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

teams_bp = Blueprint('teams', __name__, url_prefix='/teams')

@teams_bp.route('')
@login_required
def list_teams():
    can_manage = current_user.can_manage_teams()
    
    if current_user.role == 'coach':
        org_team = OrgTeam.query.filter_by(coach_id=current_user.id).first()
        teams = [org_team] if org_team else []
    elif current_user.role in ['player', 'scout'] or can_manage:
        # Players and scouts can view all teams; managers/presidents can manage
        teams = OrgTeam.query.order_by(OrgTeam.name).all()
    else:
        flash('You do not have permission to view teams.', 'danger')
        return redirect(url_for('main.dashboard'))

    coaches = User.query.filter_by(role='coach').order_by(User.full_name).all()
    all_players = User.query.filter_by(role='player').order_by(User.full_name).all()
    return render_template('pages/teams.html', teams=teams, coaches=coaches, all_players=all_players, can_manage=can_manage)

@teams_bp.route('/create', methods=['POST'])
@login_required
def create_team():
    if not current_user.can_manage_teams():
        flash('You do not have permission to create teams.', 'danger')
        return redirect(url_for('teams.list_teams'))

    name = request.form.get('name')
    coach_id = request.form.get('coach_id')

    if not name:
        flash('Team name is required.', 'danger')
        return redirect(url_for('teams.list_teams'))

    existing = OrgTeam.query.filter_by(name=name).first()
    if existing:
        flash(f'Team "{name}" already exists.', 'danger')
        return redirect(url_for('teams.list_teams'))

    team = OrgTeam(
        name=name,
        coach_id=int(coach_id) if coach_id else None,
        created_by=current_user.id
    )
    db.session.add(team)
    db.session.commit()
    flash(f'Team "{name}" created successfully!', 'success')
    return redirect(url_for('teams.list_teams'))

@teams_bp.route('/<int:team_id>/edit', methods=['POST'])
@login_required
def edit_team(team_id):
    team = OrgTeam.query.get_or_404(team_id)
    if not current_user.can_manage_this_org_team(team):
        flash('You do not have permission to edit this team.', 'danger')
        return redirect(url_for('teams.list_teams'))

    name = request.form.get('name')
    coach_id = request.form.get('coach_id')

    if not name:
        flash('Team name is required.', 'danger')
        return redirect(url_for('teams.list_teams'))

    existing = OrgTeam.query.filter(OrgTeam.name == name, OrgTeam.id != team_id).first()
    if existing:
        flash(f'Team "{name}" already exists.', 'danger')
        return redirect(url_for('teams.list_teams'))

    team.name = name
    team.coach_id = int(coach_id) if coach_id else None
    db.session.commit()
    flash(f'Team "{name}" updated successfully!', 'success')
    return redirect(url_for('teams.list_teams'))

@teams_bp.route('/<int:team_id>/delete', methods=['POST'])
@login_required
def delete_team(team_id):
    if not current_user.can_manage_teams():
        flash('You do not have permission to delete teams.', 'danger')
        return redirect(url_for('teams.list_teams'))

    team = OrgTeam.query.get_or_404(team_id)
    name = team.name

    # Check if any tryouts are targeting this team
    from models import Tryout
    tryouts = Tryout.query.filter_by(target_org_team_id=team_id).all()
    if tryouts:
        for t in tryouts:
            t.target_org_team_id = None
        db.session.commit()

    db.session.delete(team)
    db.session.commit()
    flash(f'Team "{name}" deleted successfully.', 'success')
    return redirect(url_for('teams.list_teams'))

@teams_bp.route('/<int:team_id>/add_player', methods=['POST'])
@login_required
def add_player(team_id):
    team = OrgTeam.query.get_or_404(team_id)
    if not current_user.can_manage_this_org_team(team):
        flash('Permission denied.', 'danger')
        return redirect(url_for('teams.list_teams'))
    player_id = request.form.get('player_id')
    position = request.form.get('position', '')

    if not player_id:
        flash('Please select a player.', 'danger')
        return redirect(url_for('teams.list_teams'))

    player = User.query.get_or_404(int(player_id))
    if player.role != 'player':
        flash('Can only assign players to teams.', 'danger')
        return redirect(url_for('teams.list_teams'))

    # If player already belongs to a different team, remove them first
    if player.team_id and player.team_id != team_id:
        old_team = OrgTeam.query.get(player.team_id)
        flash(f'{player.full_name} was moved from {old_team.name} to {team.name}.', 'info')
    elif player.team_id == team_id:
        flash(f'{player.full_name} is already on {team.name}.', 'info')
        return redirect(url_for('teams.list_teams'))

    player.team_id = team_id
    db.session.commit()
    flash(f'{player.full_name} added to {team.name}!', 'success')
    return redirect(url_for('teams.list_teams'))

@teams_bp.route('/<int:team_id>/remove_player/<int:player_id>', methods=['POST'])
@login_required
def remove_player(team_id, player_id):
    team = OrgTeam.query.get_or_404(team_id)
    if not current_user.can_manage_this_org_team(team):
        flash('Permission denied.', 'danger')
        return redirect(url_for('teams.list_teams'))

    player = User.query.get_or_404(player_id)

    if player.team_id != team_id:
        flash(f'{player.full_name} is not on {team.name}.', 'danger')
        return redirect(url_for('teams.list_teams'))

    player.team_id = None
    db.session.commit()
    flash(f'{player.full_name} removed from {team.name}.', 'success')
    return redirect(url_for('teams.list_teams'))