//
//  CustomizeScreen.swift
//  Tests iOS
//
//  Screen object for the Customize sub-tab — theme, voting layout, and day view style pickers.
//

import XCTest

struct CustomizeScreen {
    let app: XCUIApplication

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

    // MARK: - Elements

    func themeButton(named name: String) -> XCUIElement {
        app.buttons[UITestID.Customize.themeButton(name)]
    }

    func votingLayoutButton(named name: String) -> XCUIElement {
        app.buttons[UITestID.Customize.votingLayoutButton(name)]
    }

    func dayViewStyleButton(named name: String) -> XCUIElement {
        app.buttons[UITestID.Customize.dayStyleButton(name)]
    }

    func iconPackButton(named name: String) -> XCUIElement {
        app.buttons[UITestID.Customize.iconPackButton(name)]
    }

    func personalityPackButton(named name: String) -> XCUIElement {
        app.element(UITestID.Customize.personalityPackButton(name))
    }

    func appThemeCard(named name: String) -> XCUIElement {
        app.element(UITestID.Customize.appThemeCard(name))
    }

    // MARK: - Actions

    /// Select a button in a horizontal picker. Scrolls vertically to reveal
    /// the section, then scrolls horizontally to find the button.
    private func selectHorizontalPickerButton(
        _ button: XCUIElement,
        file: StaticString = #filePath,
        line: UInt = #line
    ) {
        // Already visible and hittable
        if button.waitForExistence(timeout: 1) && button.isHittable {
            button.forceTap(file: file, line: line)
            return
        }

        // Phase 1: Scroll settings page vertically to reveal the section
        for _ in 0..<5 {
            if button.exists && button.isHittable {
                button.forceTap(file: file, line: line)
                return
            }
            app.swipeUp()
        }

        // Phase 2: Button exists in tree but is off-screen in a horizontal ScrollView.
        // Simple left swipes on the app to scroll horizontally.
        if button.exists {
            for _ in 0..<8 {
                if button.isHittable {
                    button.forceTap(file: file, line: line)
                    return
                }
                app.swipeLeft()
            }
        }

        // Phase 3: Try scrolling right (button may be before current position)
        for _ in 0..<4 {
            if button.exists && button.isHittable {
                button.forceTap(file: file, line: line)
                return
            }
            app.swipeRight()
        }

        XCTFail("Could not find or tap button: \(button)", file: file, line: line)
    }

    func selectTheme(_ name: String, file: StaticString = #filePath, line: UInt = #line) {
        selectHorizontalPickerButton(themeButton(named: name), file: file, line: line)
    }

    func selectVotingLayout(_ name: String, file: StaticString = #filePath, line: UInt = #line) {
        selectHorizontalPickerButton(votingLayoutButton(named: name), file: file, line: line)
    }

    func selectDayViewStyle(_ name: String, file: StaticString = #filePath, line: UInt = #line) {
        selectHorizontalPickerButton(dayViewStyleButton(named: name), file: file, line: line)
    }

    func selectIconPack(_ name: String, file: StaticString = #filePath, line: UInt = #line) {
        let button = iconPackButton(named: name)
        button.scrollIntoView(in: app.scrollViews.firstMatch, direction: .up, maxSwipes: 5, file: file, line: line)
        button.forceTap(file: file, line: line)
    }

    func selectPersonalityPack(_ name: String, file: StaticString = #filePath, line: UInt = #line) {
        let button = personalityPackButton(named: name)
        button.scrollIntoView(in: app.scrollViews.firstMatch, direction: .up, maxSwipes: 5, file: file, line: line)
        button.forceTap(file: file, line: line)
    }

    @discardableResult
    func openThemePicker(file: StaticString = #filePath, line: UInt = #line) -> CustomizeScreen {
        let browseButton = app.element(UITestID.Settings.browseThemesButton)
        browseButton
            .waitUntilHittableOrFail(timeout: defaultTimeout, message: "Browse Themes button should be hittable", file: file, line: line)
            .forceTap(file: file, line: line)
        appThemeCard(named: "Zen Garden")
            .waitForExistenceOrFail(timeout: navigationTimeout, message: "Theme picker should show cards", file: file, line: line)
        return self
    }

    // MARK: - Assertions

    func assertThemeButtonExists(_ name: String, file: StaticString = #filePath, line: UInt = #line) {
        themeButton(named: name)
            .waitForExistenceOrFail(timeout: defaultTimeout, message: "Theme button '\(name)' should exist", file: file, line: line)
    }
}