"""CMS 师生关系管理测试：CMS-REL-1~4（医院管理员本院 / 超管全平台）。"""
import io

from openpyxl import Workbook
from django.core.files.uploadedfile import SimpleUploadedFile
from rest_framework.test import APIClient

from apps.user.models import TeacherStudentRelation
from .conftest import CacheTestCase, create_test_user, get_auth_client, ensure_institution

REL_URL = '/api/cms/teacher-student-relations/'
XLSX_CT = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'


def rel_detail(pk):
    return f'/api/cms/teacher-student-relations/{pk}/'


def rel_disable(pk):
    return f'/api/cms/teacher-student-relations/{pk}/disable/'  # 停用：POST（原 DELETE /{id}/）


def make_xlsx(headers, rows):
    wb = Workbook(); ws = wb.active
    ws.append(headers)
    for r in rows:
        ws.append(r)
    buf = io.BytesIO(); wb.save(buf); buf.seek(0)
    return SimpleUploadedFile('rel.xlsx', buf.read(), content_type=XLSX_CT)


class CmsRelationTest(CacheTestCase):
    def setUp(self):
        super().setUp()
        self.inst = ensure_institution(name='本院', code='REL-A')
        self.other = ensure_institution(name='他院', code='REL-B')
        self.admin = create_test_user(phone='13932000001', role_type='hospital_admin', institution=self.inst)
        self.client = get_auth_client(self.admin)
        self.doc = create_test_user(phone='13932000002', role_type='doctor', institution=self.inst)
        self.stu = create_test_user(phone='13932000003', role_type='student', institution=self.inst)
        self.other_stu = create_test_user(phone='13932000004', role_type='student', institution=self.other)

    def test_permission(self):
        self.assertEqual(APIClient().get(REL_URL).status_code, 401)
        stu_client = get_auth_client(self.stu)
        self.assertEqual(stu_client.get(REL_URL).status_code, 403)

    def test_create_and_list(self):
        resp = self.client.post(REL_URL, {'teacher': self.doc.id, 'student': self.stu.id})
        self.assertEqual(resp.status_code, 201, resp.content)
        self.assertEqual(resp.json()['teacher_phone'], '13932000002')
        self.assertEqual(resp.json()['student_phone'], '13932000003')
        # 列表
        resp = self.client.get(REL_URL)
        self.assertEqual(resp.status_code, 200)
        self.assertEqual(len(resp.json()['results']), 1)

    def test_create_duplicate(self):
        self.client.post(REL_URL, {'teacher': self.doc.id, 'student': self.stu.id})
        resp = self.client.post(REL_URL, {'teacher': self.doc.id, 'student': self.stu.id})
        self.assertEqual(resp.status_code, 400, resp.content)
        self.assertEqual(resp.json()['code'], 'CMS_REL_EXISTS')

    def test_teacher_must_be_doctor(self):
        # 用学生当 teacher → 无效 pk
        resp = self.client.post(REL_URL, {'teacher': self.stu.id, 'student': self.stu.id})
        self.assertEqual(resp.status_code, 400, resp.content)

    def test_scope_other_institution_student_rejected(self):
        resp = self.client.post(REL_URL, {'teacher': self.doc.id, 'student': self.other_stu.id})
        self.assertEqual(resp.status_code, 403, resp.content)
        self.assertEqual(resp.json()['code'], 'CMS_REL_SCOPE_FORBIDDEN')

    def test_soft_delete(self):
        r = TeacherStudentRelation.objects.create(teacher=self.doc, student=self.stu, status=1)
        resp = self.client.post(rel_disable(r.id))
        self.assertEqual(resp.status_code, 200, resp.content)
        self.assertFalse(TeacherStudentRelation.objects.filter(id=r.id).exists())
        self.assertTrue(TeacherStudentRelation.all_objects.get(id=r.id).is_deleted)

    def test_import_and_export(self):
        f = make_xlsx(['带教医生手机号', '学生手机号'], [
            ['13932000002', '13932000003'],   # ✅
            ['13932000002', '13932000004'],   # 学生他院 → 失败
            ['00000000000', '13932000003'],   # 医生不存在 → 失败
        ])
        resp = self.client.post('/api/cms/teacher-student-relations/import/', {'file': f}, format='multipart')
        self.assertEqual(resp.status_code, 200, resp.content)
        body = resp.json()
        self.assertEqual(body['success'], 1)
        self.assertEqual(body['failed'], 2)
        # 导出
        resp = self.client.get('/api/cms/teacher-student-relations/export/')
        self.assertEqual(resp.status_code, 200)
        self.assertEqual(resp['Content-Type'], XLSX_CT)

    def test_list_scoped_to_own(self):
        # 他院的师生关系不可见
        other_doc = create_test_user(phone='13932000005', role_type='doctor', institution=self.other)
        TeacherStudentRelation.objects.create(teacher=other_doc, student=self.other_stu, status=1)
        TeacherStudentRelation.objects.create(teacher=self.doc, student=self.stu, status=1)
        resp = self.client.get(REL_URL)
        self.assertEqual(len(resp.json()['results']), 1)   # 只看到本院那条