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 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
import json
import qrcode
from io import BytesIO

@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('objective', objective_hash=objective.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)