using System.Text.RegularExpressions;

namespace MBN_STOCK_WEBVIEW.LegacyWeb.Tests;

public sealed class LegacyGraphClickParityWebTests
{
    private static readonly string App = File.ReadAllText(Path.Combine(
        FindRepositoryRoot(),
        "src",
        "MBN_STOCK_WEBVIEW.LegacyParityApp",
        "Web",
        "app.js"));

    [Fact]
    public void Uc3_targets_select_on_single_click_and_fill_slots_only_on_double_click()
    {
        var doubleStart = App.IndexOf(
            "categoryTree.addEventListener(\"dblclick\"",
            StringComparison.Ordinal);
        var clickStart = App.IndexOf(
            "categoryTree.addEventListener(\"click\"",
            doubleStart + 1,
            StringComparison.Ordinal);
        var changeStart = App.IndexOf(
            "categoryTree.addEventListener(\"change\"",
            clickStart + 1,
            StringComparison.Ordinal);
        Assert.True(doubleStart >= 0 && clickStart > doubleStart && changeStart > clickStart);
        var doubleClick = App[doubleStart..clickStart];
        var singleClick = App[clickStart..changeStart];

        foreach (var intent in new[]
                 {
                     "choose-comparison-domestic",
                     "choose-comparison-world",
                     "choose-comparison-fixed"
                 })
        {
            Assert.Contains($"\"{intent}\"", doubleClick, StringComparison.Ordinal);
            Assert.DoesNotContain($"\"{intent}\"", singleClick, StringComparison.Ordinal);
        }

        foreach (var intent in new[]
                 {
                     "select-comparison-domestic",
                     "select-comparison-world",
                     "select-comparison-fixed"
                 })
        {
            Assert.Contains($"\"{intent}\"", singleClick, StringComparison.Ordinal);
            Assert.DoesNotContain($"\"{intent}\"", doubleClick, StringComparison.Ordinal);
        }

        Assert.Contains("comparisonTargetClickTimer", singleClick, StringComparison.Ordinal);
        Assert.Contains("}, 250);", singleClick, StringComparison.Ordinal);
    }

    [Fact]
    public void Vi_result_single_click_selects_and_double_click_adds_without_duplicate_intent()
    {
        var start = App.IndexOf("function renderManualLists", StringComparison.Ordinal);
        var end = App.IndexOf("function openNamedPlaylist", start, StringComparison.Ordinal);
        Assert.True(start >= 0 && end > start);
        var manual = App[start..end];

        Assert.Matches(
            new Regex(
                "addEventListener\\(\"click\"[\\s\\S]*?setTimeout[\\s\\S]*?send\\(\"select-manual-vi-result\"",
                RegexOptions.CultureInvariant),
            manual);
        Assert.Matches(
            new Regex(
                "addEventListener\\(\"dblclick\"[\\s\\S]*?clearDelayedClick\\(manualViResultClickTimer\\)[\\s\\S]*?send\\(\"add-manual-vi-result\"",
                RegexOptions.CultureInvariant),
            manual);
    }

    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 was not found.");
    }
}