const DEFAULT_WS_URL =
  localStorage.getItem("spotiqueueUrl") ?? "ws://localhost:8000/ws/spotify";
const DEFAULT_RECONNECT_MS = 1000;

class SpotiQueue {
  constructor(wsUrl = DEFAULT_WS_URL, reconnectMs = DEFAULT_RECONNECT_MS) {
    this.wsUrl = wsUrl;
    this.reconnectMs = reconnectMs;

    this.socket = null;
    this.reconnectInterval = null;
    this.closing = false;

    this.startedPlaying = false;
    this.button = null;

    this._onOpen = this._onOpen.bind(this);
    this._onMessage = this._onMessage.bind(this);
    this._onError = this._onError.bind(this);
    this._onClose = this._onClose.bind(this);
  }

  parseCommand(commandStr) {
    try {
      const parsed = JSON.parse(commandStr);

      if (
        typeof parsed === "object" &&
        parsed !== null &&
        typeof parsed.c === "string" &&
        (!("d" in parsed) || typeof parsed.d === "object")
      ) {
        return parsed;
      }
      return null;
    } catch {
      return null;
    }
  }

  connect() {
    console.log("[SpotiQueue] Trying to connect to server...");

    if (
      this.socket &&
      (this.socket.readyState === WebSocket.OPEN ||
        this.socket.readyState === WebSocket.CONNECTING)
    ) {
      return;
    }

    this.socket = new WebSocket(this.wsUrl);

    this.socket.addEventListener("open", this._onOpen);
    this.socket.addEventListener("message", this._onMessage);
    this.socket.addEventListener("error", this._onError);
    this.socket.addEventListener("close", this._onClose);
  }

  stop() {
    if (this.reconnectInterval) {
      clearInterval(this.reconnectInterval);
      this.reconnectInterval = null;
    }

    if (this.socket) {
      this.closing = true;
      try {
        this.socket.close();
      } catch (_e) {
        // empty
      }
      this.socket = null;
    }

    if (this.button) this.button.style.color = "#e22134";
    console.log("[SpotiQueue] Disconnecting from server, Bye!");
  }

  send(objOrString) {
    if (!this.socket || this.socket.readyState !== WebSocket.OPEN) return;
    const payload =
      typeof objOrString === "string"
        ? objOrString
        : JSON.stringify(objOrString);
    try {
      this.socket.send(payload);
    } catch (err) {
      console.error("[SpotiQueue] Failed to send:", err);
    }
  }

  _onOpen() {
    if (this.reconnectInterval) {
      clearInterval(this.reconnectInterval);
      this.reconnectInterval = null;
    }

    if (this.button) this.button.style.color = "#1DB954";
    console.log("[SpotiQueue] Connected to server!");
  }

  async _onMessage(event) {
    let data;
    try {
      data = JSON.parse(event.data);
    } catch {
      console.warn("[SpotiQueue] Received non-JSON message");
      return;
    }

    if (data.c === "ping") {
      this.send({ c: "pong" });
      return;
    }

    if (data.c === "next_song") {
      if (data.d && data.d.song) {
        try {
          Spicetify.Player.playUri(data.d.song);
          Spicetify.Player.setRepeat(false);
          this.startedPlaying = true;
          console.log("[SpotiQueue] New song received!");
        } catch (err) {
          console.error("[SpotiQueue] Error playing received song:", err);
        }
      } else {
        Spicetify.Player.play();
        this.startedPlaying = true;
      }
    }

    if (data.c === "search" && data.d && data.d.query && data.d.id) {
      const { query, id } = data.d;
      let songs = [];

      console.log("[SpotiQueue] Searching for", query);

      try {
        const { searchDesktop } = Spicetify.GraphQL.Definitions;
        const { data } = await Spicetify.GraphQL.Request(searchDesktop, {
          searchTerm: query,
          limit: 10,
          offset: 0,
          numberOfTopResults: 10,
          includeAudiobooks: false,
          includePreReleases: false,
          IncludeArtistHasConcertsField: false,
          includeAuthors: true,
        });

        songs = data.searchV2.tracksV2.items.reduce((o, c) => {
          const item = c.item.data;

          if (!item.playability.playable) return o;

          const album = item.albumOfTrack;
          o.push({
            name: item.name,
            uri: item.uri,
            artists: item.artists.items.map((v) => v.profile?.name),
            album: {
              name: album.name,
              coverUrl: album.coverArt.sources
                .sort((a, b) => b.height - a.height)
                .map((v) => v.url)[0],
            },
          });

          return o;
        }, []);
      } catch (e) {
        console.log("[SpotiQueue] Search error", e);
        // _
      }
      console.log("[SpotiQueue] Found", songs);

      this.send({
        c: "search",
        d: {
          id: id,
          results: songs,
        },
      });
    }
  }
  _onError(e) {
    try {
      console.log(e);
      if (this.socket) this.socket.close();
    } catch {
      // ignore
    }
  }

  _onClose() {
    console.log(
      "[SpotiQueue] closed connection",
      this.reconnectInterval,
      this.closing,
    );

    if (!this.reconnectInterval && !this.closing) {
      this.reconnectInterval = setInterval(
        () => this.connect(),
        this.reconnectMs,
      );
    }

    if (this.button && !this.closing) {
      this.button.style.color = "";
    }

    this.closing = false;
  }

  initUi() {
    const btn = new Spicetify.Topbar.Button("SpotiQueue", "enhance", () => {});

    this.button = btn.button;
    this.button.style.color = "#e22134";
    this.button.addEventListener("click", (e) => {
      console.log(e.pointerId);
      if (this.socket) {
        this.stop();
        return;
      }

      if (Spicetify.GraphQL.Definitions.searchDesktop === undefined) {
        Spicetify.Platform.History.push("/search/");
        setTimeout(() => {
          this.button.click();
          Spicetify.Platform.History.goBack();
        }, 200);
        return;
      }

      this.closing = false;
      this.button.style.color = "";
      this.connect();
    });
    this.button.addEventListener("contextmenu", (e) => {
      e.preventDefault();

      const div = document.createElement("div");
      div.innerHTML = `
        <div style="display: flex; flex-direction: row; gap: 0.5em;">
          <input style="flex-grow: 1; box-sizing: border-box; padding: 8px;">
          <button style="background: #1db954; color: #fff; border: none; margin: 0; padding: 0px 12px; border-radius: 6px"> Save </button>
        </div>
      `;
      Spicetify.PopupModal.display({ title: "WebSocket URL", content: div });

      div.querySelector("input").value = this.wsUrl
      div.querySelector("button").onclick = () => {
        const newUrl = div.querySelector("input").value.trim();
        if (!newUrl) return;

        localStorage.setItem("spotiqueueUrl", newUrl);
        this.wsUrl = newUrl;
        this.stop();
        Spicetify.PopupModal.hide();
        Spicetify.showNotification("Saved!");
      };
    });

    Spicetify.Player.addEventListener("songchange", (info) => {
      console.log(info);
      if (
        this.socket &&
        this.socket.readyState === WebSocket.OPEN &&
        !this.startedPlaying
      ) {
        Spicetify.Player.pause();
        console.log("[SpotiQueue] Requesting new song...");
        this.send({ c: "next_song" });
      }
      this.startedPlaying = false;
    });
  }
}

(function init() {
  if (
    !Spicetify.Player ||
    !Spicetify.Platform ||
    !Spicetify.GraphQL ||
    !Spicetify.GraphQL.Request ||
    !Spicetify.GraphQL.Definitions
  ) {
    setTimeout(init, 100);
    console.log("[SpotiQueue] loading extension... ");
    return;
  }

  globalThis.spotiQueue = new SpotiQueue();
  globalThis.spotiQueue.initUi();
})();