const express = require('express');
const { Op } = require('sequelize');
const { Rental, Item, User } = require('../models'); // Import from models/index.js to get models with associations
const { authenticateToken } = require('../middleware/auth');
const router = express.Router();

// Helper function to check and update review visibility
const checkAndUpdateReviewVisibility = async (rental) => {
  const now = new Date();
  const tenMinutesInMs = 10 * 60 * 1000; // 10 minutes

  let needsUpdate = false;
  let updates = {};

  // Check if both reviews are submitted
  if (rental.itemReviewSubmittedAt && rental.renterReviewSubmittedAt) {
    if (!rental.itemReviewVisible || !rental.renterReviewVisible) {
      updates.itemReviewVisible = true;
      updates.renterReviewVisible = true;
      needsUpdate = true;
    }
  } else {
    // Check item review visibility (10-minute rule)
    if (rental.itemReviewSubmittedAt && !rental.itemReviewVisible) {
      const timeSinceSubmission = now - new Date(rental.itemReviewSubmittedAt);
      if (timeSinceSubmission >= tenMinutesInMs) {
        updates.itemReviewVisible = true;
        needsUpdate = true;
      }
    }

    // Check renter review visibility (10-minute rule)
    if (rental.renterReviewSubmittedAt && !rental.renterReviewVisible) {
      const timeSinceSubmission = now - new Date(rental.renterReviewSubmittedAt);
      if (timeSinceSubmission >= tenMinutesInMs) {
        updates.renterReviewVisible = true;
        needsUpdate = true;
      }
    }
  }

  if (needsUpdate) {
    await rental.update(updates);
  }

  return rental;
};

router.get('/my-rentals', authenticateToken, async (req, res) => {
  try {
    const rentals = await Rental.findAll({
      where: { renterId: req.user.id },
      // Remove explicit attributes to let Sequelize handle missing columns gracefully
      include: [
        { model: Item, as: 'item' },
        { model: User, as: 'owner', attributes: ['id', 'username', 'firstName', 'lastName'] }
      ],
      order: [['createdAt', 'DESC']]
    });

    console.log('My-rentals data:', rentals.length > 0 ? rentals[0].toJSON() : 'No rentals');
    res.json(rentals);
  } catch (error) {
    console.error('Error in my-rentals route:', error);
    res.status(500).json({ error: error.message });
  }
});

router.get('/my-listings', authenticateToken, async (req, res) => {
  try {
    const rentals = await Rental.findAll({
      where: { ownerId: req.user.id },
      // Remove explicit attributes to let Sequelize handle missing columns gracefully
      include: [
        { model: Item, as: 'item' },
        { model: User, as: 'renter', attributes: ['id', 'username', 'firstName', 'lastName'] }
      ],
      order: [['createdAt', 'DESC']]
    });

    console.log('My-listings rentals:', rentals.length > 0 ? rentals[0].toJSON() : 'No rentals');
    res.json(rentals);
  } catch (error) {
    console.error('Error in my-listings route:', error);
    res.status(500).json({ error: error.message });
  }
});

router.post('/', authenticateToken, async (req, res) => {
  try {
    const { itemId, startDate, endDate, startTime, endTime, deliveryMethod, deliveryAddress, notes } = req.body;

    const item = await Item.findByPk(itemId);
    if (!item) {
      return res.status(404).json({ error: 'Item not found' });
    }

    if (!item.availability) {
      return res.status(400).json({ error: 'Item is not available' });
    }

    const overlappingRental = await Rental.findOne({
      where: {
        itemId,
        status: { [Op.in]: ['confirmed', 'active'] },
        [Op.or]: [
          {
            startDate: { [Op.between]: [startDate, endDate] }
          },
          {
            endDate: { [Op.between]: [startDate, endDate] }
          }
        ]
      }
    });

    if (overlappingRental) {
      return res.status(400).json({ error: 'Item is already booked for these dates' });
    }

    const rentalDays = Math.ceil((new Date(endDate) - new Date(startDate)) / (1000 * 60 * 60 * 24));
    const totalAmount = rentalDays * (item.pricePerDay || 0);

    const rental = await Rental.create({
      itemId,
      renterId: req.user.id,
      ownerId: item.ownerId,
      startDate,
      endDate,
      startTime,
      endTime,
      totalAmount,
      deliveryMethod,
      deliveryAddress,
      notes
    });

    const rentalWithDetails = await Rental.findByPk(rental.id, {
      include: [
        { model: Item, as: 'item' },
        { model: User, as: 'owner', attributes: ['id', 'username', 'firstName', 'lastName'] },
        { model: User, as: 'renter', attributes: ['id', 'username', 'firstName', 'lastName'] }
      ]
    });

    res.status(201).json(rentalWithDetails);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

router.put('/:id/status', authenticateToken, async (req, res) => {
  try {
    const { status } = req.body;
    const rental = await Rental.findByPk(req.params.id);

    if (!rental) {
      return res.status(404).json({ error: 'Rental not found' });
    }

    if (rental.ownerId !== req.user.id && rental.renterId !== req.user.id) {
      return res.status(403).json({ error: 'Unauthorized' });
    }

    await rental.update({ status });

    const updatedRental = await Rental.findByPk(rental.id, {
      include: [
        { model: Item, as: 'item' },
        { model: User, as: 'owner', attributes: ['id', 'username', 'firstName', 'lastName'] },
        { model: User, as: 'renter', attributes: ['id', 'username', 'firstName', 'lastName'] }
      ]
    });

    res.json(updatedRental);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

// Owner reviews renter
router.post('/:id/review-renter', authenticateToken, async (req, res) => {
  try {
    const { rating, review, privateMessage } = req.body;
    const rental = await Rental.findByPk(req.params.id);

    if (!rental) {
      return res.status(404).json({ error: 'Rental not found' });
    }

    if (rental.ownerId !== req.user.id) {
      return res.status(403).json({ error: 'Only owners can review renters' });
    }

    if (rental.status !== 'completed') {
      return res.status(400).json({ error: 'Can only review completed rentals' });
    }

    if (rental.renterReviewSubmittedAt) {
      return res.status(400).json({ error: 'Renter review already submitted' });
    }

    // Submit the review and private message
    await rental.update({ 
      renterRating: rating, 
      renterReview: review,
      renterReviewSubmittedAt: new Date(),
      renterPrivateMessage: privateMessage
    });

    // Check and update visibility
    const updatedRental = await checkAndUpdateReviewVisibility(rental);

    res.json({
      success: true,
      reviewVisible: updatedRental.renterReviewVisible
    });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

// Renter reviews item
router.post('/:id/review-item', authenticateToken, async (req, res) => {
  try {
    const { rating, review, privateMessage } = req.body;
    const rental = await Rental.findByPk(req.params.id);

    if (!rental) {
      return res.status(404).json({ error: 'Rental not found' });
    }

    if (rental.renterId !== req.user.id) {
      return res.status(403).json({ error: 'Only renters can review items' });
    }

    if (rental.status !== 'completed') {
      return res.status(400).json({ error: 'Can only review completed rentals' });
    }

    if (rental.itemReviewSubmittedAt) {
      return res.status(400).json({ error: 'Item review already submitted' });
    }

    // Submit the review and private message
    await rental.update({ 
      itemRating: rating, 
      itemReview: review,
      itemReviewSubmittedAt: new Date(),
      itemPrivateMessage: privateMessage
    });

    // Check and update visibility
    const updatedRental = await checkAndUpdateReviewVisibility(rental);

    res.json({
      success: true,
      reviewVisible: updatedRental.itemReviewVisible
    });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

// Mark rental as completed (owner only)
router.post('/:id/mark-completed', authenticateToken, async (req, res) => {
  try {
    console.log('Mark completed endpoint hit for rental ID:', req.params.id);
    const rental = await Rental.findByPk(req.params.id);

    if (!rental) {
      return res.status(404).json({ error: 'Rental not found' });
    }

    if (rental.ownerId !== req.user.id) {
      return res.status(403).json({ error: 'Only owners can mark rentals as completed' });
    }

    if (!['active', 'confirmed'].includes(rental.status)) {
      return res.status(400).json({ error: 'Can only mark active or confirmed rentals as completed' });
    }

    await rental.update({ status: 'completed' });

    const updatedRental = await Rental.findByPk(rental.id, {
      include: [
        { model: Item, as: 'item' },
        { model: User, as: 'owner', attributes: ['id', 'username', 'firstName', 'lastName'] },
        { model: User, as: 'renter', attributes: ['id', 'username', 'firstName', 'lastName'] }
      ]
    });

    res.json(updatedRental);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

// Legacy review endpoint (for backward compatibility)
router.post('/:id/review', authenticateToken, async (req, res) => {
  try {
    const { rating, review } = req.body;
    const rental = await Rental.findByPk(req.params.id);

    if (!rental) {
      return res.status(404).json({ error: 'Rental not found' });
    }

    if (rental.renterId !== req.user.id) {
      return res.status(403).json({ error: 'Only renters can leave reviews' });
    }

    if (rental.status !== 'completed') {
      return res.status(400).json({ error: 'Can only review completed rentals' });
    }

    await rental.update({ rating, review });

    res.json(rental);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

module.exports = router;