import express from 'express';
import cors from 'cors';
import path from 'path';
import fs from 'fs';
import { fileURLToPath } from 'url';
import boardRoutes from './routes/boardRoutes.js';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
export function createApp() {
    const app = express();
    // CORS configuration
    app.use(cors({
        origin: (origin, callback) => {
            callback(null, true);
        },
        credentials: true,
    }));
    app.use(express.json());
    // Health check endpoint
    app.get('/health', (_req, res) => {
        res.json({
            status: 'ok',
            service: 'retro-kanban-server',
            timestamp: new Date().toISOString(),
        });
    });
    // API Routes
    app.use('/api/boards', boardRoutes);
    // Serve static frontend assets in production (when client build exists)
    const clientDistPaths = [
        path.join(__dirname, '../public'),
        path.join(__dirname, '../../client/dist'),
        path.join(__dirname, '../client/dist'),
        path.join(process.cwd(), 'client/dist'),
        path.join(process.cwd(), 'public'),
    ];
    let staticPath = clientDistPaths.find((p) => fs.existsSync(p));
    if (staticPath) {
        console.log(`📁 [Static Assets] Serving frontend from: ${staticPath}`);
        app.use(express.static(staticPath));
        // SPA fallback: any non-API route serves index.html
        app.get('*', (req, res, next) => {
            if (req.path.startsWith('/api') || req.path.startsWith('/socket.io')) {
                return next();
            }
            res.sendFile(path.join(staticPath, 'index.html'));
        });
    }
    // Global Error Handler
    app.use((err, _req, res, _next) => {
        console.error('Unhandled server error:', err);
        res.status(500).json({
            error: 'Internal Server Error',
            message: process.env.NODE_ENV === 'development' ? err.message : undefined,
        });
    });
    return app;
}