import { app, BrowserWindow, dialog, ipcMain } from 'electron';
import type { OpenDialogOptions } from 'electron';
import path from 'node:path';
import fs from 'node:fs';
import crypto from 'node:crypto';
import axios from 'axios';

type Nonce = { id?: string; _id?: string; nonce: string; expiresAt?: string };

let mainWindow: BrowserWindow | null = null;
let privateKey: Buffer | null = null;
let privateKeyPath: string | null = null;

const apiHost = (process.env.API_HOST || 'https://api.turnosxpress.com.ar').replace(/\/+$/, '');

const adminRoutes: Record<string, { path: string; timeout?: number }> = {
  'users/paginate': { path: '/sysadmin/users/paginate', timeout: 5000 },
  'users/update': { path: '/sysadmin/users/update', timeout: 5000 },
  'users/set-verified': { path: '/sysadmin/users/set-verified', timeout: 5000 },
  'users/delete': { path: '/sysadmin/users/delete', timeout: 10000 },
  'users/organizations-status': { path: '/sysadmin/users/organizations-status', timeout: 5000 },
  'users/recalculate-plan-usage-cycle': { path: '/sysadmin/plan-usage-cycle/recalculate-user', timeout: 10000 },
  'users/subscription-details': { path: '/sysadmin/subscriptions/user-details', timeout: 10000 },
  'users/extend-subscription': { path: '/sysadmin/subscriptions/extend-user', timeout: 10000 },
  'users/finalize-subscription': { path: '/sysadmin/subscriptions/finalize-user', timeout: 10000 },
  'plans/list': { path: '/sysadmin/plans/list', timeout: 5000 },
  'plans/update': { path: '/sysadmin/plans/update', timeout: 5000 },
  'wap/paginate': { path: '/sysadmin/wapserver/get', timeout: 5000 },
  'wap/audit': { path: '/sysadmin/wapserver/audit', timeout: 10000 },
  'wap/create': { path: '/sysadmin/wapserver/create', timeout: 5000 },
  'wap/update': { path: '/sysadmin/wapserver/update', timeout: 5000 },
  'wap/recalculate-count': { path: '/sysadmin/wapserver/recalculate-count', timeout: 5000 },
  'wap/delete': { path: '/sysadmin/wapserver/delete', timeout: 15000 },
  'wap/bot/start': { path: '/sysadmin/wapserver/bot/start', timeout: 10000 },
  'wap/bot/stop': { path: '/sysadmin/wapserver/bot/stop', timeout: 10000 },
  'wap/bot/restart': { path: '/sysadmin/wapserver/bot/restart', timeout: 15000 },
  'wap/bot/qr': { path: '/sysadmin/wapserver/bot/qr', timeout: 10000 },
  'wap/bot/delete': { path: '/sysadmin/wapserver/bot/delete', timeout: 10000 },
  'wap/bot/detach': { path: '/sysadmin/wapserver/bot/detach', timeout: 10000 },
  'companies/paginate': { path: '/sysadmin/companies/paginate' },
  'companies/update': { path: '/sysadmin/companies/update' },
  'companies/set-banned': { path: '/sysadmin/companies/set-banned' },
  'companies/insights': { path: '/sysadmin/companies/insights' },
  'services/paginate': { path: '/sysadmin/services/paginate' },
  'services/set-banned': { path: '/sysadmin/services/set-banned' },
};

const createWindow = () => {
  mainWindow = new BrowserWindow({
    width: 1280,
    height: 820,
    minWidth: 980,
    minHeight: 640,
    frame: false,
    titleBarStyle: 'hidden',
    backgroundColor: '#0f172a',
    icon: path.join(__dirname, '../build/icon.png'),
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false,
    },
  });

  if (process.env.VITE_DEV_SERVER_URL) {
    void mainWindow.loadURL(process.env.VITE_DEV_SERVER_URL);
  } else {
    void mainWindow.loadFile(path.join(__dirname, '../dist/index.html'));
  }
};

const loadPrivateKey = async (filePath: string) => {
  const key = await fs.promises.readFile(filePath);
  crypto.createPrivateKey(key);
  privateKey = key;
  privateKeyPath = filePath;
};

const createPayload = async () => {
  if (!privateKey) {
    throw new Error('Load a private key before using admin functions.');
  }

  const nonceResponse = await axios.get<Nonce>(`${apiHost}/sysadmin-challenges/create`, {
    headers: { 'Content-Type': 'application/json' },
    timeout: 5000,
  });

  if (nonceResponse.status !== 201 || !nonceResponse.data?.nonce) {
    throw new Error('Could not create the sysadmin nonce.');
  }

  const signature = crypto.sign(null, Buffer.from(nonceResponse.data.nonce), privateKey);
  return { nonce: nonceResponse.data, signature: signature.toString('base64') };
};

const formatError = (error: unknown) => {
  if (axios.isAxiosError(error)) {
    const data = error.response?.data;
    const message = typeof data === 'string' ? data : data?.desc || data?.message || data?.error || error.message;
    return { message, status: error.response?.status, data };
  }

  return { message: error instanceof Error ? error.message : 'Unknown error' };
};

ipcMain.handle('key:status', () => ({ loaded: Boolean(privateKey), path: privateKeyPath }));

ipcMain.handle('window:minimize', () => mainWindow?.minimize());

ipcMain.handle('window:toggle-maximize', () => {
  if (!mainWindow) return false;
  if (mainWindow.isMaximized()) {
    mainWindow.unmaximize();
    return false;
  }
  mainWindow.maximize();
  return true;
});

ipcMain.handle('window:close', () => mainWindow?.close());

ipcMain.handle('key:select', async () => {
  const dialogOptions: OpenDialogOptions = {
    title: 'Select sysadmin private key',
    properties: ['openFile'],
    filters: [{ name: 'Private key', extensions: ['key', 'pem', '*'] }],
  };
  const result = mainWindow
    ? await dialog.showOpenDialog(mainWindow, dialogOptions)
    : await dialog.showOpenDialog(dialogOptions);

  if (result.canceled || !result.filePaths[0]) {
    return { loaded: Boolean(privateKey), path: privateKeyPath };
  }

  await loadPrivateKey(result.filePaths[0]);
  return { loaded: true, path: privateKeyPath };
});

ipcMain.handle('admin:request', async (_event, routeName: string, body: unknown) => {
  if (!privateKey) {
    throw new Error('Load a private key before using admin functions.');
  }

  const route = adminRoutes[routeName];
  if (!route) {
    throw new Error(`Unsupported admin route: ${routeName}`);
  }

  try {
    const payload = await createPayload();
    const response = await axios.post(`${apiHost}${route.path}`, { ...(body as object), payload }, {
      headers: { 'Content-Type': 'application/json' },
      timeout: route.timeout ?? 5000,
    });
    return response.data;
  } catch (error) {
    throw new Error(JSON.stringify(formatError(error)));
  }
});

void app.whenReady().then(createWindow);

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

app.on('activate', () => {
  if (BrowserWindow.getAllWindows().length === 0) createWindow();
});