from flask import Flask, session
from dotenv import load_dotenv
from .models import Avatars, Users
from .auth import digest
from .routes.users import is_logged_in, get_active_user
from .constants import (
    PermissionLevel,
    InfoboxKind, InfoboxIcons, InfoboxHTMLClass
    )
from datetime import datetime
import os
import time
import secrets

def create_default_avatar():
    if Avatars.count() == 0:
        print("Creating default avatar reference")
        Avatars.create({
            "file_path": "/static/avatars/default.webp",
            "uploaded_at": int(time.time())
            })

def create_admin():
    username = "admin"
    if Users.count({"username": username}) == 0:
        print("!!!!!Creating admin account!!!!!")
        password_length = 16
        password = secrets.token_urlsafe(password_length)
        hashed = digest(password)
        Users.create({
            "username": username,
            "password_hash": hashed,
            "permission": PermissionLevel.ADMIN.value,
        })
        print(f"!!!!!Administrator account created, use '{username}' as the login and '{password}' as the password. This will only be shown once!!!!!")

def create_deleted_user():
    username = "DeletedUser"
    if Users.count({"username": username}) == 0:
        print("Creating DeletedUser")
        Users.create({
            "username": username,
            "password_hash": "",
            "permission": PermissionLevel.SYSTEM.value,
        })

def create_app():
    app = Flask(__name__)

    if os.getenv("PYROM_PROD") is None:
        app.static_folder = os.path.join(os.path.dirname(__file__), "../data/static")
        app.debug = True
        app.config["DB_PATH"] = "data/db/db.dev.sqlite"
        load_dotenv()
    else:
        app.config["DB_PATH"] = "data/db/db.prod.sqlite"

    app.config["SECRET_KEY"] = os.getenv("FLASK_SECRET_KEY")

    app.config['AVATAR_UPLOAD_PATH'] = 'data/static/avatars/'
    app.config['MAX_CONTENT_LENGTH'] = 1000 * 1000

    os.makedirs(os.path.dirname(app.config["DB_PATH"]), exist_ok = True)
    with app.app_context():
        from .schema import create as create_tables
        from .migrations import run_migrations
        create_tables()
        run_migrations()

        create_default_avatar()
        create_admin()
        create_deleted_user()

    from app.routes.app import bp as app_bp
    from app.routes.topics import bp as topics_bp
    from app.routes.threads import bp as threads_bp
    from app.routes.users import bp as users_bp
    from app.routes.mod import bp as mod_bp
    from app.routes.api import bp as api_bp
    app.register_blueprint(app_bp)
    app.register_blueprint(topics_bp)
    app.register_blueprint(threads_bp)
    app.register_blueprint(users_bp)
    app.register_blueprint(mod_bp)
    app.register_blueprint(api_bp)

    app.config['SESSION_COOKIE_SECURE'] = True

    @app.before_request
    def make_session_permanent():
        session.permanent = True

    commit = ""
    with open('.git/refs/heads/main') as f:
        commit = f.read().strip()

    @app.context_processor
    def inject_constants():
        return {
            "InfoboxIcons": InfoboxIcons,
            "InfoboxHTMLClass": InfoboxHTMLClass,
            "InfoboxKind": InfoboxKind,
            "__commit": commit,
        }

    @app.context_processor
    def inject_auth():
        return {"is_logged_in": is_logged_in, "get_active_user": get_active_user, "active_user": get_active_user()}

    @app.template_filter("ts_datetime")
    def ts_datetime(ts, format):
        return datetime.utcfromtimestamp(ts or int(time.time())).strftime(format)

    @app.template_filter("pluralize")
    def pluralize(number, singular = "", plural = "s"):
        if number == 1:
            return singular

        return plural

    return app