import 'dotenv/config';
import express from 'express';
import cors from 'cors';
import path from 'path';
import cookieParser from 'cookie-parser';
import { bigintToNumber } from './lib/prisma';

import authRoutes from './routes/auth';
import projectRoutes from './routes/projects';
import assetRoutes from './routes/assets';
import commentRoutes from './routes/comments';
import userRoutes from './routes/users';
import invitationRoutes from './routes/invitations';
import settingsRoutes from './routes/settings';
import shareRoutes from './routes/share';
import folderRoutes from './routes/folders';

const app = express();
const PORT = process.env.API_PORT || 3001;

// ── Middleware ────────────────────────────────────────────────────────────────
const allowedOrigins = (process.env.ALLOWED_ORIGINS || '').split(',').filter(Boolean);
app.use(cors({
  origin: (origin, callback) => {
    // Allow if: no origin (server-side), OR '*', OR origin is in allowed list
    if (!origin || allowedOrigins.includes('*') || allowedOrigins.includes(origin)) {
      callback(null, true);
    } else {
      callback(new Error(`Origin ${origin} not allowed by CORS policy`));
    }
  },
  credentials: true,
}));
app.use(express.json());
app.use(cookieParser());

// ── Serve uploaded files ──────────────────────────────────────────────────────
const UPLOAD_DIR = process.env.UPLOAD_DIR || './uploads';
app.use('/uploads', express.static(path.resolve(UPLOAD_DIR)));

// ── Routes ───────────────────────────────────────────────────────────────────
app.get('/health', (_req, res) => res.json({ status: 'ok', timestamp: new Date().toISOString() }));

app.use('/api/auth', authRoutes);
app.use('/api/projects', projectRoutes);
app.use('/api/assets', assetRoutes);
app.use('/api/assets', commentRoutes);
app.use('/api/comments', commentRoutes);
app.use('/api/users', userRoutes);
app.use('/api/invitations', invitationRoutes);
app.use('/api/settings', settingsRoutes);
app.use('/api/share', shareRoutes);
app.use('/api/folders', folderRoutes);

// ── BigInt-safe res.json() — patch Response prototype ─────────────────────────
// Adding toJSON to BigInt prototype auto-converts BigInt → Number in JSON.stringify
// This works because Express uses JSON.stringify internally for res.json()
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(BigInt.prototype as any).toJSON = function () { return Number(this); };

// ── 404 handler ─────────────────────────────────────────────────────────────
app.use((_req, res) => {
  res.status(404).json({ error: 'Not found' });
});

// ── Error handler ─────────────────────────────────────────────────────────────
app.use((err: Error, _req: express.Request, res: express.Response, _next: express.NextFunction) => {
  console.error('Unhandled error:', err);
  const status = (err as any).statusCode ?? 500;
  const message = (err as any).statusCode ? err.message : 'Internal server error';
  res.status(status).json({ error: message });
});

// ── Start ────────────────────────────────────────────────────────────────────
app.listen(PORT, () => {
  console.log(`🚀 VidReview API running on http://localhost:${PORT}`);
});