from django.db import models
from django.utils.translation import gettext_lazy as _
from filer.fields.image import FilerImageField


class NarratorLayer(models.Model):
    """
    Model for narrator layers/classes (Tabaqat)
    Represents the classification level of narrators in hadis chains
    """
    name = models.CharField(max_length=255, verbose_name=_('name'))
    number = models.PositiveIntegerField(verbose_name=_('layer number'), unique=True)
    description = models.TextField(verbose_name=_('description'), blank=True, null=True)

    created_at = models.DateTimeField(auto_now_add=True, verbose_name=_('created at'))
    updated_at = models.DateTimeField(auto_now=True, verbose_name=_('updated at'))

    class Meta:
        verbose_name = _('Narrator Layer')
        verbose_name_plural = _('Narrator Layers')
        ordering = ['number']

    def __str__(self):
        return f"{_('Layer')} {self.number} - {self.name}"


class Transmitters(models.Model):
    class ReliabilityLevel(models.TextChoices):
        VERY_RELIABLE = 'very_reliable', _('Very Reliable')
        RELIABLE = 'reliable', _('Reliable')
        ACCEPTABLE = 'acceptable', _('Acceptable')
        WEAK = 'weak', _('Weak')
        VERY_WEAK = 'very_weak', _('Very Weak')
        UNKNOWN = 'unknown', _('Unknown')

    class MadhhabChoices(models.TextChoices):
        SHIA = 'shia', _('Shia')
        SUNNI = 'sunni', _('Sunni')
        HANAFI = 'hanafi', _('Hanafi')
        MALIKI = 'maliki', _('Maliki')
        SHAFII = 'shafii', _('Shafi\'i')
        HANBALI = 'hanbali', _('Hanbali')
        OTHER = 'other', _('Other')
        UNKNOWN = 'unknown', _('Unknown')

    # Basic Information
    full_name = models.CharField(max_length=255, verbose_name=_('full name'))
    kunya = models.CharField(max_length=255, verbose_name=_('Kunya'), blank=True, null=True, help_text=_('e.g., Abu Abdullah'))
    known_as = models.CharField(max_length=255, verbose_name=_('Known As'), blank=True, null=True)
    nickname = models.CharField(max_length=255, verbose_name=_('Nickname/Laqab'), blank=True, null=True)

    # Geographic Information
    origin = models.CharField(max_length=255, verbose_name=_('Origin'), blank=True, null=True, help_text=_('Place of origin'))
    lived_in = models.CharField(max_length=255, verbose_name=_('Lived In'), blank=True, null=True, help_text=_('Places where they lived'))
    died_in = models.CharField(max_length=255, verbose_name=_('Died In'), blank=True, null=True, help_text=_('Place of death'))

    # Date Information
    birth_year_hijri = models.IntegerField(verbose_name=_("Birth Year (Hijri)"), null=True, blank=True)
    death_year_hijri = models.IntegerField(verbose_name=_("Death Year (Hijri)"), null=True, blank=True)
    age_at_death = models.PositiveIntegerField(verbose_name=_('Age at Death'), blank=True, null=True)

    # Religious & Academic Information
    reliability = models.CharField(
        max_length=20,
        choices=ReliabilityLevel.choices,
        default=ReliabilityLevel.UNKNOWN,
        verbose_name=_('Reliability Level')
    )
    madhhab = models.CharField(
        max_length=20,
        choices=MadhhabChoices.choices,
        default=MadhhabChoices.UNKNOWN,
        verbose_name=_('Madhhab/School of Thought')
    )

    # Presence in Famous Collections
    in_sahih_muslim = models.BooleanField(
        default=False,
        verbose_name=_('In Sahih Muslim'),
        help_text=_('Is this narrator present in Sahih Muslim?')
    )
    in_sahih_bukhari = models.BooleanField(
        default=False,
        verbose_name=_('In Sahih Bukhari'),
        help_text=_('Is this narrator present in Sahih Bukhari?')
    )

    # Additional Information
    description = models.TextField(blank=True, null=True, verbose_name=_("Description"))
    thumbnail = FilerImageField(
        related_name="+",
        on_delete=models.CASCADE,
        help_text=_('image allowed'),
        null=True,
        blank=True
    )

    created_at = models.DateTimeField(auto_now_add=True, verbose_name=_('created at'))
    updated_at = models.DateTimeField(auto_now=True, verbose_name=_('updated at'))

    class Meta:
        verbose_name = _('Transmitter')
        verbose_name_plural = _('Transmitters')
        ordering = ('full_name',)

    def __str__(self):
        return self.full_name



class HadisTransmitter(models.Model):
    class ReliabilityStatus(models.TextChoices):
        RELIABLE = 'reliable', _('Reliable')
        WEAK = 'weak', _('Weak')
        UNKNOWN = 'unknown', _('Unknown')

    hadis = models.ForeignKey(
        "hadis.Hadis",
        on_delete=models.CASCADE,
        verbose_name=_('hadis'),
        related_name='transmitters'
    )
    transmitter = models.ForeignKey(
        Transmitters,
        on_delete=models.CASCADE,
        verbose_name=_('transmitter'),
        related_name='hadises'
    )
    narrator_layer = models.ForeignKey(
        NarratorLayer,
        on_delete=models.SET_NULL,
        verbose_name=_('narrator layer'),
        related_name='transmitters',
        null=True,
        blank=True,
        help_text=_('The layer/class (Tabaqah) this narrator belongs to')
    )
    status = models.CharField(
        max_length=20,
        choices=ReliabilityStatus.choices,
        default=ReliabilityStatus.UNKNOWN,
        verbose_name=_('reliability status'),
        help_text=_('Reliability status of the narrator')
    )
    order = models.PositiveIntegerField(
        default=0,
        verbose_name=_('Order'),
        help_text=_('Order in the chain of transmission')
    )
    is_gap = models.BooleanField(default=False, verbose_name=_('is gap'))
    created_at = models.DateTimeField(auto_now_add=True, verbose_name=_('created at'))


    class Meta:
        verbose_name = _('Hadis Transmitter')
        verbose_name_plural = _('Hadis Transmitters')
        ordering = ('hadis', 'order')
        unique_together = ('hadis', 'transmitter', 'order')

    def __str__(self):
        layer_info = f" - {self.narrator_layer}" if self.narrator_layer else ""
        return f'{self.hadis.number} - {self.transmitter.full_name} ({self.order}){layer_info}'


class TransmitterOpinion(models.Model):
    """
    Model for scholarly opinions about transmitters
    """
    class OpinionStatus(models.TextChoices):
        CONFIRMED = 'confirmed', _('Confirmed')
        MIXED = 'mixed', _('Mixed')
        REJECTED = 'rejected', _('Rejected')

    transmitter = models.ForeignKey(
        Transmitters,
        on_delete=models.CASCADE,
        verbose_name=_('transmitter'),
        related_name='opinions'
    )
    scholar_name = models.CharField(
        max_length=255,
        verbose_name=_('Scholar Name'),
        help_text=_('Name of the scholar who gave this opinion')
    )
    opinion_text = models.TextField(
        verbose_name=_('Opinion Text'),
        help_text=_('The scholar\'s opinion about this transmitter')
    )
    status = models.CharField(
        max_length=20,
        choices=OpinionStatus.choices,
        default=OpinionStatus.CONFIRMED,
        verbose_name=_('Opinion Status'),
        help_text=_('Status of the opinion')
    )

    created_at = models.DateTimeField(auto_now_add=True, verbose_name=_('created at'))
    updated_at = models.DateTimeField(auto_now=True, verbose_name=_('updated at'))

    class Meta:
        verbose_name = _('Transmitter Opinion')
        verbose_name_plural = _('Transmitter Opinions')
        ordering = ('-created_at',)

    def __str__(self):
        return f"{self.scholar_name}'s opinion on {self.transmitter.full_name} ({self.status})"