import hashlib
import os
from re import match

from flask import render_template, request, redirect, url_for
from flask_login import (
    LoginManager,
    login_user,
    login_required,
    logout_user,
    current_user,
)

import db_routing
from db_init import db_fill
from db_routing import app, db
from scenario_manager import Executor

login_manager = LoginManager(app)


@login_manager.user_loader
def load_user(user_id):
    return db_routing.get_user(id=user_id)


@app.route("/", methods=["GET"])
def index():
    return render_template("index.html")


@app.route("/registration", methods=["GET", "POST"])
def registration():
    if current_user.is_authenticated:
        return redirect(url_for("universal_error"))
    if request.method == "POST":
        userName = request.form["RegUserLogin"]
        userPassw = request.form["RegUserPassw"]
        if string_check(userName) and string_check(userPassw):
            if db_routing.add_user(userName, passw_hash(userPassw)):
                login_user(db_routing.get_user(username=userName))
                return redirect(url_for("workshop"))
    return render_template("registration.html")


@app.route("/login", methods=["POST"])
def login():
    userName = request.form["LogUserLogin"]
    userPassw = request.form["LogUserPassw"]
    if string_check(userName) and string_check(userPassw):
        user = verify_password(userName, userPassw)
        if user:
            login_user(user)
            return redirect(url_for("workshop"))
        else:
            return redirect(url_for("registration"))

    else:
        return redirect(url_for("registration"))


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


@app.route("/workshop", methods=["GET", "POST"])
@login_required
def workshop():
    if request.method == "POST":
        if "NewScenarioName" in request.form:
            newScenarioName = request.form["NewScenarioName"]
            triggerID = request.form["TriggerID"]
            triggerArgs = request.form["TriggerArgs"]
            actionID = request.form["ActionID"]
            actionArgs = request.form["ActionArgs"]
            new_scenario = db_routing.add_scenario(
                current_user.get_id(),
                newScenarioName,
                triggerID,
                triggerArgs,
                actionID,
                actionArgs,
            )
            activeScenario = Executor(new_scenario, current_user.get_tg_id())
            activeScenario.start()
            return redirect(url_for("workshop"))

        if "TGID" in request.form:
            new_tg_id = request.form["TGID"]
            db_routing.tg_id_update(current_user.get_id(), new_tg_id)
            return redirect(url_for("workshop"))

        if "ScenarioID" in request.form:
            scnarioID = request.form["ScenarioID"]
            db_routing.delete_scenario(scnarioID)
            return redirect(url_for("workshop"))

    triggers_list = db_routing.get_trigers()
    actions_list = db_routing.get_actions()
    user_scripts_list = db_routing.get_user_scripts(current_user.get_id())
    User = db_routing.get_user(id=current_user.get_id())
    if User:
        tg_id = User.tg_id
    else:
        tg_id = None
    return render_template(
        "workshop.html",
        triggers_list=triggers_list,
        actions_list=actions_list,
        user_scripts_list=user_scripts_list,
        tg_id=tg_id,
    )


@app.errorhandler(Exception)
def universal_error(error):
    return render_template("error.html"), 404


def string_check(string):
    if 2 < len(string) < 7:
        if match("^[0-9A-Za-z]*$", string) and not ("\\" in string):
            return True
    else:
        print(
            "Некорректный ввод! Строка должно включать только английские буквы"
            " или цифры. Содержать не менее 3 и не более 6 символов"
        )
        return False


def passw_hash(user_passw, salt=os.urandom(32)):
    key = hashlib.pbkdf2_hmac(
        "sha256", user_passw.encode("utf-8"), salt, 100000
    )
    storage = salt + key
    # salt_from_storage = storage[:32]  # 32 длина соли
    # key_from_storage = storage[32:]
    return storage


def verify_password(username, password):
    User = db_routing.get_user(username=username)
    if User:
        userSalt = User.password[:32]
        if passw_hash(password, userSalt) == User.password:
            return User
    else:
        print("Неверный пароль")
        return False


if __name__ == "__main__":
    if not os.path.exists("./data.db"):
        db.create_all()
        db_fill()
    app.run()