using System.IO;
using AcDream.App.UI;
using AcDream.App.UI.Layout;
using AcDream.Content;
using DatReaderWriter;
using DatReaderWriter.Options;
using StringTable = DatReaderWriter.DBObjs.StringTable;

namespace AcDream.App.Tests.UI.Layout;

/// <summary>
/// Installed-retail-DAT acceptance gate for LA8. Opt in with
/// <c>ACDREAM_PROBE_LIVE_MOUNT=1</c>; <c>ACDREAM_DAT_DIR</c> can override the
/// ordinary Documents/Asheron's Call location. Reads the DATs read-only.
/// </summary>
public sealed class CharacterManagementLiveDatTests
{
    [InstalledDatFact]
    public void EnumTable5_ResolvesAndImportsTheExactRetailScreenAndDialogs()
    {
        string datDirectory = Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR")
            ?? Path.Combine(
                Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
                "Documents",
                "Asheron's Call");
        using var dats = new DatCollection(datDirectory, DatAccessType.Read);

        const uint expectedLayoutDid = 0x21000004u;
        uint layoutDid = RetailDataIdResolver.Resolve(
            dats,
            CharacterManagementUiController.RootEnum,
            5u);
        Assert.Equal(expectedLayoutDid, layoutDid);
        Console.WriteLine(
            "[LA8-DAT] category=5 enum=0x10000005 -> DID=0x21000004; "
            + "selected-root=0x1000039A");

        ElementInfo rootInfo = Assert.IsType<ElementInfo>(
            LayoutImporter.ImportInfos(
                dats,
                layoutDid,
                CharacterManagementUiController.RootElementId));
        Assert.Equal(800f, rootInfo.Width);
        Assert.Equal(600f, rootInfo.Height);
        Assert.Equal(8, rootInfo.Children.Count);
        Assert.Equal(0x06007576u, rootInfo.StateMedia[""].File);
        ImportedLayout screen = LayoutImporter.Build(
            rootInfo,
            _ => (0u, 0, 0),
            null,
            null,
            new DatStringResolver(dats).Resolve);

        var list = Assert.IsType<UiTemplateListBox>(screen.FindElement(
            CharacterManagementUiController.ListElementId));
        UiTemplateListEntry template = Assert.Single(list.Templates);
        Assert.Equal(expectedLayoutDid, template.TemplateLayoutId);
        Assert.Equal(0x100003A5u, template.TemplateElementId);
        AssertButton(screen, CharacterManagementUiController.CreateElementId,
            "Create Character");
        AssertButton(screen, CharacterManagementUiController.EnterElementId,
            "ENTER");
        AssertButton(screen, CharacterManagementUiController.DeleteElementId,
            "DELETE");
        AssertButton(screen, CharacterManagementUiController.RestoreElementId,
            "RESTORE");
        Assert.DoesNotContain(
            Descendants(screen.Root),
            static element => element is UiViewport);

        ElementInfo rowInfo = Assert.IsType<ElementInfo>(
            LayoutImporter.ImportInfos(dats, layoutDid, template.TemplateElementId));
        Assert.Equal(1u, rowInfo.Type);
        Assert.Equal(160f, rowInfo.Width);
        Assert.Equal(16f, rowInfo.Height);
        Assert.Equal(0x40000009u, rowInfo.FontDid);
        Assert.Equal(
        [
            UiButtonStateMachine.Normal,
            UiButtonStateMachine.NormalRollover,
            UiButtonStateMachine.NormalPressed,
            UiButtonStateMachine.Highlight,
            UiButtonStateMachine.HighlightRollover,
            uint.MaxValue,
        ],
            rowInfo.States.Keys.Order().ToArray());

        uint dialogDid = RetailDataIdResolver.Resolve(dats, 2u, 5u);
        Assert.Equal(0x2100003Cu, dialogDid);
        ImportedLayout message = BuildSelected(dats, dialogDid, 0x24u);
        Assert.IsType<UiDialogRoot>(message.Root);
        Assert.IsType<UiText>(message.FindElement(0x3Eu));
        Assert.IsType<UiButton>(message.FindElement(0x26u));
        ImportedLayout delete = BuildSelected(dats, dialogDid, 0x2Cu);
        Assert.IsType<UiDialogRoot>(delete.Root);
        Assert.IsType<UiField>(delete.FindElement(0x2Cu));
        Assert.IsType<UiButton>(delete.FindElement(0x2Eu));
        Assert.IsType<UiButton>(delete.FindElement(0x2Fu));

        var strings = new DatStringResolver(dats);
        const uint table = 0x23000002u;
        Assert.Equal("DELETE", Resolve(strings, table,
            "ID_CharacterManagement_DeleteCharacterResponse"));
        Assert.Equal("Please Wait", Resolve(strings, table,
            "ID_CharacterManagement_PleaseWait"));
        Assert.Equal("Entering World", Resolve(strings, table,
            "ID_Character_EnteringWorld"));
        string confirmation = Assert.IsType<string>(strings.ResolveTemplate(
            table,
            "ID_CharacterManagement_DeleteCharacterConfirmation",
            new Dictionary<uint, string>
            {
                [DatStringResolver.PlayerVariable] = "Test Character",
            }));
        Assert.Contains("Test Character", confirmation);
        Assert.Contains("'DELETE'", confirmation);

        StringTable stringTable = Assert.IsType<StringTable>(dats.Get<StringTable>(table));
        var deleteEntry = stringTable.Strings[
            DatStringResolver.ComputeHash(
                "ID_CharacterManagement_DeleteCharacterConfirmation")];
        Assert.Equal([DatStringResolver.PlayerVariable], deleteEntry.Variables);
    }

    private static ImportedLayout BuildSelected(
        IDatReaderWriter dats,
        uint layoutDid,
        uint rootId)
    {
        ElementInfo info = Assert.IsType<ElementInfo>(
            LayoutImporter.ImportInfos(dats, layoutDid, rootId));
        return LayoutImporter.Build(
            info,
            _ => (0u, 0, 0),
            null,
            null,
            new DatStringResolver(dats).Resolve);
    }

    private static string Resolve(
        DatStringResolver strings,
        uint table,
        string key) => Assert.IsType<string>(strings.Resolve(
            table,
            DatStringResolver.ComputeHash(key)));

    private static void AssertButton(
        ImportedLayout layout,
        uint elementId,
        string label) => Assert.Equal(
            label,
            Assert.IsType<UiButton>(layout.FindElement(elementId)).Label);

    private static IEnumerable<UiElement> Descendants(UiElement root)
    {
        yield return root;
        foreach (UiElement child in root.Children)
            foreach (UiElement descendant in Descendants(child))
                yield return descendant;
    }
}

internal sealed class InstalledDatFactAttribute : FactAttribute
{
    public InstalledDatFactAttribute()
    {
        if (Environment.GetEnvironmentVariable("ACDREAM_PROBE_LIVE_MOUNT") != "1")
        {
            Skip = "Set ACDREAM_PROBE_LIVE_MOUNT=1 to run the installed-DAT LA8 gate.";
            return;
        }

        string datDirectory = Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR")
            ?? Path.Combine(
                Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
                "Documents",
                "Asheron's Call");
        if (!File.Exists(Path.Combine(datDirectory, "client_portal.dat")))
            Skip = $"Installed client_portal.dat is required at '{datDirectory}'.";
    }
}