import json
import qrcode
from flask import render_template, flash, redirect, url_for, request, abort, send_file
from flask_login import login_user, logout_user, current_user, login_required
from sqlalchemy import and_
from io import BytesIO
from app import app, db
from app.models import Player, Game, Role, GamePlayer, Objective, ObjectiveMinimalEncoder, LocationEncoder
from app.forms import LoginForm, RegistrationForm, CreateGameForm, ObjectiveForm, PlayerAddForm, PlayerCreateForm, PlayerUpdateForm

@app.route('/')
@app.route('/index')
@login_required
def index():
    return render_template("index.html", title='Home')

@app.route('/login', methods=['GET', 'POST'])
def login():
    if current_user.is_authenticated:
        return redirect(url_for('index'))
    form = LoginForm()
    if form.validate_on_submit():
        player = Player.query.filter_by(name=form.username.data).first()
        if player is None or not player.check_password(form.password.data):
            flash('Invalid username or password')
            return redirect(url_for('login'))
        login_user(player, remember=form.remember_me.data)
        return redirect(url_for('index'))
    return render_template('login.html', title='Sign In', form=form)

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

@app.route('/register', methods=['GET', 'POST'])
def register():
    if current_user.is_authenticated:
        return redirect(url_for('index'))
    form = RegistrationForm()
    if form.validate_on_submit():
        player = Player(name=form.username.data)
        player.set_password(form.password.data)
        player.set_auth_hash()
        db.session.add(player)
        db.session.commit()
        flash('Congratulations, you are now a registered user!')
        return redirect(url_for('login'))
    return render_template('register.html', title='Register', form=form)

@app.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.game_players.append(GamePlayer(player=current_user, role=Role['owner'])) #check if this works, otherwise use 'owner'
        db.session.add(game)
        db.session.commit()
        flash(f"'{game.name}' had been created!")
        return redirect(url_for('game_dashboard', game_name=game.name))
    return render_template('create_game.html', title='Create Game', form=form)

@app.route('/game/<game_name>/dashboard')
@login_required
def game_dashboard(game_name):
    #game = Game.query.filter(Game.game_players.any(and_(GamePlayer.player.has(Player.name == current_user.name), GamePlayer.role == 'owner'))).first_or_404()
    game = Game.query.filter_by(name=game_name).first_or_404()
    if not is_game_owner(game): 
        abort(403)
    return render_template('game_dashboard.html', title = 'Game Dashboard', game=game, json=json, objective_encoder=ObjectiveMinimalEncoder, location_encoder=LocationEncoder)

@app.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 is_game_owner(game): 
        abort(403)
    form_add = PlayerAddForm()
    form_create = PlayerCreateForm()

    if form_add.submit_add.data and form_add.validate_on_submit():
        player = Player.query.filter_by(form_add.name.data).first_or_404()
        game.game_players.append(GamePlayer(player=player, role=Role[form_create.role.data]))
        return redirect(url_for('game_dashboard', game_name=game.name))

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

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

@app.route('/game/<game_name>/removeplayer/<player_name>')
@login_required
def remove_player(game_name, player_name):
    game = Game.query.filter_by(name=game_name).first_or_404()
    if not is_game_owner(game): 
        abort(403)
    player = Player.query.filter(and_(Player.name == player_name, Player.games.contains(game))).first_or_404()
    game.players.remove(player)
    db.session.commit()
    return redirect(url_for('game_dashboard', game_name=game.name))

@app.route('/game/<game_name>/player/<player_name>', methods=['GET', 'POST'])
@login_required
def game_player(game_name, player_name):
    game = Game.query.filter_by(name=game_name).first_or_404()
    if not is_game_owner(game): 
        abort(403)
    player = Player.query.filter(and_(Player.name == player_name, Player.games.contains(game))).first_or_404()
    gameplayer = [gameplayer for gameplayer in player.player_games if gameplayer.game == game][0]
    form = PlayerUpdateForm(role=gameplayer.role.name)
    if form.validate_on_submit():
        gameplayer.role = Role[form.role.data]
        db.session.commit()
        return redirect(url_for('game_dashboard', game_name=game.name))
    return render_template('player.html', title=f'{player.name} in {game_name}', game=game, player=player, form=form, json=json, location_encoder=LocationEncoder)

@app.route('/player/<auth_hash>/qrcode.png')
@login_required
def player_qrcode(auth_hash):
    player = Player.query.filter_by(auth_hash=auth_hash).first_or_404()
    if not is_player_game_owner(player): 
        abort(403)
    img = generate_qr_code(url_for('player', auth_hash=auth_hash, _external=True))
    return serve_pil_image(img)

def is_game_owner(game):
    return current_user in [gameplayer.player for gameplayer in game.game_players if gameplayer.role == Role.owner]

def is_player_game_owner(player):
    return current_user in [gameplayer.player for gameplayer in [game for game in player.games ].game_players if game_player.role == Role.owner]

def is_objective_owner(objective):
    return current_user in [gameplayer.player for gameplayer in objective.game.game_players if gameplayer.role == Role.owner]

@app.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 is_game_owner(game):
        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('game_dashboard', game_name=game.name))
    return render_template('objective.html', title=f'Add Objective for {game_name}', form=form, objective=objective, owner=True)

@app.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 is_objective_owner(objective):
        abort(403)
    if is_objective_owner(objective):
        db.session.delete(objective)
        db.session.commit()
    return redirect(url_for('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')

@app.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 is_objective_owner(objective):
        abort(403)
    img = generate_qr_code(url_for('objective', objective_hash=objective.hash, _external=True))
    return serve_pil_image(img)

@app.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 = is_objective_owner(objective)
    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('game_dashboard', game_name=objective.game.name))
    return render_template('objective.html', title='Objective view', objective=objective, owner=owner, form=form, qrcode=qrcode)