import { app, BrowserWindow, dialog, Menu, protocol } from 'electron';

import { ipcChannels, type SessionState } from '../shared/ipc/contracts';

import { EffectsStore } from './effects/effectsStore';
import { installIpcRouter, registerHandler } from './ipc/router';
import { ZipProjectStore } from './project/zipStore';
import { registerDndAssetProtocol } from './protocol/dndAssetProtocol';
import { getAppSemanticVersion, getOptionalBuildNumber } from './versionInfo';
import { VideoPlaybackStore } from './video/videoPlaybackStore';
import {
  closeMultiWindow,
  createWindows,
  focusEditorWindow,
  markAppQuitting,
  openMultiWindow,
  togglePresentationFullscreen,
} from './windows/createWindows';

if (process.platform === 'win32') {
  app.setAppUserModelId('com.dndplayer.app');
}
// Не вызывать app.setName() с другим именем: на Windows/macOS меняется каталог userData,
// и проекты в …/userData/projects «пропадают» из списка (остаются в старой папке).

protocol.registerSchemesAsPrivileged([
  {
    scheme: 'dnd',
    privileges: {
      standard: true,
      secure: true,
      supportFetchAPI: true,
      corsEnabled: true,
    },
  },
]);

const gotTheLock = app.requestSingleInstanceLock();
if (!gotTheLock) {
  app.quit();
} else {
  app.on('second-instance', () => {
    focusEditorWindow();
  });
}

const projectStore = new ZipProjectStore();
const effectsStore = new EffectsStore();
const videoStore = new VideoPlaybackStore();

function emitEffectsState(): void {
  const state = effectsStore.getState();
  for (const win of BrowserWindow.getAllWindows()) {
    win.webContents.send(ipcChannels.effects.stateChanged, { state });
  }
}

function emitVideoState(): void {
  const state = videoStore.getState();
  for (const win of BrowserWindow.getAllWindows()) {
    win.webContents.send(ipcChannels.video.stateChanged, { state });
  }
}

// Периодически чистим истёкшие эффекты (в основном молнии).
setInterval(() => {
  if (effectsStore.pruneExpired()) {
    emitEffectsState();
  }
}, 500);

// Пока видео "играет" — периодически рассылаем state (нужен для новых окон и коррекции).
setInterval(() => {
  if (videoStore.getState().playing) {
    emitVideoState();
  }
}, 500);

function emitSessionState(): void {
  const project = projectStore.getOpenProject();
  const state: SessionState = {
    project,
    currentSceneId: project?.currentSceneId ?? null,
  };
  for (const win of BrowserWindow.getAllWindows()) {
    win.webContents.send(ipcChannels.session.stateChanged, { state });
  }
}

async function main() {
  await app.whenReady();
  Menu.setApplicationMenu(null);
  registerDndAssetProtocol(projectStore);
  registerHandler(ipcChannels.app.quit, () => {
    markAppQuitting();
    app.quit();
    return { ok: true };
  });
  registerHandler(ipcChannels.app.getVersion, () => ({
    version: getAppSemanticVersion(),
    buildNumber: getOptionalBuildNumber(),
  }));
  registerHandler(ipcChannels.windows.openMultiWindow, () => {
    openMultiWindow();
    return { ok: true };
  });
  registerHandler(ipcChannels.windows.closeMultiWindow, () => {
    closeMultiWindow();
    return { ok: true };
  });
  registerHandler(ipcChannels.windows.togglePresentationFullscreen, () => {
    const isFullScreen = togglePresentationFullscreen();
    return { ok: true, isFullScreen };
  });

  registerHandler(ipcChannels.project.list, async () => {
    const projects = await projectStore.listProjects();
    return {
      projects: projects.map((p) => ({
        id: p.id,
        name: p.name,
        updatedAt: p.updatedAt,
        fileName: p.fileName,
      })),
    };
  });
  registerHandler(ipcChannels.project.create, async ({ name }) => {
    const project = await projectStore.createProject(name);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.open, async ({ projectId }) => {
    const project = await projectStore.openProjectById(projectId);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.get, () => {
    return { project: projectStore.getOpenProject() };
  });
  registerHandler(ipcChannels.project.saveNow, async () => {
    await projectStore.saveNow();
    return { ok: true };
  });
  registerHandler(ipcChannels.project.setCurrentScene, async ({ sceneId }) => {
    await projectStore.updateProject((p) => ({ ...p, currentSceneId: sceneId, currentGraphNodeId: null }));
    effectsStore.clear();
    emitEffectsState();
    emitSessionState();
    return { currentSceneId: projectStore.getOpenProject()?.currentSceneId ?? null };
  });
  registerHandler(ipcChannels.project.setCurrentGraphNode, async ({ graphNodeId }) => {
    const open = projectStore.getOpenProject();
    if (!open) throw new Error('No open project');
    const gn = graphNodeId ? open.sceneGraphNodes.find((n) => n.id === graphNodeId) : null;
    await projectStore.updateProject((p) => ({
      ...p,
      currentGraphNodeId: graphNodeId,
      currentSceneId: gn ? gn.sceneId : null,
    }));
    effectsStore.clear();
    emitEffectsState();
    emitSessionState();
    const p = projectStore.getOpenProject();
    return {
      currentGraphNodeId: p?.currentGraphNodeId ?? null,
      currentSceneId: p?.currentSceneId ?? null,
    };
  });
  registerHandler(ipcChannels.project.updateScene, async ({ sceneId, patch }) => {
    const next = await projectStore.updateScene(sceneId, patch);
    emitSessionState();
    return { scene: next };
  });
  registerHandler(ipcChannels.project.updateConnections, async ({ sceneId, connections }) => {
    const next = await projectStore.updateConnections(sceneId, connections);
    emitSessionState();
    return { scene: next };
  });
  registerHandler(ipcChannels.project.importMedia, async ({ sceneId }) => {
    const { canceled, filePaths } = await dialog.showOpenDialog({
      properties: ['openFile', 'multiSelections'],
      filters: [
        {
          name: 'Видео и аудио',
          extensions: ['mp4', 'webm', 'mov', 'mp3', 'wav', 'ogg', 'm4a', 'aac'],
        },
      ],
    });
    if (canceled || filePaths.length === 0) {
      const project = projectStore.getOpenProject();
      if (!project) throw new Error('No open project');
      return { project, imported: [] };
    }
    const result = await projectStore.importMediaFiles(sceneId, filePaths);
    emitSessionState();
    return result;
  });
  registerHandler(ipcChannels.project.importScenePreview, async ({ sceneId }) => {
    const { canceled, filePaths } = await dialog.showOpenDialog({
      properties: ['openFile'],
      filters: [
        {
          name: 'Изображения и видео',
          extensions: ['png', 'jpg', 'jpeg', 'webp', 'gif', 'bmp', 'mp4', 'webm', 'mov'],
        },
      ],
    });
    if (canceled || !filePaths[0]) {
      const project = projectStore.getOpenProject();
      if (!project) throw new Error('No open project');
      return { project };
    }
    const project = await projectStore.importScenePreviewMedia(sceneId, filePaths[0]);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.clearScenePreview, async ({ sceneId }) => {
    const project = await projectStore.clearScenePreview(sceneId);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.updateSceneGraphNodePosition, async ({ nodeId, x, y }) => {
    const project = await projectStore.updateSceneGraphNodePosition(nodeId, x, y);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.addSceneGraphNode, async ({ sceneId, x, y }) => {
    const project = await projectStore.addSceneGraphNode(sceneId, x, y);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.removeSceneGraphNode, async ({ nodeId }) => {
    const project = await projectStore.removeSceneGraphNode(nodeId);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.addSceneGraphEdge, async ({ sourceGraphNodeId, targetGraphNodeId }) => {
    const project = await projectStore.addSceneGraphEdge(sourceGraphNodeId, targetGraphNodeId);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.removeSceneGraphEdge, async ({ edgeId }) => {
    const project = await projectStore.removeSceneGraphEdge(edgeId);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.setSceneGraphNodeStart, async ({ graphNodeId }) => {
    const project = await projectStore.setSceneGraphNodeStart(graphNodeId);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.deleteScene, async ({ sceneId }) => {
    const project = await projectStore.deleteScene(sceneId);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.rename, async ({ name, fileBaseName }) => {
    const project = await projectStore.renameOpenProject(name, fileBaseName);
    emitSessionState();
    return { project };
  });
  registerHandler(ipcChannels.project.importZip, async () => {
    const { canceled, filePaths } = await dialog.showOpenDialog({
      properties: ['openFile'],
      filters: [{ name: 'Проект DND (*.dnd.zip)', extensions: ['dnd.zip'] }],
    });
    if (canceled || !filePaths[0]) {
      return { canceled: true as const };
    }
    const project = await projectStore.importProjectFromExternalZip(filePaths[0]);
    emitSessionState();
    return { canceled: false as const, project };
  });
  registerHandler(ipcChannels.project.exportZip, async ({ projectId }) => {
    const list = await projectStore.listProjects();
    const entry = list.find((p) => p.id === projectId);
    if (!entry) {
      throw new Error('Проект не найден');
    }
    const defaultName = entry.fileName.toLowerCase().endsWith('.dnd.zip')
      ? entry.fileName
      : `${entry.fileName}.dnd.zip`;
    const { canceled, filePath } = await dialog.showSaveDialog({
      defaultPath: defaultName,
      filters: [{ name: 'Проект DND (*.dnd.zip)', extensions: ['dnd.zip'] }],
    });
    if (canceled || !filePath) {
      return { canceled: true as const };
    }
    let dest = filePath;
    const lower = dest.toLowerCase();
    if (!lower.endsWith('.dnd.zip')) {
      dest = lower.endsWith('.zip') ? dest.replace(/\.zip$/iu, '.dnd.zip') : `${dest}.dnd.zip`;
    }
    await projectStore.exportProjectZipToPath(projectId, dest);
    return { canceled: false as const };
  });
  registerHandler(ipcChannels.project.deleteProject, async ({ projectId }) => {
    await projectStore.deleteProjectById(projectId);
    emitSessionState();
    return { ok: true };
  });
  registerHandler(ipcChannels.project.assetFileUrl, ({ assetId }) => ({
    url: projectStore.getAssetFileUrl(assetId),
  }));

  registerHandler(ipcChannels.effects.getState, () => {
    return { state: effectsStore.getState() };
  });
  registerHandler(ipcChannels.effects.dispatch, ({ event }) => {
    effectsStore.dispatch(event);
    emitEffectsState();
    return { ok: true };
  });

  registerHandler(ipcChannels.video.getState, () => {
    return { state: videoStore.getState() };
  });
  registerHandler(ipcChannels.video.dispatch, ({ event }) => {
    videoStore.dispatch(event);
    emitVideoState();
    return { ok: true };
  });

  installIpcRouter();
  createWindows();
  emitSessionState();
  emitEffectsState();
  emitVideoState();

  app.on('activate', () => {
    focusEditorWindow();
  });
}

if (gotTheLock) {
  void main();
}

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit();
  }
});