using System.Text.RegularExpressions;

namespace MBN_STOCK_WEBVIEW.LegacyWeb.Tests;

public sealed class LegacyWorkspaceLayoutContractTests
{
    private static readonly string RepositoryRoot = FindRepositoryRoot();
    private static readonly string WebRoot = Path.Combine(
        RepositoryRoot,
        "src",
        "MBN_STOCK_WEBVIEW.LegacyParityApp",
        "Web");
    private static readonly string Markup = File.ReadAllText(Path.Combine(WebRoot, "index.html"));
    private static readonly string Styles = File.ReadAllText(Path.Combine(WebRoot, "styles.css"));
    private static readonly string App = File.ReadAllText(Path.Combine(WebRoot, "app.js"));
    private static readonly string Navigation = File.ReadAllText(
        Path.Combine(WebRoot, "workspace-navigation.js"));

    [Fact]
    public void ShellUsesSidebarScreensBesidePersistentSchedule()
    {
        var workspaceStart = Markup.IndexOf("id=\"workspace-region\"", StringComparison.Ordinal);
        var navigationStart = Markup.IndexOf("id=\"workspace-navigation\"", StringComparison.Ordinal);
        var marketStart = Markup.IndexOf("id=\"market-tabs\"", StringComparison.Ordinal);
        var settingsTabStart = Markup.IndexOf("id=\"workspace-settings-tab\"", StringComparison.Ordinal);
        var stockStart = Markup.IndexOf("id=\"stock-workspace\"", StringComparison.Ordinal);
        var catalogStart = Markup.IndexOf("id=\"catalog-workspace\"", StringComparison.Ordinal);
        var settingsStart = Markup.IndexOf("id=\"settings-workspace\"", StringComparison.Ordinal);
        var scheduleStart = Markup.IndexOf("class=\"playlist-panel\"", StringComparison.Ordinal);

        Assert.True(workspaceStart >= 0);
        Assert.True(navigationStart > workspaceStart);
        Assert.True(marketStart > navigationStart);
        Assert.True(settingsTabStart > marketStart);
        Assert.True(stockStart > settingsTabStart);
        Assert.True(catalogStart > stockStart);
        Assert.True(settingsStart > catalogStart);
        Assert.True(scheduleStart > settingsStart);
        Assert.Matches(
            @"<\/section>\s*<\/div>\s*<\/section>\s*<\/section>\s*<section class=""playlist-panel""",
            Markup);
        Assert.Matches("id=\"catalog-workspace\"[^>]*hidden inert", Markup);
        Assert.Matches("id=\"settings-workspace\"[^>]*hidden inert", Markup);
        Assert.Contains("<small>항상 표시</small><h2>송출 스케줄</h2>", Markup,
            StringComparison.Ordinal);
    }

    [Fact]
    public void SidebarOwnsEachNativeMarketButtonAndKeepsSettingsOutsideTheirOrder()
    {
        var marketStart = Markup.IndexOf("<div id=\"market-tabs\"", StringComparison.Ordinal);
        var marketEnd = Markup.IndexOf("</div>", marketStart, StringComparison.Ordinal);
        Assert.True(marketStart >= 0 && marketEnd > marketStart);
        var marketMarkup = Markup[marketStart..marketEnd];
        var expected = new[]
        {
            "overseas", "exchange", "index", "kospiIndustry", "kosdaqIndustry",
            "comparison", "theme", "overseasStocks", "expert", "tradingHalt"
        };
        var actual = Regex.Matches(marketMarkup, "data-tab-id=\"([^\"]+)\"")
            .Select(match => match.Groups[1].Value)
            .ToArray();

        Assert.Equal(expected, actual);
        Assert.Equal(expected.Length, Regex.Matches(marketMarkup, "<button\\b").Count);
        Assert.DoesNotContain("workspace-settings-tab", marketMarkup, StringComparison.Ordinal);
        Assert.Contains("workspace-nav-label", marketMarkup, StringComparison.Ordinal);
    }

    [Fact]
    public void WorkAndScheduleUseResponsiveTwoToOneColumns()
    {
        Assert.Contains(
            "grid-template-columns: minmax(900px, 2fr) minmax(600px, 1fr);",
            Styles,
            StringComparison.Ordinal);
        Assert.Contains(
            "grid-template-rows: 66px minmax(0, 1fr) auto;",
            Styles,
            StringComparison.Ordinal);
        Assert.Contains(".workspace-nav-footer", Styles, StringComparison.Ordinal);
        Assert.Contains(".workspace-navigation .market-tabs button", Styles,
            StringComparison.Ordinal);
        Assert.Matches(
            new Regex(
                @"\.playlist-toolbar\s*\{[^}]*flex-wrap:\s*wrap",
                RegexOptions.CultureInvariant),
            Styles);
        Assert.Matches(
            new Regex(
                @"\.playlist-row\s*\{[^}]*min-width:\s*600px",
                RegexOptions.CultureInvariant),
            Styles);
    }

    [Fact]
    public void SidebarIsOneLabelledAndFullyControlledNavigationRegion()
    {
        Assert.Matches(
            "id=\"workspace-navigation\"[^>]*role=\"navigation\"[^>]*aria-label=",
            Markup);
        Assert.Matches(
            "id=\"workspace-nav-toggle\"[^>]*aria-expanded=\"true\"[\\s\\S]*?" +
            "aria-controls=\"workspace-nav-items workspace-nav-footer\"",
            Markup);
        Assert.Matches(
            "id=\"workspace-nav-items\"[^>]*role=\"group\"[^>]*aria-label=",
            Markup);
        Assert.Matches(
            "id=\"market-tabs\"[^>]*role=\"group\"[^>]*aria-label=",
            Markup);
        Assert.Contains(
            "id=\"workspace-nav-footer\" class=\"workspace-nav-footer\"",
            Markup,
            StringComparison.Ordinal);
    }

    [Fact]
    public void ModernOperatorThemePreservesAccessibleAndSemanticStates()
    {
        Assert.Contains(
            "Modern operator theme: visual-only overrides; geometry and native contracts stay intact",
            Styles,
            StringComparison.Ordinal);
        Assert.Contains("--ui-canvas:", Styles, StringComparison.Ordinal);
        Assert.Contains("--ui-accent:", Styles, StringComparison.Ordinal);
        Assert.Contains("--ui-success:", Styles, StringComparison.Ordinal);
        Assert.Contains("--ui-danger:", Styles, StringComparison.Ordinal);
        Assert.Contains(
            "font-family: \"Segoe UI Variable\", \"Segoe UI\", \"Noto Sans KR\"",
            Styles,
            StringComparison.Ordinal);
        Assert.Matches(
            new Regex(
                @"button:focus-visible,[\s\S]*?outline:\s*2px solid var\(--ui-accent\)",
                RegexOptions.CultureInvariant),
            Styles);
        Assert.Contains(".playlist-data-row.on-air.selected", Styles, StringComparison.Ordinal);
        Assert.Contains(".playout-actions .take-in:not(:disabled)", Styles, StringComparison.Ordinal);
        Assert.Contains(".playout-actions .next:not(:disabled)", Styles, StringComparison.Ordinal);
        Assert.Contains(".playout-actions .take-out:not(:disabled)", Styles, StringComparison.Ordinal);
        Assert.Contains(
            ".playlist-data-row[data-active=\"true\"]:not(.on-air)",
            Styles,
            StringComparison.Ordinal);
        Assert.Contains(
            ".playlist-data-row[aria-selected=\"true\"]:not(.on-air)",
            Styles,
            StringComparison.Ordinal);
        Assert.Contains("@media (forced-colors: active)", Styles, StringComparison.Ordinal);
        Assert.Contains("scrollbar-gutter: stable", Styles, StringComparison.Ordinal);
        Assert.Contains("@media (prefers-reduced-motion: reduce)", Styles, StringComparison.Ordinal);
        Assert.Contains("aria-keyshortcuts=\"F8\"", Markup, StringComparison.Ordinal);
        Assert.Contains("aria-keyshortcuts=\"Escape\"", Markup, StringComparison.Ordinal);
        Assert.Contains(
            ".connection-state.dry-run:not(.outcome-unknown)",
            Styles,
            StringComparison.Ordinal);
        Assert.Contains("accessibleStates.push(\"현재 PGM\")", App, StringComparison.Ordinal);
        Assert.Contains("accessibleStates.push(\"송출 후보\")", App, StringComparison.Ordinal);
        Assert.Contains("accessibleStates.push(\"삭제 선택됨\")", App, StringComparison.Ordinal);
        Assert.Matches(
            new Regex(
                @"id=""stock-search-button""[\s\S]*?<svg[^>]*viewBox=""0 0 24 24""",
                RegexOptions.CultureInvariant),
            Markup);
        Assert.Matches(
            new Regex(
                @"class=""playlist-heading-icon""[\s\S]*?<svg[^>]*viewBox=""0 0 24 24""",
                RegexOptions.CultureInvariant),
            Markup);
    }

    [Fact]
    public void NavigationChangesPresentationWithoutNativeOrStoredState()
    {
        Assert.Contains("entry.view.hidden = !isCurrent", Navigation, StringComparison.Ordinal);
        Assert.Contains(
            "entry.view.toggleAttribute(\"inert\", !isCurrent)",
            Navigation,
            StringComparison.Ordinal);
        Assert.Contains("settingsTab.addEventListener(\"click\"", Navigation,
            StringComparison.Ordinal);
        Assert.Contains("syncMarket(button.dataset.tabId)", Navigation,
            StringComparison.Ordinal);
        Assert.Contains("menuButton.click()", Navigation, StringComparison.Ordinal);
        Assert.Contains("pendingKeyboardMarketTabId", Navigation, StringComparison.Ordinal);
        Assert.Contains("pendingButton.focus()", Navigation, StringComparison.Ordinal);
        Assert.Contains("LegacyWorkspaceNavigation", Navigation, StringComparison.Ordinal);
        Assert.Contains("nav-collapsed", Navigation, StringComparison.Ordinal);
        Assert.DoesNotContain("postMessage", Navigation, StringComparison.Ordinal);
        Assert.DoesNotContain("localStorage", Navigation, StringComparison.Ordinal);
        Assert.DoesNotContain("sessionStorage", Navigation, StringComparison.Ordinal);
    }

    private static string FindRepositoryRoot()
    {
        var directory = new DirectoryInfo(AppContext.BaseDirectory);
        while (directory is not null)
        {
            if (File.Exists(Path.Combine(directory.FullName, "MBN_STOCK_WEBVIEW.sln")))
            {
                return directory.FullName;
            }

            directory = directory.Parent;
        }

        throw new DirectoryNotFoundException("Repository root could not be located.");
    }
}