from extensions import db, login_manager
from flask_login import UserMixin
from datetime import datetime

ROLES = ['president', 'manager', 'coach', 'player', 'scout']

# Popular E-Sports games list
ESPORT_GAMES = [
    'Valorant',
    'League of Legends',
    'Counter-Strike 2',
    'Apex Legends',
    'Overwatch 2',
    'Rainbow Six Siege',
    'Fortnite',
    'Rocket League',
    'Call of Duty',
    'Dota 2',
    'Super Smash Bros.',
    'Street Fighter 6',
]

class User(UserMixin, db.Model):
    __tablename__ = 'users'
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True, nullable=False)
    password_hash = db.Column(db.String(128), nullable=False)
    role = db.Column(db.String(20), nullable=False, default='player')
    full_name = db.Column(db.String(100), nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    phone = db.Column(db.String(20), nullable=True)
    team_id = db.Column(db.Integer, db.ForeignKey('org_teams.id'), nullable=True)
    is_active_account = db.Column(db.Boolean, default=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)

    # E-Sports specific fields
    games = db.Column(db.Text, nullable=True)  # Comma-separated list of games
    trn_username = db.Column(db.String(120), nullable=True)  # Tracker Network username
    discord_username = db.Column(db.String(100), nullable=True)  # Discord handle
    league_os_profile = db.Column(db.String(255), nullable=True)  # League OS profile URL or ID

    evaluations_given = db.relationship('Evaluation', foreign_keys='Evaluation.evaluator_id', backref='evaluator', lazy='dynamic')
    evaluations_received = db.relationship('Evaluation', foreign_keys='Evaluation.player_id', backref='player', lazy='dynamic')
    tryout_registrations = db.relationship('TryoutRegistration', backref='player', lazy='dynamic')
    team_assignments = db.relationship('TeamMember', foreign_keys='TeamMember.player_id', backref='player_ref', lazy='dynamic')

    def get_games_list(self):
        """Return games as a list."""
        if self.games:
            return [g.strip() for g in self.games.split(',') if g.strip()]
        return []

    def has_role(self, *roles):
        return self.role in roles

    def can_evaluate(self):
        return self.role in ['president', 'manager', 'coach']

    def can_manage_users(self):
        return self.role == 'president'

    def can_manage_tryouts(self):
        return self.role in ['president', 'manager', 'coach', 'scout']

    def can_manage_teams(self):
        return self.role in ['president', 'manager']
    
    def can_schedule_matches(self):
        return self.role in ['president', 'manager', 'coach']

    def can_manage_this_tryout(self, tryout):
        """Check if user can manage a specific tryout (president, or manager/coach in charge of it)."""
        if self.role == 'president':
            return True
        if self.role == 'manager' and tryout.created_by == self.id:
            return True
        if self.role == 'coach':
            org_team = OrgTeam.query.filter_by(coach_id=self.id).first()
            if org_team and tryout.target_org_team_id == org_team.id:
                return True
        return False

    def can_manage_this_org_team(self, org_team):
        """Check if user can manage a specific org team (president, or manager/coach in charge of it)."""
        if self.role == 'president':
            return True
        if self.role == 'manager':
            return True  # Managers can manage all org teams (create/edit/delete)
        if self.role == 'coach' and org_team.coach_id == self.id:
            return True
        return False


@login_manager.user_loader
def load_user(user_id):
    return User.query.get(int(user_id))


class OrgTeam(db.Model):
    """Persistent organization teams (e.g., Varsity, JV) that exist across tryouts."""
    __tablename__ = 'org_teams'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False, unique=True)
    coach_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=True)
    created_by = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)

    coach = db.relationship('User', foreign_keys=[coach_id], backref='coached_org_team', uselist=False)
    creator = db.relationship('User', foreign_keys=[created_by])
    players = db.relationship('User', foreign_keys='User.team_id', backref='org_team', lazy='dynamic')


class Tryout(db.Model):
    __tablename__ = 'tryouts'
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(200), nullable=False)
    description = db.Column(db.Text, nullable=True)
    date = db.Column(db.Date, nullable=False)
    location = db.Column(db.String(200), nullable=True)
    status = db.Column(db.String(20), default='upcoming')  # upcoming, in_progress, completed
    max_players = db.Column(db.Integer, nullable=True)
    created_by = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    target_org_team_id = db.Column(db.Integer, db.ForeignKey('org_teams.id'), nullable=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)

    creator = db.relationship('User', backref='created_tryouts')
    registrations = db.relationship('TryoutRegistration', backref='tryout', lazy='dynamic')
    evaluations = db.relationship('Evaluation', backref='tryout', lazy='dynamic')
    teams = db.relationship('Team', backref='tryout', lazy='dynamic')
    target_org_team = db.relationship('OrgTeam', backref='tryouts', foreign_keys=[target_org_team_id])


class TryoutRegistration(db.Model):
    __tablename__ = 'tryout_registrations'
    id = db.Column(db.Integer, primary_key=True)
    tryout_id = db.Column(db.Integer, db.ForeignKey('tryouts.id'), nullable=False)
    player_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    registered_at = db.Column(db.DateTime, default=datetime.utcnow)
    status = db.Column(db.String(20), default='registered')  # registered, attended, no_show
    notes = db.Column(db.Text, nullable=True)


class Evaluation(db.Model):
    __tablename__ = 'evaluations'
    id = db.Column(db.Integer, primary_key=True)
    tryout_id = db.Column(db.Integer, db.ForeignKey('tryouts.id'), nullable=False)
    player_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    evaluator_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    speed_score = db.Column(db.Integer, nullable=True)
    agility_score = db.Column(db.Integer, nullable=True)
    technique_score = db.Column(db.Integer, nullable=True)
    teamwork_score = db.Column(db.Integer, nullable=True)
    attitude_score = db.Column(db.Integer, nullable=True)
    overall_score = db.Column(db.Float, nullable=True)
    comments = db.Column(db.Text, nullable=True)
    position_recommendation = db.Column(db.String(50), nullable=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    __table_args__ = (
        db.UniqueConstraint('tryout_id', 'player_id', 'evaluator_id', name='unique_evaluation'),
    )


class Team(db.Model):
    """Tryout-specific teams (e.g., Alpha, Bravo within a single tryout)."""
    __tablename__ = 'teams'
    id = db.Column(db.Integer, primary_key=True)
    tryout_id = db.Column(db.Integer, db.ForeignKey('tryouts.id'), nullable=False)
    name = db.Column(db.String(100), nullable=False)
    created_by = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)

    creator = db.relationship('User', backref='created_teams')
    members = db.relationship('TeamMember', backref='team', lazy='dynamic')


class TeamMember(db.Model):
    __tablename__ = 'team_members'
    id = db.Column(db.Integer, primary_key=True)
    team_id = db.Column(db.Integer, db.ForeignKey('teams.id'), nullable=False)
    player_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    position = db.Column(db.String(50), nullable=True)
    added_at = db.Column(db.DateTime, default=datetime.utcnow)

    player = db.relationship('User', overlaps="player_ref,team_assignments")  # Many-to-one, no dynamic loader


class Match(db.Model):
    """Matches/scrimmages scheduled within tryouts."""
    __tablename__ = 'matches'
    id = db.Column(db.Integer, primary_key=True)
    tryout_id = db.Column(db.Integer, db.ForeignKey('tryouts.id'), nullable=False)
    title = db.Column(db.String(200), nullable=False)
    description = db.Column(db.Text, nullable=True)
    date = db.Column(db.Date, nullable=False)
    start_time = db.Column(db.Time, nullable=True)
    end_time = db.Column(db.Time, nullable=True)
    location = db.Column(db.String(200), nullable=True)
    status = db.Column(db.String(20), default='scheduled')  # scheduled, completed, cancelled
    match_type = db.Column(db.String(20), nullable=False)  # team_vs_team, player_scrim
    created_by = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)

    # For team vs team matches
    team1_id = db.Column(db.Integer, db.ForeignKey('teams.id'), nullable=True)
    team2_id = db.Column(db.Integer, db.ForeignKey('teams.id'), nullable=True)

    creator = db.relationship('User', backref='created_matches')
    tryout = db.relationship('Tryout', backref='matches')
    team1 = db.relationship('Team', foreign_keys=[team1_id], backref='matches_as_team1')
    team2 = db.relationship('Team', foreign_keys=[team2_id], backref='matches_as_team2')
    participants = db.relationship('MatchParticipant', backref='match', lazy='dynamic')

    def get_participating_players(self):
        """Return list of players participating in this match."""
        return [p.player_id for p in self.participants.all()]


class PlayerDisponibility(db.Model):
    """Player availability in 30-minute time blocks for scheduling matches."""
    __tablename__ = 'player_disponibilities'
    id = db.Column(db.Integer, primary_key=True)
    player_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    day_of_week = db.Column(db.Integer, nullable=False)  # 0=Monday, 6=Sunday
    start_time = db.Column(db.Time, nullable=False)
    end_time = db.Column(db.Time, nullable=False)  # Always 30 minutes after start_time
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    player = db.relationship('User', backref='disponibilities')


class MatchParticipant(db.Model):
    """Players participating in player scrimmage matches."""
    __tablename__ = 'match_participants'
    id = db.Column(db.Integer, primary_key=True)
    match_id = db.Column(db.Integer, db.ForeignKey('matches.id'), nullable=False)
    player_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    team_side = db.Column(db.Integer, nullable=True)  # 1 for team 1, 2 for team 2 (for player_vs_player matches)
    position = db.Column(db.String(50), nullable=True)  # Position for this match
    added_at = db.Column(db.DateTime, default=datetime.utcnow)

    player = db.relationship('User')