//
//  AppThemeTests.swift
//  Tests iOS
//
//  App theme tests: browse themes sheet, verify all 12 theme cards exist,
//  and apply a theme without crashing.
//  TC-070
//

import XCTest

final class AppThemeTests: BaseUITestCase {
    override var seedFixture: String? { "single_mood" }
    override var bypassSubscription: Bool { true }

    /// All 12 app theme names (must match the accessibility IDs: apptheme_card_{lowercased name}).
    private let allThemes = [
        "Zen Garden", "Synthwave", "Celestial", "Editorial",
        "Mixtape", "Bloom", "Heartfelt", "Minimal",
        "Luxe", "Forecast", "Playful", "Journal"
    ]

    /// TC-070: Open Browse Themes sheet and verify all 12 theme cards exist.
    func testBrowseThemes_AllCardsExist() {
        let tabBar = TabBarScreen(app: app)
        let settingsScreen = tabBar.tapSettings()
        settingsScreen.assertVisible()

        // Tap Browse Themes button
        let browseButton = settingsScreen.browseThemesButton
        XCTAssertTrue(
            browseButton.waitForExistence(timeout: 5),
            "Browse Themes button should exist"
        )
        browseButton.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()

        // Wait for the themes sheet to appear
        // Look for any theme card as an indicator that the sheet loaded
        let firstCard = app.descendants(matching: .any)
            .matching(identifier: "apptheme_card_zen garden")
            .firstMatch
        XCTAssertTrue(
            firstCard.waitForExistence(timeout: 5),
            "Themes sheet should appear with theme cards"
        )

        // Verify all 12 theme cards are accessible (some may require scrolling)
        for theme in allThemes {
            let card = app.descendants(matching: .any)
                .matching(identifier: "apptheme_card_\(theme.lowercased())")
                .firstMatch
            if !card.exists {
                // Scroll down to find cards that are off-screen
                app.swipeUp()
            }
            XCTAssertTrue(
                card.waitForExistence(timeout: 3),
                "Theme card '\(theme)' should exist in the Browse Themes sheet"
            )
        }

        captureScreenshot(name: "browse_themes_all_cards")
    }

    /// TC-070: Apply a representative set of themes and verify no crash.
    func testApplyThemes_NoCrash() {
        let tabBar = TabBarScreen(app: app)
        let settingsScreen = tabBar.tapSettings()
        settingsScreen.assertVisible()

        // Open Browse Themes sheet
        let browseBtn = settingsScreen.browseThemesButton
        _ = browseBtn.waitForExistence(timeout: 5)
        browseBtn.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()

        // Wait for sheet to load
        let firstCard = app.descendants(matching: .any)
            .matching(identifier: "apptheme_card_zen garden")
            .firstMatch
        _ = firstCard.waitForExistence(timeout: 5)

        // Tap a representative sample of themes: first, middle, last
        let sampled = ["Zen Garden", "Heartfelt", "Journal"]
        for theme in sampled {
            let card = app.descendants(matching: .any)
                .matching(identifier: "apptheme_card_\(theme.lowercased())")
                .firstMatch
            if !card.exists {
                app.swipeUp()
            }
            if card.waitForExistence(timeout: 3) {
                card.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()

                // A preview sheet or confirmation may appear — dismiss it
                // Look for an "Apply" or close button and tap if present
                let applyButton = app.buttons["Apply"]
                if applyButton.waitForExistence(timeout: 2) {
                    applyButton.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
                }
            }
        }

        captureScreenshot(name: "themes_applied")

        // Dismiss the themes sheet by swiping down or tapping Done
        let doneButton = app.buttons["Done"]
        if doneButton.waitForExistence(timeout: 2) {
            doneButton.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
        } else {
            // Swipe down to dismiss the sheet
            app.swipeDown()
        }

        // Navigate to Day tab and verify no crash — entry row should still exist
        tabBar.tapDay()

        let entryRow = app.descendants(matching: .any)
            .matching(NSPredicate(format: "identifier BEGINSWITH %@", "entry_row_"))
            .firstMatch
        XCTAssertTrue(
            entryRow.waitForExistence(timeout: 5),
            "Entry row should still be visible after applying themes (no crash)"
        )

        captureScreenshot(name: "day_view_after_theme_change")
    }
}