from apps.utils.serializers import CustomModelSerializer
from apps.mtm.models import Shift, Material, Mgroup, Team, Goal, Process, Route
from apps.utils.constants import EXCLUDE_FIELDS
from rest_framework import serializers
from rest_framework.exceptions import ValidationError
from apps.system.models import Dept
from django.db import transaction


class ShiftSerializer(CustomModelSerializer):
    class Meta:
        model = Shift
        fields = '__all__'
        read_only_fields = EXCLUDE_FIELDS


class MaterialSimpleSerializer(CustomModelSerializer):
    class Meta:
        model = Material
        fields = ['id', 'name', 'number', 'specification', 'type', 'cate']


class MaterialSerializer(CustomModelSerializer):
    process_name = serializers.CharField(source='process.name', read_only=True)

    class Meta:
        model = Material
        fields = '__all__'
        read_only_fields = EXCLUDE_FIELDS


class MgroupSerializer(CustomModelSerializer):
    belong_dept = serializers.PrimaryKeyRelatedField(
        label="所属部门", queryset=Dept.objects.all(), required=True)
    belong_dept_name = serializers.CharField(
        source='belong_dept.name', read_only=True)
    process_name = serializers.CharField(source='process.name', read_only=True)
    process_cate = serializers.CharField(source='process.cate', read_only=True)

    class Meta:
        model = Mgroup
        fields = '__all__'
        read_only_fields = EXCLUDE_FIELDS


class TeamSerializer(CustomModelSerializer):
    belong_dept = serializers.PrimaryKeyRelatedField(
        label="所属部门", queryset=Dept.objects.all(), required=True)
    leader_name = serializers.CharField(source='leader.name', read_only=True)
    belong_dept_name = serializers.CharField(
        source='belong_dept.name', read_only=True)

    class Meta:
        model = Team
        fields = '__all__'
        read_only_fields = EXCLUDE_FIELDS


class GoalSerializer(CustomModelSerializer):
    goal_cate_name = serializers.CharField(
        source='goal_cate.name', read_only=True)
    mgroup_name = serializers.CharField(source='mgroup.name', read_only=True)

    class Meta:
        model = Goal
        fields = '__all__'
        read_only_fields = EXCLUDE_FIELDS


class MgroupGoalYearSerializer(serializers.Serializer):
    mgroup = serializers.CharField(label='ID或名称')
    year = serializers.IntegerField(label='年')


class ProcessSerializer(CustomModelSerializer):
    belong_dept_name = serializers.CharField(
        source='belong_dept.name', read_only=True)

    class Meta:
        model = Process
        fields = '__all__'
        read_only_fields = EXCLUDE_FIELDS


class RouteSerializer(CustomModelSerializer):
    material_ = MaterialSerializer(source='material', read_only=True)
    process_name = serializers.CharField(source='process.name', read_only=True)
    process_cate = serializers.CharField(source='process.cate', read_only=True)
    material_in_name = serializers.CharField(
        source='material_in.name', read_only=True)
    material_out_name = serializers.CharField(
        source='material_out.name', read_only=True)
    material_out_type = serializers.CharField(
        source='material_out.type', read_only=True)
    material_out_is_hidden = serializers.BooleanField(
        source='material_out.is_hidden', read_only=True)

    class Meta:
        model = Route
        fields = '__all__'
        read_only_fields = EXCLUDE_FIELDS

    # def validate(self, attrs):
    #     material = attrs['material']
    #     if material.type != Material.MA_TYPE_GOOD:
    #         raise ValidationError('请选择最终产品')
    #     return super().validate(attrs)

    def gen_material_out(self, instance):
        """
        废弃不用了
        """
        name = f'{instance.material.name}-中'
        instance.material_out, _ = Material.objects.get_or_create(type=Material.MA_TYPE_HALFGOOD, parent=instance.material, process=instance.process,
                                                                  defaults={'parent': instance.material, 'process': instance.process,
                                                                            'is_hidden': True, 'name': name,
                                                                            'number': instance.material.number,
                                                                            'specification': instance.material.specification,
                                                                            'type': Material.MA_TYPE_HALFGOOD,
                                                                            'create_by': self.request.user,
                                                                            'update_by': self.request.user,
                                                                            })
        instance.save()

    def create(self, validated_data):
        process = validated_data.get('process', None)
        if process and Route.objects.filter(material=validated_data['material'], process=process).exists():
            raise ValidationError('已选择该工序')
        with transaction.atomic():
            instance = super().create(validated_data)
            # if 'material_out' in validated_data and validated_data['material_out'] and instance.material:
            #     pass
            # else:
            #     self.gen_material_out(instance)
            return instance

    def update(self, instance, validated_data):
        validated_data.pop('material', None)
        validated_data.pop('process', None)
        with transaction.atomic():
            instance = super().update(instance, validated_data)
            # if 'material_out' in validated_data and validated_data['material_out'] and instance.material:
            #     pass
            # else:
            #     self.gen_material_out(instance)
            return instance