import unittest

from fastapi import HTTPException
from fastapi.testclient import TestClient

from app.api.users import get_audit_log_service, get_user_service, require_current_user
from app.main import app


class StubAuditLogService:
    def __init__(self):
        self.events = []

    def record_event(self, **kwargs):
        self.events.append(kwargs)
        return kwargs


class StubUserService:
    def list_users(self, current_user, page, page_size):
        if current_user["role"] != "admin":
            raise HTTPException(status_code=403, detail="forbidden")
        return {
            "items": [
                {
                    "id": "user-123",
                    "tenant_id": current_user["tenant_id"],
                    "username": "member@example.com",
                    "display_name": "法务同事",
                    "role": "legal",
                    "status": "active",
                    "created_at": "2026-04-16T00:00:00+00:00",
                }
            ],
            "page": page,
            "page_size": page_size,
            "total": 1,
        }

    def create_user(self, current_user, username, display_name, password, role, status_value):
        if current_user["role"] != "admin":
            raise HTTPException(status_code=403, detail="forbidden")
        return {
            "id": "user-123",
            "tenant_id": current_user["tenant_id"],
            "username": username,
            "display_name": display_name,
            "role": role,
            "status": status_value,
            "created_at": "2026-04-16T00:00:00+00:00",
        }

    def update_user(self, current_user, user_id, username, display_name, password, role, status_value):
        if current_user["role"] != "admin":
            raise HTTPException(status_code=403, detail="forbidden")
        return {
            "id": user_id,
            "tenant_id": current_user["tenant_id"],
            "username": username,
            "display_name": display_name,
            "role": role,
            "status": status_value,
            "created_at": "2026-04-16T00:00:00+00:00",
        }


class UsersApiTestCase(unittest.TestCase):
    def setUp(self):
        self.audit_log_service = StubAuditLogService()
        app.dependency_overrides[get_user_service] = lambda: StubUserService()
        app.dependency_overrides[get_audit_log_service] = lambda: self.audit_log_service
        self.client = TestClient(app)

    def tearDown(self):
        app.dependency_overrides.clear()

    def test_admin_can_list_users(self):
        app.dependency_overrides[require_current_user] = lambda: {
            "id": "user-admin",
            "tenant_id": "tenant-demo-001",
            "role": "admin",
        }

        response = self.client.get("/api/v1/users")

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json()["data"]["items"][0]["username"], "member@example.com")

    def test_admin_can_create_user(self):
        app.dependency_overrides[require_current_user] = lambda: {
            "id": "user-admin",
            "tenant_id": "tenant-demo-001",
            "role": "admin",
        }

        response = self.client.post(
            "/api/v1/users",
            data={
                "username": "new.user@example.com",
                "display_name": "新同事",
                "password": "123456",
                "role": "legal",
                "status": "active",
            },
        )

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json()["data"]["display_name"], "新同事")
        self.assertEqual(self.audit_log_service.events[0]["action"], "create_user")
        self.assertEqual(
            self.audit_log_service.events[0]["detail_json"],
            {
                "username": "new.user@example.com",
                "display_name": "新同事",
                "role": "legal",
                "status": "active",
            },
        )


    def test_admin_can_update_user(self):
        app.dependency_overrides[require_current_user] = lambda: {
            "id": "user-admin",
            "tenant_id": "tenant-demo-001",
            "role": "admin",
        }

        response = self.client.put(
            "/api/v1/users/user-123",
            data={
                "username": "member@example.com",
                "display_name": "法务负责人",
                "password": "",
                "role": "business",
                "status": "disabled",
            },
        )

        self.assertEqual(response.status_code, 200)
        body = response.json()
        self.assertEqual(body["data"]["role"], "business")
        self.assertEqual(body["data"]["status"], "disabled")
        self.assertEqual(self.audit_log_service.events[0]["action"], "update_user")
        self.assertEqual(
            self.audit_log_service.events[0]["detail_json"],
            {
                "username": "member@example.com",
                "display_name": "法务负责人",
                "role": "business",
                "status": "disabled",
                "password_changed": False,
            },
        )

    def test_member_cannot_access_users(self):
        app.dependency_overrides[require_current_user] = lambda: {
            "id": "user-member",
            "tenant_id": "tenant-demo-001",
            "role": "member",
        }

        response = self.client.get("/api/v1/users")

        self.assertEqual(response.status_code, 403)
        self.assertEqual(response.json()["message"], "forbidden")


if __name__ == "__main__":
    unittest.main()