//
//  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["Create new trip"]
    }

    // 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 the "By Dates" planning mode and waits for steps to expand.
    func selectDateRangeMode() {
        let btn = planningModeButton("dateRange")
        btn.scrollIntoView(in: app.scrollViews.firstMatch)
        btn.tap()
    }

    /// 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: - 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"]
    }

    // 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 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"]
    }

    // 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
    }

    // 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"]
    }

    // 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")
    }
}