#!/usr/bin/env python3

"Main Haldis script"
import logging
from logging.handlers import TimedRotatingFileHandler
import typing
from datetime import datetime

from airbrake import Airbrake, AirbrakeHandler
from flask import Flask, render_template
from flask_bootstrap import Bootstrap, StaticCDN
from flask_debugtoolbar import DebugToolbarExtension
from flask_login import LoginManager
from flask_migrate import Migrate, MigrateCommand
from flask_oauthlib.client import OAuth, OAuthException
from flask_script import Manager, Server
from markupsafe import Markup

from login import init_login
from models import db
from models.anonymous_user import AnonymouseUser
from utils import euro_string, price_range_string
from zeus import init_oauth


def register_plugins(app: Flask) -> Manager:
    "Register Airbrake and logrotation plugins"
    # pylint: disable=W0612
    if not app.debug:
        timedFileHandler = TimedRotatingFileHandler(
            app.config["LOGFILE"], when="midnight", backupCount=100
        )
        timedFileHandler.setLevel(logging.DEBUG)

        loglogger = logging.getLogger("werkzeug")
        loglogger.setLevel(logging.DEBUG)
        loglogger.addHandler(timedFileHandler)
        app.logger.addHandler(timedFileHandler)

        airbrakelogger = logging.getLogger("airbrake")

        # Airbrake
        airbrake = Airbrake(project_id=app.config["AIRBRAKE_ID"],
                            api_key=app.config["AIRBRAKE_KEY"])
        # ugly hack to make this work for out errbit
        airbrake._api_url = "http://errbit.awesomepeople.tv/api/v3/projects/{}/notices".format(  # pylint: disable=W0212
            airbrake.project_id
        )

        airbrakelogger.addHandler(AirbrakeHandler(airbrake=airbrake))
        app.logger.addHandler(AirbrakeHandler(airbrake=airbrake))

    # Initialize SQLAlchemy
    db.init_app(app)

    # Initialize Flask-Migrate
    migrate = Migrate(app, db)
    app_manager = Manager(app)
    app_manager.add_command("db", MigrateCommand)
    app_manager.add_command("runserver", Server(port=8000))

    # Init login manager
    login_manager = LoginManager()
    login_manager.init_app(app)
    login_manager.anonymous_user = AnonymouseUser
    init_login(app)

    # Add oauth
    zeus = init_oauth(app)
    app.zeus = zeus

    # Load the bootstrap local cdn
    Bootstrap(app)
    app.config["BOOTSTRAP_SERVE_LOCAL"] = True

    # use our own bootstrap theme
    app.extensions["bootstrap"]["cdns"]["bootstrap"] = StaticCDN()

    # Load the flask debug toolbar
    toolbar = DebugToolbarExtension(app)

    # Make cookies more secure
    app.config.update(
        SESSION_COOKIE_HTTPONLY=True,
        SESSION_COOKIE_SAMESITE='Lax',
    )

    if not app.debug:
        app.config.update(SESSION_COOKIE_SECURE=True)

    return app_manager


def add_handlers(app: Flask) -> None:
    "Add handlers for 4xx error codes"
    # pylint: disable=W0612,W0613
    @app.errorhandler(404)
    def handle404(e) -> typing.Tuple[str, int]:
        return render_template("errors/404.html"), 404

    @app.errorhandler(401)
    def handle401(e) -> typing.Tuple[str, int]:
        return render_template("errors/401.html"), 401


def add_routes(application: Flask) -> None:
    "Add all routes to Haldis"
    # import views  # TODO convert to blueprint
    # import views.stats  # TODO convert to blueprint

    from views.order import order_bp
    from views.general import general_bp
    from views.stats import stats_blueprint
    from views.debug import debug_bp
    from login import auth_bp
    from zeus import oauth_bp

    application.register_blueprint(general_bp, url_prefix="/")
    application.register_blueprint(order_bp, url_prefix="/order")
    application.register_blueprint(stats_blueprint, url_prefix="/stats")
    application.register_blueprint(auth_bp, url_prefix="/")
    application.register_blueprint(oauth_bp, url_prefix="/")

    if application.debug:
        application.register_blueprint(debug_bp, url_prefix="/debug")


def add_template_filters(app: Flask) -> None:
    "Add functions which can be used in the templates"
    # pylint: disable=W0612
    @app.template_filter("countdown")
    def countdown(value, only_positive: bool = True,
                  show_text: bool = True, reload: bool = True) -> str:
        delta = int(value.timestamp() - datetime.now().timestamp())
        if delta < 0 and only_positive:
            text = "closed"
        else:
            carry, seconds = divmod(delta, 60)
            carry, minutes = divmod(carry, 60)
            days, hours    = divmod(carry, 24)

            days_text = f"{days} days, " if days else ""

            appendix = " left" if show_text else ""
            text = f"{days_text}{hours:02d}:{minutes:02d}:{seconds:02d}{appendix}"

        reload_str = "yes" if reload else "no"

        return Markup(f"<span class='time' data-seconds='{delta}' data-reload='{reload_str}'>" +
                      text + "</span>")

    @app.template_filter("year")
    def current_year(_value: typing.Any) -> str:
        return str(datetime.now().year)

    app.template_filter("euro")(euro_string)
    app.template_filter("price_range")(price_range_string)
    app.template_filter("any")(any)


app = Flask(__name__)

# Load the config file
app.config.from_object("config.Configuration")

app_manager = register_plugins(app)
add_handlers(app)
add_routes(app)
add_template_filters(app)


# For usage when you directly call the script with python
if __name__ == "__main__":
    app_manager.run()