//
//  OnboardingScreen.swift
//  Tests iOS
//
//  Screen object for the onboarding flow — welcome, time, day, style, and subscription screens.
//

import XCTest

struct OnboardingScreen {
    let app: XCUIApplication

    private let defaultTimeout: TimeInterval = 2
    private let navigationTimeout: TimeInterval = 5

    // MARK: - Elements

    var welcomeScreen: XCUIElement { app.element(UITestID.Onboarding.welcome) }
    var subscriptionScreen: XCUIElement { app.element(UITestID.Onboarding.subscription) }
    var dayTodayButton: XCUIElement { app.element(UITestID.Onboarding.dayToday) }
    var dayYesterdayButton: XCUIElement { app.element(UITestID.Onboarding.dayYesterday) }
    var skipButton: XCUIElement { app.element(UITestID.Onboarding.skip) }

    // MARK: - Actions

    /// Swipe to next onboarding page. Uses a coordinate-based drag at the top
    /// of the screen to avoid DatePicker/ScrollView gesture conflicts on inner pages.
    /// This is the only reliable way to advance a paged TabView in XCUITest.
    func swipeToNext() {
        // Use slow velocity for reliable paged TabView advancement on iOS 26.
        app.swipeLeft(velocity: .slow)
        // Allow transition animation to settle
        _ = app.waitForExistence(timeout: 0.8)
    }

    /// Complete the full onboarding flow: swipe through all screens and skip subscription.
    func completeOnboarding(file: StaticString = #filePath, line: UInt = #line) {
        // Welcome -> swipe
        welcomeScreen.waitForExistenceOrFail(
            timeout: navigationTimeout,
            message: "Onboarding welcome screen should appear",
            file: file, line: line
        )
        swipeToNext()

        // Time -> swipe. The wheel DatePicker can absorb gestures, so retry if needed.
        swipeToNext()
        if !dayTodayButton.waitForExistence(timeout: 2) {
            // Retry — the DatePicker may have absorbed the first swipe
            swipeToNext()
        }

        // Day -> select Today, then swipe
        dayTodayButton.waitForExistenceOrFail(
            timeout: navigationTimeout,
            message: "Day 'Today' button should appear",
            file: file, line: line
        )
        dayTodayButton.forceTap(file: file, line: line)
        swipeToNext()

        // Style -> swipe
        swipeToNext()

        // Subscription -> tap skip
        skipButton.waitForExistenceOrFail(
            timeout: navigationTimeout,
            message: "Skip button should appear on subscription screen",
            file: file, line: line
        )
        skipButton.forceTap(file: file, line: line)
    }

    // MARK: - Assertions

    @discardableResult
    func assertVisible(file: StaticString = #filePath, line: UInt = #line) -> OnboardingScreen {
        welcomeScreen.waitForExistenceOrFail(
            timeout: navigationTimeout,
            message: "Onboarding welcome screen should be visible",
            file: file, line: line
        )
        return self
    }

    func assertDismissed(file: StaticString = #filePath, line: UInt = #line) {
        app.tabBars.firstMatch.waitForExistenceOrFail(
            timeout: navigationTimeout,
            message: "Tab bar should be visible after onboarding completes",
            file: file, line: line
        )
    }
}