using UnityEngine;

namespace ProjectM.Client
{
    /// <summary>
    /// Live-tunable knobs for the client-only DECALS slice (Phase 1.5b bundle 2: explosion scorch pool, cover
    /// damage cracks, room-arena scars). A static bridge (mirrors <see cref="WorldFeelConfig"/> / <see cref="FeelConfig"/>)
    /// so values can be poked at runtime via MCP <c>execute_code</c> without a recompile
    /// (e.g. <c>ProjectM.Client.DecalConfig.ScorchColor = ...;</c>). Read ONLY by the decal presentation systems
    /// (<see cref="ScorchDecalSystem"/>, <see cref="CoverDamageSystem"/>) and <see cref="RoomDressingSystem"/> — all
    /// managed, main-thread. NEVER read from a [BurstCompile] system (managed-static + Color-in-Burst hazards).
    /// <see cref="ResetDefaults"/> re-stamps on play-enter via [RuntimeInitializeOnLoadMethod] because statics survive
    /// fast-enter-playmode reloads (else a poked value leaks across play-enters).
    /// </summary>
    public static class DecalConfig
    {
        /// <summary>Master gate for every decal (scorch pool + cover cracks + room scars).</summary>
        public static bool Enabled;

        // ---- explosion scorch pool (ScorchDecalSystem) ----
        /// <summary>Scorch disc radius as a multiple of the explosion radius passed to RequestScorch.</summary>
        public static float ScorchRadiusMul;
        /// <summary>Seconds a fresh scorch holds at full strength before it starts fading.</summary>
        public static float ScorchHoldSec;
        /// <summary>Seconds a scorch fades from full to gone (then returns to the pool).</summary>
        public static float ScorchFadeSec;
        /// <summary>Peak scorch tint (dark char); the alpha is the peak opacity it fades from.</summary>
        public static Color ScorchColor;
        /// <summary>Max live scorch decals; the oldest is recycled past this.</summary>
        public static int ScorchPoolCap;

        // ---- cover damage cracks (CoverDamageSystem) ----
        /// <summary>Crack-decal tint (dark).</summary>
        public static Color CoverCrackColor;
        /// <summary>Max crack decals accreted around one cover rock as it is carved to 0.</summary>
        public static int CoverCrackMaxCount;
        /// <summary>Drop a small ground scorch/debris mark where a cover rock shattered.</summary>
        public static bool CoverShatterScorch;

        // ---- room-arena scars (RoomDressingSystem) ----
        /// <summary>Persistent crack/scorch detail decals laid at the room arena centre (0 = off).</summary>
        public static int RoomArenaDecalCount;
        /// <summary>Room-arena scar tint (dark, subtle).</summary>
        public static Color RoomDecalColor;

        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
        public static void ResetDefaults()
        {
            Enabled = true;

            // scorch pool — slightly inside the blast radius so it reads as the burn, not the danger ring
            ScorchRadiusMul = 0.85f;
            ScorchHoldSec = 4f;
            ScorchFadeSec = 6f;
            ScorchColor = new Color(0.05f, 0.04f, 0.03f, 0.85f); // near-black char, mostly opaque at peak
            ScorchPoolCap = 24;

            // cover cracks
            CoverCrackColor = new Color(0.06f, 0.05f, 0.05f, 0.8f);
            CoverCrackMaxCount = 3;
            CoverShatterScorch = true;

            // room-arena scars
            RoomArenaDecalCount = 3;
            RoomDecalColor = new Color(0.08f, 0.07f, 0.06f, 0.5f); // subtle
        }
    }
}