from rest_framework import serializers
from django.utils.translation import gettext_lazy as _

from ..models import (
    Hadis, HadisStatus, HadisTag, HadisTransmitter,
    HadisReference, ReferenceImage, Transmitters, HadisCollection
)
from apps.library.serializers import BookSerializer


class HadisCollectionListSerializer(serializers.ModelSerializer):
    thumbnail = serializers.SerializerMethodField()

    class Meta:
        model = HadisCollection
        fields = ['id', 'title', 'slug', 'thumbnail']

    def get_thumbnail(self, obj):
        if obj.thumbnail:
            request = self.context.get('request')
            if request:
                return request.build_absolute_uri(obj.thumbnail.url)
            return obj.thumbnail.url
        return None


class HadisSyncSerializer(serializers.ModelSerializer):
    """Serializer for syncing all hadis data"""
    translations = serializers.SerializerMethodField()
    hadis_status = serializers.SerializerMethodField()
    tags = serializers.SerializerMethodField()
    
    class Meta:
        model = Hadis
        fields = [
            'id', 'number', 'category_id', 'title', 'title_narrator',
            'text', 'translations', 'explanation', 'address',
            'hadis_status', 'hadis_status_text', 'share_link', 'tags', 'links'
        ]
    
    def get_translations(self, obj):
        """Get all translations"""
        translations_dict = {}
        if obj.translation and isinstance(obj.translation, list):
            for tr in obj.translation:
                if isinstance(tr, dict):
                    lang_code = tr.get('language_code')
                    title = tr.get('title')
                    if lang_code:
                        translations_dict[lang_code] = title
        return translations_dict
    
    def get_hadis_status(self, obj):
        """Get hadis status info"""
        if obj.hadis_status:
            return {
                'id': obj.hadis_status.id,
                'title': obj.hadis_status.title,
                'color': obj.hadis_status.color
            }
        return None
    
    def get_tags(self, obj):
        """Get tags"""
        return [{'id': tag.id, 'title': tag.title} for tag in obj.tags.all()]


class HadisListSerializer(serializers.ModelSerializer):
    """Serializer for Hadis list"""
    category = serializers.SerializerMethodField()
    translation = serializers.SerializerMethodField()
    
    class Meta:
        model = Hadis
        fields = ['id', 'number', 'title', 'text' ,'category', 'translation']
    
    def get_category(self, obj):
        """Get category id and title"""
        if obj.category:
            return {
                'id': obj.category.id,
                'title': obj.category.title
            }
        return None
    
    def get_translation(self, obj):
        """Get translation based on request language"""
        request = self.context.get('request')
        language_code = getattr(request, 'LANGUAGE_CODE', 'en')
        return obj.get_translation(language_code)


class HadisStatusSerializer(serializers.ModelSerializer):
    """Serializer for HadisStatus"""

    class Meta:
        model = HadisStatus
        fields = ['id', 'title', 'color']


class HadisTagSerializer(serializers.ModelSerializer):
    """Serializer for HadisTag"""

    class Meta:
        model = HadisTag
        fields = ['id', 'title']


class TransmitterSerializer(serializers.ModelSerializer):
    """Serializer for Transmitters"""

    class Meta:
        model = Transmitters
        fields = [
            'id', 'full_name', 'birth_year_hijri', 'death_year_hijri',
            'description'
        ]


class HadisTransmitterSerializer(serializers.ModelSerializer):
    """Serializer for HadisTransmitter with transmitter details"""
    transmitter = TransmitterSerializer(read_only=True)

    class Meta:
        model = HadisTransmitter
        fields = [
            'id', 'transmitter', 'order', 'is_gap'
        ]


class ReferenceImageSerializer(serializers.ModelSerializer):
    """Serializer for ReferenceImage"""
    thumbnail = serializers.SerializerMethodField()

    class Meta:
        model = ReferenceImage
        fields = ['id', 'thumbnail', 'priority']

    def get_thumbnail(self, obj):
        """Get thumbnail URL"""
        if obj.image:
            request = self.context.get('request')
            if request:
                return request.build_absolute_uri(obj.image.url)
            return obj.image.url
        return None


class HadisReferenceSerializer(serializers.ModelSerializer):
    """Serializer for HadisReference with book and images"""
    book = BookSerializer(read_only=True)
    images = ReferenceImageSerializer(many=True, read_only=True)

    class Meta:
        model = HadisReference
        fields = [
            'id', 'book', 'page_number', 'hadis_number_in_book',
            'description', 'images'
        ]


class HadisDetailSerializer(serializers.ModelSerializer):
    """Detailed serializer for Hadis with all related objects"""
    hadis_status = HadisStatusSerializer(read_only=True)
    tags = HadisTagSerializer(many=True, read_only=True)
    transmitters = HadisTransmitterSerializer(
        source='hadistransmitter_set',
        many=True,
        read_only=True
    )
    references = HadisReferenceSerializer(
        source='hadisreference_set',
        many=True,
        read_only=True
    )
    category = serializers.SerializerMethodField()
    translation = serializers.SerializerMethodField()

    class Meta:
        model = Hadis
        fields = [
            'id', 'number', 'title', 'text', 'translation', 'explanation',
            'address', 'hadis_status_text', 'links', 'status',
            'category', 'hadis_status', 'tags', 'transmitters', 'references'
        ]

    def get_category(self, obj):
        """Get category details"""
        if obj.category:
            return {
                'id': obj.category.id,
                'title': obj.category.title,
                'category_type': obj.category.category_type
            }
        return None

    def get_translation(self, obj):
        """Get translation based on request language"""
        request = self.context.get('request')
        language_code = getattr(request, 'LANGUAGE_CODE', 'en')
        return obj.get_translation(language_code)