'use strict';

const path = require('node:path');
const { app, BrowserWindow, shell, session, safeStorage } = require('electron');
const { ConfigStore } = require('./src/main/config-store.cjs');
const { GitService } = require('./src/main/git-service.cjs');
const { GiteaService } = require('./src/main/gitea-service.cjs');
const { RepositoryService } = require('./src/main/repository-service.cjs');
const { DeploymentService } = require('./src/main/deployment-service.cjs');
const { RepositoryMonitor } = require('./src/main/repository-monitor.cjs');
const { DiagnosticsService } = require('./src/main/diagnostics-service.cjs');
const { PreflightService } = require('./src/main/preflight-service.cjs');
const { UpdateService } = require('./src/main/update-service.cjs');
const { SshService } = require('./src/main/ssh-service.cjs');
const { UnraidDeploymentService } = require('./src/main/unraid-deployment-service.cjs');
const { registerIpc } = require('./src/main/ipc.cjs');

let mainWindow;
let repositoryMonitor;
let operationTimer;
let diagnostics;
let quitCleanupStarted = false;

function broadcast(channel, payload) {
  for (const window of BrowserWindow.getAllWindows()) {
    if (!window.isDestroyed()) window.webContents.send(channel, payload);
  }
}

function createWindow() {
  mainWindow = new BrowserWindow({
    width: 1480,
    height: 940,
    minWidth: 1120,
    minHeight: 720,
    show: false,
    backgroundColor: '#0b0e14',
    title: 'ForgeFlow',
    icon: path.join(__dirname, 'build', 'icon.png'),
    autoHideMenuBar: true,
    titleBarStyle: process.platform === 'darwin' ? 'hiddenInset' : 'default',
    webPreferences: {
      preload: path.join(__dirname, 'preload.cjs'),
      contextIsolation: true,
      nodeIntegration: false,
      sandbox: true,
      webSecurity: true,
      spellcheck: false
    }
  });

  mainWindow.loadFile(path.join(__dirname, 'src', 'renderer', 'index.html'));
  mainWindow.once('ready-to-show', () => {
    mainWindow.show();
    diagnostics?.info('window.ready', { size: mainWindow.getSize() });
  });
  mainWindow.on('unresponsive', () => diagnostics?.warning('window.unresponsive', {}));
  mainWindow.webContents.on('render-process-gone', (_event, details) => diagnostics?.error('renderer.process.gone', details));
  mainWindow.webContents.on('did-fail-load', (_event, code, description, validatedUrl) => diagnostics?.error('renderer.load.failed', { code, description, validatedUrl }));
  mainWindow.webContents.setWindowOpenHandler(({ url }) => {
    if (/^https?:\/\//i.test(url)) shell.openExternal(url);
    return { action: 'deny' };
  });
  mainWindow.webContents.on('will-navigate', (event, url) => {
    if (url !== mainWindow.webContents.getURL()) event.preventDefault();
  });
}

app.whenReady().then(async () => {
  session.defaultSession.webRequest.onHeadersReceived((details, callback) => {
    callback({
      responseHeaders: {
        ...details.responseHeaders,
        'Content-Security-Policy': [
          "default-src 'self'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self'; connect-src 'self'"
        ]
      }
    });
  });

  const userDataPath = app.getPath('userData');
  const store = new ConfigStore(userDataPath);
  await store.load();
  diagnostics = new DiagnosticsService({
    userDataPath,
    appInfo: { name: app.getName(), version: app.getVersion(), packaged: app.isPackaged },
    secretProvider: () => [
      store.getToken(),
      ...(store.data.servers || []).flatMap((server) => {
        try {
          const credentials = store.getServerCredentials(server.id);
          return [credentials.password, credentials.passphrase];
        } catch { return []; }
      })
    ],
    preferencesProvider: () => store.data.preferences
  });
  await diagnostics.initialize();

  process.on('uncaughtException', (error) => {
    diagnostics?.error('process.uncaught-exception', error).finally(() => app.exit(1));
  });
  process.on('unhandledRejection', (reason) => diagnostics?.error('process.unhandled-rejection', reason instanceof Error ? reason : { reason }));

  const git = new GitService();
  const gitea = new GiteaService(store, diagnostics);
  const repositories = new RepositoryService(store, git, gitea, diagnostics);
  const deployments = new DeploymentService(store, gitea, git, diagnostics);
  const ssh = new SshService({ store, diagnostics });
  const unraid = new UnraidDeploymentService({ store, ssh, git, diagnostics, sourcePath: app.getAppPath(), onOperationChange: (payload) => broadcast('operations:changed', payload) });
  const updates = new UpdateService({
    store,
    gitea,
    diagnostics,
    appInfo: { version: app.getVersion(), packaged: app.isPackaged },
    sourcePath: app.getAppPath(),
    userDataPath
  });
  const preflight = new PreflightService({
    store,
    git,
    gitea,
    deployments,
    diagnostics,
    userDataPath,
    secureStorageAvailable: () => safeStorage.isEncryptionAvailable()
  });
  repositoryMonitor = new RepositoryMonitor({
    store,
    git,
    diagnostics,
    onChange: (payload) => broadcast('repositories:changed', payload)
  });
  repositoryMonitor.restart();
  registerIpc({ store, git, gitea, repositories, deployments, unraid, ssh, updates, preflight, diagnostics, monitor: repositoryMonitor });
  createWindow();

  if (store.data.setupComplete && store.data.updates?.autoCheck && store.getToken()) {
    setTimeout(async () => {
      try {
        const status = await updates.check();
        broadcast('updates:changed', status);
      } catch (error) {
        await diagnostics.warning('updates.startup-check.failed', { message: error.message, code: error.code });
      }
    }, 2500).unref?.();
  }

  const gitAvailability = await git.isAvailable();
  await diagnostics.info('app.ready', {
    platform: process.platform,
    arch: process.arch,
    setupComplete: store.data.setupComplete,
    git: gitAvailability,
    secureStorageAvailable: safeStorage.isEncryptionAvailable()
  });

  const scheduleOperationPoll = () => {
    if (operationTimer) clearTimeout(operationTimer);
    const intervalMs = Math.max(3, Number(store.data.preferences.operationPollSeconds) || 5) * 1000;
    operationTimer = setTimeout(async () => {
      if (store.data.setupComplete) {
        const active = store.data.operations.some((item) => item.type === 'deployment' && !['success', 'failed', 'cancelled', 'rolled-back'].includes(item.status));
        if (active) {
          const [actions, sshOperations] = await Promise.all([
            store.getToken() ? deployments.refreshActiveOperations().catch(async (error) => { await diagnostics.error('operation-monitor.actions.failed', error); return []; }) : [],
            unraid.refreshActiveOperations().catch(async (error) => { await diagnostics.error('operation-monitor.unraid.failed', error); return []; })
          ]);
          const updated = [...actions, ...sshOperations];
          if (updated.length) broadcast('operations:changed', { operations: updated });
        }
      }
      scheduleOperationPoll();
    }, intervalMs);
    operationTimer.unref?.();
  };
  scheduleOperationPoll();

  app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) createWindow();
  });
}).catch(async (error) => {
  console.error('[startup]', error);
  await diagnostics?.error('app.startup.failed', error);
  await diagnostics?.flush();
  app.exit(1);
});

app.on('before-quit', (event) => {
  if (quitCleanupStarted) return;
  event.preventDefault();
  quitCleanupStarted = true;
  repositoryMonitor?.stop();
  if (operationTimer) clearTimeout(operationTimer);
  Promise.resolve()
    .then(() => diagnostics?.info('app.quitting', {}))
    .then(() => diagnostics?.flush())
    .finally(() => app.quit());
});

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