"""Phase 3 认证测试：注册、登录、登出、鉴权、IDOR 防护。"""

from fastapi.testclient import TestClient

from app.main import app


def _client() -> TestClient:
    return TestClient(app, raise_server_exceptions=False)


# --- 注册 ---

def test_register_success() -> None:
    with _client() as client:
        resp = client.post("/api/auth/register", json={
            "username": "alice",
            "email": "alice@example.com",
            "password": "password123",
        })
    assert resp.status_code == 201
    body = resp.json()
    assert body["username"] == "alice"
    assert body["email"] == "alice@example.com"
    assert body["storage_quota"] == 104_857_600
    # Cookie 已签发
    assert "session_id" in resp.cookies


def test_register_duplicate_username() -> None:
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "bob",
            "email": "bob@example.com",
            "password": "password123",
        })
        resp = client.post("/api/auth/register", json={
            "username": "bob",
            "email": "bob2@example.com",
            "password": "password123",
        })
    assert resp.status_code == 409
    assert resp.json()["code"] == "USERNAME_TAKEN"


def test_register_duplicate_email() -> None:
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "carol",
            "email": "carol@example.com",
            "password": "password123",
        })
        resp = client.post("/api/auth/register", json={
            "username": "carol2",
            "email": "carol@example.com",
            "password": "password123",
        })
    assert resp.status_code == 409
    assert resp.json()["code"] == "EMAIL_TAKEN"


def test_register_short_password() -> None:
    with _client() as client:
        resp = client.post("/api/auth/register", json={
            "username": "dave",
            "email": "dave@example.com",
            "password": "short",
        })
    assert resp.status_code == 422


# --- 登录 ---

def test_login_by_username() -> None:
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "eve",
            "email": "eve@example.com",
            "password": "password123",
        })
        resp = client.post("/api/auth/login", json={
            "username_or_email": "eve",
            "password": "password123",
        })
    assert resp.status_code == 200
    assert resp.json()["username"] == "eve"
    assert "session_id" in resp.cookies


def test_login_by_email() -> None:
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "frank",
            "email": "frank@example.com",
            "password": "password123",
        })
        resp = client.post("/api/auth/login", json={
            "username_or_email": "frank@example.com",
            "password": "password123",
        })
    assert resp.status_code == 200
    assert resp.json()["username"] == "frank"


def test_login_wrong_password() -> None:
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "grace",
            "email": "grace@example.com",
            "password": "password123",
        })
        resp = client.post("/api/auth/login", json={
            "username_or_email": "grace",
            "password": "wrongpassword",
        })
    assert resp.status_code == 401
    assert resp.json()["code"] == "AUTH_INVALID_CREDENTIALS"


def test_login_nonexistent_user() -> None:
    with _client() as client:
        resp = client.post("/api/auth/login", json={
            "username_or_email": "nobody",
            "password": "password123",
        })
    assert resp.status_code == 401


# --- 登出 ---

def test_logout() -> None:
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "heidi",
            "email": "heidi@example.com",
            "password": "password123",
        })
        resp = client.post("/api/auth/logout")
    assert resp.status_code == 204


# --- /api/me ---

def test_me_authenticated() -> None:
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "ivan",
            "email": "ivan@example.com",
            "password": "password123",
        })
        resp = client.get("/api/auth/me")
    assert resp.status_code == 200
    body = resp.json()
    assert body["username"] == "ivan"
    assert body["storage_used"] == 0


def test_me_unauthenticated() -> None:
    with _client() as client:
        resp = client.get("/api/auth/me")
    assert resp.status_code == 401
    assert resp.json()["code"] == "AUTH_REQUIRED"


# --- IDOR 防护 ---

def test_user_a_cannot_see_user_b() -> None:
    """用户A 登录后，session 只能访问自己的 /me。"""
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "user_a",
            "email": "a@example.com",
            "password": "password123",
        })
        # user_a 已登录（Cookie 自动携带）
        me_resp = client.get("/api/auth/me")
    assert me_resp.status_code == 200
    assert me_resp.json()["username"] == "user_a"


def test_storage_endpoint() -> None:
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "storage_user",
            "email": "storage@example.com",
            "password": "password123",
        })
        resp = client.get("/api/auth/storage")
    assert resp.status_code == 200
    body = resp.json()
    assert body["storage_used"] == 0
    assert body["storage_quota"] == 104_857_600
    assert body["storage_quota_mb"] == 100.0


# --- free plan seed ---

def test_free_plan_auto_created() -> None:
    """free plan 应在应用启动时自动创建。"""
    with _client() as client:
        client.post("/api/auth/register", json={
            "username": "plan_user",
            "email": "plan@example.com",
            "password": "password123",
        })
        resp = client.get("/api/auth/me")
    assert resp.status_code == 200
    assert resp.json()["storage_quota"] == 104_857_600