from rest_framework.decorators import action
from apps.utils.viewsets import CustomModelViewSet, CustomGenericViewSet
from apps.utils.mixins import CustomListModelMixin, RetrieveModelMixin, ComplexQueryMixin

from apps.wpmw.models import Wpr, WprDefect
from apps.wpmw.serializers import WprSerializer, WprNewSerializer, WprDetailSerializer, WproutListSerializer
from rest_framework.response import Response
from apps.mtm.models import Material
from rest_framework.exceptions import ParseError
from django.db import transaction


class WprViewSet(CustomListModelMixin, RetrieveModelMixin, ComplexQueryMixin, CustomGenericViewSet):
    """动态产品

    动态产品
    """
    perms_map = {"get": "*"}
    select_related_fields = ["wm", "mb", "material"]
    prefetch_related_fields = ["defects"]
    queryset = Wpr.objects.all()
    serializer_class = WprSerializer
    retrieve_serializer_class = WprDetailSerializer
    filterset_fields = {
        "mb": ["exact", "isnull"],
        "wm": ["exact", "isnull"],
        "material__process": ["exact"],
        "state": ["exact"],
        "defects": ["exact"],
        "number": ["exact"]
    }
    ordering = ["number", "create_time"]
    ordering_fields = ["number", "create_time", "update_time"]
    search_fields = ["number", "material__name", "material__model", "material__specification", "number_out"]

    def filter_queryset(self, queryset):
        qs = super().filter_queryset(queryset)
        if "mb__isnull" in self.request.query_params or "wm__isnull" in self.request.query_params:
            pass
        else:
            qs.exclude(mb=None, wm=None)
        return qs

    @action(methods=['post'], detail=False, perms_map={'post': '*'}, serializer_class=WprNewSerializer)
    def new_number(self, request, *args, **kwargs):
        """获取新的编号"""
        data = request.data
        year = data.get("year")
        month = data.get("month")
        material_start = data.get("material_start")
        wps_qs = Wpr.objects.filter(material_start=material_start, create_time__year=year, create_time__month=month).order_by("create_time")
        wpr_last = wps_qs.order_by("number").last()
        count = wps_qs.count()
        last_number = wpr_last.number if count > 0 else None
        last_number_count = int(last_number.split("-")[-1].lstrip('0'))
        mat = Material.objects.get(id=material_start)
        return Response({"count": count, "last_number": last_number, "material_model":mat.model, "last_number_count": last_number_count})
    
    @action(methods=['get'], detail=False, perms_map={'get': '*'})
    def number_out_last(self, request, *args, **kwargs):
        """获取最新的出库对外编号
        
        获取最新的出库对外编号(get请求传入prefix参数和with_unsubmit参数，with_unsubmit默认为yes，表示是否包含未出库的记录，prefix为前缀，如'WPR-2023-0)"""
        from apps.inm.models import MIOItemw
        prefix = request.query_params.get("prefix")
        with_unsubmit = request.query_params.get("with_unsubmit", "yes")
        wpr_qs_last = Wpr.objects.filter(number_out__startswith=prefix).order_by("number_out").last()
        number_outs = []
        if wpr_qs_last:
            number_outs.append(wpr_qs_last.number_out)
        # 查找未出库的记录
        if with_unsubmit == "yes":
            mioitemw_last = MIOItemw.objects.filter(
                mioitem__mio__submit_time__isnull=False, 
                number_out__isnull=False, number_out__startswith=prefix).order_by("number_out").last()
            if mioitemw_last:
                number_outs.extend(mioitemw_last.number_out)
        if number_outs:
            number_outs.sort()
            number_out_last = number_outs[-1]
            number_int_last = number_out_last.lstrip(prefix).lstrip('0')
            return Response({"number_out_last": number_out_last, "number_out_int_last": number_int_last})
        else:
            return Response({"number_out_last": None})
        

    @action(methods=['post'], detail=False, perms_map={'post': '*'}, serializer_class=WproutListSerializer)
    @transaction.atomic
    def assgin_number_out(self, request, *args, **kwargs):
        """分配出库对外编号

        分配出库对外编号"""
        sr = WproutListSerializer(data=request.data)
        sr.is_valid(raise_exception=True)
        vdata = sr.validated_data
        number_outs = [i["number_out"] for i in vdata]
        existing_numbers = Wpr.objects.filter(number_out__in=number_outs).values_list('number_out', flat=True)
        if existing_numbers.exists():
            used_numbers = list(existing_numbers)
            raise ParseError(f"以下对外编号已被使用: {used_numbers[0]} 共{len(used_numbers)}个")
        for i in vdata:
            wpr = Wpr.objects.get(id=i["id"])
            if wpr.number_out:
                raise ParseError(f"编号为{wpr.number}的产品已经分配了对外编号")
            wpr.number_out = i["number_out"]
            wpr.save()
        return Response()