import logging

import stripe
from django.contrib.auth.models import AbstractUser
from django.db import models
from yaml import load
from yaml.parser import ParserError
from yaml.scanner import ScannerError

from core.lib.customers import get_or_create, update_customer_fields

try:
    from yaml import CLoader as Loader
except ImportError:
    from yaml import Loader
logger = logging.getLogger(__name__)


class Plan(models.Model):
    name = models.CharField(max_length=255, unique=True)
    description = models.CharField(max_length=1024, null=True, blank=True)
    cost = models.IntegerField()
    product_id = models.CharField(max_length=255, unique=True, null=True, blank=True)
    image = models.CharField(max_length=1024, null=True, blank=True)

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


class User(AbstractUser):
    # Stripe customer ID
    stripe_id = models.CharField(max_length=255, null=True, blank=True)
    last_payment = models.DateTimeField(null=True, blank=True)
    plans = models.ManyToManyField(Plan, blank=True)
    email = models.EmailField(unique=True)

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self._original = self

    def save(self, *args, **kwargs):
        """
        Override the save function to create a Stripe customer.
        """
        if not self.stripe_id:  # stripe ID not stored
            self.stripe_id = get_or_create(self.email, self.first_name, self.last_name)

        to_update = {}
        if self.email != self._original.email:
            to_update["email"] = self.email
        if self.first_name != self._original.first_name:
            to_update["first_name"] = self.first_name
        if self.last_name != self._original.last_name:
            to_update["last_name"] = self.last_name

        update_customer_fields(self.stripe_id, **to_update)

        super().save(*args, **kwargs)

    def delete(self, *args, **kwargs):
        if self.stripe_id:
            stripe.Customer.delete(self.stripe_id)
            logger.info(f"Deleted Stripe customer {self.stripe_id}")
        super().delete(*args, **kwargs)

    def has_plan(self, plan):
        plan_list = [plan.name for plan in self.plans.all()]
        return plan in plan_list

    def get_notification_settings(self):
        return NotificationSettings.objects.get_or_create(user=self)[0]


class Session(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    request = models.CharField(max_length=255, null=True, blank=True)
    session = models.CharField(max_length=255, null=True, blank=True)
    subscription_id = models.CharField(max_length=255, null=True, blank=True)
    plan = models.ForeignKey(Plan, null=True, blank=True, on_delete=models.CASCADE)


class ContentBlock(models.Model):
    user = models.ForeignKey(User, on_delete=models.PROTECT)
    position = models.IntegerField()
    page = models.CharField(max_length=255, null=True, blank=True)
    title = models.CharField(max_length=255, null=True, blank=True)
    column1 = models.TextField(null=True, blank=True)
    column2 = models.TextField(null=True, blank=True)
    column3 = models.TextField(null=True, blank=True)
    image1 = models.CharField(max_length=255, null=True, blank=True)
    image2 = models.CharField(max_length=255, null=True, blank=True)
    image3 = models.CharField(max_length=255, null=True, blank=True)

    def __str__(self):
        return f"[{self.position}] {self.page} {self.title}"

    def save(self, *args, **kwargs):
        """
        Override the save function to  blank fields.
        """
        if self.column1 == "":
            self.column1 = None
        if self.column2 == "":
            self.column2 = None
        if self.column3 == "":
            self.column3 = None
        if self.image1 == "":
            self.image1 = None
        if self.image2 == "":
            self.image2 = None
        if self.image3 == "":
            self.image3 = None

        super().save(*args, **kwargs)


class Perms(models.Model):
    class Meta:
        permissions = (
            ("bypass_hashing", "Can bypass field hashing"),  #
            ("bypass_blacklist", "Can bypass the blacklist"),  #
            ("bypass_encryption", "Can bypass field encryption"),  #
            ("bypass_obfuscation", "Can bypass field obfuscation"),  #
            ("bypass_delay", "Can bypass data delay"),  #
            ("bypass_randomisation", "Can bypass data randomisation"),  #
            ("post_irc", "Can post to IRC"),
            ("post_discord", "Can post to Discord"),
            ("query_search", "Can search with query strings"),  #
            ("use_insights", "Can use the Insights page"),
            ("index_internal", "Can use the internal index"),
            ("index_meta", "Can use the meta index"),
            ("index_restricted", "Can use the restricted index"),
            ("restricted_sources", "Can access restricted sources"),
        )


class NotificationRule(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    name = models.CharField(max_length=255)
    enabled = models.BooleanField(default=True)
    data = models.TextField()

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

    def parse(self):
        try:
            parsed = load(self.data, Loader=Loader)
        except (ScannerError, ParserError) as e:
            raise ValueError(f"Invalid YAML: {e}")
        return parsed


class NotificationSettings(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    ntfy_topic = models.CharField(max_length=255, null=True, blank=True)
    ntfy_url = models.CharField(max_length=255, null=True, blank=True)

    def __str__(self):
        return f"Notification settings for {self.user}"