import XCTest

final class AuthenticationTests: BaseUITestCase {
    func testF201_OnboardingLoginEntryShowsLoginScreen() {
        let login = TestFlows.navigateToLoginFromOnboarding(app: app)
        login.waitForLoad(timeout: defaultTimeout)
    }

    func testF202_LoginScreenCanTogglePasswordVisibility() {
        let login = TestFlows.navigateToLoginFromOnboarding(app: app)
        login.enterUsername("u")
        login.enterPassword("p")
        login.tapPasswordVisibilityToggle()
        login.assertPasswordFieldVisible()
    }

    func testF203_RegisterSheetCanOpenAndDismiss() {
        let register = TestFlows.openRegisterFromLogin(app: app)
        register.tapCancel()

        let login = LoginScreenObject(app: app)
        login.waitForLoad(timeout: defaultTimeout)
    }

    func testF204_RegisterFormAcceptsInput() {
        let register = TestFlows.openRegisterFromLogin(app: app)
        register.waitForLoad(timeout: defaultTimeout)

        XCTAssertTrue(app.buttons[UITestID.Auth.registerButton].exists)
    }

    func testF205_LoginButtonDisabledWhenCredentialsAreEmpty() {
        let login = TestFlows.navigateToLoginFromOnboarding(app: app)
        login.waitForLoad(timeout: defaultTimeout)

        let loginButton = app.buttons[UITestID.Auth.loginButton]
        loginButton.waitForExistenceOrFail(timeout: defaultTimeout)
        XCTAssertFalse(loginButton.isEnabled, "Login button should be disabled when username/password are empty")
    }

    // MARK: - Additional Authentication Coverage

    func testF206_ForgotPasswordButtonIsAccessible() {
        let login = TestFlows.navigateToLoginFromOnboarding(app: app)
        login.waitForLoad(timeout: defaultTimeout)

        let forgotButton = app.buttons[UITestID.Auth.forgotPasswordButton]
        forgotButton.waitForExistenceOrFail(timeout: defaultTimeout)
        XCTAssertTrue(forgotButton.isHittable, "Forgot password button should be accessible")
    }

    func testF207_LoginScreenShowsAllExpectedElements() {
        let login = TestFlows.navigateToLoginFromOnboarding(app: app)
        login.waitForLoad(timeout: defaultTimeout)

        XCTAssertTrue(app.textFields[UITestID.Auth.usernameField].exists, "Username field should exist")
        XCTAssertTrue(
            app.secureTextFields[UITestID.Auth.passwordField].exists || app.textFields[UITestID.Auth.passwordField].exists,
            "Password field should exist"
        )
        XCTAssertTrue(app.buttons[UITestID.Auth.loginButton].exists, "Login button should exist")
        XCTAssertTrue(app.buttons[UITestID.Auth.signUpButton].exists, "Sign up button should exist")
        XCTAssertTrue(app.buttons[UITestID.Auth.forgotPasswordButton].exists, "Forgot password button should exist")
        XCTAssertTrue(app.buttons[UITestID.Auth.passwordVisibilityToggle].exists, "Password visibility toggle should exist")
    }

    func testF208_RegisterFormShowsAllRequiredFields() {
        let register = TestFlows.openRegisterFromLogin(app: app)
        register.waitForLoad(timeout: defaultTimeout)

        XCTAssertTrue(app.textFields[UITestID.Auth.registerUsernameField].exists, "Register username field should exist")
        XCTAssertTrue(app.textFields[UITestID.Auth.registerEmailField].exists, "Register email field should exist")
        XCTAssertTrue(app.secureTextFields[UITestID.Auth.registerPasswordField].exists, "Register password field should exist")
        XCTAssertTrue(app.secureTextFields[UITestID.Auth.registerConfirmPasswordField].exists, "Register confirm password field should exist")
        XCTAssertTrue(app.buttons[UITestID.Auth.registerButton].exists, "Register button should exist")
        XCTAssertTrue(app.buttons[UITestID.Auth.registerCancelButton].exists, "Register cancel button should exist")
    }

    func testF209_ForgotPasswordNavigatesToResetFlow() {
        let login = TestFlows.navigateToLoginFromOnboarding(app: app)
        login.waitForLoad(timeout: defaultTimeout)
        login.tapForgotPassword()

        // Verify that tapping forgot password transitions away from login
        // The forgot password screen should appear (either sheet or navigation)
        let forgotPasswordAppeared = app.staticTexts.containing(
            NSPredicate(format: "label CONTAINS[c] 'Forgot' OR label CONTAINS[c] 'Reset' OR label CONTAINS[c] 'Password'")
        ).firstMatch.waitForExistence(timeout: defaultTimeout)

        XCTAssertTrue(forgotPasswordAppeared, "Forgot password flow should appear after tapping button")
    }

    // MARK: - AUTH-005: Invalid token at startup clears session and returns to login

    func test08_invalidatedTokenRedirectsToLogin() throws {
        try XCTSkipIf(!TestAccountAPIClient.isBackendReachable(), "Backend not reachable")

        // Create a verified account via API
        guard let session = TestAccountManager.createVerifiedAccount() else {
            XCTFail("Could not create verified test account")
            return
        }

        // Login via UI
        let login = TestFlows.navigateToLoginFromOnboarding(app: app)
        login.waitForLoad(timeout: defaultTimeout)
        TestFlows.loginWithCredentials(app: app, username: session.username, password: session.password)

        // Wait until the main tab bar is visible, confirming successful login
        let mainTabs = app.otherElements[UITestID.Root.mainTabs]
        XCTAssertTrue(
            mainTabs.waitForExistence(timeout: longTimeout),
            "Expected main tabs after login"
        )

        // Invalidate the token via the logout API (simulates a server-side token revocation)
        TestAccountManager.invalidateToken(session)

        // Force restart the app — terminate and relaunch without --reset-state so the
        // app restores its persisted session, which should then be rejected by the server.
        app.terminate()
        app.launchArguments = ["--ui-testing", "--disable-animations"]
        app.launch()
        app.otherElements[UITestID.Root.ready].waitForExistenceOrFail(timeout: defaultTimeout)

        // The app should detect the invalid token and redirect to the login screen
        let usernameField = app.textFields[UITestID.Auth.usernameField]
        XCTAssertTrue(
            usernameField.waitForExistence(timeout: longTimeout),
            "Expected login screen after startup with an invalidated token"
        )
    }
}