] }) => {
        const idsJson = JSON.stringify(args.item_ids);
        const script = buildToolScript(`
          var ids = ${idsJson};
          var planned = [];
          for (var i = 0; i < ids.length; i++) {
            var item = __findProjectItem(ids[i]);
            if (!item) return __error("Item not found: " + ids[i] + ". No project items were deleted.");
            if (item === app.project.rootItem) return __error("The project root cannot be deleted. No project items were deleted.");
            var sequence = null;
            for (var s = 0; s < app.project.sequences.numSequences; s++) {
              var candidate = app.project.sequences[s];
              try {
                if (candidate.projectItem && String(candidate.projectItem.nodeId) === String(item.nodeId)) {
                  sequence = candidate;
                  break;
                }
              } catch (e) {}
            }
            if (item.type !== 2 && !sequence) {
              return __error(
                "Legacy CEP cannot safely delete project item: " + item.name + ". " +
                "No project items were deleted; use organize_project_items_uxp with action 'remove' for generic project-item deletion."
              );
            }
            planned.push({ nodeId: String(item.nodeId), name: item.name, item: item, sequence: sequence });
          }
          for (var p = 0; p < planned.length; p++) {
            var target = planned[p];
            // A selected child can already be gone after its selected parent bin is
            // deleted; that still satisfies the requested postcondition.
            if (!__findProjectItem(target.nodeId)) continue;
            if (target.item.type === 2) {
              target.item.deleteBin();
            } else {
              var accepted = app.project.deleteSequence(target.sequence);
              if (accepted === false) return __error("Premiere rejected deletion of sequence: " + target.name);
            }
          }
          var deleted = [];
          for (var q = 0; q < planned.length; q++) {
            if (__findProjectItem(planned[q].nodeId)) {
              return __error("Premiere did not remove project item: " + planned[q].name + ". The batch is not reported as successful.");
            }
            deleted.push({ nodeId: planned[q].nodeId, name: planned[q].name });
          }
          return __result({ deleted: deleted.length, total: ids.length, items: deleted, verified: true });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    rename_project_item: {
      description: "Rename a project item in the project panel.",
      parameters: {
        type: "object" as const,
        properties: {
          item_id: {
            type: "string",
            description: "Node ID or name of the project item",
          },
          new_name: {
            type: "string",
            description: "New name for the item",
          },
        },
        required: ["item_id", "new_name"],
      },
      handler: async (args: { item_id: string; new_name: string }) => {
        const script = buildToolScript(`
          var item = __findProjectItem("${escapeForExtendScript(args.item_id)}");
          if (!item) return __error("Item not found");

          var oldName = item.name;
          var sequence = null;
          try {
            if (item.isSequence && item.isSequence()) {
              for (var i = 0; i < app.project.sequences.numSequences; i++) {
                var candidate = app.project.sequences[i];
                if (candidate.projectItem && candidate.projectItem.nodeId === item.nodeId) {
                  sequence = candidate;
                  break;
                }
              }
              if (!sequence) return __error("The sequence project item could not be matched to a live sequence; no rename was attempted");
            }
          } catch (e) {
            return __error("Could not inspect the project item before rename: " + e.toString());
          }
          item.name = "${escapeForExtendScript(args.new_name)}";
          if (sequence) sequence.name = "${escapeForExtendScript(args.new_name)}";
          if (item.name !== "${escapeForExtendScript(args.new_name)}" ||
              (sequence && sequence.name !== "${escapeForExtendScript(args.new_name)}")) {
            return __error("Premiere did not apply the requested name to every sequence representation");
          }
          return __result({ oldName: oldName, newName: item.name, sequenceVerified: sequence ? true : undefined });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    add_adjustment_layer: {
      description:
        "Add an adjustment layer to the active sequence via QE DOM. The layer is added at the playhead position on the specified track.",
      parameters: {
        type: "object" as const,
        properties: {
          track_index: {
            type: "number",
            description: "Video track index (default: 0)",
          },
        },
      },
      handler: async (args: { track_index?: number }) => {
        const track = args.track_index ?? 0;
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          app.enableQE();
          var qeSeq = qe.project.getActiveSequence();
          if (!qeSeq) return __error("No active QE sequence");

          // Path 1 (legacy, removed in PPro 2026): qeSeq.addAdjustmentLayer(track)
          try {
            if (qeSeq.addAdjustmentLayer) {
              qeSeq.addAdjustmentLayer(${track});
              return __result({ added: true, trackIndex: ${track}, method: "qeSeq.addAdjustmentLayer" });
            }
          } catch(eLegacy) {}

          // Path 2 (PPro 2026): create a project-level adjustment layer matching
          // the active sequence, then insert into the requested track at the
          // playhead. qe.project.newAdjustmentLayer() returns a QE project item.
          try {
            var adjQE = qe.project.newAdjustmentLayer ? qe.project.newAdjustmentLayer() : null;
            if (adjQE) {
              // Find the matching public ProjectItem to insert.
              var rootChildren = app.project.rootItem.children;
              var adjItem = null;
              for (var c = rootChildren.numItems - 1; c >= 0; c--) {
                var it = rootChildren[c];
                if (it && it.name && it.name.toLowerCase().indexOf("adjustment") !== -1) {
                  adjItem = it;
                  break;
                }
              }
              if (!adjItem) return __error("Adjustment layer item not found in project after creation");

              var qeTrack = qeSeq.getVideoTrackAt(${track});
              if (!qeTrack) return __error("Video track " + ${track} + " not found");

              var playerTicks;
              try { playerTicks = seq.getPlayerPosition().ticks.toString(); }
              catch(eP) { playerTicks = "0"; }

              try {
                qeTrack.insert(adjItem, playerTicks);
              } catch(eIns1) {
                // Older signature: qeTrack.insertClip(item, ticks)
                try { qeTrack.insertClip(adjItem, playerTicks); }
                catch(eIns2) { return __error("Failed to insert adjustment layer: " + eIns2.toString()); }
              }
              return __result({ added: true, trackIndex: ${track}, method: "qe.project.newAdjustmentLayer + insert" });
            }
          } catch(eNew) {
            return __error("Failed to create adjustment layer: " + eNew.toString());
          }

          return __error("No supported adjustment-layer API found in this Premiere version");
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    freeze_frame: {
      description:
        "Create a freeze frame from a clip at a specific time. Exports the frame and imports it back as a still image.",
      parameters: {
        type: "object" as const,
        properties: {
          time_seconds: {
            type: "number",
            description:
              "Time in the sequence to freeze (in seconds). Uses playhead if omitted.",
          },
          output_path: {
            type: "string",
            description:
              "Full path for the exported frame (e.g., /path/to/freeze.png)",
          },
          duration_seconds: {
            type: "number",
            description:
              "Duration of the freeze frame on the timeline (default: 2)",
          },
        },
        required: ["output_path"],
      },
      handler: async (args: {
        time_seconds?: number;
        output_path: string;
        duration_seconds?: number;
      }) => {
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          ${
            args.time_seconds !== undefined
              ? `var timeTicks = __secondsToTicks(${args.time_seconds}).toString();`
              : `var timeTicks = seq.getPlayerPosition().ticks;`
          }

          var res = __exportStillFrame("${escapeForExtendScript(args.output_path)}", timeTicks);
          if (!res.ok) return __error(res.error + " [" + res.notes.join("; ") + "]");

          // Import back
          app.project.importFiles([res.path], false, app.project.rootItem, false);

          return __result({
            exported: true,
            path: res.path,
            method: res.method,
            atSeconds: __ticksToSeconds(timeTicks),
            note: "Frame exported and imported. Add to timeline with add_to_timeline."
          });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    set_sequence_frame_rate: {
      description: "Change the frame rate of the active sequence.",
      parameters: {
        type: "object" as const,
        properties: {
          frame_rate: {
            type: "number",
            minimum: 1,
            maximum: 240,
            description:
              "New frame rate (e.g., 23.976, 24, 25, 29.97, 30, 50, 59.94, 60)",
          },
        },
        required: ["frame_rate"],
      },
      handler: async (args: { frame_rate: number }) => {
        if (!Number.isFinite(args.frame_rate) || args.frame_rate < 1 || args.frame_rate > 240) {
          return {
            success: false,
            error: "frame_rate must be a finite value between 1 and 240 fps",
          };
        }
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var settings = seq.getSettings();
          if (!settings) return __error("Could not get sequence settings");

          var requestedFps = ${args.frame_rate};
          var requestedTicks = Math.round(TICKS_PER_SECOND / requestedFps);
          var frameDuration = new Time();
          frameDuration.ticks = requestedTicks.toString();
          settings.videoFrameRate = frameDuration;
          seq.setSettings(settings);

          var applied = seq.getSettings();
          if (!applied || !applied.videoFrameRate) {
            return __error("Premiere did not return the updated sequence frame rate");
          }
          var appliedTicks = parseFloat(applied.videoFrameRate.ticks);
          if (!isFinite(appliedTicks) || Math.abs(appliedTicks - requestedTicks) > 1) {
            return __error(
              "Premiere did not apply the requested frame rate: expected " +
              requestedTicks + " ticks/frame, got " + appliedTicks
            );
          }

          return __result({
            frameRate: requestedFps,
            ticksPerFrame: requestedTicks.toString(),
            sequence: seq.name
          });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    set_sequence_resolution: {
      description: "Change the resolution (frame size) of the active sequence.",
      parameters: {
        type: "object" as const,
        properties: {
          width: {
            type: "number",
            description: "Width in pixels",
          },
          height: {
            type: "number",
            description: "Height in pixels",
          },
        },
        required: ["width", "height"],
      },
      handler: async (args: { width: number; height: number }) => {
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var settings = seq.getSettings();
          if (!settings) return __error("Could not get sequence settings");

          settings.videoFrameWidth = ${args.width};
          settings.videoFrameHeight = ${args.height};
          seq.setSettings(settings);

          return __result({ width: ${args.width}, height: ${args.height}, sequence: seq.name });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    set_sequence_audio_settings: {
      description:
        "Change audio settings of the active sequence (sample rate, channel type).",
      parameters: {
        type: "object" as const,
        properties: {
          sample_rate: {
            type: "number",
            description: "Audio sample rate (e.g., 44100, 48000, 96000)",
          },
          channel_type: {
            type: "number",
            description:
              "Channel type: 0=Mono, 1=Stereo, 2=5.1, 3=Multichannel",
          },
        },
      },
      handler: async (args: {
        sample_rate?: number;
        channel_type?: number;
      }) => {
        if (args.sample_rate !== undefined &&
          (!Number.isFinite(args.sample_rate) || args.sample_rate < 1 || args.sample_rate > 768000)) {
          return {
            success: false,
            error: "sample_rate must be a finite value between 1 and 768000 Hz",
          };
        }
        if (args.channel_type !== undefined &&
          (!Number.isInteger(args.channel_type) || args.channel_type < 0 || args.channel_type > 5)) {
          return {
            success: false,
            error: "channel_type must be an integer from 0 to 5",
          };
        }
        if (args.sample_rate === undefined && args.channel_type === undefined) {
          return {
            success: false,
            error: "Provide sample_rate and/or channel_type.",
          };
        }
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var settings = seq.getSettings();
          if (!settings) return __error("Could not get sequence settings");

          ${args.sample_rate !== undefined ? `
          var requestedSampleRate = ${args.sample_rate};
          var requestedTicksPerSample = Math.round(TICKS_PER_SECOND / requestedSampleRate);
          var sampleDuration = new Time();
          sampleDuration.ticks = requestedTicksPerSample.toString();
          settings.audioSampleRate = sampleDuration;` : ""}
          ${args.channel_type !== undefined ? `settings.audioChannelType = ${args.channel_type};` : ""}
          seq.setSettings(settings);

          var applied = seq.getSettings();
          if (!applied) return __error("Premiere did not return updated sequence settings");
          ${args.sample_rate !== undefined ? `
          if (!applied.audioSampleRate) return __error("Premiere did not return the updated audio sample rate");
          var appliedTicksPerSample = parseFloat(applied.audioSampleRate.ticks);
          if (!isFinite(appliedTicksPerSample) || Math.abs(appliedTicksPerSample - requestedTicksPerSample) > 1) {
            return __error(
              "Premiere did not apply the requested audio sample rate: expected " +
              requestedTicksPerSample + " ticks/sample, got " + appliedTicksPerSample
            );
          }` : ""}
          ${args.channel_type !== undefined ? `
          if (applied.audioChannelType !== ${args.channel_type}) {
            return __error("Premiere did not apply the requested audio channel type");
          }` : ""}
          return __result({
            sequence: seq.name,
            ${args.sample_rate !== undefined ? `sampleRate: requestedSampleRate, ticksPerSample: requestedTicksPerSample.toString(),` : ""}
            ${args.channel_type !== undefined ? `channelType: applied.audioChannelType,` : ""}
            verified: true
          });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    set_sequence_pixel_aspect_ratio: {
      description:
        "Change the pixel aspect ratio of the active sequence, or return a capability error when the legacy host does not expose a writable setting.",
      parameters: {
        type: "object" as const,
        properties: {
          ratio: {
            type: "string",
            description:
              "Pixel aspect ratio string (for example '1.0' for square pixels or '1.4222' for 16:9 DV).",
          },
        },
        required: ["ratio"],
      },
      handler: async (args: { ratio: string }) => {
        if (typeof args.ratio !== "string") {
          return { success: false, error: "ratio must be a positive decimal string such as '1.0' or '1.4222'." };
        }
        const ratio = args.ratio.trim();
        if (!/^(?:0|[1-9]\d*)(?:\.\d+)?$/.test(ratio) || Number(ratio) <= 0) {
          return { success: false, error: "ratio must be a positive decimal string such as '1.0' or '1.4222'." };
        }
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var settings = seq.getSettings();
          if (!settings) return __error("Could not get sequence settings");

          var requestedRatio = "${ratio}";
          var currentRatio;
          try {
            currentRatio = settings.videoPixelAspectRatio;
          } catch (eRead) {
            return __error("This Premiere host does not expose a readable sequence pixel-aspect-ratio setting: " + eRead.toString());
          }
          if (typeof currentRatio === "undefined") {
            return __error("This Premiere host does not expose a writable sequence pixel-aspect-ratio setting. No sequence settings were changed.");
          }

          try {
            settings.videoPixelAspectRatio = requestedRatio;
          } catch (eAssign) {
            return __error("This Premiere host rejected the sequence pixel-aspect-ratio update. No sequence settings were changed: " + eAssign.toString());
          }
          var settingsApplied;
          try {
            settingsApplied = seq.setSettings(settings);
          } catch (eSet) {
            return __error("Premiere could not apply the sequence pixel-aspect-ratio update: " + eSet.toString());
          }
          if (settingsApplied === false) {
            return __error("Premiere rejected the sequence pixel-aspect-ratio update. No sequence settings were changed.");
          }

          var observed;
          try {
            observed = seq.getSettings();
          } catch (eVerify) {
            return __error("Premiere could not read back the sequence pixel-aspect-ratio update: " + eVerify.toString());
          }
          if (!observed) return __error("Premiere did not return sequence settings after the pixel-aspect-ratio update");

          var observedRatio;
          try {
            observedRatio = String(observed.videoPixelAspectRatio);
          } catch (eObserved) {
            return __error("Premiere did not expose the applied sequence pixel-aspect ratio for verification: " + eObserved.toString());
          }
          if (observedRatio !== requestedRatio) {
            return __error("Premiere did not apply the requested sequence pixel aspect ratio.");
          }

          return __result({ ratio: requestedRatio, sequence: seq.name, verified: true });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    set_sequence_field_type: {
      description: "Set the field order of the active sequence.",
      parameters: {
        type: "object" as const,
        properties: {
          field_type: {
            type: "number",
            description:
              "0=No Fields (Progressive), 1=Upper Field First, 2=Lower Field First",
          },
        },
        required: ["field_type"],
      },
      handler: async (args: { field_type: number }) => {
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var settings = seq.getSettings();
          if (!settings) return __error("Could not get sequence settings");

          settings.videoFieldType = ${args.field_type};
          seq.setSettings(settings);

          return __result({ fieldType: ${args.field_type}, sequence: seq.name });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_all_project_paths: {
      description:
        "Get all unique media file paths used in the project. Useful for asset management and archiving.",
      parameters: {},
      handler: async () => {
        const script = buildToolScript(`
          var paths = {};
          function scan(bin) {
            for (var i = 0; i < bin.children.numItems; i++) {
              var item = bin.children[i];
              try {
                var mp = item.getMediaPath();
                if (mp && !paths[mp]) {
                  paths[mp] = {
                    path: mp,
                    name: item.name,
                    nodeId: item.nodeId,
                    offline: false
                  };
                  try { paths[mp].offline = item.isOffline(); } catch(e) {}
                }
              } catch(e) {}
              if (item.type === 2) scan(item);
            }
          }
          scan(app.project.rootItem);

          var result = [];
          for (var key in paths) {
            if (paths.hasOwnProperty(key)) result.push(paths[key]);
          }
          return __result({ pathCount: result.length, paths: result });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_unused_media: {
      description:
        "Find all project items that are NOT used in any sequence. Useful for cleaning up projects.",
      parameters: {},
      handler: async () => {
        const script = buildToolScript(`
          // First, collect all project item nodeIds used in any sequence
          var usedIds = {};
          for (var s = 0; s < app.project.sequences.numSequences; s++) {
            var seq = app.project.sequences[s];
            function scanTracks(tracks) {
              for (var t = 0; t < tracks.numTracks; t++) {
                for (var c = 0; c < tracks[t].clips.numItems; c++) {
                  try {
                    var src = tracks[t].clips[c].projectItem;
                    if (src) usedIds[src.nodeId] = true;
                  } catch(e) {}
                }
              }
            }
            scanTracks(seq.videoTracks);
            scanTracks(seq.audioTracks);
          }

          // Then find items not in usedIds
          var unused = [];
          function findUnused(bin) {
            for (var i = 0; i < bin.children.numItems; i++) {
              var item = bin.children[i];
              if (item.type === 1 || item.type === 4) { // clips and files
                if (!usedIds[item.nodeId]) {
                  var entry = {
                    nodeId: item.nodeId,
                    name: item.name,
                    treePath: item.treePath
                  };
                  try { entry.mediaPath = item.getMediaPath(); } catch(e) {}
                  unused.push(entry);
                }
              }
              if (item.type === 2) findUnused(item);
            }
          }
          findUnused(app.project.rootItem);

          return __result({ unusedCount: unused.length, items: unused });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_duplicate_media: {
      description:
        "Find project items that reference the same source media file. Useful for consolidation.",
      parameters: {},
      handler: async () => {
        const script = buildToolScript(`
          var pathMap = {};
          function scan(bin) {
            for (var i = 0; i < bin.children.numItems; i++) {
              var item = bin.children[i];
              try {
                var mp = item.getMediaPath();
                var nodeId = String(item.nodeId || "");
                // A project item can be exposed more than once while Premiere walks
                // bins. Only distinct, stable node IDs can establish a duplicate.
                if (mp && nodeId) {
                  if (!pathMap[mp]) pathMap[mp] = { items: [], nodeIds: {} };
                  if (!pathMap[mp].nodeIds[nodeId]) {
                    pathMap[mp].nodeIds[nodeId] = true;
                    pathMap[mp].items.push({ nodeId: nodeId, name: item.name, treePath: item.treePath });
                  }
                }
              } catch(e) {}
              if (item.type === 2) scan(item);
            }
          }
          scan(app.project.rootItem);

          var duplicates = [];
          for (var path in pathMap) {
            if (pathMap.hasOwnProperty(path) && pathMap[path].items.length > 1) {
              duplicates.push({ mediaPath: path, count: pathMap[path].items.length, items: pathMap[path].items });
            }
          }

          return __result({ duplicateGroupCount: duplicates.length, duplicates: duplicates });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    lift_selection: {
      description:
        "Lift (remove without closing gap) the content between sequence in/out points or selected clips.",
      parameters: {},
      handler: async () => {
        const script = buildToolScript(`
          app.enableQE();
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          try {
            var qeSeq = qe.project.getActiveSequence();
            qeSeq.lift();
            return __result({ lifted: true });
          } catch(e) {
            return __error("Lift failed: " + e.message);
          }
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    extract_selection: {
      description:
        "Extract (remove and close gap) the content between sequence in/out points.",
      parameters: {},
      handler: async () => {
        const script = buildToolScript(`
          app.enableQE();
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          try {
            var qeSeq = qe.project.getActiveSequence();
            qeSeq.extract();
            return __result({ extracted: true });
          } catch(e) {
            return __error("Extract failed: " + e.message);
          }
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_clip_links: {
      description:
        "Get information about linked clips (audio/video linked together) for a given clip.",
      parameters: {
        type: "object" as const,
        properties: {
          node_id: {
            type: "string",
            description: "Node ID of the clip",
          },
        },
        required: ["node_id"],
      },
      handler: async (args: { node_id: string }) => {
        const script = buildToolScript(`
          var result = __findClip("${escapeForExtendScript(args.node_id)}");
          if (!result) return __error("Clip not found");

          var clip = result.clip;
          var info = {
            nodeId: clip.nodeId,
            name: clip.name,
            trackType: result.trackType,
            trackIndex: result.trackIndex
          };

          // Find linked clips by matching projectItem and overlapping time
          var linked = [];
          var seq = app.project.activeSequence;
          var clipStart = clip.start.ticks;
          var clipEnd = clip.end.ticks;
          var srcId = null;
          try { srcId = clip.projectItem ? clip.projectItem.nodeId : null; } catch(e) {}

          function findLinked(tracks, type) {
            for (var t = 0; t < tracks.numTracks; t++) {
              for (var c = 0; c < tracks[t].clips.numItems; c++) {
                var other = tracks[t].clips[c];
                if (other.nodeId === clip.nodeId) continue;
                // Check same source and overlapping time
                try {
                  var otherSrcId = other.projectItem ? other.projectItem.nodeId : null;
                  if (srcId && otherSrcId === srcId && other.start.ticks === clipStart) {
                    linked.push({
                      nodeId: other.nodeId,
                      name: other.name,
                      trackType: type,
                      trackIndex: t,
                      startSeconds: __ticksToSeconds(other.start.ticks),
                      endSeconds: __ticksToSeconds(other.end.ticks)
                    });
                  }
                } catch(e) {}
              }
            }
          }

          findLinked(seq.videoTracks, "video");
          findLinked(seq.audioTracks, "audio");

          info.linkedClips = linked;
          info.linkedCount = linked.length;

          return __result(info);
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_sequence_markers_by_type: {
      description:
        "Get all markers of a specific type (comment, chapter, web link, etc.) from a sequence.",
      parameters: {
        type: "object" as const,
        properties: {
          marker_type: {
            type: "string",
            enum: [
              "Comment",
              "Chapter",
              "Segmentation",
              "WebLink",
              "FlashCuePoint",
            ],
            description: "Type of marker to filter",
          },
          sequence_id: {
            type: "string",
            description:
              "Sequence name or ID. Uses active sequence if omitted.",
          },
        },
        required: ["marker_type"],
      },
      handler: async (args: { marker_type: string; sequence_id?: string }) => {
        const seqLookup = args.sequence_id
          ? `var seq = __findSequence("${escapeForExtendScript(args.sequence_id)}"); if (!seq) return __error("Sequence not found");`
          : `var seq = app.project.activeSequence; if (!seq) return __error("No active sequence");`;

        const script = buildToolScript(`
          ${seqLookup}

          var selectedSequence = { id: String(seq.sequenceID), name: String(seq.name || "") };
          var markerCollection = seq.markers;
          if (!markerCollection || typeof markerCollection.getFirstMarker !== "function" || typeof markerCollection.getNextMarker !== "function") {
            return __error("The requested sequence does not expose a readable marker collection");
          }
          var markers = [];
          var m = markerCollection.getFirstMarker();
          while (m) {
            if (m.type === "${escapeForExtendScript(args.marker_type)}") {
              markers.push({
                name: m.name,
                comments: m.comments,
                startSeconds: __ticksToSeconds(m.start.ticks),
                endSeconds: __ticksToSeconds(m.end.ticks),
                type: m.type
              });
            }
            m = markerCollection.getNextMarker(m);
          }

          return __result({ sequence: selectedSequence, type: "${escapeForExtendScript(args.marker_type)}", count: markers.length, markers: markers });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_clip_markers: {
      description:
        "Get all markers on a specific project item (source clip markers, not sequence markers).",
      parameters: {
        type: "object" as const,
        properties: {
          item_id: {
            type: "string",
            description: "Node ID or name of the project item",
          },
        },
        required: ["item_id"],
      },
      handler: async (args: { item_id: string }) => {
        const script = buildToolScript(`
          var item = __findProjectItem("${escapeForExtendScript(args.item_id)}");
          if (!item) return __error("Item not found");

          var markers = [];
          try {
            var m = item.getMarkers().getFirstMarker();
            while (m) {
              var mi = {
                name: m.name,
                comments: m.comments,
                startSeconds: __ticksToSeconds(m.start.ticks),
                type: m.type
              };
              try { mi.endSeconds = __ticksToSeconds(m.end.ticks); } catch(e) {}
              try { mi.colorIndex = m.getColorByIndex(); } catch(e) {}
              markers.push(mi);
              m = item.getMarkers().getNextMarker(m);
            }
          } catch(e) {}

          return __result({ item: item.name, markerCount: markers.length, markers: markers });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    add_marker_to_project_item: {
      description: "Add a marker to a project item (source clip marker).",
      parameters: {
        type: "object" as const,
        properties: {
          item_id: {
            type: "string",
            description: "Node ID or name of the project item",
          },
          time_seconds: {
            type: "number",
            description: "Time in seconds for the marker",
          },
          name: {
            type: "string",
            description: "Marker name",
          },
          comments: {
            type: "string",
            description: "Marker comments",
          },
          duration_seconds: {
            type: "number",
            description:
              "Duration of the marker in seconds (0 for point marker)",
          },
          type: {
            type: "string",
            enum: ["Comment", "Chapter", "Segmentation", "WebLink"],
            description: "Marker type (default: Comment)",
          },
          color_index: {
            type: "number",
            description: "Color label index (0-7)",
          },
        },
        required: ["item_id", "time_seconds"],
      },
      handler: async (args: {
        item_id: string;
        time_seconds: number;
        name?: string;
        comments?: string;
        duration_seconds?: number;
        type?: string;
        color_index?: number;
      }) => {
        const script = buildToolScript(`
          var item = __findProjectItem("${escapeForExtendScript(args.item_id)}");
          if (!item) return __error("Item not found");

          var markers = item.getMarkers();
          var marker = markers.createMarker(${args.time_seconds});

          ${args.name ? `marker.name = "${escapeForExtendScript(args.name)}";` : ""}
          ${args.comments ? `marker.comments = "${escapeForExtendScript(args.comments)}";` : ""}
          ${args.type ? `marker.type = "${escapeForExtendScript(args.type)}";` : ""}
          ${
            args.duration_seconds !== undefined
              ? `
          var endTime = new Time();
          endTime.seconds = ${args.time_seconds + args.duration_seconds};
          marker.end = endTime;
          `
              : ""
          }
          ${args.color_index !== undefined ? `marker.setColorByIndex(${args.color_index});` : ""}

          return __result({ added: true, item: item.name, timeSeconds: ${args.time_seconds} });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    set_sequence_display_format: {
      description: "Set the timecode display format for the active sequence.",
      parameters: {
        type: "object" as const,
        properties: {
          video_display_format: {
            type: "number",
            description:
              "Video: 0=24 Timecode, 1=25 Timecode, 2=29.97 Drop-frame, 3=29.97 Non-drop-frame, 4=30 Timecode, 5=50 Timecode, 6=59.94 Drop-frame, 7=59.94 Non-drop-frame, 8=60 Timecode, 9=Frames, 10=Feet+Frames 16mm, 11=Feet+Frames 35mm",
          },
          audio_display_format: {
            type: "number",
            description: "Audio: 0=Audio Samples, 1=Milliseconds",
          },
        },
      },
      handler: async (args: {
        video_display_format?: number;
        audio_display_format?: number;
      }) => {
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var settings = seq.getSettings();
          if (!settings) return __error("Could not get sequence settings");

          ${args.video_display_format !== undefined ? `settings.videoDisplayFormat = ${args.video_display_format};` : ""}
          ${args.audio_display_format !== undefined ? `settings.audioDisplayFormat = ${args.audio_display_format};` : ""}
          seq.setSettings(settings);

          return __result({ sequence: seq.name, videoDisplayFormat: settings.videoDisplayFormat, audioDisplayFormat: settings.audioDisplayFormat });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_clip_at_playhead: {
      description:
        "Get all clips at the current playhead position across all tracks.",
      parameters: {
        type: "object" as const,
        properties: {
          track_type: {
            type: "string",
            enum: ["video", "audio", "both"],
            description: "Track type to check (default: both)",
          },
        },
      },
      handler: async (args: { track_type?: string }) => {
        const trackType = args.track_type || "both";
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var posTicks = parseFloat(seq.getPlayerPosition().ticks);
          var clips = [];

          function findAtPlayhead(tracks, type) {
            for (var t = 0; t < tracks.numTracks; t++) {
              for (var c = 0; c < tracks[t].clips.numItems; c++) {
                var clip = tracks[t].clips[c];
                var cs = parseFloat(clip.start.ticks);
                var ce = parseFloat(clip.end.ticks);
                if (cs <= posTicks && ce > posTicks) {
                  var ci = {
                    nodeId: clip.nodeId,
                    name: clip.name,
                    trackType: type,
                    trackIndex: t,
                    trackName: tracks[t].name,
                    clipIndex: c,
                    startSeconds: __ticksToSeconds(clip.start.ticks),
                    endSeconds: __ticksToSeconds(clip.end.ticks)
                  };
                  try { ci.enabled = !clip.isDisabled(); } catch(e) { ci.enabled = true; }
                  clips.push(ci);
                }
              }
            }
          }

          if ("${trackType}" !== "audio") findAtPlayhead(seq.videoTracks, "video");
          if ("${trackType}" !== "video") findAtPlayhead(seq.audioTracks, "audio");

          return __result({
            playheadSeconds: __ticksToSeconds(seq.getPlayerPosition().ticks),
            clipCount: clips.length,
            clips: clips
          });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_next_edit_point: {
      description:
        "Find the next or previous edit point (clip boundary) from the playhead position.",
      parameters: {
        type: "object" as const,
        properties: {
          direction: {
            type: "string",
            enum: ["next", "previous"],
            description: "Direction to search (default: next)",
          },
          track_type: {
            type: "string",
            enum: ["video", "audio", "both"],
            description: "Track type to check (default: both)",
          },
        },
      },
      handler: async (args: { direction?: string; track_type?: string }) => {
        const direction = args.direction || "next";
        const trackType = args.track_type || "both";
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var posTicks = parseFloat(seq.getPlayerPosition().ticks);
          var editPoints = [];

          function collectPoints(tracks, type) {
            for (var t = 0; t < tracks.numTracks; t++) {
              for (var c = 0; c < tracks[t].clips.numItems; c++) {
                var clip = tracks[t].clips[c];
                editPoints.push(parseFloat(clip.start.ticks));
                editPoints.push(parseFloat(clip.end.ticks));
              }
            }
          }

          if ("${trackType}" !== "audio") collectPoints(seq.videoTracks, "video");
          if ("${trackType}" !== "video") collectPoints(seq.audioTracks, "audio");

          // Sort and deduplicate
          editPoints.sort(function(a, b) { return a - b; });
          var unique = [];
          for (var i = 0; i < editPoints.length; i++) {
            if (unique.length === 0 || editPoints[i] !== unique[unique.length - 1]) {
              unique.push(editPoints[i]);
            }
          }

          var found = null;
          if ("${direction}" === "next") {
            for (var i = 0; i < unique.length; i++) {
              if (unique[i] > posTicks + 1) { found = unique[i]; break; }
            }
          } else {
            for (var i = unique.length - 1; i >= 0; i--) {
              if (unique[i] < posTicks - 1) { found = unique[i]; break; }
            }
          }

          if (found === null) return __result({ found: false, direction: "${direction}" });

          return __result({
            found: true,
            direction: "${direction}",
            editPointSeconds: __ticksToSeconds("" + found),
            playheadSeconds: __ticksToSeconds("" + posTicks)
          });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    move_playhead_to_edit: {
      description: "Move the playhead to the next or previous edit point.",
      parameters: {
        type: "object" as const,
        properties: {
          direction: {
            type: "string",
            enum: ["next", "previous"],
            description: "Direction (default: next)",
          },
        },
      },
      handler: async (args: { direction?: string }) => {
        const direction = args.direction || "next";
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var posTicks = parseFloat(seq.getPlayerPosition().ticks);
          var editPoints = [];

          function collectPoints(tracks) {
            for (var t = 0; t < tracks.numTracks; t++) {
              for (var c = 0; c < tracks[t].clips.numItems; c++) {
                editPoints.push(parseFloat(tracks[t].clips[c].start.ticks));
                editPoints.push(parseFloat(tracks[t].clips[c].end.ticks));
              }
            }
          }

          collectPoints(seq.videoTracks);
          collectPoints(seq.audioTracks);

          editPoints.sort(function(a, b) { return a - b; });
          var unique = [];
          for (var i = 0; i < editPoints.length; i++) {
            if (unique.length === 0 || editPoints[i] !== unique[unique.length - 1]) unique.push(editPoints[i]);
          }

          var found = null;
          if ("${direction}" === "next") {
            for (var i = 0; i < unique.length; i++) {
              if (unique[i] > posTicks + 1) { found = unique[i]; break; }
            }
          } else {
            for (var i = unique.length - 1; i >= 0; i--) {
              if (unique[i] < posTicks - 1) { found = unique[i]; break; }
            }
          }

          if (found === null) return __error("No " + "${direction}" + " edit point found");

          seq.setPlayerPosition("" + found);

          return __result({ movedTo: __ticksToSeconds("" + found), direction: "${direction}" });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    set_project_scratch_disk: {
      description:
        "Set the project's scratch disk paths for captured video, audio, and previews.",
      parameters: {
        type: "object" as const,
        properties: {
          captured_video: {
            type: "string",
            description: "Path for captured video",
          },
          captured_audio: {
            type: "string",
            description: "Path for captured audio",
          },
          video_previews: {
            type: "string",
            description: "Path for video previews",
          },
          audio_previews: {
            type: "string",
            description: "Path for audio previews",
          },
        },
      },
      handler: async (args: {
        captured_video?: string;
        captured_audio?: string;
        video_previews?: string;
        audio_previews?: string;
      }) => {
        const script = buildToolScript(`
          var project = app.project;
          if (!project) return __error("No project open");

          var set = {};
          ${
            args.captured_video
              ? `
          try { project.setScratchDiskPath("${escapeForExtendScript(args.captured_video)}", 0); set.capturedVideo = "${escapeForExtendScript(args.captured_video)}"; } catch(e) {}`
              : ""
          }
          ${
            args.captured_audio
              ? `
          try { project.setScratchDiskPath("${escapeForExtendScript(args.captured_audio)}", 1); set.capturedAudio = "${escapeForExtendScript(args.captured_audio)}"; } catch(e) {}`
              : ""
          }
          ${
            args.video_previews
              ? `
          try { project.setScratchDiskPath("${escapeForExtendScript(args.video_previews)}", 2); set.videoPreviews = "${escapeForExtendScript(args.video_previews)}"; } catch(e) {}`
              : ""
          }
          ${
            args.audio_previews
              ? `
          try { project.setScratchDiskPath("${escapeForExtendScript(args.audio_previews)}", 3); set.audioPreviews = "${escapeForExtendScript(args.audio_previews)}"; } catch(e) {}`
              : ""
          }

          return __result(set);
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_project_scratch_disks: {
      description: "Get the current scratch disk paths for the project.",
      parameters: {},
      handler: async () => {
        const script = buildToolScript(`
          var project = app.project;
          if (!project) return __error("No project open");

          var disks = {};
          try { disks.capturedVideo = project.getScratchDiskPath(0); } catch(e) {}
          try { disks.capturedAudio = project.getScratchDiskPath(1); } catch(e) {}
          try { disks.videoPreviews = project.getScratchDiskPath(2); } catch(e) {}
          try { disks.audioPreviews = project.getScratchDiskPath(3); } catch(e) {}

          return __result(disks);
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    nest_clips: {
      description:
        "Unavailable on the legacy CEP backend: Premiere's documented createSubsequence API only creates a separate sequence and cannot safely replace the selected timeline clips with a nested-sequence reference.",
      parameters: {
        type: "object" as const,
        properties: {
          name: {
            type: "string",
            description: "Name for the nested sequence",
          },
        },
        required: ["name"],
      },
      handler: async (_args: { name: string }) => ({
        success: false,
        error:
          "nest_clips is unavailable on the legacy CEP backend because Premiere's documented createSubsequence API only creates a separate sequence and does not replace the original clips. No sequence was created and no timeline clips were changed; use Premiere's Nest command instead.",
      }),
    },

    get_sequence_count: {
      description: "Get the total number of sequences in the project.",
      parameters: {},
      handler: async () => {
        const script = buildToolScript(`
          var project = app.project;
          if (!project) return __error("No project open");
          return __result({ count: project.sequences.numSequences });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    get_total_clip_count: {
      description:
        "Get the total number of clips across all tracks in the active sequence.",
      parameters: {},
      handler: async () => {
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var video = 0, audio = 0;
          for (var t = 0; t < seq.videoTracks.numTracks; t++) video += seq.videoTracks[t].clips.numItems;
          for (var t = 0; t < seq.audioTracks.numTracks; t++) audio += seq.audioTracks[t].clips.numItems;

          return __result({ videoClips: video, audioClips: audio, total: video + audio });
        `);
        return sendCommand(script, bridgeOptions);
      },
    },

    match_frame: {
      description:
        "Get source media info for the frame at the current playhead on a specific track. Useful for match frame operations.",
      parameters: {
        type: "object" as const,
        properties: {
          track_type: {
            type: "string",
            enum: ["video", "audio"],
            description: "Track type (default: video)",
          },
          track_index: {
            type: "number",
            description: "Track index (default: 0)",
          },
        },
      },
      handler: async (args: { track_type?: string; track_index?: number }) => {
        const trackType = args.track_type || "video";
        const trackIndex = args.track_index ?? 0;
        const script = buildToolScript(`
          var seq = app.project.activeSequence;
          if (!seq) return __error("No active sequence");

          var tracks = ${trackType === "video" ? "seq.videoTracks" : "seq.audioTracks"};
          if (${trackIndex} >= tracks.numTracks) return __error("Track index out of range");

          var posTicks = parseFloat(seq.getPlayerPosition().ticks);
          var track = tracks[${trackIndex}];
          var found = null;

          for (var c = 0; c < track.clips.numItems; c++) {
            var clip = track.clips[c];
            if (parseFloat(clip.start.ticks) <= posTicks && parseFloat(clip.end.ticks) > posTicks) {
              found = clip;
              break;
            }
          }

          if (!found) return __error("No clip at playhead on ${trackType} track ${trackIndex}");

          var offsetTicks = posTicks - parseFloat(found.start.ticks) + parseFloat(found.inPoint.ticks);

          var result = {
            clipName: found.name,
            clipNodeId: found.nodeId,
            timelineSeconds: __ticksToSeconds("" + posTicks),
            sourceSeconds: __ticksToSeconds("" + offsetTicks)
          };

          try {
            var src = found.projectItem;
            if (src) {
              result.sourceNodeId = src.nodeId;
              result.sourceName = src.name;
              try { result.sourceMediaPath = src.getMediaPath(); } catch(e) {}
            }
          } catch(e) {}

          return __result(result);
        `);
        return sendCommand(script, bridgeOptions);
      },
    },
  };
}