# tests/integration/api/v1/test_auth_endpoints.py
from datetime import UTC, datetime, timedelta

import pytest
from jose import jwt


@pytest.mark.integration
@pytest.mark.api
@pytest.mark.auth
class TestAuthenticationAPI:
    def test_register_user_success(self, client, db):
        """Test successful user registration"""
        response = client.post(
            "/api/v1/auth/register",
            json={
                "email": "newuser@example.com",
                "username": "newuser",
                "password": "securepass123",
            },
        )

        assert response.status_code == 200
        data = response.json()
        assert data["email"] == "newuser@example.com"
        assert data["username"] == "newuser"
        assert data["role"] == "user"
        assert data["is_active"] is True
        assert "hashed_password" not in data

    def test_register_user_duplicate_email(self, client, test_user):
        """Test registration with duplicate email"""
        response = client.post(
            "/api/v1/auth/register",
            json={
                "email": test_user.email,  # Same as test_user
                "username": "newuser",
                "password": "securepass123",
            },
        )

        assert response.status_code == 409
        data = response.json()
        assert data["error_code"] == "USER_ALREADY_EXISTS"
        assert "Email already registered" in data["message"]
        assert data["details"]["field"] == "email"

    def test_register_user_duplicate_username(self, client, test_user):
        """Test registration with duplicate username"""
        response = client.post(
            "/api/v1/auth/register",
            json={
                "email": "new@example.com",
                "username": test_user.username,  # Same as test_user
                "password": "securepass123",
            },
        )

        assert response.status_code == 409
        data = response.json()
        assert data["error_code"] == "USER_ALREADY_EXISTS"
        assert "Username already taken" in data["message"]
        assert data["details"]["field"] == "username"

    def test_register_user_validation_error(self, client):
        """Test registration with invalid data"""
        response = client.post(
            "/api/v1/auth/register",
            json={
                "email": "invalid-email",  # Invalid email format
                "username": "",  # Empty username
                "password": "123",  # Too short password
            },
        )

        assert response.status_code == 422
        data = response.json()
        assert data["error_code"] == "VALIDATION_ERROR"
        assert "Request validation failed" in data["message"]
        assert "validation_errors" in data["details"]

    def test_login_success(self, client, test_user):
        """Test successful login"""
        response = client.post(
            "/api/v1/auth/login",
            json={"username": test_user.username, "password": "testpass123"},
        )

        assert response.status_code == 200
        data = response.json()
        assert "access_token" in data
        assert data["token_type"] == "bearer"
        assert "expires_in" in data
        assert data["user"]["username"] == test_user.username
        assert data["user"]["email"] == test_user.email

    def test_login_wrong_password(self, client, test_user):
        """Test login with wrong password"""
        response = client.post(
            "/api/v1/auth/login",
            json={"username": test_user.username, "password": "wrongpassword"},
        )

        assert response.status_code == 401
        data = response.json()
        assert data["error_code"] == "INVALID_CREDENTIALS"
        assert "Incorrect username or password" in data["message"]

    def test_login_nonexistent_user(self, client, db):
        """Test login with nonexistent user"""
        response = client.post(
            "/api/v1/auth/login",
            json={"username": "nonexistent", "password": "password123"},
        )

        assert response.status_code == 401
        data = response.json()
        assert data["error_code"] == "INVALID_CREDENTIALS"
        assert "Incorrect username or password" in data["message"]

    def test_login_inactive_user(self, client, db, test_user):
        """Test login with inactive user account"""
        # Manually deactivate the user for this test
        original_status = test_user.is_active
        test_user.is_active = False
        db.commit()

        try:
            response = client.post(
                "/api/v1/auth/login",
                json={"username": test_user.username, "password": "testpass123"},
            )

            assert response.status_code == 403
            data = response.json()
            assert data["error_code"] == "USER_NOT_ACTIVE"
            assert "User account is not active" in data["message"]

        finally:
            # Restore original status for cleanup
            test_user.is_active = original_status
            db.commit()

    def test_login_validation_error(self, client):
        """Test login with invalid request format"""
        response = client.post(
            "/api/v1/auth/login",
            json={
                "username": "",  # Empty username
                # Missing password field
            },
        )

        assert response.status_code == 422
        data = response.json()
        assert data["error_code"] == "VALIDATION_ERROR"
        assert "Request validation failed" in data["message"]

    def test_get_current_user_info(self, client, auth_headers, test_user):
        """Test getting current user info"""
        response = client.get("/api/v1/auth/me", headers=auth_headers)

        assert response.status_code == 200
        data = response.json()
        assert data["username"] == test_user.username
        assert data["email"] == test_user.email
        assert data["role"] == test_user.role
        assert data["is_active"] is True

    def test_get_current_user_without_auth(self, client):
        """Test getting current user without authentication"""
        response = client.get("/api/v1/auth/me")

        assert response.status_code == 401
        data = response.json()
        assert data["error_code"] == "INVALID_TOKEN"
        assert "Authorization header required" in data["message"]

    def test_get_current_user_invalid_token(self, client):
        """Test getting current user with invalid token"""
        response = client.get(
            "/api/v1/auth/me", headers={"Authorization": "Bearer invalid_token_here"}
        )

        assert response.status_code == 401
        data = response.json()
        assert data["error_code"] == "INVALID_TOKEN"

    def test_get_current_user_expired_token(self, client, test_user, auth_manager):
        """Test getting current user with expired token"""
        # Create an expired token by mocking the expiration

        # Create token that expired 1 hour ago
        expired_payload = {
            "sub": str(test_user.id),
            "username": test_user.username,
            "email": test_user.email,
            "role": test_user.role,
            "exp": datetime.now(UTC) - timedelta(hours=1),
            "iat": datetime.now(UTC) - timedelta(hours=2),
        }

        expired_token = jwt.encode(
            expired_payload, auth_manager.secret_key, algorithm=auth_manager.algorithm
        )

        response = client.get(
            "/api/v1/auth/me", headers={"Authorization": f"Bearer {expired_token}"}
        )

        assert response.status_code == 401
        data = response.json()
        assert data["error_code"] == "TOKEN_EXPIRED"

    def test_user_registration_flow(self, client, db):
        """Test complete user registration and login flow"""
        # Register new user
        register_response = client.post(
            "/api/v1/auth/register",
            json={
                "email": "flowtest@example.com",
                "username": "flowtest",
                "password": "securepass123",
            },
        )

        assert register_response.status_code == 200
        user_data = register_response.json()
        assert user_data["email"] == "flowtest@example.com"
        assert user_data["username"] == "flowtest"

        # Login with new user
        login_response = client.post(
            "/api/v1/auth/login",
            json={"username": "flowtest", "password": "securepass123"},
        )

        assert login_response.status_code == 200
        login_data = login_response.json()
        assert "access_token" in login_data
        assert login_data["user"]["username"] == "flowtest"

        # Use token to get user info
        headers = {"Authorization": f"Bearer {login_data['access_token']}"}
        me_response = client.get("/api/v1/auth/me", headers=headers)

        assert me_response.status_code == 200
        me_data = me_response.json()
        assert me_data["username"] == "flowtest"
        assert me_data["email"] == "flowtest@example.com"


@pytest.mark.unit
@pytest.mark.auth
class TestAuthManager:
    def test_hash_password(self, auth_manager):
        """Test password hashing"""
        password = "testpassword123"
        hashed = auth_manager.hash_password(password)

        assert hashed != password
        assert len(hashed) > 20  # bcrypt hashes are long
        assert hashed.startswith("$")  # bcrypt hash format

    def test_verify_password(self, auth_manager):
        """Test password verification"""
        password = "testpassword123"
        hashed = auth_manager.hash_password(password)

        assert auth_manager.verify_password(password, hashed) is True
        assert auth_manager.verify_password("wrongpassword", hashed) is False

    def test_create_access_token(self, auth_manager, test_user):
        """Test JWT token creation"""
        token_data = auth_manager.create_access_token(test_user)

        assert "access_token" in token_data
        assert token_data["token_type"] == "bearer"
        assert "expires_in" in token_data
        assert isinstance(token_data["expires_in"], int)
        assert token_data["expires_in"] > 0

    def test_verify_token_valid(self, auth_manager, test_user):
        """Test JWT token verification with valid token"""
        token_data = auth_manager.create_access_token(test_user)
        token = token_data["access_token"]

        verified_data = auth_manager.verify_token(token)

        assert verified_data["user_id"] == test_user.id
        assert verified_data["username"] == test_user.username
        assert verified_data["email"] == test_user.email
        assert verified_data["role"] == test_user.role

    def test_verify_token_invalid(self, auth_manager):
        """Test JWT token verification with invalid token"""
        from app.exceptions.auth import InvalidTokenException

        with pytest.raises(InvalidTokenException):
            auth_manager.verify_token("invalid_token_here")

    def test_authenticate_user_success(self, auth_manager, db, test_user):
        """Test user authentication with valid credentials"""
        user = auth_manager.authenticate_user(db, test_user.username, "testpass123")

        assert user is not None
        assert user.id == test_user.id
        assert user.username == test_user.username

    def test_authenticate_user_wrong_password(self, auth_manager, db, test_user):
        """Test user authentication with wrong password"""
        user = auth_manager.authenticate_user(db, test_user.username, "wrongpassword")

        assert user is None

    def test_authenticate_user_nonexistent(self, auth_manager, db):
        """Test user authentication with nonexistent user"""
        user = auth_manager.authenticate_user(db, "nonexistent", "password")

        assert user is None