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const User = require('../models/User');

const updateProfile = async (req, res) => {
    try {
        const { firstName, lastName, bio, specialty, price, address, experience } = req.body;
        const user = await User.findById(req.user._id);

        if (user) {
            user.firstName = firstName || user.firstName;
            user.lastName = lastName || user.lastName;
            user.bio = bio || user.bio;
            user.specialty = specialty || user.specialty;
            user.price = price !== undefined ? price : user.price;
            user.address = address || user.address;
            user.experience = experience !== undefined ? experience : user.experience;

            const updatedUser = await user.save();

            res.json({
                _id: updatedUser._id,
                email: updatedUser.email,
                role: updatedUser.role,
                firstName: updatedUser.firstName,
                lastName: updatedUser.lastName,
                bio: updatedUser.bio,
                specialty: updatedUser.specialty,
                price: updatedUser.price,
                portfolio: updatedUser.portfolio,
                address: updatedUser.address,
                experience: updatedUser.experience,
                availability: updatedUser.availability
            });
        } else {
            res.status(404).json({ message: 'User not found' });
        }
    } catch (error) {
        res.status(500).json({ message: error.message });
    }
};

const updateAvailability = async (req, res) => {
    try {
        const { availability } = req.body;
        const user = await User.findById(req.user._id);

        if (user) {
            user.availability = availability;
            await user.save();
            res.json(user.availability);
        } else {
            res.status(404).json({ message: 'User not found' });
        }
    } catch (error) {
        res.status(500).json({ message: error.message });
    }
};

const addPortfolioItem = async (req, res) => {
    try {
        const { imageUrl, type } = req.body;
        const user = await User.findById(req.user._id);

        if (user) {
            user.portfolio.push({ url: imageUrl, type: type || 'image' });
            await user.save();
            res.json(user.portfolio);
        } else {
            res.status(404).json({ message: 'User not found' });
        }
    } catch (error) {
        res.status(500).json({ message: error.message });
    }
};

const removePortfolioItem = async (req, res) => {
    try {
        const { imageUrl } = req.body;
        const user = await User.findById(req.user._id);

        if (user) {
            user.portfolio = user.portfolio.filter(item => item.url !== imageUrl);
            await user.save();
            res.json(user.portfolio);
        } else {
            res.status(404).json({ message: 'User not found' });
        }
    } catch (error) {
        res.status(500).json({ message: error.message });
    }
};

const getPhotographerById = async (req, res) => {
    try {
        const user = await User.findById(req.params.id).select('-password');
        if (user && (user.role === 'photographer' || (user.roles && user.roles.includes('photographer')))) {
            res.json(user);
        } else {
            res.status(404).json({ message: 'Photographer not found' });
        }
    } catch (error) {
        res.status(500).json({ message: error.message });
    }
};

const getPhotographers = async (req, res) => {
    try {
        const query = req.query.q;
        // photographer filter: primary role OR in roles array (dual-role support)
        const photographerFilter = {
            $or: [{ role: 'photographer' }, { roles: 'photographer' }]
        };
        let pgs;
        if (query) {
            pgs = await User.find({
                ...photographerFilter,
                $or: [
                    { firstName: { $regex: query, $options: 'i' } },
                    { lastName: { $regex: query, $options: 'i' } },
                    { specialty: { $regex: query, $options: 'i' } },
                    { address: { $regex: query, $options: 'i' } }
                ]
            }).select('-password').sort({ recommendationScore: -1, rating: -1 });
        } else {
            pgs = await User.find(photographerFilter).select('-password').sort({ recommendationScore: -1, rating: -1 });
        }
        res.json(pgs);
    } catch (error) {
        res.status(500).json({ message: error.message });
    }
};

const getNearbyPhotographers = async (req, res) => {
    try {
        const { lat, lng, radius = 5000 } = req.query; // radius in meters
        if (!lat || !lng) {
            return res.status(400).json({ message: 'Latitude and longitude are required' });
        }

        const photographers = await User.find({
            role: 'photographer',
            location: {
                $near: {
                    $geometry: {
                        type: 'Point',
                        coordinates: [parseFloat(lng), parseFloat(lat)]
                    },
                    $maxDistance: parseInt(radius)
                }
            }
        }).select('-password');

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

const getUserById = async (req, res) => {
    try {
        const user = await User.findById(req.params.id)
            .select('firstName lastName profilePicture role bio specialty price experience address portfolio');
        if (user) {
            res.json(user);
        } else {
            res.status(404).json({ message: 'User not found' });
        }
    } catch (error) {
        res.status(500).json({ message: error.message });
    }
};

module.exports = {
    updateProfile,
    addPortfolioItem,
    removePortfolioItem,
    getPhotographerById,
    getPhotographers,
    updateAvailability,
    getNearbyPhotographers,
    getUserById
};