from rest_framework import serializers
from .models import OrderItemModel, OrderModel, DiscountCode
from product.serializers import ProductVariantSerialzier, AttributeValueSerialzier, ProductImageSerailizer
from account.serializers import UserAddressSerializer
from product.models import ProductVariant

class ProductVariantSerialzier(serializers.ModelSerializer):
    product_attributes = AttributeValueSerialzier(many=True)
    image = serializers.SerializerMethodField()
    discount_amount = serializers.SerializerMethodField()
    title = serializers.SerializerMethodField()
    price = serializers.SerializerMethodField()
    final_price = serializers.SerializerMethodField()
    category = serializers.SerializerMethodField()
    class Meta:
        model = ProductVariant
        fields = ['title', 'product_attributes', 'in_stock', 'price', 'discount', 'color', 'image', 'discount_amount', 'category', 'final_price']

    def get_discount_amount(self, obj):
        discount_amount  = int(obj.price * (obj.discount / 100))
        return f'{discount_amount:,.0f} تومان'

    def get_final_price(self, obj):
        final_price = obj.price - int(obj.price * (obj.discount / 100))
        return f'{final_price:,.0f} تومان'

    def get_price(self, obj):
        return f'{obj.price:,.0f} تومان'

    def get_image(self, obj):
        return self.context.get('request').build_absolute_uri(obj.images.all().first().image.url)

    def get_title(self, obj):
        return obj.product.name

    def get_category(self, obj):
        return obj.product.category.name


class DiscountCodeSerializer(serializers.ModelSerializer):
    class Meta:
        model = DiscountCode
        fields = ('code', 'percent')
        read_only_fields = ('percent',)


class OrderItemSerailzier(serializers.ModelSerializer):
    product = serializers.SerializerMethodField()
    class Meta:
        model = OrderItemModel
        exclude = ('price', 'order')
        read_only_fields = ('order', 'product', )
    def get_product(self, obj):
        return ProductVariantSerialzier(instance=obj.product, context={'request': self.context.get('request')}).data




class CartSerializer(serializers.ModelSerializer):
    items = OrderItemSerailzier(many=True)
    cart_total = serializers.SerializerMethodField()
    tax = serializers.SerializerMethodField()
    final_price = serializers.SerializerMethodField()
    discount_code = serializers.SerializerMethodField()
    class Meta:
        model = OrderModel
        fields = [ 'discount_code', 'items', 'cart_total', 'tax', 'final_price']


    def get_discount_code(self, obj):
        if obj.discount_code:
            return {
                'code': f'{obj.discount_code.code}',
                'percent': obj.discount_code.percent,
                'amount': f'{10000:,.0f} تومان'
            }
        else:
            return None





    def get_tax(self, obj):
        return f'{1000:,.0f} تومان'

    def get_cart_total(self, obj):

        return f'{10000:,.0f} تومان'
    def get_final_price(self, obj):

        return f'{8000:,.0f} تومان'
    

class OrderSerializer(serializers.ModelSerializer):
    count =  serializers.SerializerMethodField()
    images =  serializers.SerializerMethodField()
    address = UserAddressSerializer()
    items = OrderItemSerailzier(many=True)
    class Meta:
        model = OrderModel
        fields = ['address', 'created_at', 'items', 'status', 'discount_code', "images", "count", "id"]

    def get_count(self, obj):
        return obj.items.all().count()

    def get_images(self, obj):
        image_list = [
            self.context.get('request').build_absolute_uri(image.image.url)
            if (image := item.product.images.all().first()) else None
            for item in obj.items.all()[:3]
        ]
        return filter(lambda x: x is not None, image_list)