import fs from 'fs';
import path from 'path';
import express from 'express';
import cookieParser from 'cookie-parser';
import cors from 'cors';
import { config } from './config';
import { runMigrations } from './db/migrate';
import { requireAuth } from './middleware/auth';

const pkg = JSON.parse(
  fs.readFileSync(path.join(__dirname, '..', 'package.json'), 'utf-8'),
) as { version: string };

import authRouter from './routes/auth';
import importRouter from './routes/import';
import importsRouter from './routes/imports';
import transactionsRouter from './routes/transactions';
import accountsRouter from './routes/accounts';
import categoriesRouter from './routes/categories';
import categoryRulesRouter from './routes/categoryRules';
import analyticsRouter from './routes/analytics';

const app = express();
app.set('trust proxy', 1);

app.use(express.json({ limit: '10mb' }));
app.use(cookieParser());
app.use(cors({ origin: true, credentials: true }));

// Auth routes (login is public; me/logout apply auth internally)
app.use('/api/auth', authRouter);

app.get('/api/version', (_req, res) => {
  res.json({ version: pkg.version });
});

// All remaining /api routes require authentication
app.use('/api', requireAuth);
app.use('/api/import', importRouter);
app.use('/api/imports', importsRouter);
app.use('/api/transactions', transactionsRouter);
app.use('/api/accounts', accountsRouter);
app.use('/api/categories', categoriesRouter);
app.use('/api/category-rules', categoryRulesRouter);
app.use('/api/analytics', analyticsRouter);

app.use(
  (
    err: Error,
    _req: express.Request,
    res: express.Response,
    _next: express.NextFunction,
  ) => {
    console.error(err);
    res.status(500).json({ error: 'INTERNAL_ERROR', message: 'Internal server error' });
  },
);

async function start() {
  await runMigrations();
  app.listen(config.port, () => {
    console.log(`Backend listening on port ${config.port}`);
  });
}

start().catch((err) => {
  console.error('Failed to start:', err);
  process.exit(1);
});