import XCTest

/// Critical path tests for authentication flows.
///
/// Validates login, logout, registration entry, and password reset entry.
/// Zero sleep() calls — all waits are condition-based.
final class AuthCriticalPathTests: XCTestCase {
    var app: XCUIApplication!

    override func setUp() {
        super.setUp()
        continueAfterFailure = false
        app = TestLaunchConfig.launchApp()
    }

    override func tearDown() {
        app = nil
        super.tearDown()
    }

    // MARK: - Login

    func testLoginWithValidCredentials() {
        let login = LoginScreen(app: app)
        guard login.emailField.waitForExistence(timeout: 15) else {
            // Already logged in — verify main screen
            let main = MainTabScreen(app: app)
            XCTAssertTrue(main.isDisplayed, "Main screen should be visible when already logged in")
            return
        }

        let user = TestFixtures.TestUser.existing
        login.login(email: user.email, password: user.password)

        let main = MainTabScreen(app: app)
        XCTAssertTrue(
            main.residencesTab.waitForExistence(timeout: 15),
            "Should navigate to main screen after successful login"
        )
    }

    func testLoginWithInvalidCredentials() {
        let login = LoginScreen(app: app)
        guard login.emailField.waitForExistence(timeout: 15) else {
            return // Already logged in, skip
        }

        login.login(email: "invaliduser", password: "wrongpassword")

        // Should stay on login screen — email field should still exist
        XCTAssertTrue(
            login.emailField.waitForExistence(timeout: 10),
            "Should remain on login screen after invalid credentials"
        )

        // Tab bar should NOT appear
        let tabBar = app.tabBars.firstMatch
        XCTAssertFalse(tabBar.exists, "Tab bar should not appear after failed login")
    }

    // MARK: - Logout

    func testLogoutFlow() {
        let login = LoginScreen(app: app)
        if login.emailField.waitForExistence(timeout: 15) {
            let user = TestFixtures.TestUser.existing
            login.login(email: user.email, password: user.password)
        }

        let main = MainTabScreen(app: app)
        guard main.residencesTab.waitForExistence(timeout: 15) else {
            XCTFail("Main screen did not appear")
            return
        }

        main.logout()

        // Should be back on login screen
        let loginAfterLogout = LoginScreen(app: app)
        XCTAssertTrue(
            loginAfterLogout.emailField.waitForExistence(timeout: 15),
            "Should return to login screen after logout"
        )
    }

    // MARK: - Registration Entry

    func testSignUpButtonNavigatesToRegistration() {
        let login = LoginScreen(app: app)
        guard login.emailField.waitForExistence(timeout: 15) else {
            return // Already logged in, skip
        }

        let register = login.tapSignUp()
        XCTAssertTrue(register.isDisplayed, "Registration screen should appear after tapping Sign Up")
    }

    // MARK: - Forgot Password Entry

    func testForgotPasswordButtonExists() {
        let login = LoginScreen(app: app)
        guard login.emailField.waitForExistence(timeout: 15) else {
            return // Already logged in, skip
        }

        XCTAssertTrue(
            login.forgotPasswordButton.waitForExistence(timeout: 5),
            "Forgot password button should exist on login screen"
        )
    }
}