//
//  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 dayTodayButton: XCUIElement { app.element(UITestID.Onboarding.dayToday) }
    var dayYesterdayButton: XCUIElement { app.element(UITestID.Onboarding.dayYesterday) }
    var skipButton: XCUIElement { app.element(UITestID.Onboarding.skip) }
    var nextButton: XCUIElement { app.element(UITestID.Onboarding.next) }

    // MARK: - Actions

    /// Tap the "Continue" / "Get Started" next button to advance one page.
    func tapNext(file: StaticString = #filePath, line: UInt = #line) {
        nextButton.waitForExistenceOrFail(
            timeout: navigationTimeout,
            message: "Onboarding next button should exist",
            file: file, line: line
        )
        // Tap via coordinate — the page indicator may overlap the button's hittable area
        nextButton.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
        // Allow page transition to settle
        _ = app.waitForExistence(timeout: 0.5)
    }

    /// Complete the full onboarding flow by tapping through all screens.
    func completeOnboarding(file: StaticString = #filePath, line: UInt = #line) {
        // Welcome -> tap next
        welcomeScreen.waitForExistenceOrFail(
            timeout: navigationTimeout,
            message: "Onboarding welcome screen should appear",
            file: file, line: line
        )
        tapNext(file: file, line: line)

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

        // Time -> tap next
        tapNext(file: file, line: line)

        // Style -> tap next
        tapNext(file: file, line: line)

        // Subscription -> tap skip ("Maybe Later")
        // The subscription page may not expose children via accessibility IDs on iOS 26.
        // Try multiple strategies.
        let strategies: [() -> Bool] = [
            { self.skipButton.waitForExistence(timeout: 2) },
            { self.app.buttons["Maybe Later"].waitForExistence(timeout: 2) },
            { self.app.staticTexts["Maybe Later"].waitForExistence(timeout: 2) },
        ]

        for strategy in strategies {
            if strategy() {
                break
            }
        }

        if skipButton.exists {
            skipButton.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
        } else if app.buttons["Maybe Later"].exists {
            app.buttons["Maybe Later"].tap()
        } else if app.staticTexts["Maybe Later"].exists {
            app.staticTexts["Maybe Later"].tap()
        } else {
            // Last resort: tap at the expected button location (below center)
            app.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.88)).tap()
        }
    }

    // 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
        )
    }
}