from flask import Blueprint, render_template, redirect, url_for, request, flash
from werkzeug.security import generate_password_hash, check_password_hash
from flask_login import current_user, login_user, logout_user

from .models import User
from . import db

auth = Blueprint("auth", __name__)


@auth.route("/login", methods=["GET", "POST"])
def login():

    if current_user.is_authenticated:
        return redirect(url_for("main.index"))

    elif request.method == "GET":
        return render_template("login.html")

    elif request.method == "POST":
        email = request.form.get("email")
        password = request.form.get("password")
        remember = True if request.form.get("remember") else False

        user = User.query.filter_by(email=email).first()

        if not user or not check_password_hash(user.password, password):
            flash("Please check your login details and try again.")
            return redirect(url_for("auth.login"))

        login_user(user, remember=remember)
        return redirect(url_for("main.profile"))


@auth.route("/signup", methods=["GET", "POST"])
def signup():

    if current_user.is_authenticated:
        return redirect(url_for("main.index"))

    elif request.method == "GET":
        return render_template("signup.html")

    elif request.method == "POST":
        email = request.form.get("email")
        name = request.form.get("name")
        password = request.form.get("password")

        user = User.query.filter_by(email=email).first()

        if user:
            flash("Email address already exists")
            return redirect(url_for("auth.signup"))

        new_user = User(
            email=email,
            name=name,
            password=generate_password_hash(password, method="sha256"),
        )

        db.session.add(new_user)
        db.session.commit()

        return redirect(url_for("auth.login"))


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