"""子客服专用：派单模板 / 链接（独立路径；读模板用 merchant_id，写模板需 template_manage）。"""
from rest_framework.permissions import IsAuthenticated
from rest_framework.response import Response
from rest_framework.views import APIView

from config.views import (
    ShangjiaTianjiaMobanView,
    ShangjiaGengxinMobanView,
    ShangjiaShanchuMobanView,
    ShangjiaGenerateLinkView,
    ShangjiaLianjieListView,
)
from merchant_ops.helpers import proxy_as_merchant_user
from merchant_ops.services.authz import StaffAuthError, get_active_staff_member, member_has_perm
from merchant_ops.services.template_query import list_merchant_templates
from merchant_ops.views_manage import _err


def _require_staff(request):
    member = get_active_staff_member(request.user)
    if not member:
        raise StaffAuthError(403, '非有效子客服')
    return member


def _can_read_templates(member):
    """派单发常规单需读模板；改模板需 template_manage。"""
    return member_has_perm(member, 'order_dispatch') or member_has_perm(member, 'template_manage')


class StaffTemplateListView(APIView):
    """读商家全部模板（UserID=merchant_id），有 order_dispatch 即可。"""

    permission_classes = [IsAuthenticated]

    def post(self, request):
        try:
            member = _require_staff(request)
            if not _can_read_templates(member):
                raise StaffAuthError(403, '无权限查看模板')
            payload, http_status = list_merchant_templates(member.merchant_id, request.data)
            return Response(payload, status=http_status)
        except Exception as e:
            return _err(e)


class StaffTemplateCreateView(APIView):
    permission_classes = [IsAuthenticated]

    def post(self, request):
        try:
            member = _require_staff(request)
            if not member_has_perm(member, 'template_manage'):
                raise StaffAuthError(403, '无权限添加模板')
            return proxy_as_merchant_user(request, member, ShangjiaTianjiaMobanView, 'template_manage')
        except Exception as e:
            return _err(e)


class StaffTemplateUpdateView(APIView):
    permission_classes = [IsAuthenticated]

    def post(self, request):
        try:
            member = _require_staff(request)
            if not member_has_perm(member, 'template_manage'):
                raise StaffAuthError(403, '无权限修改模板')
            return proxy_as_merchant_user(request, member, ShangjiaGengxinMobanView, 'template_manage')
        except Exception as e:
            return _err(e)


class StaffTemplateDeleteView(APIView):
    permission_classes = [IsAuthenticated]

    def post(self, request):
        try:
            member = _require_staff(request)
            if not member_has_perm(member, 'template_manage'):
                raise StaffAuthError(403, '无权限删除模板')
            return proxy_as_merchant_user(request, member, ShangjiaShanchuMobanView, 'template_manage')
        except Exception as e:
            return _err(e)


class StaffLinkGenerateView(APIView):
    permission_classes = [IsAuthenticated]

    def post(self, request):
        try:
            member = _require_staff(request)
            return proxy_as_merchant_user(request, member, ShangjiaGenerateLinkView, 'order_dispatch')
        except Exception as e:
            return _err(e)


class StaffLinkListView(APIView):
    permission_classes = [IsAuthenticated]

    def post(self, request):
        try:
            member = _require_staff(request)
            return proxy_as_merchant_user(request, member, ShangjiaLianjieListView, 'order_dispatch')
        except Exception as e:
            return _err(e)