//
//  SettingsScreen.swift
//  Tests iOS
//
//  Screen object for the Settings tab (Customize + Settings sub-tabs).
//

import XCTest

struct SettingsScreen {
    let app: XCUIApplication

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

    // MARK: - Elements

    var settingsHeader: XCUIElement { app.element(UITestID.Settings.header) }
    var customizeSegment: XCUIElement { app.element(UITestID.Settings.customizeTab) }
    var settingsSegment: XCUIElement { app.element(UITestID.Settings.settingsTab) }
    var upgradeBanner: XCUIElement { app.element(UITestID.Settings.upgradeBanner) }
    var subscribeButton: XCUIElement { app.element(UITestID.Settings.subscribeButton) }
    var whyUpgradeButton: XCUIElement { app.element(UITestID.Settings.whyUpgradeButton) }
    var browseThemesButton: XCUIElement { app.element(UITestID.Settings.browseThemesButton) }
    var clearDataButton: XCUIElement { app.element(UITestID.Settings.clearDataButton) }
    var analyticsToggle: XCUIElement { app.element(UITestID.Settings.analyticsToggle) }
    var eulaButton: XCUIElement { app.element(UITestID.Settings.eulaButton) }
    var privacyPolicyButton: XCUIElement { app.element(UITestID.Settings.privacyPolicyButton) }

    // MARK: - Actions

    func tapCustomizeTab(file: StaticString = #filePath, line: UInt = #line) {
        tapSegment(identifier: UITestID.Settings.customizeTab, fallbackLabel: "Customize", file: file, line: line)
    }

    func tapSettingsTab(file: StaticString = #filePath, line: UInt = #line) {
        tapSegment(identifier: UITestID.Settings.settingsTab, fallbackLabel: "Settings", file: file, line: line)
    }

    private func tapSegment(identifier: String, fallbackLabel: String, file: StaticString, line: UInt) {
        // On iOS 26, segmented controls may expose buttons by label or by ID.
        // Try multiple strategies in order of reliability.

        // Strategy 1: Segmented control button by label (most reliable)
        let segButton = app.segmentedControls.buttons[fallbackLabel]
        if segButton.waitForExistence(timeout: defaultTimeout) && segButton.isHittable {
            segButton.tap()
            return
        }

        // Strategy 2: Find a non-tab-bar button with matching label
        let tabBarButton = app.tabBars.buttons[fallbackLabel]
        let allButtons = app.buttons.matching(NSPredicate(format: "label == %@", fallbackLabel)).allElementsBoundByIndex
        for button in allButtons {
            if button.isHittable && button.frame != tabBarButton.frame {
                button.tap()
                return
            }
        }

        // Strategy 3: Accessibility ID with coordinate tap fallback
        let byID = app.element(identifier)
        if byID.waitForExistence(timeout: defaultTimeout) {
            byID.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
            return
        }

        XCTFail("Could not find segment '\(fallbackLabel)' by ID or label", file: file, line: line)
    }

    func tapClearData(file: StaticString = #filePath, line: UInt = #line) {
        scrollToSettingsElement(clearDataButton, maxSwipes: 20, file: file, line: line)
        clearDataButton.forceTap(file: file, line: line)
    }

    func tapAnalyticsToggle(file: StaticString = #filePath, line: UInt = #line) {
        scrollToSettingsElement(analyticsToggle, maxSwipes: 15, file: file, line: line)
        analyticsToggle.forceTap(file: file, line: line)
    }

    /// Scroll within the settings content to find a deeply nested element.
    /// Uses aggressive swipes on the main app surface since the ScrollView
    /// hierarchy varies by iOS version.
    private func scrollToSettingsElement(
        _ element: XCUIElement,
        maxSwipes: Int,
        file: StaticString,
        line: UInt
    ) {
        if element.exists && element.isHittable { return }

        for _ in 0..<maxSwipes {
            // Swipe up from center to scroll the settings content
            let start = app.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.8))
            let end = app.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.2))
            start.press(forDuration: 0.05, thenDragTo: end)

            if element.exists && element.isHittable { return }
        }

        XCTFail("Could not scroll to settings element after \(maxSwipes) swipes: \(element)", file: file, line: line)
    }

    // MARK: - Assertions

    @discardableResult
    func assertVisible(file: StaticString = #filePath, line: UInt = #line) -> SettingsScreen {
        settingsHeader.waitForExistenceOrFail(timeout: navigationTimeout, message: "Settings header should be visible", file: file, line: line)
        return self
    }

    func assertUpgradeBannerVisible(file: StaticString = #filePath, line: UInt = #line) {
        upgradeBanner.waitForExistenceOrFail(timeout: defaultTimeout, message: "Upgrade banner should be visible", file: file, line: line)
    }

    func assertUpgradeBannerHidden(file: StaticString = #filePath, line: UInt = #line) {
        upgradeBanner.waitForNonExistence(timeout: navigationTimeout, message: "Upgrade banner should be hidden (subscribed)", file: file, line: line)
    }
}