"""
用户管理 API 测试（依据 API 文档 2.2 节）

仅管理员可创建、修改、删除用户。测试对已启动服务发起 HTTP 请求，使用 admin token。
"""
import uuid


def _auth_header(token: str) -> dict:
    return {"Authorization": f"Bearer {token}"}


# ---------- POST /api/users/create ----------


def test_users_create_without_token_returns_401(client):
    """创建用户无 token 时返回 401"""
    r = client.post(
        "/api/users/create",
        json={"username": "u1", "password": "123456", "role": "工程部"},
    )
    assert r.status_code == 401


def test_users_create_non_admin_returns_403(client, engineer_token):
    """非管理员创建用户返回 403"""
    r = client.post(
        "/api/users/create",
        headers=_auth_header(engineer_token),
        json={"username": "u_engineer_cannot", "password": "123456", "role": "工程部"},
    )
    assert r.status_code == 403
    assert r.json().get("code") == 403


def test_users_create_admin_returns_201_with_id_and_message(client, auth_token):
    """管理员创建用户返回 201 且包含 id 和 message「创建成功」"""
    username = f"testuser_create_{uuid.uuid4().hex[:8]}"
    r = client.post(
        "/api/users/create",
        headers=_auth_header(auth_token),
        json={
            "username": username,
            "password": "123456",
            "role": "技经部",
            "displayName": "测试创建用户",
        },
    )
    assert r.status_code == 201
    body = r.json()
    assert "id" in body
    assert body.get("message") == "创建成功"


def test_users_create_missing_username_returns_400(client, auth_token):
    """创建用户缺少 username 时返回 400"""
    r = client.post(
        "/api/users/create",
        headers=_auth_header(auth_token),
        json={"password": "123456", "role": "工程部"},
    )
    assert r.status_code == 400
    assert r.json().get("code") == 400


def test_users_create_missing_password_returns_400(client, auth_token):
    """创建用户缺少 password 时返回 400"""
    r = client.post(
        "/api/users/create",
        headers=_auth_header(auth_token),
        json={"username": "testuser_nopwd", "role": "工程部"},
    )
    assert r.status_code == 400
    assert r.json().get("code") == 400


def test_users_create_missing_role_returns_400(client, auth_token):
    """创建用户缺少 role 时返回 400"""
    r = client.post(
        "/api/users/create",
        headers=_auth_header(auth_token),
        json={"username": "testuser_norole", "password": "123456"},
    )
    assert r.status_code == 400
    assert r.json().get("code") == 400


# ---------- POST /api/users/update ----------


def test_users_update_without_token_returns_401(client):
    """更新用户无 token 时返回 401"""
    r = client.post("/api/users/update", json={"id": "any-id"})
    assert r.status_code == 401


def test_users_update_non_admin_returns_403(client, engineer_token, auth_token):
    """非管理员更新用户返回 403"""
    username = f"testuser_for_update_{uuid.uuid4().hex[:8]}"
    create_r = client.post(
        "/api/users/create",
        headers=_auth_header(auth_token),
        json={"username": username, "password": "123456", "role": "财务部"},
    )
    assert create_r.status_code == 201
    uid = create_r.json()["id"]
    r = client.post(
        "/api/users/update",
        headers=_auth_header(engineer_token),
        json={"id": uid, "displayName": "不应成功"},
    )
    assert r.status_code == 403
    assert r.json().get("code") == 403


def test_users_update_admin_returns_200_with_id_and_message(client, auth_token):
    """管理员更新用户返回 200 且包含 id 和 message「保存成功」"""
    username = f"testuser_update_{uuid.uuid4().hex[:8]}"
    create_r = client.post(
        "/api/users/create",
        headers=_auth_header(auth_token),
        json={"username": username, "password": "123456", "role": "物贸部"},
    )
    assert create_r.status_code == 201
    uid = create_r.json()["id"]
    r = client.post(
        "/api/users/update",
        headers=_auth_header(auth_token),
        json={"id": uid, "displayName": "更新后的显示名", "role": "财务部"},
    )
    assert r.status_code == 200
    body = r.json()
    assert body.get("id") == uid
    assert body.get("message") == "保存成功"


def test_users_update_nonexistent_returns_404(client, auth_token):
    """更新不存在用户返回 404"""
    r = client.post(
        "/api/users/update",
        headers=_auth_header(auth_token),
        json={"id": "non-existent-user-id", "displayName": "任意"},
    )
    assert r.status_code == 404
    assert r.json().get("code") == 404


# ---------- POST /api/users/delete ----------


def test_users_delete_without_token_returns_401(client):
    """删除用户无 token 时返回 401"""
    r = client.post("/api/users/delete", json={"id": "any-id"})
    assert r.status_code == 401


def test_users_delete_non_admin_returns_403(client, engineer_token, auth_token):
    """非管理员删除用户返回 403"""
    username = f"testuser_for_del_{uuid.uuid4().hex[:8]}"
    create_r = client.post(
        "/api/users/create",
        headers=_auth_header(auth_token),
        json={"username": username, "password": "123456", "role": "工程部"},
    )
    assert create_r.status_code == 201
    uid = create_r.json()["id"]
    r = client.post(
        "/api/users/delete",
        headers=_auth_header(engineer_token),
        json={"id": uid},
    )
    assert r.status_code == 403
    assert r.json().get("code") == 403


def test_users_delete_admin_returns_200_with_message(client, auth_token):
    """管理员删除用户返回 200 且 message「删除成功」"""
    username = f"testuser_delete_{uuid.uuid4().hex[:8]}"
    create_r = client.post(
        "/api/users/create",
        headers=_auth_header(auth_token),
        json={"username": username, "password": "123456", "role": "工程部"},
    )
    assert create_r.status_code == 201
    uid = create_r.json()["id"]
    r = client.post(
        "/api/users/delete",
        headers=_auth_header(auth_token),
        json={"id": uid},
    )
    assert r.status_code == 200
    assert r.json().get("message") == "删除成功"


def test_users_delete_nonexistent_returns_404(client, auth_token):
    """删除不存在用户返回 404"""
    r = client.post(
        "/api/users/delete",
        headers=_auth_header(auth_token),
        json={"id": "non-existent-user-id"},
    )
    assert r.status_code == 404
    assert r.json().get("code") == 404


def test_users_delete_self_returns_400(client, auth_token):
    """管理员不能删除当前登录用户自己，返回 400"""
    # 先登录拿到当前用户 id（从 login 响应的 user.id）
    login_r = client.post("/api/auth/login", json={"username": "admin", "password": "123456"})
    assert login_r.status_code == 200
    current_user_id = login_r.json()["user"]["id"]
    r = client.post(
        "/api/users/delete",
        headers=_auth_header(auth_token),
        json={"id": current_user_id},
    )
    assert r.status_code == 400
    body = r.json()
    assert body.get("code") == 400
    assert "message" in body


# ---------- E2E：管理员 创建 → 修改 → 删除 用户 ----------


def test_e2e_admin_create_then_update_then_delete_user(client, auth_token):
    """E2E：管理员创建用户 → 修改用户 → 删除用户"""
    username = f"testuser_e2e_{uuid.uuid4().hex[:8]}"
    create_r = client.post(
        "/api/users/create",
        headers=_auth_header(auth_token),
        json={"username": username, "password": "123456", "role": "市场部", "displayName": "E2E初始"},
    )
    assert create_r.status_code == 201
    uid = create_r.json()["id"]
    assert uid

    update_r = client.post(
        "/api/users/update",
        headers=_auth_header(auth_token),
        json={"id": uid, "displayName": "E2E已修改", "role": "技经部"},
    )
    assert update_r.status_code == 200
    assert update_r.json().get("message") == "保存成功"

    delete_r = client.post(
        "/api/users/delete",
        headers=_auth_header(auth_token),
        json={"id": uid},
    )
    assert delete_r.status_code == 200
    assert delete_r.json().get("message") == "删除成功"