using System.Text.RegularExpressions;

namespace MBN_STOCK_WEBVIEW.LegacyWeb.Tests;

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

    [Fact]
    public void ShellExposesOriginalStockCutPlaylistAndPlayoutControls()
    {
        foreach (var id in new[]
                 {
                     "stock-search",
                     "stock-search-button",
                     "stock-results",
                     "cut-list",
                     "playlist-drop-zone",
                     "playlist-rows",
                     "legacy-dialog"
                 })
        {
            Assert.Contains($"id=\"{id}\"", Markup, StringComparison.Ordinal);
        }

        Assert.Contains("TAKE IN", Markup, StringComparison.Ordinal);
        Assert.Contains("TAKE OUT", Markup, StringComparison.Ordinal);
        Assert.Contains("NEXT", Markup, StringComparison.Ordinal);
        Assert.Matches("class=\"connection-state\"[^>]*>미연결</div>", Markup);
        Assert.Contains(
            "class=\"active\" type=\"button\" disabled>해외</button>",
            Markup,
            StringComparison.Ordinal);
        Assert.Contains(
            "type=\"button\" disabled>정지</button>",
            Markup,
            StringComparison.Ordinal);
    }

    [Fact]
    public void WebLayerDoesNotOwnSceneDatabaseIdentityOrPlaylistState()
    {
        Assert.DoesNotMatch(
            new Regex("(?:sceneCode|cutCode|stockCode|dataCode|builderKey)"),
            App);
        Assert.DoesNotMatch(
            new Regex("(?:localStorage|sessionStorage|playlist\\.push|fetch\\s*\\()"),
            App);
        Assert.DoesNotMatch(
            new Regex("\\b(?:5001|N5001|5006|5011|5086|8035|8061|8040|8046|8051|8056|8003|5037)\\b"),
            App);
    }

    [Fact]
    public void DoubleClickUsesPointerFactsInsteadOfBrowserPolicy()
    {
        Assert.Contains("cut-pointer-down", App, StringComparison.Ordinal);
        Assert.Contains("timestampMilliseconds", App, StringComparison.Ordinal);
        Assert.Contains("event.ctrlKey", App, StringComparison.Ordinal);
        Assert.Contains("event.shiftKey", App, StringComparison.Ordinal);
        Assert.DoesNotContain("dblclick", App, StringComparison.Ordinal);
    }

    [Fact]
    public void CutRowsAreReconciledInPlace()
    {
        Assert.Contains("dataset.physicalIndex", App, StringComparison.Ordinal);
        Assert.Contains("function createCutElement", App, StringComparison.Ordinal);
        Assert.DoesNotContain("cutList.replaceChildren", App, StringComparison.Ordinal);
    }

    [Fact]
    public void StockAndPlaylistRowsPreserveNativeControlFocus()
    {
        Assert.Contains("dataset.resultIndex", App, StringComparison.Ordinal);
        Assert.Contains("dataset.rowId", App, StringComparison.Ordinal);
        Assert.DoesNotContain("stockResults.replaceChildren", App, StringComparison.Ordinal);
        Assert.DoesNotContain("playlistRows.replaceChildren", App, StringComparison.Ordinal);
    }

    [Fact]
    public void SeparatorRowsPreserveOriginalDragGesture()
    {
        Assert.Contains("element.draggable = true", App, StringComparison.Ordinal);
        Assert.DoesNotContain("draggable = !row.isSeparator", App, StringComparison.Ordinal);
    }

    [Fact]
    public void BusySnapshotFreezesControlsWithoutQueueingInput()
    {
        Assert.Contains("state.isBusy === true", App, StringComparison.Ordinal);
        Assert.Contains("classList.toggle(\"busy\"", App, StringComparison.Ordinal);
        Assert.Contains(
            "body.busy .operator-shell { pointer-events: none; }",
            Styles,
            StringComparison.Ordinal);
    }

    private static string FindRepositoryRoot()
    {
        DirectoryInfo? directory = new(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("The repository root could not be located.");
    }
}