import secrets
import string
from datetime import date, datetime, timedelta, timezone

from flask import current_app
from flask_login import UserMixin

from app import db, login_manager


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


class AppSettings(db.Model):
    """Model for storing application settings that can be modified from admin panel"""

    __tablename__ = "app_settings"

    id = db.Column(db.Integer, primary_key=True)
    key = db.Column(db.String(100), unique=True, nullable=False)
    value = db.Column(db.Text, nullable=True)
    description = db.Column(db.String(255), nullable=True)
    updated_at = db.Column(
        db.DateTime,
        default=lambda: datetime.now(timezone.utc),
        onupdate=lambda: datetime.now(timezone.utc),
    )

    @staticmethod
    def get_setting(key, default=None):
        """Get a setting value by key"""
        setting = AppSettings.query.filter_by(key=key).first()
        return setting.value if setting else default

    @staticmethod
    def set_setting(key, value, description=None):
        """Set a setting value"""
        setting = AppSettings.query.filter_by(key=key).first()
        if setting:
            setting.value = value
            if description:
                setting.description = description
        else:
            setting = AppSettings(key=key, value=value, description=description)
            db.session.add(setting)
        db.session.commit()
        return setting

    @staticmethod
    def get_app_name():
        """Get the application name"""
        return AppSettings.get_setting("app_name", "Apex Ores")

    @staticmethod
    def get_app_logo():
        """Get the application logo URL"""
        return AppSettings.get_setting("app_logo", None)

    @staticmethod
    def get_fake_user_count():
        """Get the fake user count added by admin for display purposes"""
        value = AppSettings.get_setting("fake_user_count", "0")
        try:
            return int(value)
        except (ValueError, TypeError):
            return 0

    @staticmethod
    def set_fake_user_count(count):
        """Set the fake user count"""
        AppSettings.set_setting(
            "fake_user_count",
            str(count),
            "Nombre d'utilisateurs fictifs ajoutés pour l'affichage",
        )

    @staticmethod
    def get_total_displayed_users():
        """Get total users to display (real + fake)"""
        real_users = User.query.count()
        fake_users = AppSettings.get_fake_user_count()
        return real_users + fake_users


class User(UserMixin, db.Model):
    __tablename__ = "users"

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False, default="Utilisateur")
    phone = db.Column(db.String(20), unique=True, nullable=False)
    country_code = db.Column(db.String(5), nullable=False)
    password_hash = db.Column(db.String(255), nullable=False)
    referral_code = db.Column(db.String(10), unique=True, nullable=False)
    referred_by_code = db.Column(db.String(10), nullable=True)

    balance = db.Column(db.Float, default=0.0)
    bonus_balance = db.Column(db.Float, default=0.0)
    total_gains = db.Column(db.Float, default=0.0)

    # Referral earnings tracking
    referral_earnings = db.Column(db.Float, default=0.0)  # Total earned from referrals

    # Registration bonus tracking - bonus is locked until first subscription
    registration_bonus = db.Column(db.Float, default=0.0)
    registration_bonus_unlocked = db.Column(db.Boolean, default=False)

    # Track if user has seen the welcome popup
    has_seen_welcome_popup = db.Column(db.Boolean, default=False)

    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
    last_login = db.Column(db.DateTime, nullable=True)
    last_daily_bonus = db.Column(db.Date, nullable=True)

    account_active = db.Column(db.Boolean, default=True)
    is_admin = db.Column(db.Boolean, default=False)

    metals = db.relationship(
        "UserMetal", backref="user", lazy=True, cascade="all, delete-orphan"
    )
    transactions = db.relationship(
        "Transaction", backref="user", lazy=True, cascade="all, delete-orphan"
    )
    notifications = db.relationship(
        "Notification", backref="user", lazy=True, cascade="all, delete-orphan"
    )

    def __init__(self, phone, country_code, password, name="Utilisateur"):
        self.name = name
        self.phone = phone
        self.country_code = country_code
        self.password_hash = password
        self.referral_code = self.generate_referral_code()

    def generate_referral_code(self):
        while True:
            code = "".join(
                secrets.choice(string.ascii_uppercase + string.digits) for _ in range(6)
            )
            if not User.query.filter_by(referral_code=code).first():
                return code

    @property
    def has_active_subscription(self):
        """Check if user has ever purchased a subscription plan"""
        return UserMetal.query.filter_by(user_id=self.id).count() > 0

    @property
    def display_balance(self):
        """Total balance displayed to user (includes locked bonus)"""
        return self.balance + (
            self.registration_bonus if not self.registration_bonus_unlocked else 0
        )

    @property
    def withdrawable_balance(self):
        """Balance available for withdrawal (excludes locked bonus)"""
        return self.balance

    @property
    def locked_bonus(self):
        """Amount of registration bonus still locked"""
        if self.registration_bonus_unlocked:
            return 0
        return self.registration_bonus

    def unlock_registration_bonus(self):
        """Unlock the registration bonus and add it to main balance"""
        if not self.registration_bonus_unlocked and self.registration_bonus > 0:
            self.balance += self.registration_bonus
            self.registration_bonus_unlocked = True
            return True
        return False

    def get_referrer(self):
        """Get the user who referred this user"""
        if self.referred_by_code:
            return User.query.filter_by(referral_code=self.referred_by_code).first()
        return None

    def get_referrals(self):
        """Get all users referred by this user"""
        return User.query.filter_by(referred_by_code=self.referral_code).all()

    def get_referral_count(self):
        """Get count of users referred by this user"""
        return User.query.filter_by(referred_by_code=self.referral_code).count()


class Metal(db.Model):
    __tablename__ = "metals"

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    description = db.Column(db.Text)
    price = db.Column(db.Float, nullable=False)
    daily_gain = db.Column(db.Float, nullable=False)
    cycle_days = db.Column(db.Integer, nullable=False)
    image_url = db.Column(db.String(255))

    is_active = db.Column(db.Boolean, default=True)
    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))

    user_metals = db.relationship(
        "UserMetal", backref="metal", lazy=True, cascade="all, delete-orphan"
    )

    @property
    def total_return(self):
        return self.daily_gain * self.cycle_days


class UserMetal(db.Model):
    __tablename__ = "user_metals"

    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(db.Integer, db.ForeignKey("users.id"), nullable=False)
    metal_id = db.Column(db.Integer, db.ForeignKey("metals.id"), nullable=False)

    purchase_date = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
    expiry_date = db.Column(db.DateTime, nullable=False)
    last_gain_date = db.Column(db.Date, default=date.today)
    is_active = db.Column(db.Boolean, default=True)

    purchase_price = db.Column(db.Float, nullable=False)


class Transaction(db.Model):
    __tablename__ = "transactions"

    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(db.Integer, db.ForeignKey("users.id"), nullable=False)

    type = db.Column(db.String(20), nullable=False)
    amount = db.Column(db.Float, nullable=False)
    description = db.Column(db.String(255))
    status = db.Column(db.String(20), default="pending")

    # Withdrawal specific fields
    gross_amount = db.Column(db.Float, nullable=True)  # Amount before fees
    fee_amount = db.Column(db.Float, nullable=True)  # Fee amount
    net_amount = db.Column(
        db.Float, nullable=True
    )  # Amount after fees (what user receives)

    # 24h delay processing
    scheduled_process_time = db.Column(
        db.DateTime, nullable=True
    )  # When the withdrawal can be processed
    admin_action = db.Column(
        db.String(20), nullable=True
    )  # 'approved', 'rejected', or None (auto-approved after 24h)
    admin_action_time = db.Column(db.DateTime, nullable=True)  # When admin took action

    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
    processed_at = db.Column(db.DateTime, nullable=True)

    @staticmethod
    def get_withdrawal_fee_percentage():
        """Get withdrawal fee percentage from config"""
        try:
            return current_app.config.get("WITHDRAWAL_FEE_PERCENTAGE", 0.15)
        except RuntimeError:
            # Outside application context, use default
            return 0.15

    @staticmethod
    def get_withdrawal_delay_hours():
        """Get withdrawal delay in hours from config"""
        try:
            return current_app.config.get("WITHDRAWAL_DELAY_HOURS", 24)
        except RuntimeError:
            return 24

    @staticmethod
    def calculate_withdrawal_fee(amount):
        """Calculate withdrawal fee based on config percentage"""
        fee_percentage = Transaction.get_withdrawal_fee_percentage()
        fee = amount * fee_percentage
        net = amount - fee
        return {
            "gross": amount,
            "fee": fee,
            "net": net,
            "fee_percentage": fee_percentage * 100,
        }

    @staticmethod
    def calculate_scheduled_process_time(from_time=None):
        """
        Calculate when a withdrawal should be processed (configurable delay, business days only)
        If withdrawal is on Friday, Saturday, or Sunday, schedule for Monday + delay
        """
        if from_time is None:
            from_time = datetime.now(timezone.utc)

        delay_hours = Transaction.get_withdrawal_delay_hours()

        # Add delay hours
        process_time = from_time + timedelta(hours=delay_hours)

        # Check if it falls on a weekend (Saturday=5, Sunday=6)
        while process_time.weekday() in [5, 6]:
            # Move to next day
            process_time += timedelta(days=1)

        return process_time

    def can_be_auto_processed(self):
        """Check if withdrawal can be auto-processed (delay passed and no admin action)"""
        if self.type != "withdrawal" or self.status != "pending":
            return False
        if self.admin_action is not None:
            return False
        if self.scheduled_process_time is None:
            return False

        now = datetime.now(timezone.utc)
        # Check if current time is a business day
        if now.weekday() in [5, 6]:
            return False

        return now >= self.scheduled_process_time

    @staticmethod
    def get_total_withdrawal_fees():
        """Get total fees collected from all completed withdrawals"""
        total = (
            db.session.query(db.func.sum(Transaction.fee_amount))
            .filter(
                Transaction.type == "withdrawal",
                Transaction.status.in_(["approved", "completed"]),
                Transaction.fee_amount.isnot(None),
            )
            .scalar()
        )
        return total or 0

    @staticmethod
    def get_total_withdrawals_amount():
        """Get total amount of all completed withdrawals (gross amount)"""
        total = (
            db.session.query(db.func.sum(Transaction.gross_amount))
            .filter(
                Transaction.type == "withdrawal",
                Transaction.status.in_(["approved", "completed"]),
                Transaction.gross_amount.isnot(None),
            )
            .scalar()
        )
        return total or 0


class ReferralCommission(db.Model):
    __tablename__ = "referral_commissions"

    id = db.Column(db.Integer, primary_key=True)
    referrer_id = db.Column(db.Integer, db.ForeignKey("users.id"), nullable=False)
    referred_user_id = db.Column(db.Integer, db.ForeignKey("users.id"), nullable=False)

    level = db.Column(db.Integer, nullable=False)
    commission_type = db.Column(
        db.String(20), nullable=False
    )  # 'purchase' or 'daily_gain'
    commission_percentage = db.Column(db.Float, nullable=False)
    commission_amount = db.Column(db.Float, nullable=False)

    purchase_amount = db.Column(db.Float, nullable=True)  # For purchase commissions
    gain_amount = db.Column(db.Float, nullable=True)  # For daily gain commissions

    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))

    referrer = db.relationship(
        "User", foreign_keys=[referrer_id], backref="commissions_earned"
    )
    referred_user = db.relationship(
        "User", foreign_keys=[referred_user_id], backref="commissions_generated"
    )

    @staticmethod
    def get_purchase_commission_rate():
        """Get purchase commission rate from config (default 15%)"""
        try:
            return current_app.config.get("REFERRAL_PURCHASE_COMMISSION", 0.15)
        except RuntimeError:
            # Outside application context, use default
            return 0.15

    @staticmethod
    def get_daily_gain_commission_rate():
        """Get daily gain commission rate from config (default 3%)"""
        try:
            return current_app.config.get("REFERRAL_DAILY_GAIN_COMMISSION", 0.03)
        except RuntimeError:
            # Outside application context, use default
            return 0.03

    @staticmethod
    def calculate_purchase_commission(purchase_amount):
        """Calculate commission on plan purchase using config rate"""
        rate = ReferralCommission.get_purchase_commission_rate()
        return purchase_amount * rate

    @staticmethod
    def calculate_daily_gain_commission(gain_amount):
        """Calculate commission on daily gains using config rate"""
        rate = ReferralCommission.get_daily_gain_commission_rate()
        return gain_amount * rate

    @staticmethod
    def create_purchase_commission(referrer, referred_user, purchase_amount):
        """Create a commission entry for a plan purchase"""
        rate = ReferralCommission.get_purchase_commission_rate()
        commission_amount = purchase_amount * rate

        commission = ReferralCommission(
            referrer_id=referrer.id,
            referred_user_id=referred_user.id,
            level=1,
            commission_type="purchase",
            commission_percentage=rate * 100,
            commission_amount=commission_amount,
            purchase_amount=purchase_amount,
        )

        # Add commission to referrer's balance
        referrer.balance += commission_amount
        referrer.referral_earnings = (
            referrer.referral_earnings or 0
        ) + commission_amount

        db.session.add(commission)
        return commission

    @staticmethod
    def create_daily_gain_commission(referrer, referred_user, gain_amount):
        """Create a commission entry for daily gains"""
        rate = ReferralCommission.get_daily_gain_commission_rate()
        commission_amount = gain_amount * rate

        commission = ReferralCommission(
            referrer_id=referrer.id,
            referred_user_id=referred_user.id,
            level=1,
            commission_type="daily_gain",
            commission_percentage=rate * 100,
            commission_amount=commission_amount,
            gain_amount=gain_amount,
        )

        # Add commission to referrer's balance
        referrer.balance += commission_amount
        referrer.referral_earnings = (
            referrer.referral_earnings or 0
        ) + commission_amount

        db.session.add(commission)
        return commission


class Notification(db.Model):
    __tablename__ = "notifications"

    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(db.Integer, db.ForeignKey("users.id"), nullable=False)

    title = db.Column(db.String(100), nullable=False)
    message = db.Column(db.Text, nullable=False)
    type = db.Column(db.String(20), default="info")

    is_read = db.Column(db.Boolean, default=False)
    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))


class ScheduledTask(db.Model):
    """Model for database-based scheduled tasks - replaces cron jobs"""

    __tablename__ = "scheduled_tasks"

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), unique=True, nullable=False)
    description = db.Column(db.String(255))

    # Configuration
    schedule_type = db.Column(db.String(20), default="daily")  # daily, hourly, interval
    schedule_time = db.Column(db.Time, nullable=True)  # Heure exacte (ex: 00:05:00)
    interval_minutes = db.Column(db.Integer, nullable=True)  # Ou intervalle

    # État
    is_active = db.Column(db.Boolean, default=True)
    last_run_at = db.Column(db.DateTime, nullable=True)
    next_run_at = db.Column(db.DateTime, nullable=True)
    last_status = db.Column(
        db.String(20), default="pending"
    )  # pending, running, success, failed
    last_error = db.Column(db.Text, nullable=True)
    run_count = db.Column(db.Integer, default=0)
    fail_count = db.Column(db.Integer, default=0)

    # Métadonnées
    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
    updated_at = db.Column(
        db.DateTime,
        default=lambda: datetime.now(timezone.utc),
        onupdate=lambda: datetime.now(timezone.utc),
    )

    def __repr__(self):
        return f"<ScheduledTask {self.name}>"

    def should_run(self):
        """Vérifie si la tâche doit s'exécuter maintenant"""
        from datetime import timezone

        if not self.is_active:
            return False

        if not self.next_run_at:
            self.calculate_next_run()
            return True

        now = datetime.now(timezone.utc)
        next_run = self.next_run_at

        if next_run.tzinfo is None:
            next_run = next_run.replace(tzinfo=timezone.utc)

        return now >= next_run

    def calculate_next_run(self):
        """Calcule la prochaine exécution"""
        from datetime import date, time, timedelta

        now = datetime.now(timezone.utc)

        if self.schedule_type == "daily" and self.schedule_time:
            # Prochaine exécution à l'heure définie
            next_run = datetime.combine(date.today(), self.schedule_time)
            next_run = next_run.replace(tzinfo=timezone.utc)
            if next_run <= now:
                next_run += timedelta(days=1)
            self.next_run_at = next_run

        elif self.schedule_type == "hourly":
            # Toutes les heures
            self.next_run_at = now.replace(
                minute=0, second=0, microsecond=0
            ) + timedelta(hours=1)

        elif self.schedule_type == "interval" and self.interval_minutes:
            # Intervalle personnalisé
            if self.last_run_at:
                self.next_run_at = self.last_run_at + timedelta(
                    minutes=self.interval_minutes
                )
            else:
                self.next_run_at = now

    def mark_running(self):
        """Marque la tâche comme en cours"""
        self.last_status = "running"
        db.session.commit()

    def mark_success(self):
        """Marque la tâche comme réussie"""
        self.last_run_at = datetime.now(timezone.utc)
        self.run_count += 1
        self.last_status = "success"
        self.last_error = None
        self.calculate_next_run()
        db.session.commit()

    def mark_failed(self, error_message):
        """Marque la tâche comme échouée"""
        self.last_run_at = datetime.now(timezone.utc)
        self.fail_count += 1
        self.last_status = "failed"
        self.last_error = str(error_message)[:500]  # Limiter la taille
        self.calculate_next_run()
        db.session.commit()


class TaskExecutionLog(db.Model):
    """Log d'exécution des tâches planifiées"""

    __tablename__ = "task_execution_logs"

    id = db.Column(db.Integer, primary_key=True)
    task_id = db.Column(db.Integer, db.ForeignKey("scheduled_tasks.id"), nullable=False)
    task_name = db.Column(db.String(100), nullable=False)

    started_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
    completed_at = db.Column(db.DateTime, nullable=True)
    status = db.Column(db.String(20), default="running")  # running, success, failed
    error_message = db.Column(db.Text, nullable=True)
    output_log = db.Column(db.Text, nullable=True)

    # Pour debug
    server_hostname = db.Column(db.String(100), nullable=True)
    process_id = db.Column(db.Integer, nullable=True)

    task = db.relationship(
        "ScheduledTask", backref=db.backref("execution_logs", lazy="dynamic")
    )

    def __repr__(self):
        return f"<TaskExecutionLog {self.task_name} {self.status}>"