//
//  FavoriteFlowUITests.swift
//  FocaleUITests
//
//  Author: Simon-Pierre Boucher
//  Contact: contact@spboucher.ai
//
//  Regression test for the heart-button crash: the PHPhotoLibrary change
//  block must stay isolation-free (Swift 6) or tapping the favorite
//  button kills the app on PhotoKit's queue.
//

import XCTest

final class FavoriteFlowUITests: XCTestCase {

    override func setUpWithError() throws {
        continueAfterFailure = false
    }

    @MainActor
    func testHeartToggleTogglesAndDoesNotCrash() throws {
        let app = XCUIApplication()
        app.launch()

        // The test runner reinstalls the app, which resets the photo
        // permission: walk through onboarding + the system dialog if shown.
        let allowButton = app.buttons["Autoriser l'accès à mes photos"]
        if allowButton.waitForExistence(timeout: 5) {
            allowButton.tap()
            let springboard = XCUIApplication(bundleIdentifier: "com.apple.springboard")
            let fullAccess = springboard.buttons.matching(NSPredicate(
                format: "label CONTAINS[c] 'toutes' OR label CONTAINS[c] 'complet' OR label CONTAINS[c] 'Allow'"
            )).firstMatch
            if fullAccess.waitForExistence(timeout: 8) {
                fullAccess.tap()
            }
        }

        let libraryTab = app.buttons["Bibliothèque"].firstMatch
        XCTAssertTrue(libraryTab.waitForExistence(timeout: 20), "Library tab should exist")
        libraryTab.tap()

        let thumbnail = app.buttons.matching(identifier: "photo-thumbnail").firstMatch
        XCTAssertTrue(thumbnail.waitForExistence(timeout: 15), "At least one photo thumbnail")
        thumbnail.tap()

        let addFavorite = app.buttons["Ajouter aux favoris"]
        let removeFavorite = app.buttons["Retirer des favoris"]
        XCTAssertTrue(
            addFavorite.waitForExistence(timeout: 10) || removeFavorite.exists,
            "Favorite button should be visible in the viewer toolbar"
        )

        let startedAsFavorite = removeFavorite.exists
        (startedAsFavorite ? removeFavorite : addFavorite).tap()

        // Optimistic UI: the label flips immediately, and the app survives
        // the PhotoKit write that crashed build 3.
        let flipped = startedAsFavorite ? addFavorite : removeFavorite
        XCTAssertTrue(flipped.waitForExistence(timeout: 5), "Heart state should flip after tap")

        // Give the PhotoKit change block time to run (the old crash fired here).
        Thread.sleep(forTimeInterval: 2)
        XCTAssertEqual(app.state, .runningForeground, "App must survive the favorite write")

        // Toggle back so the test leaves the library as it found it.
        flipped.tap()
        let restored = startedAsFavorite ? removeFavorite : addFavorite
        XCTAssertTrue(restored.waitForExistence(timeout: 5), "Heart state should flip back")
        Thread.sleep(forTimeInterval: 2)
        XCTAssertEqual(app.state, .runningForeground)
    }
}