import express from 'express';
import Todo from '../models/Todo.js';

const router = express.Router();

// Get todos for a specific date
router.get('/', async (req, res) => {
  try {
    const { date } = req.query;
    let query = { userId: req.user._id };

    if (date) {
      const startDate = new Date(date);
      const endDate = new Date(date);
      endDate.setDate(endDate.getDate() + 1);
      
      query.dueDate = {
        $gte: startDate,
        $lt: endDate
      };
    }

    const todos = await Todo.find(query).sort({ createdAt: -1 });
    res.json(todos);
  } catch (error) {
    res.status(500).json({ message: 'Server error', error: error.message });
  }
});

// Create new todo
router.post('/', async (req, res) => {
  try {
    const { title, description, priority, dueDate } = req.body;

    const todo = new Todo({
      title,
      description,
      priority,
      dueDate: new Date(dueDate),
      userId: req.user._id
    });

    await todo.save();
    res.status(201).json(todo);
  } catch (error) {
    res.status(500).json({ message: 'Server error', error: error.message });
  }
});

// Update todo
router.put('/:id', async (req, res) => {
  try {
    const { id } = req.params;
    const updates = req.body;

    const todo = await Todo.findOneAndUpdate(
      { _id: id, userId: req.user._id },
      updates,
      { new: true }
    );

    if (!todo) {
      return res.status(404).json({ message: 'Todo not found' });
    }

    res.json(todo);
  } catch (error) {
    res.status(500).json({ message: 'Server error', error: error.message });
  }
});

// Delete todo
router.delete('/:id', async (req, res) => {
  try {
    const { id } = req.params;

    const todo = await Todo.findOneAndDelete({
      _id: id,
      userId: req.user._id
    });

    if (!todo) {
      return res.status(404).json({ message: 'Todo not found' });
    }

    res.json({ message: 'Todo deleted successfully' });
  } catch (error) {
    res.status(500).json({ message: 'Server error', error: error.message });
  }
});

export default router;