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

namespace AcDream.App.Tests.UI.Layout;

/// <summary>
/// Unit tests for <see cref="CharacterController"/> and <see cref="SampleData.SampleCharacter"/>.
/// No dats, no GL — pure data-wiring + report-content tests.
/// </summary>
public class CharacterControllerTests
{
    // ── Test 1: Bind finds the main text element and sets LinesProvider ───────

    [Fact]
    public void Bind_SetsLinesProviderOnMainText()
    {
        var text = new UiText();
        var layout = FakeLayout((CharacterController.MainTextId, text));

        CharacterController.Bind(layout, SampleData.SampleCharacter);

        // LinesProvider must be replaced (default returns empty).
        var lines = text.LinesProvider();
        Assert.True(lines.Count > 0, "Expected non-empty report after Bind");
    }

    // ── Test 2: Report contains all six attribute names (decomp order 1,2,4,3,5,6) ───

    [Fact]
    public void Bind_ReportContainsAllSixAttributes()
    {
        var text = new UiText();
        var layout = FakeLayout((CharacterController.MainTextId, text));

        CharacterController.Bind(layout, SampleData.SampleCharacter);

        var allText = string.Join("\n", text.LinesProvider().Select(l => l.Text));

        Assert.Contains("Strength",     allText);
        Assert.Contains("Endurance",    allText);
        Assert.Contains("Quickness",    allText);
        Assert.Contains("Coordination", allText);
        Assert.Contains("Focus",        allText);
        Assert.Contains("Self",         allText);
    }

    // ── Test 3: Report contains vitals section ────────────────────────────────

    [Fact]
    public void Bind_ReportContainsVitals()
    {
        var text = new UiText();
        var layout = FakeLayout((CharacterController.MainTextId, text));

        CharacterController.Bind(layout, SampleData.SampleCharacter);

        var allText = string.Join("\n", text.LinesProvider().Select(l => l.Text));

        Assert.Contains("Health",  allText);
        Assert.Contains("Stamina", allText);
        Assert.Contains("Mana",    allText);
    }

    // ── Test 4: Report contains encumbrance / burden section ─────────────────

    [Fact]
    public void Bind_ReportContainsBurden()
    {
        var text = new UiText();
        var layout = FakeLayout((CharacterController.MainTextId, text));

        CharacterController.Bind(layout, SampleData.SampleCharacter);

        var allText = string.Join("\n", text.LinesProvider().Select(l => l.Text));

        Assert.Contains("Burden",   allText);
        Assert.Contains("Capacity", allText);
    }

    // ── Test 5: Report contains the sample character's name ──────────────────

    [Fact]
    public void Bind_ReportContainsSampleName()
    {
        var text = new UiText();
        var layout = FakeLayout((CharacterController.MainTextId, text));

        CharacterController.Bind(layout, SampleData.SampleCharacter);

        var allText = string.Join("\n", text.LinesProvider().Select(l => l.Text));

        // SampleData.SampleCharacter().Name == "Studio Player"
        Assert.Contains("Studio Player", allText);
    }

    // ── Test 6: Missing element id is a no-op (no throw) ─────────────────────

    [Fact]
    public void Bind_MissingElement_DoesNotThrow()
    {
        // Layout does not contain MainTextId — Bind must silently skip.
        var layout = FakeLayout();   // empty layout

        // Must not throw.
        CharacterController.Bind(layout, SampleData.SampleCharacter);
    }

    // ── Test 7: Element that is NOT a UiText is silently skipped ─────────────

    [Fact]
    public void Bind_WrongElementType_DoesNotThrow()
    {
        // Place a UiMeter at the MainTextId — Bind must skip (not crash on wrong type).
        var meter = new UiMeter();
        var layout = FakeLayout((CharacterController.MainTextId, meter));

        CharacterController.Bind(layout, SampleData.SampleCharacter);
        // No exception; meter is unchanged.
    }

    // ── Test 8: SampleCharacter fixture has non-zero attribute values ─────────

    [Fact]
    public void SampleCharacter_AttributesAreNonZero()
    {
        var s = SampleData.SampleCharacter();

        Assert.True(s.Strength     > 0, "Strength must be > 0");
        Assert.True(s.Endurance    > 0, "Endurance must be > 0");
        Assert.True(s.Quickness    > 0, "Quickness must be > 0");
        Assert.True(s.Coordination > 0, "Coordination must be > 0");
        Assert.True(s.Focus        > 0, "Focus must be > 0");
        Assert.True(s.Self         > 0, "Self must be > 0");
    }

    // ── Test 9: SampleCharacter fixture has coherent vitals ──────────────────

    [Fact]
    public void SampleCharacter_VitalsAreCoherent()
    {
        var s = SampleData.SampleCharacter();

        Assert.True(s.HealthCurrent  > 0 && s.HealthCurrent  <= s.HealthMax,  "Health cur must be in [1, max]");
        Assert.True(s.StaminaCurrent > 0 && s.StaminaCurrent <= s.StaminaMax, "Stamina cur must be in [1, max]");
        Assert.True(s.ManaCurrent    > 0 && s.ManaCurrent    <= s.ManaMax,    "Mana cur must be in [1, max]");
    }

    // ── Test 10: Report contains attribute VALUES from the fixture ────────────

    [Fact]
    public void Bind_ReportContainsSampleAttributeValues()
    {
        var text = new UiText();
        var layout = FakeLayout((CharacterController.MainTextId, text));

        var sheet = SampleData.SampleCharacter();
        CharacterController.Bind(layout, () => sheet);

        var allText = string.Join("\n", text.LinesProvider().Select(l => l.Text));

        // All six attribute values should appear as strings in the report.
        Assert.Contains(sheet.Strength.ToString(),     allText);
        Assert.Contains(sheet.Endurance.ToString(),    allText);
        Assert.Contains(sheet.Quickness.ToString(),    allText);
        Assert.Contains(sheet.Coordination.ToString(), allText);
        Assert.Contains(sheet.Focus.ToString(),        allText);
        Assert.Contains(sheet.Self.ToString(),         allText);
    }

    // ── Helpers ───────────────────────────────────────────────────────────────

    private static ImportedLayout FakeLayout(params (uint id, UiElement e)[] items)
    {
        var dict = new Dictionary<uint, UiElement>();
        var root = new UiPanel();
        foreach (var (id, e) in items)
        {
            root.AddChild(e);
            dict[id] = e;
        }
        return new ImportedLayout(root, dict);
    }
}