from flask import Flask, render_template, redirect, request, session, url_for, g
from flask_sqlalchemy import SQLAlchemy
from flask_admin import Admin, AdminIndexView, expose, BaseView
from flask_admin.contrib.sqla import ModelView
from functools import wraps

app = Flask(__name__)
app.secret_key = 'bebra'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///Picture_Puzzle_web.db'
db = SQLAlchemy(app)

class User(db.Model):
    __tablename__ = 'user'
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(100), unique=True, nullable=False)
    password = db.Column(db.String(100), nullable=False)
    email = db.Column(db.String(100), unique=True, nullable=False)

class Post(db.Model):
    __tablename__ = 'post'
    id = db.Column(db.Integer, primary_key=True)
    date_created = db.Column(db.String(100), unique=False, nullable=False)
    alias = db.Column(db.String(100), unique=True, nullable=False)
    title = db.Column(db.String(100), nullable=False)
    image = db.Column(db.String(100), nullable=False)
    
class ForumCategory(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    category_name = db.Column(db.String(100), nullable=False)
    description = db.Column(db.String(200))

class ForumPost(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    category_id = db.Column(db.Integer, db.ForeignKey('forum_category.id'), nullable=False)
    post_name = db.Column(db.String(100), nullable=False)
    created_by = db.Column(db.String(100), nullable=False)
    creation_date = db.Column(db.DateTime, nullable=False)
    media = db.Column(db.String(100))
    text = db.Column(db.Text, nullable=False)
    edited = db.Column(db.Boolean, default=False)

class ForumComment(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    post_id = db.Column(db.Integer, db.ForeignKey('forum_post.id'), nullable=False)
    created_by = db.Column(db.String(100), nullable=False)
    creation_date = db.Column(db.DateTime, nullable=False)
    media = db.Column(db.String(100))
    text = db.Column(db.Text, nullable=False)
    edited = db.Column(db.Boolean, default=False)

def admin_login_required(view_func):
    @wraps(view_func)
    def decorated_function(*args, **kwargs):
        if not session.get('admin_logged_in'):
            return redirect(url_for('admin_login'))
        return view_func(*args, **kwargs)
    return decorated_function

class MyAdminIndexView(AdminIndexView):
    @expose('/')
    @admin_login_required
    def index(self):
        return self.render('admin/index.html')

class UserAdminView(ModelView):
    column_exclude_list = ['password']
    form_excluded_columns = ['password']
    can_export = True
    export_types = ['csv']

class PostAdminView(ModelView):
    can_export = True
    export_types = ['csv']

class LogoutView(BaseView):
    @expose('/')
    def index(self):
        session.pop("admin_logged_in", None)
        return redirect(url_for("index"))

admin = Admin(app, name='Admin Panel', template_mode='bootstrap3', index_view=MyAdminIndexView())
admin.add_view(UserAdminView(User, db.session))
admin.add_view(PostAdminView(Post, db.session))
admin.add_view(LogoutView(name='Logout', endpoint='admin_logout'))

@app.before_request
def check_admin_login():
    if request.path.startswith('/admin/') and not session.get('admin_logged_in'):
        if request.path != '/admin/login' and request.path != '/admin/logout':
            return redirect(url_for('admin_login'))

ADMIN_USERNAME = 'user'
ADMIN_PASSWORD = '1234321'

@app.before_request
def before_request():
    g.user = None
    if 'username' in session:
        user = User.query.filter_by(username=session['username']).first()
        g.user = user

@app.route("/admin/login", methods=["GET", "POST"])
def admin_login():
    if request.method == "POST":
        username = request.form["username"]
        password = request.form["password"]
        if username == ADMIN_USERNAME and password == ADMIN_PASSWORD:
            session["admin_logged_in"] = True
            return redirect(url_for("admin.index"))
        else:
            return render_template("admin/login.html", error_msg="Invalid credentials")
    return render_template("admin/login.html", error_msg=None)

@app.route("/admin/logout")
def admin_logout():
    session.pop("admin_logged_in", None)
    return redirect(url_for("admin_login"))

@app.route("/register", methods=["GET", "POST"])
def register():
    if request.method == "POST":
        username = request.form["username"]
        email = request.form["email"]
        password = request.form["password"]

        existing_user = User.query.filter_by(email=email).first()
        if existing_user:
            error_msg = "Email already exists"
            return render_template("auth/register.html", error_msg=error_msg)

        existing_username = User.query.filter_by(username=username).first()
        if existing_username:
            error_msg = "Username already exists"
            return render_template("auth/register.html", error_msg=error_msg)

        new_user = User(username=username, email=email, password=password)  # type: ignore
        db.session.add(new_user)
        db.session.commit()
        return redirect(url_for("login"))

    return render_template("auth/register.html")

@app.route("/login", methods=["GET", "POST"])
def login():
    if request.method == "POST":
        username = request.form["username"]
        password = request.form["password"]
        user = User.query.filter_by(username=username, password=password).first()
        if user:
            session["username"] = username
            return redirect(url_for("index"))
    return render_template("auth/login.html")

@app.route("/logout")
def logout():
    session.pop("username", None)
    return redirect(url_for("index"))

@app.route("/")
def index():
    latest_posts = Post.query.all()[::-1]
    return render_template("index.html", latest_posts=latest_posts)

@app.route("/posts")
def all_posts():
    all_posts = Post.query.all()[::-1]
    return render_template("posts.html", posts=all_posts)

@app.route("/posts/<alias>")
def post(alias):
    post_info = Post.query.filter_by(alias=alias).first()
    if post_info:
        return render_template(f"{alias}.html", post_info=post_info)
    else:
        return "Post not found", 404
    
@app.route('/forums')
def forums():
    categories = ForumCategory.query.all()
    posts = ForumPost.query.all()
    comments = ForumComment.query.all()
    return render_template('forums.html', categories=categories, posts=posts, comments=comments)

@app.route('/forums/<int:category_id>')
def category(category_id):
    category = ForumCategory.query.get_or_404(category_id)
    posts = ForumPost.query.filter_by(category_id=category_id).all()
    return render_template('category.html', category=category, posts=posts)

@app.route('/forums/<int:post_id>')
def new_post(post_id):
    post = ForumPost.query.get_or_404(post_id)
    comments = ForumComment.query.filter_by(post_id=post_id).all()
    return render_template('post.html', post=post, comments=comments)

@app.route('/forums/create_post', methods=['GET', 'POST'])
def create_post():
    if request.method == 'POST':
        category_id = request.form['category_id']
        post_name = request.form['post_name']
        created_by = request.form['created_by']
        text = request.form['text']
        new_post = ForumPost(category_id=category_id, post_name=post_name, created_by=created_by, text=text) # type: ignore
        db.session.add(new_post)
        db.session.commit()
        return redirect(url_for('forums'))
    else:
        categories = ForumCategory.query.all()
        return render_template('create_post.html', categories=categories)

@app.route('/forums/create_comment', methods=['POST']) # type: ignore
def create_comment():
    if request.method == 'POST':
        post_id = request.form['post_id']
        created_by = request.form['created_by']
        text = request.form['text']
        new_comment = ForumComment(post_id=post_id, created_by=created_by, text=text) # type: ignore
        db.session.add(new_comment)
        db.session.commit()
        return redirect(url_for('post', post_id=post_id))

@app.route('/forums/upvote_post/<int:post_id>')
def upvote_post(post_id):
    post = ForumPost.query.get_or_404(post_id)
    post.upvotes += 1
    db.session.commit()
    return redirect(url_for('post', post_id=post_id))

@app.route('/forums/downvote_post/<int:post_id>')
def downvote_post(post_id):
    post = ForumPost.query.get_or_404(post_id)
    post.downvotes += 1
    db.session.commit()
    return redirect(url_for('post', post_id=post_id))

@app.route('/forums/upvote_comment/<int:comment_id>')
def upvote_comment(comment_id):
    comment = ForumComment.query.get_or_404(comment_id)
    comment.upvotes += 1
    db.session.commit()
    return redirect(url_for('post', post_id=comment.post_id))

@app.route('/forums/downvote_comment/<int:comment_id>')
def downvote_comment(comment_id):
    comment = ForumComment.query.get_or_404(comment_id)
    comment.downvotes += 1
    db.session.commit()
    return redirect(url_for('post', post_id=comment.post_id))

@app.route("/about")
def about():
    return render_template("about.html")

if __name__ == '__main__':
    app.run(debug=True)