document.addEventListener("alpine:init", () => {
  //TODO
  // - preserve playlist order (sort)
  // - "play/resume playlist" button (pick up where you left off)
  //   X track timestamp to truly resume where you left off
  // - periodically remove watched videos
  //   - or move to an "old" category, and add a screen to see the list
  // - consider separating context menu items (rather than having a sub-menu)
  // - view playback history (?)
  // - include currently open tabs in export
  // - support playlist management (add, remove, rename playlists)
  // - support input text box for adding to playlist (how to handle title?)
  // - option (probably a button) to add current page (url, title) to playlist
  // - button to add channel to youtube page (copy gql mutation to clipboard) (like the automa version)
  // - long-term: replace youtube page? rss feeds? need server?
  // - add personal rating feature ("enjoyed", "this was important", etc)
  Alpine.data("playlistManager", () => ({
    playlists: {},
    currentIndices: {},

    init() {
      this.loadPlaylists();
    },

    async loadPlaylists() {
      try {
        const result = await browser.storage.local.get("playlists");
        console.log("LOAD RESULT", result.playlists);
        this.playlists = result.playlists || {};
        if (result.playlists) {
          this.currentIndices = Object.keys(result.playlists).reduce(
            (acc, pln) => {
              const ind = result.playlists[pln].findIndex(
                (v) => v.status !== "done",
              );
              if (ind === -1) {
                acc[pln] = result.playlists[pln].length;
              } else {
                acc[pln] = ind;
              }
              return acc;
            },
            {},
          );
        } else {
          this.currentIndices = {};
        }
      } catch (error) {
        console.error("Error loading playlists:", error);
      }
    },

    formatPlaylistName(name) {
      // Convert "listening-1" to "Listening - 1"
      return name
        .split("-")
        .map((part) => part.charAt(0).toUpperCase() + part.slice(1))
        .join(" - ");
    },

    openVideo(url) {
      browser.tabs.create({ url });
    },

    async removeVideo(playlistName, index) {
      const playlists = JSON.parse(JSON.stringify(this.playlists));

      // Make a copy of the current playlist
      const playlist = [...playlists[playlistName]];

      // Remove the video at the specified index
      playlist.splice(index, 1);

      // Create an updated playlists object with the remaining playlists unchanged
      const updatedPlaylists = {
        ...playlists,
        [playlistName]: playlist,
      };

      // Update the playlists in storage
      try {
        await browser.storage.local.set({ playlists: updatedPlaylists });
        this.playlists = updatedPlaylists;
      } catch (error) {
        console.error("Error removing video:", error);
      }
    },

    async moveVideoUp(playlistName, index) {
      // Can't move the first item up
      if (index <= 0) return;

      const playlists = JSON.parse(JSON.stringify(this.playlists));

      // Make a copy of the current playlist
      const playlist = [...playlists[playlistName]];

      // Swap the video with the one above it
      [playlist[index], playlist[index - 1]] = [
        playlist[index - 1],
        playlist[index],
      ];

      // Create an updated playlists object
      const updatedPlaylists = {
        ...playlists,
        [playlistName]: playlist,
      };

      // Update the playlists in storage
      try {
        await browser.storage.local.set({ playlists: updatedPlaylists });
        this.playlists = updatedPlaylists;
      } catch (error) {
        console.error("Error moving video up:", error);
      }
    },

    async moveVideoDown(playlistName, index) {
      const playlists = JSON.parse(JSON.stringify(this.playlists));
      const playlist = [...playlists[playlistName]];

      // Can't move the last item down
      if (index >= playlist.length - 1) return;

      // Swap the video with the one below it
      [playlist[index], playlist[index + 1]] = [
        playlist[index + 1],
        playlist[index],
      ];

      // Create an updated playlists object
      const updatedPlaylists = {
        ...playlists,
        [playlistName]: playlist,
      };

      // Update the playlists in storage
      try {
        await browser.storage.local.set({ playlists: updatedPlaylists });
        this.playlists = updatedPlaylists;
      } catch (error) {
        console.error("Error moving video down:", error);
      }
    },

    async exportPlaylists() {
      try {
        // Get current playlists
        const playlistResult = await browser.storage.local.get("playlists");
        const playlists = playlistResult.playlists || {};

        // Get playback history
        const historyResult = await browser.storage.local.get("history");
        const playbackHistory = historyResult.history || {};

        // Create export data object
        const exportData = {
          playlists,
          playbackHistory,
          exportDate: new Date().toISOString(),
        };

        // Convert to JSON
        const jsonString = JSON.stringify(exportData, null, 2);

        // Create download
        const blob = new Blob([jsonString], { type: "application/json" });
        const url = URL.createObjectURL(blob);

        // Trigger download
        const a = document.createElement("a");
        a.href = url;
        a.download = `playlists-export-${new Date().toISOString().split("T")[0]}.json`;
        document.body.appendChild(a);
        a.click();

        // Clean up
        setTimeout(() => {
          document.body.removeChild(a);
          URL.revokeObjectURL(url);
        }, 100);
      } catch (error) {
        console.error("Error exporting playlists:", error);
      }
    },

    videotitle: {
      ["@click"]() {
        console.log("TITLE CLICK", this.$el);
      },
    },

    videoPlayLink: {
      ["@click.prevent"]() {
        browser.tabs.update({ url: this.$el.href });
      },
    },

    isCurrentVideo(playlistName, index) {
      const currentIndex = this.currentIndices[playlistName];
      return currentIndex === index;
    },

    isDoneVideo(playlistName, index) {
      const currentIndex = this.currentIndices[playlistName];
      return index < currentIndex;
    },

    videoItemClass: {
      [":class"]() {
        const playlistName = this.$el.dataset.playlistName;
        const index = parseInt(this.$el.dataset.playlistIndex);
        const video = this.playlists[playlistName][index];

        return {
          "current-video": this.isCurrentVideo(playlistName, index),
          "done-video":
            this.isDoneVideo(playlistName, index) && video.status === "done",
        };
      },
    },

    removeVideoButton: {
      ["@click"]() {
        this.removeVideo(
          this.$el.dataset.playlistName,
          this.$el.dataset.playlistIndex,
        );
      },
    },

    moveUpButton: {
      ["@click"]() {
        this.moveVideoUp(
          this.$el.dataset.playlistName,
          parseInt(this.$el.dataset.playlistIndex),
        );
      },
      [":disabled"]() {
        return parseInt(this.$el.dataset.playlistIndex) === 0;
      },
    },

    moveDownButton: {
      ["@click"]() {
        this.moveVideoDown(
          this.$el.dataset.playlistName,
          parseInt(this.$el.dataset.playlistIndex),
        );
      },
      [":disabled"]() {
        return (
          parseInt(this.$el.dataset.playlistIndex) ===
          this.playlists[this.$el.dataset.playlistName].length - 1
        );
      },
    },

    exportButton: {
      ["@click"]() {
        this.exportPlaylists();
      },
    },

    importButton: {
      ["@click"]() {
        document.getElementById("import-file-input").click();
      },
    },

    importFile(event) {
      const file = event.target.files[0];
      if (!file) return;

      const reader = new FileReader();
      reader.onload = (e) => {
        try {
          const importedData = JSON.parse(e.target.result);
          this.validateAndImportPlaylists(importedData);
        } catch (error) {
          console.error("Error parsing JSON file:", error);
          alert(
            "Invalid JSON file. Please select a valid playlist export file.",
          );
        } finally {
          // Reset the file input so the same file can be selected again
          event.target.value = "";
        }
      };

      reader.readAsText(file);
    },

    validateAndImportPlaylists(data) {
      // Validate the playlists structure
      if (!data.playlists || typeof data.playlists !== "object") {
        alert("Invalid file format: Missing or invalid 'playlists' property");
        return;
      }

      // Validate each playlist
      const validPlaylists = {};
      let hasErrors = false;

      for (const [playlistName, videos] of Object.entries(data.playlists)) {
        // Check if videos is an array
        if (!Array.isArray(videos)) {
          console.error(
            `Playlist '${playlistName}' does not contain a valid array of videos`,
          );
          hasErrors = true;
          continue;
        }

        // Validate each video in the playlist
        const validVideos = videos.filter((video) => {
          if (!video || typeof video !== "object") {
            console.error(`Invalid video object in '${playlistName}'`);
            return false;
          }

          if (
            !video.url ||
            typeof video.url !== "string" ||
            !video.title ||
            typeof video.title !== "string"
          ) {
            console.error(
              `Video in '${playlistName}' missing required properties (url, title)`,
            );
            return false;
          }

          return true;
        });

        // Add the validated playlist if it has valid videos
        if (validVideos.length > 0) {
          validPlaylists[playlistName] = validVideos;
        }
      }

      if (Object.keys(validPlaylists).length === 0) {
        alert("No valid playlists found in the import file");
        return;
      }

      if (hasErrors) {
        const confirmImport = confirm(
          "Some playlists or videos were invalid and will be skipped. Do you want to continue with the import?",
        );
        if (!confirmImport) return;
      }

      // Update storage and state
      this.updatePlaylists(validPlaylists);
    },

    async updatePlaylists(playlists) {
      try {
        await browser.storage.local.set({ playlists });
        this.playlists = playlists;
        alert("Playlists imported successfully!");
      } catch (error) {
        console.error("Error updating playlists:", error);
        alert("Error importing playlists: " + error.message);
      }
    },
  }));
});