from flask import Blueprint, render_template, redirect, url_for, flash, request
from flask_login import login_required, current_user
from extensions import db, hash_password
from models import User, ROLES, ESPORT_GAMES

users_bp = Blueprint('users', __name__, url_prefix='/users')

@users_bp.route('')
@login_required
def list_users():
    if current_user.role != 'president':
        flash('Only the president can manage users.', 'danger')
        return redirect(url_for('main.dashboard'))

    users = User.query.order_by(User.role, User.full_name).all()
    return render_template('pages/users.html', users=users, roles=ROLES)

@users_bp.route('/<int:user_id>/edit', methods=['GET', 'POST'])
@login_required
def edit_user(user_id):
    if current_user.role != 'president':
        flash('Only the president can edit users.', 'danger')
        return redirect(url_for('main.dashboard'))

    user = User.query.get_or_404(user_id)

    if request.method == 'POST':
        full_name = request.form.get('full_name')
        email = request.form.get('email')
        phone = request.form.get('phone')
        role = request.form.get('role')
        is_active = request.form.get('is_active_account') == 'on'

        if role not in ROLES:
            flash('Invalid role selected.', 'danger')
            return render_template('pages/edit_user.html', user=user, roles=ROLES, esport_games=ESPORT_GAMES)

        # E-Sports fields
        selected_games = request.form.getlist('games')
        trn_username = request.form.get('trn_username', '').strip()
        discord_username = request.form.get('discord_username', '').strip()
        league_os_profile = request.form.get('league_os_profile', '').strip()

        user.full_name = full_name
        user.email = email
        user.phone = phone
        user.role = role
        user.is_active_account = is_active
        user.games = ','.join(selected_games) if selected_games else None
        user.trn_username = trn_username or None
        user.discord_username = discord_username or None
        user.league_os_profile = league_os_profile or None

        password = request.form.get('password')
        if password:
            user.password_hash = hash_password(password)

        db.session.commit()
        flash(f'User {user.full_name} updated successfully!', 'success')
        return redirect(url_for('users.list_users'))

    return render_template('pages/edit_user.html', user=user, roles=ROLES, esport_games=ESPORT_GAMES)

@users_bp.route('/<int:user_id>/delete', methods=['POST'])
@login_required
def delete_user(user_id):
    if current_user.role != 'president':
        flash('Only the president can delete users.', 'danger')
        return redirect(url_for('main.dashboard'))

    if current_user.id == user_id:
        flash('You cannot delete your own account.', 'danger')
        return redirect(url_for('users.list_users'))

    user = User.query.get_or_404(user_id)
    db.session.delete(user)
    db.session.commit()
    flash(f'User {user.full_name} has been removed.', 'success')
    return redirect(url_for('users.list_users'))

@users_bp.route('/create', methods=['GET', 'POST'])
@login_required
def create_user():
    if current_user.role != 'president':
        flash('Only the president can create users.', 'danger')
        return redirect(url_for('main.dashboard'))

    if request.method == 'POST':
        username = request.form.get('username')
        email = request.form.get('email')
        password = request.form.get('password')
        full_name = request.form.get('full_name')
        phone = request.form.get('phone')
        role = request.form.get('role')

        if role not in ROLES:
            flash('Invalid role selected.', 'danger')
            return render_template('pages/create_user.html', roles=ROLES)

        if User.query.filter_by(username=username).first():
            flash('Username already exists.', 'danger')
            return render_template('pages/create_user.html', roles=ROLES)

        if User.query.filter_by(email=email).first():
            flash('Email already registered.', 'danger')
            return render_template('pages/create_user.html', roles=ROLES)

        hashed_password = hash_password(password)
        user = User(
            username=username,
            password_hash=hashed_password,
            role=role,
            full_name=full_name,
            email=email,
            phone=phone
        )
        db.session.add(user)
        db.session.commit()
        flash(f'User {full_name} created as {role}!', 'success')
        return redirect(url_for('users.list_users'))

    return render_template('pages/create_user.html', roles=ROLES)

@users_bp.route('/profile')
@login_required
def profile():
    return render_template('pages/profile.html', user=current_user)

@users_bp.route('/profile/edit', methods=['GET', 'POST'])
@login_required
def edit_profile():
    if request.method == 'POST':
        full_name = request.form.get('full_name')
        email = request.form.get('email')
        phone = request.form.get('phone')

        # E-Sports fields
        selected_games = request.form.getlist('games')
        trn_username = request.form.get('trn_username', '').strip()
        discord_username = request.form.get('discord_username', '').strip()
        league_os_profile = request.form.get('league_os_profile', '').strip()

        # Check email uniqueness if changed
        if email != current_user.email and User.query.filter_by(email=email).first():
            flash('Email already in use.', 'danger')
            return render_template('pages/edit_profile.html', user=current_user, esport_games=ESPORT_GAMES)

        current_user.full_name = full_name
        current_user.email = email
        current_user.phone = phone
        current_user.games = ','.join(selected_games) if selected_games else None
        current_user.trn_username = trn_username or None
        current_user.discord_username = discord_username or None
        current_user.league_os_profile = league_os_profile or None

        password = request.form.get('password')
        if password:
            current_user.password_hash = hash_password(password)

        db.session.commit()
        flash('Profile updated successfully!', 'success')
        return redirect(url_for('users.profile'))

    return render_template('pages/edit_profile.html', user=current_user, esport_games=ESPORT_GAMES)