import { fetchConfig, FrameStream } from "../api.js";
import "./portal-controls.js";
import "./portal-viewport.js";
import "./portal-schematic.js";

const APP_STYLES = `
  :host {
    display: grid;
    grid-template-columns: 280px 1fr;
    height: 100vh;
    --border: #2a3044;
    --panel: #12151f;
    --text: #e8ecf7;
    --muted: #8b93a8;
    --accent: #5b8cff;
  }
  main {
    position: relative;
    min-width: 0;
    height: 100%;
  }
  portal-viewport {
    width: 100%;
    height: 100%;
  }
  portal-viewport[hidden] {
    display: none;
  }
  .status {
    position: absolute;
    left: 1rem;
    bottom: 1rem;
    padding: 0.35rem 0.6rem;
    background: rgba(0, 0, 0, 0.55);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--muted);
    pointer-events: none;
    font-family: system-ui, sans-serif;
  }
  @media (max-width: 800px) {
    :host {
      grid-template-columns: 1fr;
      grid-template-rows: auto 1fr;
    }
    portal-controls {
      border-right: none;
      border-bottom: 1px solid var(--border);
    }
  }
`;

export class PortalApp extends HTMLElement {
  constructor() {
    super();
    /** @type {import('../api.js').PortalConfig | null} */
    this._config = null;
    /** @type {FrameStream | null} */
    this._stream = null;
    /** @type {import('./portal-controls.js').PortalControls | null} */
    this._controls = null;
    /** @type {import('./portal-viewport.js').PortalViewport | null} */
    this._viewport = null;
    /** @type {import('./portal-schematic.js').PortalSchematic | null} */
    this._schematic = null;
    this._settings = {
      animation: "rainbow",
      brightness: 0.35,
      fps: 25,
      paused: false,
      identify: false,
      view3d: true,
    };
  }

  connectedCallback() {
    if (this.shadowRoot) return;
    const root = this.attachShadow({ mode: "open" });
    root.innerHTML = `
      <style>${APP_STYLES}</style>
      <portal-controls></portal-controls>
      <main>
        <portal-viewport></portal-viewport>
        <portal-schematic></portal-schematic>
        <div class="status">Loading…</div>
      </main>
    `;

    this._controls = root.querySelector("portal-controls");
    this._viewport = root.querySelector("portal-viewport");
    this._schematic = root.querySelector("portal-schematic");
    this._status = root.querySelector(".status");

    this.addEventListener("portal-settings", (e) => {
      this._settings = e.detail;
      this._viewport.hidden = !this._settings.view3d;
      this._schematic.visible = !this._settings.view3d;
      if (this._settings.paused && this._settings.identify && this._config) {
        for (const panel of this._config.panels) {
          this._viewport.updatePanel(panel.index, [], panel.width, panel.height, true);
          this._schematic.updatePanel(panel.index, [], panel.width, panel.height, true);
        }
      }
      this._syncStream();
    });

    this._init();
  }

  disconnectedCallback() {
    this._stream?.stop();
  }

  async _init() {
    try {
      this._config = await fetchConfig();
      this._controls.setConfig(this._config);
      this._viewport.setPanels(this._config.panels);
      this._schematic.setPanels(this._config.panels);
      this._status.textContent = "Ready";
      this._syncStream();
    } catch (err) {
      this._status.textContent = `Error: ${err.message}`;
    }
  }

  _syncStream() {
    this._stream?.stop();
    if (this._settings.paused) return;

    this._stream = new FrameStream((payload) => this._onFrame(payload));
    this._stream.onDisconnect = () => {
      this._status.textContent = "Stream disconnected — retrying…";
    };
    this._stream.start({
      animation: this._settings.animation,
      brightness: this._settings.brightness,
      fps: this._settings.fps,
    });
  }

  /** @param {import('../api.js').FramePayload} payload */
  _onFrame(payload) {
    const { identify } = this._settings;
    for (const panel of payload.panels) {
      this._viewport.updatePanel(panel.index, panel.rgb, panel.width, panel.height, identify);
      this._schematic.updatePanel(panel.index, panel.rgb, panel.width, panel.height, identify);
    }
    this._status.textContent = `${payload.animation} · frame ${payload.frame}`;
  }
}

customElements.define("portal-app", PortalApp);