from flask import render_template, request, redirect, url_for
from flask_login import login_user, login_required, logout_user, current_user
from app import app, db, bcrypt, login_manager
from models import User, Listing, Booking, Image, Document, Amenities
from datetime import datetime
from utils import generate_password, send_email, save_document

@login_manager.user_loader
def load_user(user_id):
    return User.query.get(int(user_id))

@app.route('/')
def home():
    page = request.args.get('page', 1, type=int)
    per_page = 10
    property_type = request.args.get('property_type')
    
    query = Listing.query
    if property_type:
        query = query.filter_by(property_type=property_type)
    
    listings = query.paginate(page=page, per_page=per_page)
    return render_template('index.html', listings=listings)

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        email = request.form['email']
        password = request.form['password']
        user = User.query.filter_by(email=email).first()
        if user and bcrypt.check_password_hash(user.password, password):
            login_user(user)
            return redirect(url_for('upload_document'))
    return render_template('login.html')

@app.route('/logout/')
@login_required
def logout():
    logout_user()
    return redirect(url_for('login'))

@app.route('/register', methods=['GET', 'POST'])
def register():
    if request.method == 'POST':
        email = request.form['email']
        password_plain = generate_password()
        password = bcrypt.generate_password_hash(password_plain).decode('utf-8')
        phone = request.form['phone']
        user = User(email=email, password=password, phone=phone)
        db.session.add(user)
        db.session.commit()
        send_email(email, 'Your Account Password', f'Your password is: {password_plain}')
        login_user(user)
        return redirect(url_for('upload_document'))
    return render_template('register.html')

@app.route('/upload-document', methods=['GET', 'POST'])
@login_required
def upload_document():
    document = Document.query.filter_by(user_id=current_user.id).first()
    if document:
        if not document.verified:
            return render_template('upload_document.html', message="Your document is under verification.")
        return redirect(url_for('dashboard'))

    if request.method == 'POST':
        file = request.files['document']
        if not file:
            return render_template('upload_document.html', message="No file selected.")

        try:
            saved_filename = save_document(file, 'documents')
            new_document = Document(filename=saved_filename, user_id=current_user.id)
            db.session.add(new_document)
            db.session.commit()
            return redirect(url_for('upload_document'))
        except ValueError as e:
            return render_template('upload_document.html', message=str(e))

    return render_template('upload_document.html', message=None)

@app.route('/verify-document/<int:document_id>', methods=['POST'])
@login_required
def verify_document(document_id):
    if current_user.is_host:
        document = Document.query.get_or_404(document_id)
        document.verified = True
        db.session.commit()
        return redirect(url_for('dashboard'))
    return redirect(url_for('home'))

@app.route('/dashboard', methods=['GET', 'POST'])
@login_required
def dashboard():
    if current_user.is_host:
        listings = Listing.query.filter_by(host_id=current_user.id).all()
        users = User.query.all()
        documents = {doc.user_id: doc for doc in Document.query.all()}
        return render_template('dashboard.html', listings=listings, users=users, documents=documents)
    return redirect(url_for('home'))

@app.route('/create-listing', methods=['GET', 'POST'])
@login_required
def create_listing():
    if not current_user.is_host:
        return redirect(url_for('home'))

    amenities_list = Amenities.query.all()
    if request.method == 'POST':
        title = request.form['title']
        description = request.form['description']
        price = request.form['price']
        location = request.form['location']
        property_type = request.form['property_type']
        latitude = request.form.get('latitude')
        longitude = request.form.get('longitude')
        guests = request.form['guests']
        rooms = request.form['rooms']
        beds = request.form['beds']
        bathrooms = request.form['bathrooms']
        selected_amenities = request.form.getlist('amenities')
        listing = Listing(title=title, 
                          description=description, 
                          price=price, 
                          location=location, 
                          property_type=property_type, 
                          host_id=current_user.id, 
                          latitude=latitude, longitude=longitude, 
                          guests=guests,
                          rooms=rooms, beds=beds, bathrooms=bathrooms)
        for amenity_id in selected_amenities:
            amenity = Amenities.query.get(int(amenity_id))
            if amenity:
                listing.amenities.append(amenity)
        db.session.add(listing)
        db.session.flush()

        image_urls = request.form.getlist('images')
        for url in image_urls:
            image = Image(url=url, listing_id=listing.id)
            db.session.add(image)

        db.session.commit()
        return redirect(url_for('dashboard'))
    return render_template('create_listing.html', property_types=Listing.PROPERTY_TYPES, amenities_list=amenities_list)

@app.route('/edit-listing/<int:listing_id>', methods=['GET', 'POST'])
@login_required
def edit_listing(listing_id):
    listing = Listing.query.get_or_404(listing_id)
    if listing.host_id != current_user.id:
        return redirect(url_for('dashboard'))

    amenities_list = Amenities.query.all()
    selected_amenities = [amenity.id for amenity in listing.amenities]

    if request.method == 'POST':
        title = request.form['title']
        description = request.form['description']
        price = request.form['price']
        location = request.form['location']
        property_type = request.form['property_type']
        latitude = request.form.get('latitude')
        longitude = request.form.get('longitude')
        guests = request.form['guests']
        rooms = request.form['rooms']
        beds = request.form['beds']
        bathrooms = request.form['bathrooms']
        selected_amenities_ids = request.form.getlist('amenities')

        listing.title = title
        listing.description = description
        listing.price = price
        listing.location = location
        listing.property_type = property_type
        listing.latitude = latitude
        listing.longitude = longitude
        listing.guests = guests
        listing.rooms = rooms
        listing.beds = beds
        listing.bathrooms = bathrooms

        listing.amenities = []

        for amenity_id in selected_amenities_ids:
            amenity = Amenities.query.get(int(amenity_id))
            if amenity:
                listing.amenities.append(amenity)

        db.session.commit()
        return redirect(url_for('dashboard'))

    return render_template('edit_listing.html', listing=listing, amenities_list=amenities_list, selected_amenities=selected_amenities)

@app.route('/booking/<int:listing_id>', methods=['GET', 'POST'])
@login_required
def booking(listing_id):
    listing = Listing.query.get_or_404(listing_id)
    booked_dates = Booking.query.filter_by(listing_id=listing_id).all()
    unavailable_dates = [(booking.check_in.strftime('%Y-%m-%d'), booking.check_out.strftime('%Y-%m-%d')) for booking in booked_dates]

    if request.method == 'POST':
        check_in = datetime.strptime(request.form['check_in'], '%Y-%m-%d')
        check_out = datetime.strptime(request.form['check_out'], '%Y-%m-%d')

        for start_date, end_date in unavailable_dates:
            if (check_in.strftime('%Y-%m-%d') >= start_date and check_in.strftime('%Y-%m-%d') <= end_date) or \
               (check_out.strftime('%Y-%m-%d') >= start_date and check_out.strftime('%Y-%m-%d') <= end_date):
                return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates, error="Selected dates are not available.")
        try:
            check_in = datetime.strptime(request.form['check_in'], '%Y-%m-%d')
            check_out = datetime.strptime(request.form['check_out'], '%Y-%m-%d')

            if check_out <= check_in:
                return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates, error="Check-out date must be after check-in date.")

            guests = int(request.form['guests'])
            if guests > listing.guests:
                return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates, error="Number of guests exceeds maximum allowed.")

            booking = Booking(user_id=current_user.id, listing_id=listing_id, check_in=check_in, check_out=check_out, guests=guests)
            db.session.add(booking)
            db.session.commit()
            return redirect(url_for('home'))

        except ValueError:
            return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates, error="Invalid date format.")

    return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates)

@app.route('/view/<int:listing_id>', methods=['GET'])
def view_listing(listing_id):
    listing = Listing.query.get_or_404(listing_id)
    property_type_display = Listing.PROPERTY_TYPES.get(listing.property_type, 'Unknown')
    amenities = list(listing.amenities)
    return render_template('view.html', listing=listing, property_type_display=property_type_display, amenities=amenities)