using System;
using System.IO;
using System.Linq;
using Paca.Core.QuickActions;
using Xunit;

namespace Paca.Tests.App;

public class QuickActionAdvancedUxAndLocalizationGateTests
{
    private static readonly string SolutionRoot = Path.GetFullPath(Path.Combine(AppContext.BaseDirectory, "..", "..", "..", "..", ".."));
    private readonly string _xamlPath;
    private readonly string _csPath;

    public QuickActionAdvancedUxAndLocalizationGateTests()
    {
        _xamlPath = Path.Combine(SolutionRoot, "src", "Paca.App", "QuickActionLauncherWindow.xaml");
        _csPath = Path.Combine(SolutionRoot, "src", "Paca.App", "QuickActionLauncherWindow.xaml.cs");
    }

    [Fact]
    public void Gate_QuickAction_CrossLanguageSearch_SupportsKoreanEnglishJapanese()
    {
        var catalog = new QuickActionCatalog();
        var searchEngine = new QuickActionSearchEngine(catalog);

        // Korean search
        var koResults = searchEngine.Search("새 탭");
        Assert.NotEmpty(koResults);
        Assert.Equal("browser.new_tab", koResults[0].Action.Id);

        // English search
        var enResults = searchEngine.Search("new tab");
        Assert.NotEmpty(enResults);
        Assert.Equal("browser.new_tab", enResults[0].Action.Id);

        // Screenshot
        var shotKo = searchEngine.Search("스크린샷");
        var shotEn = searchEngine.Search("screenshot");
        Assert.NotEmpty(shotKo);
        Assert.NotEmpty(shotEn);
    }

    [Fact]
    public void Gate_QuickAction_CategoryFilter_FiltersAccurately()
    {
        var catalog = new QuickActionCatalog();
        var searchEngine = new QuickActionSearchEngine(catalog);

        var browserOnly = searchEngine.Search(string.Empty, maxResults: 50, categoryFilter: QuickActionCategory.Browser);
        Assert.NotEmpty(browserOnly);
        Assert.All(browserOnly, r => Assert.Equal(QuickActionCategory.Browser, r.Action.Category));

        var devOnly = searchEngine.Search(string.Empty, maxResults: 50, categoryFilter: QuickActionCategory.Developer);
        Assert.NotEmpty(devOnly);
        Assert.All(devOnly, r => Assert.Equal(QuickActionCategory.Developer, r.Action.Category));
    }

    [Fact]
    public void Gate_QuickAction_AutocompleteSuggestion_ReturnsTopTitle()
    {
        var catalog = new QuickActionCatalog();
        var searchEngine = new QuickActionSearchEngine(catalog);

        string? suggestion = searchEngine.GetTopSuggestion("새");
        Assert.NotNull(suggestion);
        Assert.StartsWith("새", suggestion);
    }

    [Fact]
    public void Gate_QuickAction_DisplayLocalization_ResultsContainLocalizedStringsForCulture()
    {
        var catalog = new QuickActionCatalog();
        var searchEngine = new QuickActionSearchEngine(catalog);

        // English culture
        var enResults = searchEngine.Search("new tab", cultureCode: "en-US");
        Assert.NotEmpty(enResults);
        Assert.Equal("New Tab", enResults[0].Title);
        Assert.Equal("Browser", enResults[0].CategoryName);

        // Japanese culture
        var jaResults = searchEngine.Search("new tab", cultureCode: "ja-JP");
        Assert.NotEmpty(jaResults);
        Assert.Contains("タブ", jaResults[0].Title);
        Assert.Equal("ブラウザ", jaResults[0].CategoryName);

        // Korean culture
        var koResults = searchEngine.Search("new tab", cultureCode: "ko-KR");
        Assert.NotEmpty(koResults);
        Assert.Equal("새 탭 열기", koResults[0].Title);
        Assert.Equal("브라우저", koResults[0].CategoryName);
    }

    [Fact]
    public void Gate_QuickAction_Xaml_UsesStrictDesignTokensAndUnclippedShadow()
    {
        Assert.True(File.Exists(_xamlPath));
        var xaml = File.ReadAllText(_xamlPath);

        // Root font inheritance from SSOT
        Assert.Contains("FontFamily=\"{DynamicResource UiFont}\"", xaml);

        // Correct token check: CardBgHover must be used, NOT CardHoverBg
        Assert.DoesNotContain("CardHoverBg", xaml);
        Assert.Contains("CardBgHover", xaml);

        // Selection token check
        Assert.Contains("SelectionBrush", xaml);

        // Category chips and autocomplete hint
        Assert.Contains("CategoryChipBar", xaml);
        Assert.Contains("AutocompleteHintText", xaml);

        // Unclipped shadow margin
        Assert.Contains("Margin=\"20\"", xaml);
    }

    [Fact]
    public void Gate_QuickAction_CodeBehind_SupportsKeyboardNavigationAndShortcuts()
    {
        Assert.True(File.Exists(_csPath));
        var cs = File.ReadAllText(_csPath);

        // Quick numbers Ctrl+1 ~ Ctrl+9
        Assert.Contains("ExecuteQuickNumberAction", cs);

        // Golden ratio positioning
        Assert.Contains("0.28", cs);

        // Autocomplete Tab logic & Right arrow
        Assert.Contains("Key.Tab", cs);
        Assert.Contains("Key.Right", cs);

        // SetForegroundWindow for input conflict defense
        Assert.Contains("SetForegroundWindow", cs);

        // Category prefix triggers
        Assert.Contains("CheckCategoryPrefixTrigger", cs);
    }
}