const express = require('express');
const multer = require('multer');
const path = require('path');
const fs = require('fs');
const { authMiddleware } = require('../middleware/auth');
const projectService = require('../services/projectService');

const router = express.Router();

const storage = multer.diskStorage({
  destination: (req, file, cb) => {
    const uploadDir = path.join(__dirname, '../../uploads');
    if (!fs.existsSync(uploadDir)) {
      fs.mkdirSync(uploadDir, { recursive: true });
    }
    cb(null, uploadDir);
  },
  filename: (req, file, cb) => {
    const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1E9);
    cb(null, uniqueSuffix + '-' + file.originalname);
  }
});

const upload = multer({ 
  storage,
  limits: { fileSize: 100 * 1024 * 1024 }
});

router.get('/', authMiddleware, (req, res) => {
  const projects = projectService.getAllProjects();
  res.json(projects);
});

router.get('/:id', authMiddleware, (req, res) => {
  const project = projectService.getProjectById(req.params.id);
  if (!project) {
    return res.status(404).json({ error: 'Project not found' });
  }
  res.json(project);
});

router.post('/', authMiddleware, upload.array('files'), (req, res) => {
  const { name, description, path: projectPath } = req.body;
  const files = req.files;

  if (!name) {
    return res.status(400).json({ error: 'Project name is required' });
  }

  if (!files || files.length === 0) {
    return res.status(400).json({ error: 'At least one file is required' });
  }

  let normalizedPath = projectPath ? projectPath.trim() : '';
  if (normalizedPath && !normalizedPath.startsWith('/')) {
    normalizedPath = '/' + normalizedPath;
  }

  const project = projectService.createProject({
    name,
    description: description || '',
    path: normalizedPath,
    files
  });

  res.status(201).json(project);
});

router.put('/:id', authMiddleware, (req, res) => {
  const { name, description } = req.body;
  const project = projectService.updateProject(req.params.id, { name, description });
  
  if (!project) {
    return res.status(404).json({ error: 'Project not found' });
  }
  
  res.json(project);
});

router.delete('/:id', authMiddleware, (req, res) => {
  const success = projectService.deleteProject(req.params.id);
  
  if (!success) {
    return res.status(404).json({ error: 'Project not found' });
  }
  
  res.json({ message: 'Project deleted successfully' });
});

router.post('/:id/files', authMiddleware, upload.array('files'), (req, res) => {
  const files = req.files;
  
  if (!files || files.length === 0) {
    return res.status(400).json({ error: 'No files uploaded' });
  }

  const project = projectService.addFilesToProject(req.params.id, files);
  
  if (!project) {
    return res.status(404).json({ error: 'Project not found' });
  }
  
  res.json(project);
});

module.exports = router;