import XCTest

/// Page object for the main tab view that appears after login.
///
/// The app has 4 tabs: Residences, Tasks, Contractors, Documents.
/// Profile is accessed via the settings button on the Residences screen.
///
/// Tab bar buttons are matched by label because SwiftUI's `.accessibilityIdentifier()`
/// on tab content does not propagate to the tab bar button itself.
class MainTabScreen: BaseScreen {

    // MARK: - Tab Elements

    var residencesTab: XCUIElement {
        app.tabBars.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Residences'")).firstMatch
    }

    var tasksTab: XCUIElement {
        app.tabBars.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Tasks'")).firstMatch
    }

    var contractorsTab: XCUIElement {
        app.tabBars.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Contractors'")).firstMatch
    }

    var documentsTab: XCUIElement {
        app.tabBars.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Doc'")).firstMatch
    }

    /// Settings button on the Residences tab (leads to profile/settings).
    var settingsButton: XCUIElement {
        app.buttons[AccessibilityIdentifiers.Navigation.settingsButton]
    }

    override var isDisplayed: Bool {
        residencesTab.waitForExistence(timeout: timeout)
    }

    // MARK: - Navigation

    @discardableResult
    func goToResidences() -> Self {
        waitForElement(residencesTab).tap()
        return self
    }

    @discardableResult
    func goToTasks() -> Self {
        waitForElement(tasksTab).tap()
        return self
    }

    @discardableResult
    func goToContractors() -> Self {
        waitForElement(contractorsTab).tap()
        return self
    }

    @discardableResult
    func goToDocuments() -> Self {
        waitForElement(documentsTab).tap()
        return self
    }

    /// Navigates to settings/profile via the settings button on Residences tab.
    @discardableResult
    func goToSettings() -> Self {
        goToResidences()
        waitForElement(settingsButton).tap()
        return self
    }

    // MARK: - Logout

    /// Logs out by navigating to settings and tapping the logout button.
    /// Handles the confirmation alert automatically.
    func logout() {
        goToSettings()

        // The profile sheet uses a SwiftUI List (lazy CollectionView).
        // The logout button is near the bottom and may not exist in the
        // accessibility tree until scrolled into view.
        let logoutButton = app.buttons[AccessibilityIdentifiers.Profile.logoutButton]

        if !logoutButton.waitForExistence(timeout: 3) {
            // Scroll down in the sheet to reveal the logout button
            let collectionView = app.collectionViews.firstMatch
            if collectionView.exists {
                for _ in 0..<5 {
                    collectionView.swipeUp()
                    if logoutButton.waitForExistence(timeout: 1) { break }
                }
            }
        }

        guard logoutButton.waitForExistence(timeout: 5) else {
            XCTFail("Logout button not found in settings sheet after scrolling")
            return
        }

        if logoutButton.isHittable {
            logoutButton.tap()
        } else {
            logoutButton.forceTap()
        }

        // Handle confirmation alert
        let alert = app.alerts.firstMatch
        if alert.waitForExistence(timeout: 5) {
            let confirmLogout = alert.buttons["Log Out"]
            if confirmLogout.waitForExistence(timeout: 3) {
                confirmLogout.tap()
            }
        }
    }
}