# management/models.py
# -*- coding: utf-8 -*-
from django.db import models
from django.contrib.auth.models import AbstractUser
from django.utils import timezone
import uuid
import datetime

# --- Users & Authentication ---
class CustomUser(AbstractUser):
    ROLE_CHOICES = [
        ('SuperAdmin', 'Super Admin'),
        ('PanelOwner', 'Panel Owner'),
        ('AdminLevel2', 'Admin Level 2'),
        ('AdminLevel3', 'Admin Level 3'),
        ('EndUser', 'End User'),
    ]
    role = models.CharField(max_length=20, choices=ROLE_CHOICES, default='EndUser')
    marzban_admin_id = models.UUIDField(null=True, blank=True)

    def is_super_admin(self):
        return self.role == 'SuperAdmin'

    def is_admin_level_2(self):
        return self.role in ('SuperAdmin', 'PanelOwner', 'AdminLevel2')

    def is_admin_level_3(self):
        return self.role in ('SuperAdmin', 'PanelOwner', 'AdminLevel2', 'AdminLevel3')

    def __str__(self):
        return self.username

# --- Main Website Models ---
class AdminLevel2(models.Model):
    user = models.OneToOneField(
        CustomUser, on_delete=models.CASCADE, related_name='admin_level_2'
    )
    telegram_chat_id = models.CharField(
        max_length=255, blank=True, null=True,
        verbose_name="تلگرام چت آیدی"
    )
    license_expiry_date = models.DateField(
        null=True, blank=True, verbose_name="تاریخ انقضای لایسنس"
    )
    def __str__(self):
        return f"Admin Level 2: {self.user.username}"


class AdminLevel3(models.Model):
    user = models.OneToOneField(
        CustomUser, on_delete=models.CASCADE, related_name='admin_level_3'
    )
    parent_admin = models.ForeignKey(
        AdminLevel2,
        on_delete=models.CASCADE,
        related_name='child_admins',
        verbose_name="ادمین والد (سطح ۲)"
    )
    telegram_chat_id = models.CharField(
        max_length=255, blank=True, null=True,
        verbose_name="تلگرام چت آیدی"
    )
    def __str__(self):
        return f"Admin Level 3: {self.user.username}"

class Panel(models.Model):
    owner = models.OneToOneField(CustomUser, on_delete=models.CASCADE, related_name='owned_panel')
    name = models.CharField(max_length=255, verbose_name="نام پنل")
    marzban_host = models.CharField(max_length=255, verbose_name="آدرس هاست Marzban")
    marzban_username = models.CharField(max_length=255, verbose_name="نام کاربری Marzban")
    marzban_password = models.CharField(max_length=255, verbose_name="رمز عبور Marzban")
    telegram_bot_token = models.CharField(max_length=255, blank=True, null=True)
    # ADDED: Link to the license
    license = models.OneToOneField('License', on_delete=models.SET_NULL, null=True, blank=True, related_name='linked_panel')
    
    def __str__(self):
        return self.name

class License(models.Model):
    key = models.UUIDField(default=uuid.uuid4, editable=False, unique=True, verbose_name="کلید لایسنس")
    is_active = models.BooleanField(default=True, verbose_name="وضعیت فعال")
    owner = models.ForeignKey(CustomUser, on_delete=models.CASCADE, verbose_name="صاحب لایسنس")
    created_at = models.DateTimeField(auto_now_add=True, verbose_name="تاریخ ایجاد")
    expiry_date = models.DateField(verbose_name="تاریخ انقضا")

    def __str__(self):
        return str(self.key)

# ADDED: MarzbanAdmin model (was missing)
class MarzbanAdmin(models.Model):
    username = models.CharField(max_length=255, unique=True)
    password = models.CharField(max_length=255)
    permission = models.CharField(max_length=50)
    panel = models.ForeignKey(Panel, on_delete=models.CASCADE, related_name='marzban_admins')

    def __str__(self):
        return self.username

# ADDED: MarzbanUser model (was missing)
class MarzbanUser(models.Model):
    username = models.CharField(max_length=255, unique=True)
    # Add other fields relevant to Marzban users
    # ...
    
    def __str__(self):
        return self.username

class EndUser(models.Model):
    username = models.CharField(max_length=255, unique=True)
    panel = models.ForeignKey(Panel, on_delete=models.CASCADE)
    # marzban_user_id can be nullable if the user is created first in our DB
    marzban_user_id = models.CharField(max_length=255, unique=True, null=True, blank=True)
    telegram_chat_id = models.CharField(max_length=255, blank=True, null=True)

    def __str__(self):
        return self.username

# ADDED: Plan model (was missing)
class Plan(models.Model):
    name = models.CharField(max_length=100)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    duration_days = models.IntegerField()
    data_limit_gb = models.FloatField()
    is_active = models.BooleanField(default=True)
    panel = models.ForeignKey(Panel, on_delete=models.CASCADE, related_name='plans')

    def __str__(self):
        return f"{self.name} ({self.panel.name})"

# ADDED: Subscription model (was missing)
class Subscription(models.Model):
    STATUS_CHOICES = [
        ('active', 'فعال'),
        ('expired', 'منقضی شده'),
        ('pending', 'در انتظار پرداخت'),
        ('deactivated', 'غیرفعال'),
    ]
    end_user = models.ForeignKey(EndUser, on_delete=models.CASCADE, related_name='subscriptions')
    plan = models.ForeignKey(Plan, on_delete=models.PROTECT) # Don't delete plan if subscription exists
    panel = models.ForeignKey(Panel, on_delete=models.CASCADE, related_name='subscriptions')
    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='pending')
    start_date = models.DateField(null=True, blank=True)
    end_date = models.DateField(null=True, blank=True)
    remaining_data_gb = models.FloatField(null=True, blank=True)
    
    def __str__(self):
        return f"Subscription for {self.end_user.username} on plan {self.plan.name}"

# FIXED: Complete overhaul of the Payment model
class Payment(models.Model):
    STATUS_CHOICES = [
        ('pending', 'در انتظار تأیید'),
        ('approved', 'تأیید شده'),
        ('rejected', 'رد شده'),
    ]
    subscription = models.ForeignKey(Subscription, on_delete=models.CASCADE, related_name='payments')
    admin = models.ForeignKey(CustomUser, on_delete=models.PROTECT, related_name='handled_payments') # The admin to approve
    amount = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="مبلغ")
    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='pending', verbose_name="وضعیت")
    created_at = models.DateTimeField(auto_now_add=True, verbose_name="تاریخ ایجاد")
    
    # Fields for receipt upload
    payment_token = models.UUIDField(default=uuid.uuid4, editable=False, unique=True)
    receipt_image = models.ImageField(upload_to='receipts/', blank=True, null=True, verbose_name="تصویر رسید")
    receipt_text = models.TextField(blank=True, null=True, verbose_name="متن رسید")

    def __str__(self):
        return f"Payment for {self.subscription.end_user.username} - {self.amount} - {self.status}"


class DiscountCode(models.Model):
    code = models.CharField(max_length=50, unique=True)
    admin = models.ForeignKey(CustomUser, on_delete=models.CASCADE)
    discount_percentage = models.DecimalField(max_digits=5, decimal_places=2)
    is_active = models.BooleanField(default=True)
    def __str__(self):
        return self.code

# --- Telegram Integration ---
class TelegramUser(models.Model):
    admin_id = models.CharField(max_length=255, unique=True, primary_key=True)
    chat_id = models.CharField(max_length=255, unique=True)
    username = models.CharField(max_length=255)
    class Meta:
        managed = False
        db_table = 'telegram_users'
    def __str__(self):
        return self.username

class SecurityToken(models.Model):
    admin_id = models.CharField(max_length=255, primary_key=True)
    token = models.CharField(max_length=255, unique=True, default=uuid.uuid4)
    expiration_date = models.DateTimeField()
    class Meta:
        managed = False
        db_table = 'telegram_tokens'
    def __str__(self):
        return f"Token for {self.admin_id}"

# --- Push Notifications ---
class PushSubscription(models.Model):
    user = models.ForeignKey(
        CustomUser, on_delete=models.CASCADE, related_name='push_subscriptions'
    )
    subscription_info = models.JSONField()
    created_at = models.DateTimeField(auto_now_add=True)

# --- Payment System Models ---
class PaymentMethod(models.Model):
    METHOD_CHOICES = [
        ('gateway', 'Bank Gateway'),
        ('crypto', 'Cryptocurrency'),
        ('manual', 'Manual (Card-to-Card)'),
    ]
    name = models.CharField(max_length=50, choices=METHOD_CHOICES, unique=True, verbose_name="Payment Method Name")
    is_active = models.BooleanField(default=True, verbose_name="Is Active?")
    can_be_managed_by_level3 = models.BooleanField(default=False, verbose_name="Can be managed by Admin Level 3?")

    class Meta:
        verbose_name = "Payment Method"
        verbose_name_plural = "Payment Methods"

    def __str__(self):
        return self.get_name_display()

class PaymentSetting(models.Model):
    admin_level_3 = models.ForeignKey(
        CustomUser,
        on_delete=models.CASCADE,
        limit_choices_to={'role': 'AdminLevel3'},
        related_name='payment_settings'
    )
    payment_method = models.ForeignKey(PaymentMethod, on_delete=models.CASCADE)
    is_active = models.BooleanField(default=False, verbose_name="Is Active for this Admin?")

    class Meta:
        unique_together = ('admin_level_3', 'payment_method')
        verbose_name = "Payment Setting"
        verbose_name_plural = "Payment Settings"

    def __str__(self):
        return f"{self.admin_level_3.username}'s {self.payment_method.get_name_display()} Setting"

class PaymentDetail(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    admin_level_3 = models.OneToOneField(
        CustomUser,
        on_delete=models.CASCADE,
        limit_choices_to={'role': 'AdminLevel3'},
        related_name='payment_details'
    )
    card_number = models.CharField(max_length=50, blank=True, null=True)
    card_holder_name = models.CharField(max_length=255, blank=True, null=True)
    wallet_address = models.CharField(max_length=255, blank=True, null=True)

    class Meta:
        verbose_name = "Payment Detail"
        verbose_name_plural = "Payment Details"

    def __str__(self):
        return f"Payment details for {self.admin_level_3.username}"