import fnmatch
import json
from os import listdir
from pathlib import Path
from datetime import datetime
from io import BytesIO
import qrcode
from flask import render_template, flash, redirect, url_for, request, abort, send_file, current_app, send_from_directory
from flask_login import current_user, login_required
from werkzeug.utils import secure_filename
from werkzeug.security import safe_join
from sqlalchemy import and_

from app import db
from app.main import bp
from app.models import User, Game, Role, GamePlayer, Objective, ObjectiveMinimalEncoder, LocationEncoder, PlayerCaughtPlayer
from app.main.forms import CreateGameForm, ObjectiveForm, PlayerAddForm, UserCreateForm, PlayerUpdateForm, CatchBunnyForm


import os

@bp.before_app_request
def before_request():
    if current_user.is_authenticated:
        current_user.last_login = datetime.utcnow()
        db.session.commit()

@bp.route('/')
@bp.route('/index')
@login_required
def index():
    if len(current_user.games) == 1:
        return redirect(url_for('main.game_dashboard', game_name=current_user.games[0].name))
    return render_template("index.html", title='Home')

@bp.route('/create_game', methods=['GET', 'POST'])
@login_required
def create_game():
    print(current_user.is_authenticated)
    form = CreateGameForm()
    if form.validate_on_submit():
        game = Game(name=form.game_name.data, start_time=form.start_time.data, end_time=form.end_time.data)
        game.players.append(GamePlayer(user=current_user, role=Role['owner']))
        db.session.add(game)
        db.session.commit()
        flash(f"'{game.name}' had been created!")
        return redirect(url_for('main.game_dashboard', game_name=game.name))
    return render_template('create_game.html', title='Create Game', form=form)

@bp.route('/game/<game_name>/delete')
@login_required
def delete_game(game_name):
    game = Game.query.filter_by(name=game_name).first_or_404()
    if not game.owned_by(current_user):
        abort(403)
    db.session.delete(game)
    for user in game.players:
        if not user.last_login:
            db.session.delete(user)
    db.session.commit()
    flash(f"Game '{game.name}' has been deleted!")
    return redirect(url_for('main.index'))

@bp.route('/game/<game_name>/dashboard')
@login_required
def game_dashboard(game_name):
    game = Game.query.filter_by(name=game_name).first_or_404()
    role = current_user.role_in_game(game)
    if role == Role.owner:
        return render_template('game_owner_dashboard.html', title='Game Dashboard',
        game=game, json=json, objective_encoder=ObjectiveMinimalEncoder, location_encoder=LocationEncoder)
    if role == Role.bunny:
        return render_template('game_bunny_dashboard.html', title='Game Dashboard',
        game=game, json=json, objective_encoder=ObjectiveMinimalEncoder, location_encoder=LocationEncoder)
    if role == Role.hunter:
        return render_template('game_hunter_dashboard.html', title='Game Dashboard',
        game=game, json=json, location_encoder=LocationEncoder)
    if role == Role.none:
        return render_template('game_hunter_dashboard.html', title='Game Dashboard',
        game=game, json=json, location_encoder=LocationEncoder)
    if role is None:
        abort(403)

@bp.route('/game/<game_name>/catch_bunny', methods=['GET', 'POST'])
@login_required
def catch_bunny(game_name):
    game = Game.query.filter_by(name=game_name).first_or_404()
    if current_user.role_in_game(game) is not Role.hunter:
        flash('Only hunters can catch bunnies!')
        abort(403)

    game_bunnies = game.bunnies()
    form = CatchBunnyForm()
    form.bunny.choices = [(player.user.id, player.user.name) for player in game_bunnies]

    if request.method == 'GET':
        parsed_bunny_name = request.args.get('bunny_name', default='', type=str)
        if parsed_bunny_name:
            bunny = [gameplayer for gameplayer in game_bunnies if gameplayer.user.name == parsed_bunny_name]
            if bunny:
                # pylint: disable=no-member
                form.bunny.default = bunny[0].user.id
                form.process()

    if form.validate_on_submit():
        bunny = [gameplayer for gameplayer in game_bunnies if gameplayer.user.id == form.bunny.data]
        if not bunny:
            flash('Please choose a bunny')
            return request.url
        bunny = bunny[0]

        pcp = PlayerCaughtPlayer(catching_player=current_user.player_in(game), caught_player=bunny, timestamp=datetime.utcnow())
        save_player_caught_player_photo(form.photo.data, game, pcp)
        db.session.add(pcp)
        db.session.commit()
        flash(f"You caught {bunny.user.name}! The submitted photo will be reviewed by a game owner.")
        return redirect(url_for('main.game_dashboard', game_name=game.name))
    return render_template('catch_bunny.html', title='Catch Bunny', form=form, game=game)

def save_player_caught_player_photo(file_storage, game, pcp):
    timestamp = pcp.timestamp.strftime('%Y%m%d%H%M%S')
    extension = Path(file_storage.filename).suffix
    filename = secure_filename(f'{timestamp}_{pcp.catching_player.user.name}_caught_{pcp.caught_player.user.name}{extension}')
    path = get_caught_bunny_photo_directory(game)
    path.mkdir(parents=True, exist_ok=True)
    file_storage.save(path / filename)

@bp.route('/game/<game_name>/caught_bunny_photo', methods=['GET'])
@login_required
def caught_bunny_photo(game_name):
    game = Game.query.filter_by(name=game_name).first_or_404()
    timestamp = request.args['timestamp']
    bunny_name = request.args['bunny_name']
    hunter_name = request.args['hunter_name']
    hunter = GamePlayer.query.join(User).filter(
        (GamePlayer.user_id == User.id) &
        (GamePlayer.game_id == game.id) &
        (User.name == hunter_name) &
        (GamePlayer.role == Role.hunter)).first_or_404()
    if not (game.owned_by(current_user) or current_user.player_in(game) == hunter):
        abort(403)
    directory = get_caught_bunny_photo_directory(game)
    filename = get_bunny_photo_filename(directory, timestamp, hunter_name, bunny_name)
    photo_path = safe_join(directory, filename)
    #TODO: Implement switch between serve self and serve by webserver
    return send_file(photo_path, conditional=True, as_attachment=False)

def get_bunny_photo_filename(directory, timestamp, hunter_name, bunny_name):
    filename = secure_filename(f'{timestamp}_{hunter_name}_caught_{bunny_name}') + '.*'
    matches = fnmatch.filter(listdir(directory), filename)
    return matches[0] if matches else ''

def get_caught_bunny_photo_directory(game):
    return Path(current_app.root_path).parent / \
                current_app.config['UPLOAD_FOLDER'] / \
                secure_filename(game.name) / \
                current_app.config['PLAYER_CAUGHT_PLAYER_PHOTO_DIR_NAME']


@bp.route('/game/<game_name>/adduser', methods=['GET', 'POST'])
@bp.route('/game/<game_name>/addplayer', methods=['GET', 'POST'])
@login_required
def add_player(game_name):
    game = Game.query.filter_by(name=game_name).first_or_404()
    if not game.owned_by(current_user):
        abort(403)
    form_add = PlayerAddForm()
    form_create = UserCreateForm()

    if form_add.submit_add.data and form_add.validate_on_submit():
        user = User.query.filter_by(name=form_add.name.data).first_or_404()
        game.players.append(GamePlayer(user=user, role=Role[form_create.role.data]))
        db.session.commit()
        return redirect(url_for('main.game_dashboard', game_name=game.name))

    if form_create.submit_create.data and form_create.validate_on_submit():
        user = User(name=form_create.name.data)
        user.set_auth_hash()
        game.players.append(GamePlayer(user=user, role=Role[form_create.role.data]))
        db.session.commit()
        return redirect(url_for('main.game_dashboard', game_name=game.name))

    return render_template('add_player.html', title=f'Add User for {game_name}', form_add=form_add, form_create=form_create, game=game)

@bp.route('/game/<game_name>/removeuser/<username>')
@bp.route('/game/<game_name>/removeplayer/<username>')
@login_required
def remove_player(game_name, username):
    game = Game.query.filter_by(name=game_name).first_or_404()
    if not game.owned_by(current_user):
        abort(403)
    user = User.query.filter(and_(User.name == username, User.games.contains(game))).first_or_404()
    game.players.remove(user)
    if not user.last_login:
        db.session.delete(user)
    db.session.commit()
    return redirect(url_for('main.game_dashboard', game_name=game.name))

@bp.route('/game/<game_name>/user/<username>', methods=['GET', 'POST'])
@bp.route('/game/<game_name>/player/<username>', methods=['GET', 'POST'])
@login_required
def game_player(game_name, username):
    game = Game.query.filter_by(name=game_name).first_or_404()
    if not game.owned_by(current_user):
        abort(403)
    user = User.query.filter((User.name == username) & (User.games.contains(game))).first_or_404()
    player = user.player_in(game)

    # pylint: disable=no-member
    form = PlayerUpdateForm(role=player.role.name)
    form.role.choices = [(role.value, role.name) for role in Role]
    form.role.default = player.role.value
    form.process()
    
    if form.validate_on_submit():
        player.role = Role[form.role.data]
        db.session.commit()
        return redirect(url_for('main.game_dashboard', game_name=game.name))
    return render_template('game_player.html', title=f'{user.name} in {game_name}', player=player, form=form, json=json, location_encoder=LocationEncoder)

@bp.route('/user/<auth_hash>/qrcode.png')
@login_required
def user_qrcode(auth_hash):
    user = User.query.filter_by(auth_hash=auth_hash).first_or_404()
    if not current_user.owns_game_played_by(user):
        abort(403)
    if user.last_login:
        flash('After a player has logged in, it is no longer possible to request their QR code.')
        abort(403)
    img = generate_qr_code(url_for('main.user', auth_hash=auth_hash, _external=True))
    return serve_pil_image(img)

@bp.route('/user/<auth_hash>')
@login_required
def user(auth_hash):
    user = User.query.filter_by(auth_hash=auth_hash).first_or_404()
    if user.password_hash:
        flash('Please login with your username and password!')
        abort(404)
    return render_template('auth/user.html', title=f'User: {user.name}', user=user)

@bp.route('/game/<game_name>/add_objective', methods=['GET', 'POST'])
@login_required
def add_objective(game_name):
    game = Game.query.filter_by(name=game_name).first_or_404()
    if not game.owned_by(current_user):
        abort(403)
    form = ObjectiveForm()
    objective = Objective(name='', latitude=52.0932, longitude=5.12405)
    if form.validate_on_submit():
        objective = Objective(name=form.objective_name.data, longitude=form.longitude.data, latitude=form.latitude.data)
        objective.set_hash()
        game.objectives.append(objective)
        db.session.commit()
        flash(f"Objective has been added!")
        return redirect(url_for('main.game_dashboard', game_name=game.name))
    return render_template('objective.html', title=f'Add Objective for {game_name}', form=form, objective=objective, owner=True)

@bp.route('/objective/<objective_hash>/delete', methods=['GET'])
@login_required
def delete_objective(objective_hash):
    objective = Objective.query.filter_by(hash=objective_hash).first_or_404()
    if not objective.owned_by(current_user):
        abort(403)
    else:
        db.session.delete(objective)
        db.session.commit()
    return redirect(url_for('main.game_dashboard', game_name=objective.game.name))

def generate_qr_code(url):
    qr = qrcode.QRCode(
        version=None,
        error_correction=qrcode.constants.ERROR_CORRECT_M,
        box_size=30,
        border=4,
    )
    qr.add_data(url)
    qr.make(fit=True)
    return qr.make_image(fill_color='black', back_color='white')

# Source: https://stackoverflow.com/questions/7877282/how-to-send-image-generated-by-pil-to-browser
def serve_pil_image(pil_img):
    img_io = BytesIO()
    pil_img.save(img_io, 'PNG', quality=70)
    img_io.seek(0)
    return send_file(img_io, mimetype='image/png')

@bp.route('/objective/<objective_hash>/qrcode.png')
@login_required
def objective_qrcode(objective_hash):
    objective = Objective.query.filter_by(hash=objective_hash).first_or_404()
    if not objective.owned_by(current_user):
        abort(403)
    img = generate_qr_code(url_for('main.objective', objective_hash=objective.hash, _external=True))
    return serve_pil_image(img)

@bp.route('/objective/<objective_hash>', methods=['GET', 'POST'])
@login_required
def objective(objective_hash):
    objective = Objective.query.filter_by(hash=objective_hash).first_or_404()
    owner = objective.owned_by(current_user)
    qrcode = generate_qr_code(objective) if owner else None
    form = ObjectiveForm()
    if form.submit.data and form.validate() and owner:
        objective.name = form.objective_name.data
        objective.longitude = form.longitude.data
        objective.latitude = form.latitude.data
        db.session.commit()
        return redirect(url_for('main.game_dashboard', game_name=objective.game.name))
    return render_template('objective.html', title='Objective view', objective=objective, owner=owner, form=form, qrcode=qrcode)