"""D8 测试共享工具：URL 常量、用户/科室夹具、SMS 注入、载荷构建。"""

from django.core.cache import cache
from django.core.files.uploadedfile import SimpleUploadedFile
from django.test import TestCase, TransactionTestCase
from rest_framework.test import APIClient
from rest_framework_simplejwt.tokens import RefreshToken

from apps.user.models import User, Institution, Department, TeacherStudentRelation


class CacheTestCase(TestCase):
    """所有测试基类：setUp 自动 clear Redis，隔离 SMS 验证码/限流/JWT 黑名单。"""

    def setUp(self):
        super().setUp()
        cache.clear()


class CacheTransactionTestCase(TransactionTestCase):
    """事务测试基类：setUp 自动 clear Redis。"""

    def setUp(self):
        super().setUp()
        cache.clear()

# ─── URL 常量 ─────────────────────────────────────────────────────────────────

# 用户认证
USER_SEND_CODE_URL = '/api/user/auth/send-code/'
USER_REGISTER_URL = '/api/user/auth/register/'
USER_LOGIN_URL = '/api/user/auth/login/'
USER_LOGIN_CODE_URL = '/api/user/auth/login-code/'
USER_LOGOUT_URL = '/api/user/auth/logout/'
USER_REFRESH_URL = '/api/user/auth/refresh/'
USER_RESET_PWD_URL = '/api/user/auth/reset-password/'
USER_CHANGE_PWD_URL = '/api/user/users/change-password/'
USER_ME_URL = '/api/user/users/me/'
USER_LIST_URL = '/api/user/users/'
USER_INSTITUTION_LIST_URL = '/api/user/institution_list/'
USER_INSTITUTION_INFO_URL = '/api/user/institution_info/'
USER_MY_DEPARTMENTS_URL = '/api/user/my_departments/'
USER_PROFILE_CONFIG_URL = '/api/user/profile/config/'

# 病例
CASE_PARSE_URL = '/api/case/cases/parse-pdf/'
CASE_GENERATE_RULES_URL = '/api/case/cases/generate-scoring-rules/'
CASE_FULL_CREATE_URL = '/api/case/cases/full-create/'


def user_detail_url(user_id):
    return f'/api/user/users/{user_id}/'


def case_full_url(case_id):
    return f'/api/case/cases/{case_id}/full/'


# ─── SMS 注入 ─────────────────────────────────────────────────────────────────

def inject_sms_code(phone, scene, code='123456'):
    """直接将验证码写入 Redis，绕过 SMS 服务。"""
    cache.set(f'sms:{scene}:{phone}', code, timeout=300)


# ─── 默认测试机构 ─────────────────────────────────────────────────────────────

DEFAULT_INSTITUTION_CODE = 'TEST-HOSP-001'
DEFAULT_INSTITUTION_NAME = '测试医院'


# ─── 用户工具 ─────────────────────────────────────────────────────────────────

def create_test_user(phone='13900000001', password='TestPass1',
                     real_name='测试用户', role_type='student', status=1,
                     institution=None):
    """创建测试用户（已知密码），返回 User 实例。"""
    user = User.objects.create_user(
        username=phone,
        password=password,
        phone=phone,
        real_name=real_name,
        role_type=role_type,
        status=status,
        institution=institution,
    )
    return user


def get_tokens(user):
    """返回 {'access': '...', 'refresh': '...'} 字符串。"""
    refresh = RefreshToken.for_user(user)
    return {'access': str(refresh.access_token), 'refresh': str(refresh)}


def get_auth_client(user):
    """返回已携带 JWT Bearer 的 APIClient。"""
    tokens = get_tokens(user)
    client = APIClient()
    client.credentials(HTTP_AUTHORIZATION=f'Bearer {tokens["access"]}')
    return client


# ─── 师生关系 ─────────────────────────────────────────────────────────────────

def create_teacher_student_relation(teacher, student, status=1):
    """创建师生关系记录。"""
    return TeacherStudentRelation.objects.create(
        teacher=teacher,
        student=student,
        relation_type='指导',
        status=status,
    )


# ─── 科室工具 ─────────────────────────────────────────────────────────────────

def ensure_institution(name='测试医院', code='TEST-HOSP-001'):
    inst, _ = Institution.objects.get_or_create(
        code=code,
        defaults={'name': name, 'type': 'hospital', 'province': '北京', 'city': '北京'},
    )
    return inst


def ensure_department(name='儿科'):
    """科室为全局表，与机构无关。"""
    dept, _ = Department.objects.get_or_create(
        name=name,
        defaults={'category': '临床'},
    )
    return dept


# ─── 病例载荷构建 ─────────────────────────────────────────────────────────────

def sample_exam_items():
    """示例检查项（用于 C3 full-create）。"""
    return [
        {
            'item_code': 'blood_routine',
            'item_name': '血常规',
            'item_type': 'lab',
            'category': '实验室检查',
            'result_text': 'WBC 10×10^9/L',
            'result_structured': {'wbc': '10×10^9/L'},
            'is_key': True,
            'is_abnormal': False,
            'score_weight': 1.0,
            'display_order': 1,
        },
    ]


def build_traditional_payload(department_name='儿科', scoring_rules_count=2, with_exam_items=False):
    """构建合法的传统病例 full-create 载荷。"""
    rules = [
        {
            'dimension': f'测试维度{i + 1}',
            'score_weight': round(1.0 / scoring_rules_count, 2),
            'ai_auto_score': True,
            'scoring_standard': f'评分标准{i + 1}',
        }
        for i in range(scoring_rules_count)
    ]
    payload = {
        'title': '测试传统病例-表单录入',
        'case_type': 'traditional',
        'difficulty': 'medium',
        'chief_complaint': '发热 3 天',
        'description': '患儿，男，4 岁，因发热 3 天就诊。',
        'patient_age': 4,
        'patient_gender': 'male',
        'department_name': department_name,
        'estimated_minutes': 30,
        'osce_enabled': False,
        'tags': '儿科,发热',
        'traditional': {
            'standard_diagnosis': '上呼吸道感染',
            'standard_treatment': '对症治疗，退热处理',
            'guideline_reference': '《儿科学》第 9 版',
        },
        'scoring_rules': rules,
    }
    if with_exam_items:
        payload['exam_items'] = sample_exam_items()
    return payload


def build_teaching_payload(department_name='儿科', scoring_rules_count=2):
    """构建合法的教学病例 full-create 载荷。"""
    rules = [
        {
            'dimension': f'教学维度{i + 1}',
            'score_weight': round(1.0 / scoring_rules_count, 2),
            'ai_auto_score': False,
            'scoring_standard': f'教学评分标准{i + 1}',
        }
        for i in range(scoring_rules_count)
    ]
    return {
        'title': '测试教学病例-表单录入',
        'case_type': 'teaching',
        'difficulty': 'hard',
        'chief_complaint': '腹痛 2 天',
        'description': '患者，女，28 岁，因腹痛 2 天就诊。',
        'patient_age': 28,
        'patient_gender': 'female',
        'department_name': department_name,
        'estimated_minutes': 45,
        'osce_enabled': False,
        'teaching': {
            'teaching_goal': '掌握急腹症鉴别诊断',
            'discussion_questions': '如何鉴别急性阑尾炎与其他急腹症？',
            'teacher_guide': '引导学生按 SOAP 格式分析',
            'scoring_focus': '鉴别诊断思路',
        },
        'scoring_rules': rules,
    }


# ─── AI Mock 数据 ─────────────────────────────────────────────────────────────

MOCK_C1_PARSE_RESULT = {
    'data': {
        'title': 'Mock-儿科发热病例',
        'case_type': 'traditional',
        'difficulty': 'medium',
        'chief_complaint': '发热 3 天',
        'description': '患儿，男，4 岁，因发热 3 天就诊。',
        'patient_age': 4,
        'patient_gender': 'male',
        'department_name': '儿科',
        'estimated_minutes': 30,
        'osce_enabled': False,
        'tags': '儿科,发热',
        'traditional': {
            'standard_diagnosis': 'Mock 上呼吸道感染',
            'standard_treatment': 'Mock 对症治疗',
            'guideline_reference': 'Mock 指南',
        },
        'exam_items': [
            {
                'item_code': 'blood_routine',
                'item_name': '血常规',
                'item_type': 'lab',
                'category': '实验室检查',
                'result_text': 'WBC 10×10^9/L',
                'is_key': True,
                'is_abnormal': False,
                'score_weight': 1.0,
                'display_order': 1,
            },
        ],
    },
    'usage': {'prompt_tokens': 100, 'completion_tokens': 200, 'total_tokens': 300},
}

MOCK_C2_SCORING_RULES = {
    'data': {
        'scoring_rules': [
            {
                'dimension': '诊断准确性',
                'competency_dimension': '临床推理',
                'score_weight': 0.4,
                'ai_auto_score': True,
                'osce_dimension': False,
                'scoring_standard': '能准确判断上呼吸道感染',
            },
            {
                'dimension': '治疗方案合理性',
                'competency_dimension': '治疗决策',
                'score_weight': 0.3,
                'ai_auto_score': True,
                'osce_dimension': False,
                'scoring_standard': '治疗方案符合指南推荐',
            },
            {
                'dimension': '医患沟通',
                'competency_dimension': '沟通技巧',
                'score_weight': 0.3,
                'ai_auto_score': False,
                'osce_dimension': True,
                'scoring_standard': '能向家属解释病情和治疗方案',
            },
        ],
    },
    'usage': {'prompt_tokens': 150, 'completion_tokens': 250, 'total_tokens': 400},
}


def make_fake_pdf():
    """创建一个假 PDF 上传文件（仅用于触发 multipart 解析）。"""
    return SimpleUploadedFile(
        'test.pdf',
        b'%PDF-1.4 fake content for testing',
        content_type='application/pdf',
    )