using AcDream.App.UI;
using AcDream.App.UI.Layout;

namespace AcDream.App.Tests.UI.Layout;

/// <summary>
/// Golden conformance tests for the vitals LayoutDesc importer.
/// Uses the committed JSON fixture (<c>vitals_2100006C.json</c>) — no dats, no GL.
///
/// These tests lock the importer's tree-building (factory dispatch, meter slice
/// extraction, rects) against the real portal.dat values captured when the
/// fixture was generated. Any regression in <see cref="LayoutImporter"/>,
/// <see cref="DatWidgetFactory"/>, or <see cref="ElementReader"/> will surface here.
///
/// Sprite ids sourced from <c>docs/research/2026-06-15-layoutdesc-format.md §11</c>.
/// </summary>
public class LayoutConformanceTests
{
    // ── Test 1: Three meters at expected rects ────────────────────────────────

    /// <summary>
    /// The three vital bars must be UiMeters positioned at x=5, width=150, height=16,
    /// at y=5 (health), y=21 (stamina), y=37 (mana).
    /// </summary>
    [Fact]
    public void VitalsTree_HasThreeMetersAtExpectedRects()
    {
        var layout = FixtureLoader.LoadVitals();

        (uint Id, float Y)[] expected =
        [
            (0x100000E6u, 5f),   // health
            (0x100000ECu, 21f),  // stamina
            (0x100000EEu, 37f),  // mana
        ];

        foreach (var (id, y) in expected)
        {
            var elem = layout.FindElement(id);
            Assert.NotNull(elem);
            var meter = Assert.IsType<UiMeter>(elem);
            Assert.Equal(5f,   meter.Left);
            Assert.Equal(y,    meter.Top);
            Assert.Equal(150f, meter.Width);
            Assert.Equal(16f,  meter.Height);
        }
    }

    // ── Test 2: All 18 slice ids ──────────────────────────────────────────────

    /// <summary>
    /// The six back+front 3-slice sprite ids for each of the three meters must
    /// match the values confirmed from the dat dump (format doc §11).
    /// This proves the factory's grandchild slice extraction against committed data.
    /// </summary>
    [Fact]
    public void VitalsTree_MetersHaveExpectedSliceIds()
    {
        var layout = FixtureLoader.LoadVitals();

        // Health bar
        {
            var elem = layout.FindElement(0x100000E6u);
            var m = Assert.IsType<UiMeter>(elem);
            Assert.Equal(0x0600747Eu, m.BackLeft);
            Assert.Equal(0x0600747Fu, m.BackTile);
            Assert.Equal(0x06007480u, m.BackRight);
            Assert.Equal(0x06007481u, m.FrontLeft);
            Assert.Equal(0x06007482u, m.FrontTile);
            Assert.Equal(0x06007483u, m.FrontRight);
        }

        // Stamina bar
        {
            var elem = layout.FindElement(0x100000ECu);
            var m = Assert.IsType<UiMeter>(elem);
            Assert.Equal(0x06007484u, m.BackLeft);
            Assert.Equal(0x06007485u, m.BackTile);
            Assert.Equal(0x06007486u, m.BackRight);
            Assert.Equal(0x06007487u, m.FrontLeft);
            Assert.Equal(0x06007488u, m.FrontTile);
            Assert.Equal(0x06007489u, m.FrontRight);
        }

        // Mana bar
        {
            var elem = layout.FindElement(0x100000EEu);
            var m = Assert.IsType<UiMeter>(elem);
            Assert.Equal(0x0600748Au, m.BackLeft);
            Assert.Equal(0x0600748Bu, m.BackTile);
            Assert.Equal(0x0600748Cu, m.BackRight);
            Assert.Equal(0x0600748Du, m.FrontLeft);
            Assert.Equal(0x0600748Eu, m.FrontTile);
            Assert.Equal(0x0600748Fu, m.FrontRight);
        }
    }

    // ── Test 3: Chrome TL corner sprite ───────────────────────────────────────

    /// <summary>
    /// The top-left chrome corner element (id <c>0x10000633</c>) must be a
    /// <see cref="UiDatElement"/> whose active media file id is <c>0x060074C3</c>.
    /// </summary>
    [Fact]
    public void VitalsTree_ChromeCornerHasExpectedSprite()
    {
        var layout = FixtureLoader.LoadVitals();

        var elem = layout.FindElement(0x10000633u);
        Assert.NotNull(elem);
        var datElem = Assert.IsType<UiDatElement>(elem);
        var (file, _) = datElem.ActiveMedia();
        Assert.Equal(0x060074C3u, file);
    }
}