from rest_framework import serializers
from .models import flowModel
from container.models import MaterialChangeHistory,batchLogModel,ContainerDetailLogModel
from decimal import Decimal



class MaterialChangeHistorySerializer(serializers.ModelSerializer):
    class Meta:
        model = MaterialChangeHistory
        fields = '__all__'

class batchLogSerializer(serializers.ModelSerializer):
    
    # 定义批次日志的序列化器，用于获取操作，字段只读
    bound_code = serializers.SerializerMethodField()
    batch_code = serializers.CharField(source='batch.bound_number', read_only=True)
    goods_unit = serializers.CharField(source='batch.goods_unit', read_only=True)
    check_status = serializers.IntegerField(source='batch.check_status', read_only=True)
    create_time = serializers.DateTimeField(format='%Y-%m-%d %H:%M', required=False)
    class Meta:
        # 指定模型和排除字段
        model = batchLogModel
        fields= '__all__'
        read_only_fields = ['id']

    def get_bound_code(self, obj):
        """ 动态序列化关联的批次数据 """
        return obj.bound.bound_code if obj.bound else '无主单，涉及手动操作'

class ContainerDetailLogSerializer(serializers.ModelSerializer):
    batch = serializers.SerializerMethodField()
    container_code = serializers.SerializerMethodField()
    goods_code = serializers.SerializerMethodField()
    goods_desc = serializers.SerializerMethodField()
    detail_goods_qty = serializers.SerializerMethodField()
    goods_qty = serializers.SerializerMethodField()
    goods_out_qty = serializers.SerializerMethodField()

    batch_goods_qty = serializers.SerializerMethodField() #计划入库数量 
    batch_goods_in_qty = serializers.SerializerMethodField() #实际入库数量 
    batch_goods_in_location_qty = serializers.SerializerMethodField() #实际在库数量 
    batch_goods_out_qty = serializers.SerializerMethodField()
    create_time = serializers.DateTimeField(format='%Y-%m-%d %H:%M', required=False)
    class Meta:
        # 指定模型和排除字段
        model = ContainerDetailLogModel
        fields= '__all__'
        read_only_fields = ['id']

    def get_batch(self, obj):
        """ 动态序列化关联的批次数据 """
        return obj.container_detail.batch.bound_number if obj.container_detail.batch else 'N/A'
    def get_container_code(self, obj):
        return obj.container_detail.container.container_code if obj.container_detail.container.container_code else 'N/A'
    def get_goods_code(self, obj):
        return obj.container_detail.goods_code if obj.container_detail.goods_code else 'N/A'
    def get_goods_desc(self, obj):
        return obj.container_detail.goods_desc if obj.container_detail.goods_desc else 'N/A'
    
    # 获取托盘最小单元detail的入库数量
    def get_detail_goods_qty(self, obj):
        return obj.container_detail.goods_qty if obj.container_detail.goods_qty else Decimal('0')
    
    # 获取托盘最小单元detail的 入库操作数量
    def get_goods_qty(self, obj):
       
        new_goods_qty = obj.new_goods_qty if obj.new_goods_qty else Decimal('0')
        old_goods_qty = obj.old_goods_qty if obj.old_goods_qty else Decimal('0')

        goods_qty = new_goods_qty - old_goods_qty
        return goods_qty if goods_qty else Decimal('0')
    
    # 获取托盘最小单元detail的 出库操作数量
    def get_goods_out_qty(self, obj):
        
        new_goods_out_qty = obj.new_goods_out_qty if obj.new_goods_out_qty else Decimal('0')
        old_goods_out_qty = obj.old_goods_out_qty if obj.old_goods_out_qty else Decimal('0')
        goods_out_qty = new_goods_out_qty - old_goods_out_qty
        return goods_out_qty if goods_out_qty else Decimal('0')
    
    # 获取批次的计划入库数量
    def get_batch_goods_qty(self, obj):
        return obj.container_detail.batch.goods_qty if obj.container_detail.batch.goods_qty else Decimal('0')
    # 获取批次的实际入库数量
    def get_batch_goods_in_qty(self, obj):
        return obj.container_detail.batch.goods_in_qty if obj.container_detail.batch.goods_in_qty else Decimal('0')
    # 获取批次的实际在库数量
    def get_batch_goods_in_location_qty(self, obj):
        return obj.container_detail.batch.goods_in_location_qty if obj.container_detail.batch.goods_in_location_qty else Decimal('0')
    # 获取批次的出库数量
    def get_batch_goods_out_qty(self, obj):
        return obj.container_detail.batch.goods_out_qty if obj.container_detail.batch.goods_out_qty else Decimal('0')

class flowSerializer(serializers.ModelSerializer):
    problematic_field = serializers.IntegerField(allow_null=True)
    class Meta:
        model = flowModel
        fields = '__all__'