using System;
using System.IO;
using System.Runtime.CompilerServices;
using System.Text.Json;
using AcDream.App.UI.Layout;
using DatReaderWriter;
using DatReaderWriter.Options;

namespace AcDream.App.Tests.UI.Layout;

/// <summary>
/// One-off generator for the committed chat golden fixture. Skipped by default —
/// run manually with the real dats present (set ACDREAM_DAT_DIR) to regenerate
/// chat_2100006f.json, then commit it. Mirrors how vitals_2100006C.json was made.
///
/// <para>
/// Campaign CH slice CH6a swapped the imported main-chat LayoutDesc from the
/// wrong <c>0x21000006</c> (a different, unrelated chat layout whose root
/// <c>0x1000000E</c> and 800px resize bar <c>0x1000000F</c> appear nowhere in
/// the EoR gameplay UI) to retail's actual main chat window,
/// <c>0x2100006F</c> (window element <c>0x10000601</c>, layout root
/// <c>0x10000600</c>, authored 410x100 — see
/// docs/research/2026-08-09-chat-retail-window-shell.md §2.1 and §5). The old
/// <c>chat_21000006.json</c> fixture is retired with it.
/// </para>
/// </summary>
public class ChatLayoutFixtureGenerator
{
    [Fact(Skip = "manual: regenerates the committed chat fixture; needs the real dats (ACDREAM_DAT_DIR)")]
    public void GenerateChatFixture()
    {
        var datDir = Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR")
            ?? Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
                            "Documents", "Asheron's Call");
        using var dats = new DatCollection(datDir, DatAccessType.Read);
        var info = LayoutImporter.ImportInfos(dats, 0x2100006Fu);
        Assert.NotNull(info);

        var json = JsonSerializer.Serialize(info, new JsonSerializerOptions
        {
            IncludeFields = true,
            WriteIndented = true,
        });
        File.WriteAllText(FixturePath(), json);
    }

    // Resolve the SOURCE fixtures dir (not bin/) from this file's compile-time path.
    private static string FixturePath([CallerFilePath] string thisFile = "")
        => Path.Combine(Path.GetDirectoryName(thisFile)!, "fixtures", "chat_2100006f.json");
}