Initial commit: Theriapolis baseline at port/godot branch point

Captures the pre-Godot-port state of the codebase. This is the rollback anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md). All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-04-30 20:40:51 -07:00
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+namespace Theriapolis.Core.Rules.Stats;
+
+/// <summary>
+/// Body-size category from clades.md. Determines tactical-tile footprint,
+/// reach, equipment fit, and grappling rules.
+/// </summary>
+public enum SizeCategory : byte
+{
+    Tiny        = 0,  // reserved; no Phase 5 species uses this
+    Small       = 1,  // rabbit-folk, housecat-folk, ferret-folk
+    Medium      = 2,  // fox-folk, deer-folk, ram-folk, leopard-folk, badger-folk, hare-folk
+    MediumLarge = 3,  // wolf-folk, elk-folk, lion-folk, wolverine-folk, coyote-folk
+    Large       = 4,  // brown bear-folk, polar bear-folk, moose-folk, bull-folk, bison-folk
+    Huge        = 5,  // reserved; no Phase 5 species uses this
+}
+
+public static class SizeExtensions
+{
+    /// <summary>Tactical-tile footprint per side (1 = 1×1, 2 = 2×2).</summary>
+    public static int FootprintTiles(this SizeCategory s) => s switch
+    {
+        SizeCategory.Tiny        => 1,
+        SizeCategory.Small       => 1,
+        SizeCategory.Medium      => 1,
+        SizeCategory.MediumLarge => 1,   // counts as Large for grappling/carrying only
+        SizeCategory.Large       => 2,
+        SizeCategory.Huge        => 3,
+        _ => throw new ArgumentOutOfRangeException(nameof(s)),
+    };
+
+    /// <summary>Default melee reach in tactical tiles (weapon-modifiable).</summary>
+    public static int DefaultReachTiles(this SizeCategory s) => s switch
+    {
+        SizeCategory.Tiny        => 1,
+        SizeCategory.Small       => 1,
+        SizeCategory.Medium      => 1,
+        SizeCategory.MediumLarge => 1,
+        SizeCategory.Large       => 2,
+        SizeCategory.Huge        => 3,
+        _ => throw new ArgumentOutOfRangeException(nameof(s)),
+    };
+
+    /// <summary>Carrying-capacity multiplier per equipment.md (Small ½×, Large 2×).</summary>
+    public static float CarryCapacityMult(this SizeCategory s) => s switch
+    {
+        SizeCategory.Tiny        => 0.25f,
+        SizeCategory.Small       => 0.5f,
+        SizeCategory.Medium      => 1.0f,
+        SizeCategory.MediumLarge => 1.0f,  // Medium frame, Large for grappling
+        SizeCategory.Large       => 2.0f,
+        SizeCategory.Huge        => 4.0f,
+        _ => throw new ArgumentOutOfRangeException(nameof(s)),
+    };
+
+    /// <summary>Parses a snake_case JSON value (e.g. "medium_large") into a SizeCategory.</summary>
+    public static SizeCategory FromJson(string? raw) => raw switch
+    {
+        "tiny"          => SizeCategory.Tiny,
+        "small"         => SizeCategory.Small,
+        "medium"        => SizeCategory.Medium,
+        "medium_large"  => SizeCategory.MediumLarge,
+        "large"         => SizeCategory.Large,
+        "huge"          => SizeCategory.Huge,
+        _ => throw new ArgumentException($"Unknown size category: '{raw}'"),
+    };
+}