using AcDream.App.UI;
using AcDream.App.UI.Layout;
using AcDream.Core.Net.Messages;
using AcDream.Core.Physics;
using AcDream.Core.Ui;
using AcDream.Core.World;

namespace AcDream.App.Tests.UI.Layout;

/// <summary>
/// Unit coverage for <see cref="MapPageController"/>'s pure math: the
/// calendar formatter (<c>"Date: %s\nTime: %s"</c>,
/// <c>gmMapUI::Update @0x004a1eb0</c>) and the 53-town static table
/// (verbatim port of <c>s_rgLocations</c>). Marker-placement math itself is
/// <see cref="RadarCoordinates"/>/<see cref="LandDefs.GidToLcoord"/> — both
/// already unit-tested elsewhere; this file only proves the wiring
/// reproduces their output through the real fixture (no re-derivation).
/// </summary>
public sealed class MapPageControllerTests
{
    // ── Calendar formatter ───────────────────────────────────────────────

    [Fact]
    public void FormatDateTime_OrdinaryHour_NoAndHalfSuffix()
    {
        var calendar = new DerethDateTime.Calendar(
            119, DerethDateTime.MonthName.Frostfell, 27, DerethDateTime.HourName.Dawnsong);

        string text = MapPageController.FormatDateTime(calendar);

        Assert.Equal("Date: Frostfell 27, 119 P.Y.\nTime: Dawnsong", text);
    }

    [Fact]
    public void FormatDateTime_AndHalfHour_RewritesSuffixWithHyphens()
    {
        var calendar = new DerethDateTime.Calendar(
            10, DerethDateTime.MonthName.Morningthaw, 1, DerethDateTime.HourName.MorntideAndHalf);

        string text = MapPageController.FormatDateTime(calendar);

        Assert.Equal("Date: Morningthaw 1, 10 P.Y.\nTime: Morntide-and-Half", text);
    }

    [Theory]
    [InlineData(DerethDateTime.HourName.Darktide, "Darktide")]
    [InlineData(DerethDateTime.HourName.DarktideAndHalf, "Darktide-and-Half")]
    [InlineData(DerethDateTime.HourName.Gloaming, "Gloaming")]
    [InlineData(DerethDateTime.HourName.GloamingAndHalf, "Gloaming-and-Half")]
    [InlineData(DerethDateTime.HourName.WarmtideAndHalf, "Warmtide-and-Half")]
    public void FormatDateTime_EveryHourName_MatchesExpectedDisplayText(
        DerethDateTime.HourName hour, string expectedHourText)
    {
        var calendar = new DerethDateTime.Calendar(
            10, DerethDateTime.MonthName.Morningthaw, 1, hour);

        string text = MapPageController.FormatDateTime(calendar);

        Assert.EndsWith($"Time: {expectedHourText}", text);
    }

    // ── Town table ────────────────────────────────────────────────────────

    [Fact]
    public void MapLocations_Has53Entries()
    {
        Assert.Equal(53, MapLocations.All.Length);
    }

    [Fact]
    public void MapLocations_AllNamesAreUnique()
    {
        var names = new HashSet<string>(StringComparer.Ordinal);
        foreach (MapLocation loc in MapLocations.All)
            Assert.True(names.Add(loc.Name), $"duplicate town name: {loc.Name}");
    }

    [Fact]
    public void MapLocations_Holtburg_MatchesDecompiledByteValues()
    {
        // s_rgLocations[0x13] (pc:977379): X=0xa4 Y=0x4d W=9 H=8.
        MapLocation holtburg = Assert.Single(MapLocations.All, l => l.Name == "Holtburg");
        Assert.Equal(0xa4, holtburg.X);
        Assert.Equal(0x4d, holtburg.Y);
        Assert.Equal(9, holtburg.Width);
        Assert.Equal(8, holtburg.Height);
    }

    [Fact]
    public void MapLocations_EveryRectIsWithinTheMapWidgetsAuthoredExtent()
    {
        // m_pMap's own authored size (MapHousePanelSlotProbeTests: markerArea
        // (6,8)-(247,258) — the widest observed extent). Town rects are
        // independent of the marker-area rect but should still land inside
        // a sane 0..300 canvas — a coarse sanity check that the verbatim
        // port didn't transpose a digit.
        foreach (MapLocation loc in MapLocations.All)
        {
            Assert.InRange(loc.X, 0, 260);
            Assert.InRange(loc.Y, 0, 260);
            Assert.InRange(loc.Width, 1, 20);
            Assert.InRange(loc.Height, 1, 20);
        }
    }

    // ── Marker placement wiring (real fixture, no re-derivation) ────────────

    [Fact]
    public void Bind_PlayerMarker_OutdoorCell_ReproducesRadarCoordinatesPlacement()
    {
        // Arwic's landblock cell id (0x11CE0001 — an arbitrary real outdoor
        // cell, picked only because RadarCoordinates.TryFromCell already
        // proves gid-to-lcoord conformance elsewhere; this test proves the
        // WIRING, not the formula).
        const uint cellId = 0x11CE0001u;
        Assert.True(RadarCoordinates.TryFromCell(cellId, out RadarCoordinates expected));

        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        var callbacks = new MapHousePanelController.Callbacks(
            Toggle: () => { },
            Map: new MapPageController.Bindings(
                CurrentCalendar: static () => default,
                PlayerCellId: () => cellId,
                HousePosition: static () => (CreateObject.ServerPosition?)null,
                TemplateResolver: (_, e) => new UiText { Width = 10f, Height = 10f, DatElementId = e }),
            House: new HousePageController.Bindings(Lines: static () => Array.Empty<string>()));

        MapHousePanelController? controller = MapHousePanelController.Bind(rootInfo, layout, callbacks);
        Assert.NotNull(controller);

        UiElement? playerIcon = UiElement.FindDescendant(controller!.Root, MapPageController.PlayerIconId);
        Assert.NotNull(playerIcon);
        Assert.True(playerIcon!.Visible);

        // markerArea from the live fixture (MapHousePanelSlotProbeTests):
        // (6,8)-(247,258) -> m_x0=6, m_y0=8.
        const int markerX0 = 6, markerY0 = 8;
        Assert.Equal(markerX0 + (float)expected.X - playerIcon.Width / 2f, playerIcon.Left, precision: 3);
        Assert.Equal(markerY0 + (float)expected.Y - playerIcon.Height / 2f, playerIcon.Top, precision: 3);
    }

    [Fact]
    public void Bind_PlayerMarker_IndoorCell_HidesIconAndClearsCoordinateText()
    {
        // Envcell low word (>= 0x100) fails RadarCoordinates.TryFromCell —
        // the indoor branch (gmMapUI::Update's else: SetVisible(0)).
        const uint indoorCellId = 0x0012_0100u;
        Assert.False(RadarCoordinates.TryFromCell(indoorCellId, out _));

        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        var callbacks = new MapHousePanelController.Callbacks(
            Toggle: () => { },
            Map: new MapPageController.Bindings(
                CurrentCalendar: static () => default,
                PlayerCellId: () => indoorCellId,
                HousePosition: static () => (CreateObject.ServerPosition?)null,
                TemplateResolver: (_, e) => new UiText { Width = 10f, Height = 10f, DatElementId = e }),
            House: new HousePageController.Bindings(Lines: static () => Array.Empty<string>()));

        MapHousePanelController? controller = MapHousePanelController.Bind(rootInfo, layout, callbacks);
        Assert.NotNull(controller);

        UiElement? playerIcon = UiElement.FindDescendant(controller!.Root, MapPageController.PlayerIconId);
        Assert.NotNull(playerIcon);
        Assert.False(playerIcon!.Visible);
    }

    [Fact]
    public void Bind_HouseMarker_NullPosition_StaysHidden()
    {
        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        var callbacks = new MapHousePanelController.Callbacks(
            Toggle: () => { },
            Map: new MapPageController.Bindings(
                CurrentCalendar: static () => default,
                PlayerCellId: static () => 0u,
                HousePosition: static () => (CreateObject.ServerPosition?)null,
                TemplateResolver: (_, e) => new UiText { Width = 10f, Height = 10f, DatElementId = e }),
            House: new HousePageController.Bindings(Lines: static () => Array.Empty<string>()));

        MapHousePanelController? controller = MapHousePanelController.Bind(rootInfo, layout, callbacks);
        Assert.NotNull(controller);

        UiElement? houseIcon = UiElement.FindDescendant(controller!.Root, MapPageController.HouseIconId);
        Assert.NotNull(houseIcon);
        Assert.False(houseIcon!.Visible);
    }
}