import XCTest

/// Mock scenarios matching the main app's UITestScenario values.
/// These are passed via launch environment to configure app behavior.
enum UITestScenario: String, CaseIterable {
    case emptyDashboard
    case populatedDashboard
    case authenticated
    case unauthenticated
    case darkWatchPopulated
    case voicePrintPopulated
    case spamShieldPopulated
    case homeTitlePopulated
    case removeBrokersPopulated
    case settingsPopulated
    case authError
    case signupSuccess
    case forgotPasswordSuccess
}

/// Base class for all Kordant UI tests.
/// Provides common setup, teardown, and helper methods.
class UITestBase: XCTestCase {
    var app: XCUIApplication!

    /// The mock scenario to use for this test class.
    /// Subclasses can override to change the scenario.
    class var scenario: UITestScenario { .populatedDashboard }

    override func setUpWithError() throws {
        continueAfterFailure = false

        app = XCUIApplication()

        // Configure testing mode via launch arguments and environment
        app.launchArguments = ["-UITesting"]
        app.launchEnvironment["UITestScenario"] = Self.scenario.rawValue

        // Disable animations for faster, more reliable tests
        app.launchEnvironment["UITestDisableAnimations"] = "YES"

        // Reset any persisted state for clean test runs
        app.launch()

        // Wait for the app to settle after launch
        let _ = app.wait(for: .runningForeground, timeout: 5)
    }

    override func tearDownWithError() throws {
        // Capture screenshot on failure
        if testRun?.hasSucceeded == false {
            let screenshot = app.windows.firstMatch.screenshot()
            let attachment = XCTAttachment(screenshot: screenshot)
            attachment.name = "Failure - \(name)"
            attachment.lifetime = .keepAlways
            add(attachment)
        }

        app = nil
        super.tearDownWithError()
    }

    // MARK: - Navigation Helpers

    /// Navigate to a specific tab in the main tab bar
    func navigateToTab(_ tab: TabBarItem) {
        app.tabBars.buttons[tab.rawValue].tap()
    }

    enum TabBarItem: String {
        case dashboard = "Dashboard"
        case services = "Services"
        case alerts = "Alerts"
        case settings = "Settings"
        case account = "Account"
    }

    // MARK: - Element Queries

    /// Find a button by its accessibility label or title
    func button(_ label: String) -> XCUIElement {
        app.buttons[label]
    }

    /// Find a text field by its placeholder or label
    func textField(_ label: String) -> XCUIElement {
        let field = app.textFields[label]
        if field.exists { return field }
        return app.textFields.containing(.staticText, identifier: label).element
    }

    /// Find a secure text field by its placeholder or label
    func secureTextField(_ label: String) -> XCUIElement {
        let field = app.secureTextFields[label]
        if field.exists { return field }
        return app.secureTextFields.containing(.staticText, identifier: label).element
    }

    /// Find static text by label
    func text(_ label: String) -> XCUIElement {
        app.staticTexts[label]
    }

    /// Find a navigation bar by its title
    func navigationBar(_ title: String) -> XCUIElement {
        app.navigationBars[title]
    }

    /// Find a toggle/switch by its label
    func `switch`(_ label: String) -> XCUIElement {
        app.switches[label]
    }

    // MARK: - Waiting Helpers

    /// Wait for an element to appear with a timeout
    @discardableResult
    func waitForElement(_ element: XCUIElement, timeout: TimeInterval = 5) -> Bool {
        let predicate = NSPredicate(format: "exists == true")
        let expectation = XCTNSPredicateExpectation(predicate: predicate, object: element)
        let result = XCTWaiter.wait(for: [expectation], timeout: timeout)
        return result == .completed
    }

    /// Wait for an element to be hittable (visible and interactable)
    @discardableResult
    func waitForHittable(_ element: XCUIElement, timeout: TimeInterval = 5) -> Bool {
        let predicate = NSPredicate(format: "hittable == true")
        let expectation = XCTNSPredicateExpectation(predicate: predicate, object: element)
        let result = XCTWaiter.wait(for: [expectation], timeout: timeout)
        return result == .completed
    }

    /// Wait for an element to disappear
    @discardableResult
    func waitForAbsence(_ element: XCUIElement, timeout: TimeInterval = 5) -> Bool {
        let predicate = NSPredicate(format: "exists == false")
        let expectation = XCTNSPredicateExpectation(predicate: predicate, object: element)
        let result = XCTWaiter.wait(for: [expectation], timeout: timeout)
        return result == .completed
    }

    // MARK: - Gesture Helpers

    /// Pull to refresh on a scroll view
    func pullToRefresh() {
        let window = app.windows.firstMatch
        let start = window.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.1))
        let end = window.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.6))
        start.press(forDuration: 0, thenDragTo: end)
    }

    /// Scroll down in a scroll view
    func scrollDown(times: Int = 1) {
        for _ in 0..<times {
            app.swipeUp()
        }
    }

    /// Scroll up in a scroll view
    func scrollUp(times: Int = 1) {
        for _ in 0..<times {
            app.swipeDown()
        }
    }

    // MARK: - Auth Helpers

    /// Type credentials into the login form
    func typeLoginCredentials(email: String = "test@kordant.com", password: String = "TestPassword123") {
        let emailField = app.textFields["Email"]
        guard emailField.waitForExistence(timeout: 3) else { return }

        emailField.tap()
        emailField.typeText(email)

        let passwordField = app.secureTextFields["Password"]
        passwordField.tap()
        passwordField.typeText(password)
    }

    /// Type credentials into the signup form
    func typeSignupCredentials(name: String = "Test User", email: String = "test@kordant.com", password: String = "TestPassword123") {
        let nameField = app.textFields.firstMatch
        guard nameField.waitForExistence(timeout: 3) else { return }

        nameField.tap()
        nameField.typeText(name)

        let emailField = app.textFields.element(boundBy: 1)
        emailField.tap()
        emailField.typeText(email)

        let passwordField = app.secureTextFields.firstMatch
        passwordField.tap()
        passwordField.typeText(password)

        // Confirm password field
        let confirmField = app.secureTextFields.element(boundBy: 1)
        if confirmField.exists {
            confirmField.tap()
            confirmField.typeText(password)
        }
    }

    /// Dismiss the keyboard if present
    func dismissKeyboard() {
        if app.keyboards.element(boundBy: 0).exists {
            app.toolbars.buttons["Done"].tap()
            // Fallback: tap a non-interactive area
            if app.keyboards.element(boundBy: 0).exists {
                app.staticTexts.firstMatch.tap()
            }
        }
    }

    /// Take a screenshot and attach it to the test report
    func captureScreen(name: String = #function) {
        let screenshot = app.windows.firstMatch.screenshot()
        let attachment = XCTAttachment(screenshot: screenshot)
        attachment.name = name
        attachment.lifetime = .keepAlways
        add(attachment)
    }
}