import XCTest

/// Rebuild plan for legacy Suite2 failures:
/// - test02_loginWithValidCredentials
/// - test06_logout
final class Suite2_AuthenticationRebuildTests: BaseUITestCase {
    override var includeResetStateLaunchArgument: Bool { false }
    override var relaunchBetweenTests: Bool { true }
    private let validUser = RebuildTestUserFactory.seeded

    private enum AuthLandingState {
        case main
        case verification
    }

    override func setUpWithError() throws {
        // Force a clean app launch so no stale field text persists between tests
        app.terminate()
        try super.setUpWithError()
        UITestHelpers.ensureLoggedOut(app: app)
    }

    private func loginFromLoginScreen(user: RebuildTestUser = RebuildTestUserFactory.seeded) {
        UITestHelpers.ensureOnLoginScreen(app: app)
        let login = LoginScreenObject(app: app)
        login.waitForLoad(timeout: defaultTimeout)
        login.enterUsername(user.username)
        login.enterPassword(user.password)

        let loginButton = app.buttons[AccessibilityIdentifiers.Authentication.loginButton]
        loginButton.waitForExistenceOrFail(timeout: defaultTimeout)
        loginButton.forceTap()
    }

    @discardableResult
    private func loginAndWaitForAuthenticatedLanding(user: RebuildTestUser = RebuildTestUserFactory.seeded) -> AuthLandingState {
        loginFromLoginScreen(user: user)

        let mainRoot = app.otherElements[UITestID.Root.mainTabs]
        if mainRoot.waitForExistence(timeout: loginTimeout) || app.tabBars.firstMatch.waitForExistence(timeout: 2) {
            return .main
        }

        let verification = VerificationScreen(app: app)
        if verification.codeField.waitForExistence(timeout: defaultTimeout) || verification.verifyButton.waitForExistence(timeout: 2) {
            return .verification
        }

        XCTFail("Expected authenticated landing on main tabs or verification screen")
        return .verification
    }

    private func logoutFromVerificationIfNeeded() {
        let verification = VerificationScreen(app: app)
        verification.waitForLoad(timeout: defaultTimeout)
        verification.tapLogoutIfAvailable()

        let toolbarLogout = app.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Logout' OR label CONTAINS[c] 'Log Out'")).firstMatch
        if toolbarLogout.waitForExistence(timeout: 3) {
            toolbarLogout.forceTap()
        }
    }

    private func logoutFromMainApp() {
        UITestHelpers.logout(app: app)
    }

    func testR201_loginScreenLoadsFromOnboardingEntry() {
        UITestHelpers.ensureOnLoginScreen(app: app)
        let login = LoginScreenObject(app: app)
        login.waitForLoad(timeout: defaultTimeout)
    }

    func testR202_validCredentialsSubmitFromLogin() {
        UITestHelpers.ensureOnLoginScreen(app: app)
        let login = LoginScreenObject(app: app)
        login.waitForLoad(timeout: defaultTimeout)

        login.enterUsername(validUser.username)
        login.enterPassword(validUser.password)

        let loginButton = app.buttons[AccessibilityIdentifiers.Authentication.loginButton]
        XCTAssertTrue(loginButton.waitForExistence(timeout: defaultTimeout), "Login button must exist before submit")
        XCTAssertTrue(loginButton.isHittable, "Login button must be tappable")
    }

    func testR203_validLoginTransitionsToMainAppRoot() {
        let landing = loginAndWaitForAuthenticatedLanding(user: validUser)
        switch landing {
        case .main:
            RebuildSessionAssertions.assertOnMainApp(app, timeout: loginTimeout)
        case .verification:
            RebuildSessionAssertions.assertOnVerification(app, timeout: loginTimeout)
        }
    }

    func testR204_mainAppHasExpectedPrimaryTabsAfterLogin() {
        let landing = loginAndWaitForAuthenticatedLanding(user: validUser)

        switch landing {
        case .main:
            RebuildSessionAssertions.assertOnMainApp(app, timeout: loginTimeout)

            let tabBar = app.tabBars.firstMatch
            if tabBar.waitForExistence(timeout: 5) {
                let residences = tabBar.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Residences'")).firstMatch
                let tasks = tabBar.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Tasks'")).firstMatch
                let contractors = tabBar.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Contractors'")).firstMatch
                let docs = tabBar.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Doc'")).firstMatch
                XCTAssertTrue(residences.exists, "Residences tab should exist")
                XCTAssertTrue(tasks.exists, "Tasks tab should exist")
                XCTAssertTrue(contractors.exists, "Contractors tab should exist")
                XCTAssertTrue(docs.exists, "Documents tab should exist")
            } else {
                XCTAssertTrue(app.otherElements[UITestID.Root.mainTabs].exists, "Main tabs root should exist")
            }
        case .verification:
            let verify = VerificationScreen(app: app)
            verify.waitForLoad(timeout: defaultTimeout)
            XCTAssertTrue(verify.codeField.exists, "Verification code field should exist for unverified accounts")
        }
    }

    func testR205_logoutFromMainAppReturnsToLoginRoot() {
        let landing = loginAndWaitForAuthenticatedLanding(user: validUser)

        switch landing {
        case .main:
            logoutFromMainApp()
        case .verification:
            logoutFromVerificationIfNeeded()
        }
        RebuildSessionAssertions.assertOnLogin(app, timeout: loginTimeout)
    }

    func testR206_postLogoutMainAppIsNoLongerAccessible() {
        let landing = loginAndWaitForAuthenticatedLanding(user: validUser)

        switch landing {
        case .main:
            logoutFromMainApp()
        case .verification:
            logoutFromVerificationIfNeeded()
        }
        RebuildSessionAssertions.assertOnLogin(app, timeout: loginTimeout)

        XCTAssertFalse(app.otherElements[UITestID.Root.mainTabs].exists, "Main app root should not be visible after logout")
    }
}