using AcDream.App.UI.Layout;
using AcDream.Content;
using DatReaderWriter;

namespace AcDream.App.Tests.UI.Layout;

/// <summary>
/// Campaign CT slice CT2 (2026-08-24) pin: <see cref="CharacterTitleResolver"/>
/// against the installed DAT set, end to end (EnumMapper 0x22000041 -&gt;
/// compute_str_hash -&gt; StringTable 0x2300000E). CT1's research doc
/// (docs/research/2026-08-24-campaign-ct-dat-ground-truth.md §5) verified
/// id 13 == "War Mage" against ACE's <c>CharacterTitle.WarMage</c>; this
/// pin adds several more low-ordinal ids from the same enum
/// (<c>CharacterTitle.cs</c>: Invalid=0, Adventurer=1, Archer=2,
/// Blademaster=3, LifeMage=5, Wayfarer=14) so a DAT revision or resolver
/// regression fails loudly instead of drifting unnoticed into CT3/CT4.
/// Follows the durable-pin pattern of <see cref="ChatStringsLiveDatTests"/>.
/// </summary>
[Trait("Lane", "InstalledDat")]
public sealed class CharacterTitleResolverLiveDatTests
{
    private static string DatDirectory =>
        System.Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR")
        ?? Path.Combine(
            System.Environment.GetFolderPath(System.Environment.SpecialFolder.UserProfile),
            "Documents", "Asheron's Call");

    [InstalledDatFact]
    public void Resolve_PinsSeveralTitleIdsToTheirRetailDisplayStrings()
    {
        using var dats = new DatCollection(DatDirectory, DatReaderWriter.Options.DatAccessType.Read);
        var resolver = new CharacterTitleResolver(new DatCollectionAdapter(dats));

        // Retail's own early-return: id 0 (Invalid) never resolves.
        Assert.Null(resolver.Resolve(0u));

        Assert.Equal("Adventurer", resolver.Resolve(1u));
        Assert.Equal("Archer", resolver.Resolve(2u));
        Assert.Equal("Blademaster", resolver.Resolve(3u));
        Assert.Equal("Life Mage", resolver.Resolve(5u));
        Assert.Equal("War Mage", resolver.Resolve(13u));
        Assert.Equal("Wayfarer", resolver.Resolve(14u));
    }

    [InstalledDatFact]
    public void Resolve_UnmappedId_ReturnsNull()
    {
        using var dats = new DatCollection(DatDirectory, DatReaderWriter.Options.DatAccessType.Read);
        var resolver = new CharacterTitleResolver(new DatCollectionAdapter(dats));

        Assert.Null(resolver.Resolve(0xFFFFFFFEu));
    }

    [InstalledDatFact]
    public void Resolve_CachesTheEnumMapperAcrossCalls()
    {
        // Not a durable behavioral pin — just confirms the lazy-load path
        // used by the assertions above resolves the SAME value on a second
        // call (the cached-mapper branch), not only on the first (cold) one.
        using var dats = new DatCollection(DatDirectory, DatReaderWriter.Options.DatAccessType.Read);
        var resolver = new CharacterTitleResolver(new DatCollectionAdapter(dats));

        string? first = resolver.Resolve(13u);
        string? second = resolver.Resolve(13u);

        Assert.Equal("War Mage", first);
        Assert.Equal(first, second);
    }
}