//
//  Screens.swift
//  SportsTimeUITests
//
//  Page Object / Screen Object layer.
//  Each struct wraps an XCUIApplication and exposes user-intent methods.
//  Tests read like: homeScreen.tapStartPlanning()
//

import XCTest

// MARK: - Home Screen

struct HomeScreen {
    let app: XCUIApplication

    // MARK: Elements

    var startPlanningButton: XCUIElement {
        app.buttons["home.startPlanningButton"]
    }

    var homeTab: XCUIElement {
        app.tabBars.buttons["Home"]
    }

    var scheduleTab: XCUIElement {
        app.tabBars.buttons["Schedule"]
    }

    var myTripsTab: XCUIElement {
        app.tabBars.buttons["My Trips"]
    }

    var progressTab: XCUIElement {
        app.tabBars.buttons["Progress"]
    }

    var settingsTab: XCUIElement {
        app.tabBars.buttons["Settings"]
    }

    var adventureAwaitsText: XCUIElement {
        app.staticTexts["Adventure Awaits"]
    }

    var createTripToolbarButton: XCUIElement {
        app.buttons["home.createNewTripButton"]
    }

    var featuredTripsSection: XCUIElement {
        app.descendants(matching: .any)["home.featuredTripsSection"]
    }

    var recentTripsSection: XCUIElement {
        app.descendants(matching: .any)["home.recentTripsSection"]
    }

    var tipsSection: XCUIElement {
        app.descendants(matching: .any)["home.tipsSection"]
    }

    // MARK: Actions

    /// Waits for the home screen to fully load after bootstrap.
    @discardableResult
    func waitForLoad() -> HomeScreen {
        startPlanningButton.waitForExistenceOrFail(
            timeout: BaseUITestCase.longTimeout,
            "Home screen should load after bootstrap"
        )
        return self
    }

    /// Taps "Start Planning" to open the Trip Wizard sheet.
    func tapStartPlanning() {
        startPlanningButton.waitUntilHittable().tap()
    }

    /// Switches to a tab by tapping its tab bar button.
    func switchToTab(_ tab: XCUIElement) {
        tab.waitUntilHittable(timeout: BaseUITestCase.shortTimeout).tap()
    }

    // MARK: Assertions

    /// Asserts the tab bar is visible with all 5 tabs.
    func assertTabBarVisible() {
        XCTAssertTrue(homeTab.exists, "Home tab should exist")
        XCTAssertTrue(scheduleTab.exists, "Schedule tab should exist")
        XCTAssertTrue(myTripsTab.exists, "My Trips tab should exist")
        XCTAssertTrue(progressTab.exists, "Progress tab should exist")
        XCTAssertTrue(settingsTab.exists, "Settings tab should exist")
    }
}

// MARK: - Trip Wizard Screen

struct TripWizardScreen {
    let app: XCUIApplication

    // MARK: Elements

    var cancelButton: XCUIElement {
        app.buttons["Cancel"]
    }

    var planTripButton: XCUIElement {
        app.buttons["wizard.planTripButton"]
    }

    var navigationTitle: XCUIElement {
        app.navigationBars["Plan a Trip"]
    }

    // Planning modes
    func planningModeButton(_ mode: String) -> XCUIElement {
        app.buttons["wizard.planningMode.\(mode)"]
    }

    // Sports
    func sportButton(_ sport: String) -> XCUIElement {
        app.buttons["wizard.sports.\(sport)"]
    }

    // Regions
    func regionButton(_ region: String) -> XCUIElement {
        app.buttons["wizard.regions.\(region)"]
    }

    // Date picker
    var nextMonthButton: XCUIElement {
        app.buttons["wizard.dates.nextMonth"]
    }

    var previousMonthButton: XCUIElement {
        app.buttons["wizard.dates.previousMonth"]
    }

    var monthLabel: XCUIElement {
        app.staticTexts["wizard.dates.monthLabel"]
    }

    func dayButton(_ dateString: String) -> XCUIElement {
        app.buttons["wizard.dates.day.\(dateString)"]
    }

    // MARK: Actions

    /// Waits for the wizard sheet to appear.
    @discardableResult
    func waitForLoad() -> TripWizardScreen {
        navigationTitle.waitForExistenceOrFail(
            timeout: BaseUITestCase.defaultTimeout,
            "Trip Wizard should appear"
        )
        return self
    }

    /// Selects a planning mode by raw value (e.g., "dateRange", "gameFirst", "locations", "followTeam", "teamFirst").
    func selectPlanningMode(_ mode: String) {
        let btn = planningModeButton(mode)
        btn.scrollIntoView(in: app.scrollViews.firstMatch)
        btn.tap()
    }

    /// Selects the "By Dates" planning mode and waits for steps to expand.
    func selectDateRangeMode() {
        selectPlanningMode("dateRange")
    }

    /// Navigates the calendar to a target month/year and selects start/end dates.
    func selectDateRange(
        targetMonth: String,
        targetYear: String,
        startDay: String,
        endDay: String
    ) {
        // Navigate forward to the target month
        let target = "\(targetMonth) \(targetYear)"
        var attempts = 0
        // First ensure the month label is visible
        monthLabel.scrollIntoView(in: app.scrollViews.firstMatch)
        while !monthLabel.label.contains(target) && attempts < 18 {
            nextMonthButton.scrollIntoView(in: app.scrollViews.firstMatch)
            nextMonthButton.waitUntilHittable(timeout: BaseUITestCase.shortTimeout).tap()
            attempts += 1
        }
        XCTAssertTrue(monthLabel.label.contains(target),
                       "Should navigate to \(target)")

        // Select start date — scroll calendar grid into view first
        let startBtn = dayButton(startDay)
        startBtn.scrollIntoView(in: app.scrollViews.firstMatch)
        startBtn.waitUntilHittable(timeout: BaseUITestCase.shortTimeout).tap()

        // Select end date
        let endBtn = dayButton(endDay)
        endBtn.scrollIntoView(in: app.scrollViews.firstMatch)
        endBtn.waitUntilHittable(timeout: BaseUITestCase.shortTimeout).tap()
    }

    /// Selects a sport (e.g., "mlb").
    func selectSport(_ sport: String) {
        let btn = sportButton(sport)
        btn.scrollIntoView(in: app.scrollViews.firstMatch)
        btn.tap()
    }

    /// Selects a region (e.g., "central").
    func selectRegion(_ region: String) {
        let btn = regionButton(region)
        btn.scrollIntoView(in: app.scrollViews.firstMatch)
        btn.tap()
    }

    /// Scrolls to and taps "Plan My Trip".
    func tapPlanTrip() {
        let btn = planTripButton
        btn.scrollIntoView(in: app.scrollViews.firstMatch)
        btn.waitUntilHittable().tap()
    }

    /// Dismisses the wizard via the Cancel button.
    func tapCancel() {
        cancelButton.waitUntilHittable(timeout: BaseUITestCase.shortTimeout).tap()
    }

    // MARK: Assertions

    /// Asserts a specific planning mode button exists and is hittable.
    func assertPlanningModeAvailable(_ mode: String) {
        let btn = planningModeButton(mode)
        btn.scrollIntoView(in: app.scrollViews.firstMatch)
        XCTAssertTrue(btn.isHittable,
                       "Planning mode '\(mode)' should be available")
    }
}

// MARK: - Trip Options Screen

struct TripOptionsScreen {
    let app: XCUIApplication

    // MARK: Elements

    var sortDropdown: XCUIElement {
        app.buttons["tripOptions.sortDropdown"]
    }

    func tripCard(_ index: Int) -> XCUIElement {
        app.buttons["tripOptions.trip.\(index)"]
    }

    func sortOption(_ name: String) -> XCUIElement {
        app.buttons["tripOptions.sortOption.\(name)"]
    }

    // MARK: Actions

    /// Waits for planning results to load.
    @discardableResult
    func waitForLoad() -> TripOptionsScreen {
        sortDropdown.waitForExistenceOrFail(
            timeout: BaseUITestCase.longTimeout,
            "Trip Options should appear after planning completes"
        )
        return self
    }

    /// Selects a trip option card by index.
    func selectTrip(at index: Int) {
        let card = tripCard(index)
        card.scrollIntoView(in: app.scrollViews.firstMatch)
        card.tap()
    }

    /// Opens the sort dropdown and selects an option.
    func sort(by option: String) {
        sortDropdown.waitUntilHittable().tap()
        let optionBtn = sortOption(option)
        optionBtn.waitUntilHittable(timeout: BaseUITestCase.shortTimeout).tap()
    }

    // MARK: Assertions

    /// Asserts at least one trip option is visible.
    func assertHasResults() {
        XCTAssertTrue(tripCard(0).waitForExistence(timeout: BaseUITestCase.shortTimeout),
                       "At least one trip option should exist")
    }
}

// MARK: - Trip Detail Screen

struct TripDetailScreen {
    let app: XCUIApplication

    // MARK: Elements

    var favoriteButton: XCUIElement {
        app.buttons["tripDetail.favoriteButton"]
    }

    var itineraryTitle: XCUIElement {
        app.staticTexts["Itinerary"]
    }

    var statsRow: XCUIElement {
        app.descendants(matching: .any)["tripDetail.statsRow"]
    }

    var pdfExportButton: XCUIElement {
        app.buttons["tripDetail.pdfExportButton"]
    }

    // MARK: Actions

    /// Waits for the trip detail view to load.
    @discardableResult
    func waitForLoad() -> TripDetailScreen {
        favoriteButton.waitForExistenceOrFail(
            timeout: BaseUITestCase.defaultTimeout,
            "Trip Detail should load with favorite button"
        )
        return self
    }

    /// Taps the favorite/save button.
    func tapFavorite() {
        favoriteButton.waitUntilHittable().tap()
    }

    // MARK: Assertions

    /// Asserts the itinerary section is visible.
    func assertItineraryVisible() {
        let title = itineraryTitle
        title.scrollIntoView(in: app.scrollViews.firstMatch)
        XCTAssertTrue(title.exists, "Itinerary section should be visible")
    }

    /// Asserts the stats row (cities, games, distance, driving time) is visible.
    func assertStatsRowVisible() {
        statsRow.scrollIntoView(in: app.scrollViews.firstMatch)
        XCTAssertTrue(statsRow.exists, "Stats row should be visible")
    }

    /// Asserts the favorite button label matches the expected state.
    func assertSaveState(isSaved: Bool) {
        let expected = isSaved ? "Remove from favorites" : "Save to favorites"
        XCTAssertEqual(favoriteButton.label, expected,
                       "Favorite button label should reflect saved state")
    }
}

// MARK: - My Trips Screen

struct MyTripsScreen {
    let app: XCUIApplication

    // MARK: Elements

    var emptyState: XCUIElement {
        // VStack with accessibilityIdentifier can map to different element types on iOS 26;
        // use descendants(matching: .any) for a type-agnostic match.
        app.descendants(matching: .any)["myTrips.emptyState"]
    }

    var savedTripsTitle: XCUIElement {
        app.staticTexts["Saved Trips"]
    }

    /// Returns a saved trip card by index.
    func tripCard(_ index: Int) -> XCUIElement {
        app.descendants(matching: .any)["myTrips.trip.\(index)"]
    }

    // MARK: Actions

    /// Taps a saved trip card by index.
    func tapTrip(at index: Int) {
        let card = tripCard(index)
        card.waitUntilHittable(timeout: BaseUITestCase.defaultTimeout).tap()
    }

    /// Swipes left to delete a saved trip at the given index.
    func deleteTrip(at index: Int) {
        let card = tripCard(index)
        card.waitUntilHittable(timeout: BaseUITestCase.defaultTimeout)
        card.swipeLeft(velocity: .slow)

        // On iOS 26, swipe-to-delete button may be "Delete" or use a trash icon
        let deleteButton = app.buttons["Delete"]
        if deleteButton.waitForExistence(timeout: BaseUITestCase.shortTimeout) {
            deleteButton.tap()
        } else {
            // Fallback: try a more aggressive swipe to trigger full delete
            card.swipeLeft(velocity: .fast)
            // If a delete button appears after the full swipe, tap it
            if deleteButton.waitForExistence(timeout: BaseUITestCase.shortTimeout) {
                deleteButton.tap()
            }
        }
    }

    // MARK: Assertions

    func assertEmpty() {
        XCTAssertTrue(
            emptyState.waitForExistence(timeout: BaseUITestCase.defaultTimeout),
            "Empty state should be visible when no trips saved"
        )
    }

    func assertHasTrips() {
        XCTAssertFalse(emptyState.exists, "Empty state should not show when trips exist")
    }
}

// MARK: - Schedule Screen

struct ScheduleScreen {
    let app: XCUIApplication

    // MARK: Elements

    var searchField: XCUIElement {
        app.searchFields.firstMatch
    }

    var filterButton: XCUIElement {
        // The filter menu button uses an accessibilityLabel
        app.buttons.matching(NSPredicate(
            format: "label CONTAINS 'Filter options'"
        )).firstMatch
    }

    /// Returns a sport filter chip by lowercase sport name (e.g., "mlb").
    func sportChip(_ sport: String) -> XCUIElement {
        app.buttons["schedule.sport.\(sport)"]
    }

    var emptyState: XCUIElement {
        app.descendants(matching: .any)["schedule.emptyState"]
    }

    var resetFiltersButton: XCUIElement {
        app.buttons["schedule.resetFiltersButton"]
    }

    // MARK: Assertions

    func assertLoaded() {
        // Schedule tab should show the filter button with "Filter options" label
        XCTAssertTrue(filterButton.waitForExistence(timeout: BaseUITestCase.defaultTimeout),
                       "Schedule filter button should appear")
    }
}

// MARK: - Settings Screen

struct SettingsScreen {
    let app: XCUIApplication

    // MARK: Elements

    var versionLabel: XCUIElement {
        app.staticTexts["settings.versionLabel"]
    }

    var subscriptionSection: XCUIElement {
        app.staticTexts["Subscription"]
    }

    var privacySection: XCUIElement {
        app.staticTexts["Privacy"]
    }

    var aboutSection: XCUIElement {
        app.staticTexts["About"]
    }

    var upgradeProButton: XCUIElement {
        app.buttons["settings.upgradeProButton"]
    }

    var restorePurchasesButton: XCUIElement {
        app.buttons["settings.restorePurchasesButton"]
    }

    var animationsToggle: XCUIElement {
        app.switches["settings.animationsToggle"]
    }

    var resetButton: XCUIElement {
        app.buttons["settings.resetButton"]
    }

    var syncNowButton: XCUIElement {
        app.buttons["settings.syncNowButton"]
    }

    var appearanceSection: XCUIElement {
        app.staticTexts["Appearance"]
    }

    /// Returns an appearance mode button (e.g., "System", "Light", "Dark").
    func appearanceButton(_ mode: String) -> XCUIElement {
        app.buttons["settings.appearance.\(mode)"]
    }

    // MARK: Assertions

    func assertLoaded() {
        XCTAssertTrue(subscriptionSection.waitForExistence(timeout: BaseUITestCase.defaultTimeout),
                       "Settings should show Subscription section")
    }

    func assertVersionDisplayed() {
        // SwiftUI List renders as UICollectionView on iOS 26, not UITableView
        versionLabel.scrollIntoView(in: app.collectionViews.firstMatch, direction: .down)
        XCTAssertTrue(versionLabel.exists, "App version should be displayed")
        XCTAssertFalse(versionLabel.label.isEmpty, "Version label should not be empty")
    }
}

// MARK: - Progress Screen

struct ProgressScreen {
    let app: XCUIApplication

    // MARK: Elements

    var addVisitButton: XCUIElement {
        app.buttons.matching(NSPredicate(
            format: "label == 'Add stadium visit'"
        )).firstMatch
    }

    var stadiumQuestLabel: XCUIElement {
        app.staticTexts["progress.stadiumQuest"]
    }

    var achievementsTitle: XCUIElement {
        app.staticTexts["progress.achievementsTitle"]
    }

    var recentVisitsTitle: XCUIElement {
        app.staticTexts["progress.recentVisitsTitle"]
    }

    var navigationBar: XCUIElement {
        app.navigationBars.firstMatch
    }

    var sportSelector: XCUIElement {
        app.descendants(matching: .any)["progress.sportSelector"]
    }

    /// Returns a sport button by lowercase sport name (e.g., "mlb").
    func sportButton(_ sport: String) -> XCUIElement {
        app.buttons["progress.sport.\(sport)"]
    }

    // MARK: Actions

    @discardableResult
    func waitForLoad() -> ProgressScreen {
        // Progress tab shows the "Stadium Quest" label once data loads
        let loaded = stadiumQuestLabel.waitForExistence(timeout: BaseUITestCase.longTimeout)
            || navigationBar.waitForExistence(timeout: BaseUITestCase.shortTimeout)
        XCTAssertTrue(loaded, "Progress tab should load")
        return self
    }

    // MARK: Assertions

    func assertLoaded() {
        XCTAssertTrue(
            navigationBar.waitForExistence(timeout: BaseUITestCase.defaultTimeout),
            "Progress tab should load"
        )
    }

    func assertAchievementsSectionVisible() {
        achievementsTitle.scrollIntoView(in: app.scrollViews.firstMatch)
        XCTAssertTrue(achievementsTitle.exists, "Achievements section should be visible")
    }
}

// MARK: - Polls Screen

struct PollsScreen {
    let app: XCUIApplication

    // MARK: Elements

    var navigationTitle: XCUIElement {
        app.navigationBars["Group Polls"]
    }

    var joinPollButton: XCUIElement {
        app.buttons.matching(NSPredicate(
            format: "label == 'Join a poll'"
        )).firstMatch
    }

    var emptyState: XCUIElement {
        app.staticTexts["No Polls"]
    }

    // MARK: Actions

    @discardableResult
    func waitForLoad() -> PollsScreen {
        navigationTitle.waitForExistenceOrFail(
            timeout: BaseUITestCase.defaultTimeout,
            "Polls list should load"
        )
        return self
    }

    // MARK: Assertions

    func assertLoaded() {
        XCTAssertTrue(
            navigationTitle.waitForExistence(timeout: BaseUITestCase.defaultTimeout),
            "Group Polls navigation title should exist"
        )
    }

    func assertEmpty() {
        XCTAssertTrue(
            emptyState.waitForExistence(timeout: BaseUITestCase.defaultTimeout),
            "Polls empty state should be visible"
        )
    }
}

// MARK: - Paywall Screen

struct PaywallScreen {
    let app: XCUIApplication

    // MARK: Elements

    var upgradeTitle: XCUIElement {
        app.staticTexts["paywall.title"]
    }

    var unlimitedTripsPill: XCUIElement {
        app.staticTexts["Unlimited Trips"]
    }

    var pdfExportPill: XCUIElement {
        app.staticTexts["PDF Export"]
    }

    var progressPill: XCUIElement {
        app.staticTexts["Progress"]
    }

    // MARK: Actions

    @discardableResult
    func waitForLoad() -> PaywallScreen {
        upgradeTitle.waitForExistenceOrFail(
            timeout: BaseUITestCase.defaultTimeout,
            "Paywall should appear with 'Upgrade to Pro' title"
        )
        return self
    }

    // MARK: Assertions

    func assertLoaded() {
        XCTAssertTrue(
            upgradeTitle.waitForExistence(timeout: BaseUITestCase.defaultTimeout),
            "Paywall title should exist"
        )
    }

    func assertFeaturePillsVisible() {
        XCTAssertTrue(unlimitedTripsPill.exists, "'Unlimited Trips' pill should exist")
        XCTAssertTrue(pdfExportPill.exists, "'PDF Export' pill should exist")
    }
}

// MARK: - Shared Test Flows

/// Reusable multi-step flows that multiple tests share.
/// Avoids duplicating the full wizard sequence across test files.
enum TestFlows {

    /// Opens the wizard, plans a date-range trip (June 11-16 2026, MLB, Central), and
    /// waits for the Trip Options screen to load.
    ///
    /// Returns the screens needed to continue interacting with results.
    @discardableResult
    static func planDateRangeTrip(
        app: XCUIApplication,
        month: String = "June",
        year: String = "2026",
        startDay: String = "2026-06-11",
        endDay: String = "2026-06-16",
        sport: String = "mlb",
        region: String = "central"
    ) -> (wizard: TripWizardScreen, options: TripOptionsScreen) {
        let home = HomeScreen(app: app)
        home.waitForLoad()
        home.tapStartPlanning()

        let wizard = TripWizardScreen(app: app)
        wizard.waitForLoad()
        wizard.selectDateRangeMode()

        wizard.nextMonthButton.scrollIntoView(in: app.scrollViews.firstMatch)
        wizard.selectDateRange(
            targetMonth: month,
            targetYear: year,
            startDay: startDay,
            endDay: endDay
        )
        wizard.selectSport(sport)
        wizard.selectRegion(region)
        wizard.tapPlanTrip()

        let options = TripOptionsScreen(app: app)
        options.waitForLoad()
        options.assertHasResults()

        return (wizard, options)
    }

    /// Plans a trip, selects the first option, and navigates to the detail screen.
    @discardableResult
    static func planAndSelectFirstTrip(
        app: XCUIApplication
    ) -> (wizard: TripWizardScreen, detail: TripDetailScreen) {
        let (wizard, options) = planDateRangeTrip(app: app)
        options.selectTrip(at: 0)

        let detail = TripDetailScreen(app: app)
        detail.waitForLoad()

        return (wizard, detail)
    }
}