//
//  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 segmentedPicker: XCUIElement { app.element(UITestID.Settings.segmentedPicker) }
    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(label: "Customize", file: file, line: line)
    }

    func tapSettingsTab(file: StaticString = #filePath, line: UInt = #line) {
        tapSegment(label: "Settings", file: file, line: line)
    }

    /// Tap a segmented control button by label, scoped to the settings picker
    /// to avoid collision with the tab bar's "Settings" button.
    private func tapSegment(label: String, file: StaticString, line: UInt) {
        // Find the segmented picker by its accessibility ID, then find the button within it
        let picker = segmentedPicker
        if picker.waitForExistence(timeout: defaultTimeout) {
            let button = picker.buttons[label]
            if button.waitForExistence(timeout: defaultTimeout) && button.isHittable {
                button.tap()
                return
            }
        }

        // Fallback: segmented control element type
        let segButton = app.segmentedControls.buttons[label]
        if segButton.waitForExistence(timeout: defaultTimeout) && segButton.isHittable {
            segButton.tap()
            return
        }

        XCTFail("Could not find segment '\(label)' in settings picker", 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.
    /// Swipes in the center band of the screen (between header and tab bar).
    private func scrollToSettingsElement(
        _ element: XCUIElement,
        maxSwipes: Int,
        file: StaticString,
        line: UInt
    ) {
        if element.exists && element.isHittable { return }

        for _ in 0..<maxSwipes {
            // Swipe from center-low to center-high, avoiding header area and tab bar
            let start = app.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.7))
            let end = app.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.15))
            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)
    }
}