using AcDream.Core.Physics;
using Xunit;

namespace AcDream.Core.Tests.Physics;

/// <summary>
/// R3-W1 — pins <see cref="WeenieError"/>'s numeric values against the
/// definitive retail table in
/// docs/research/2026-07-02-r3-motioninterp/W0-pins.md §A10 (an exhaustive
/// sweep of every <c>return &lt;code&gt;</c> site across raw 304908-306277 +
/// 300150-300540: 19 return sites + 1 store site, all attributed). These
/// codes are local-only (never on the wire), so the renumber from the
/// pre-R3 shuffled names is a safe rename — this test is the single
/// source of truth that a future edit can't silently un-pin.
/// </summary>
public sealed class WeenieErrorCodeTableTests
{
    [Fact]
    public void None_Is0x00()
        => Assert.Equal(0x00u, (uint)WeenieError.None);

    [Fact]
    public void NoPhysicsObject_Is0x08()
        => Assert.Equal(0x08u, (uint)WeenieError.NoPhysicsObject);

    /// <summary>
    /// 0x0B — NoMotionInterpreter. R4-V1 addition (M12), per
    /// docs/research/2026-07-03-r4-moveto/r4-moveto-decomp.md §12 constants
    /// inventory row (<c>8, 0xb, 0x36, 0x37, 0x38, 0x3d, 0x47</c>).
    /// </summary>
    [Fact]
    public void NoMotionInterpreter_Is0x0B()
        => Assert.Equal(0x0Bu, (uint)WeenieError.NoMotionInterpreter);

    [Fact]
    public void NotGrounded_Is0x24()
        => Assert.Equal(0x24u, (uint)WeenieError.NotGrounded);

    [Fact]
    public void CrouchInCombatStance_Is0x3f()
        => Assert.Equal(0x3fu, (uint)WeenieError.CrouchInCombatStance);

    [Fact]
    public void SitInCombatStance_Is0x40()
        => Assert.Equal(0x40u, (uint)WeenieError.SitInCombatStance);

    [Fact]
    public void SleepInCombatStance_Is0x41()
        => Assert.Equal(0x41u, (uint)WeenieError.SleepInCombatStance);

    [Fact]
    public void ChatEmoteOutsideNonCombat_Is0x42()
        => Assert.Equal(0x42u, (uint)WeenieError.ChatEmoteOutsideNonCombat);

    /// <summary>
    /// 0x36 — ActionCancelled. R4-V1 addition (M12). Site:
    /// <c>MoveToManager::PerformMovement</c> (§3a @0052a901) — every new
    /// moveto cancels the previous one with this code before dispatching;
    /// also <c>CPhysicsObj::interrupt_current_movement</c>'s
    /// <c>MovementManager::CancelMoveTo(0x36)</c> call (§9e). Per §7c, the
    /// arg is NEVER READ inside <c>MoveToManager::CancelMoveTo</c>'s body in
    /// this build — kept for parity/logging, not behavior.
    /// </summary>
    [Fact]
    public void ActionCancelled_Is0x36()
        => Assert.Equal(0x36u, (uint)WeenieError.ActionCancelled);

    /// <summary>
    /// 0x37 — ObjectGone. R4-V1 addition (M12). Site:
    /// <c>MoveToManager::HandleUpdateTarget</c> (§6d @307866-307867) —
    /// retarget delivery with a non-OK target status.
    /// </summary>
    [Fact]
    public void ObjectGone_Is0x37()
        => Assert.Equal(0x37u, (uint)WeenieError.ObjectGone);

    /// <summary>
    /// 0x38 — NoObject. R4-V1 addition (M12). Site:
    /// <c>MoveToManager::HandleUpdateTarget</c> (§6d @307857-307858) — the
    /// FIRST target callback arrives with a non-OK status (target never
    /// resolved).
    /// </summary>
    [Fact]
    public void NoObject_Is0x38()
        => Assert.Equal(0x38u, (uint)WeenieError.NoObject);

    [Fact]
    public void ActionDepthExceeded_Is0x45()
        => Assert.Equal(0x45u, (uint)WeenieError.ActionDepthExceeded);

    [Fact]
    public void GeneralMovementFailure_Is0x47()
        => Assert.Equal(0x47u, (uint)WeenieError.GeneralMovementFailure);

    [Fact]
    public void YouCantJumpFromThisPosition_Is0x48()
        => Assert.Equal(0x48u, (uint)WeenieError.YouCantJumpFromThisPosition);

    [Fact]
    public void CantJumpLoadedDown_Is0x49()
        => Assert.Equal(0x49u, (uint)WeenieError.CantJumpLoadedDown);

    /// <summary>
    /// 0x3D — YouChargedTooFar. R4-V1 addition (M12). Site:
    /// <c>MoveToManager::HandleMoveToPosition</c> Phase 2 arrival check —
    /// <c>fail_distance</c> exceeded (r4-moveto-decomp.md §6b).
    /// </summary>
    [Fact]
    public void YouChargedTooFar_Is0x3D()
        => Assert.Equal(0x3Du, (uint)WeenieError.YouChargedTooFar);

    /// <summary>
    /// Every code in the A10 table in one pass — guards against a
    /// future partial edit desyncing an individual test above from the
    /// enum declaration.
    /// </summary>
    [Theory]
    [InlineData(WeenieError.None, 0x00u)]
    [InlineData(WeenieError.NoPhysicsObject, 0x08u)]
    [InlineData(WeenieError.NoMotionInterpreter, 0x0Bu)]
    [InlineData(WeenieError.NotGrounded, 0x24u)]
    [InlineData(WeenieError.ActionCancelled, 0x36u)]
    [InlineData(WeenieError.ObjectGone, 0x37u)]
    [InlineData(WeenieError.NoObject, 0x38u)]
    [InlineData(WeenieError.CrouchInCombatStance, 0x3fu)]
    [InlineData(WeenieError.SitInCombatStance, 0x40u)]
    [InlineData(WeenieError.SleepInCombatStance, 0x41u)]
    [InlineData(WeenieError.ChatEmoteOutsideNonCombat, 0x42u)]
    [InlineData(WeenieError.ActionDepthExceeded, 0x45u)]
    [InlineData(WeenieError.GeneralMovementFailure, 0x47u)]
    [InlineData(WeenieError.YouCantJumpFromThisPosition, 0x48u)]
    [InlineData(WeenieError.CantJumpLoadedDown, 0x49u)]
    [InlineData(WeenieError.YouChargedTooFar, 0x3Du)]
    public void A10Table_EveryCode_MatchesRetailNumericValue(WeenieError code, uint expected)
        => Assert.Equal(expected, (uint)code);
}