import json
from datetime import datetime
from io import BytesIO
import qrcode
from flask import render_template, flash, redirect, url_for, request, abort, send_file
from flask_login import current_user, login_required
from sqlalchemy import and_

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

@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.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>/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.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.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(and_(User.name == username, User.games.contains(game))).first_or_404()
    gameplayer = [gameplayer for gameplayer in user.user_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('main.game_dashboard', game_name=game.name))
    return render_template('game_player.html', title=f'{user.name} in {game_name}', game=game, user=user, 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)