using System.Text;
using ProjectM.Simulation;
using UnityEditor;
using UnityEditor.Animations;
using UnityEngine;

namespace ProjectM.EditorTools
{
    /// <summary>
    /// 07-20 data-driven tuning: derive the melee timing TRUTH from the assets themselves instead of hand-copied
    /// constants — clip WindUp lengths / wired state speeds → the real per-step contact seconds/ticks, compared
    /// against what MeleeTiming + the MeleeContactTicks knob actually produce; the coupling invariants the design
    /// review flagged as un-clamped (contact &lt; recover, contact ≤ CastFacingTicks); cadence/DPS math; and the
    /// weapon-vs-cone reach-honesty ratio measured off the BAKED weapon mesh. Run after any clip re-speed,
    /// wire-tool re-run, or knob-default change — drift shows up here before it shows up as jank.
    /// </summary>
    public static class TuningAuditTools
    {
        const string Controller = "Assets/_Project/Animation/AC_PlayerTopDown.controller";
        const string PackDir = "Assets/Synty/AnimationSwordCombat/Animations/Polygon/";
        const string WeaponMesh = "Assets/_Project/Art/Models/Rebased_SM_Wep_Melee.asset";

        [MenuItem("ProjectM/Tuning/Audit Melee Timing + Reach")]
        public static void AuditMeleeTimingMenu() => AuditMeleeTiming();

        public static string AuditMeleeTiming()
        {
            var sb = new StringBuilder();
            sb.AppendLine("==== MELEE TUNING AUDIT (derived from assets vs configured) ====");
            var t = TuningConfig.Defaults();
            float contactKnob = t.MeleeContactTicks;
            uint recover = (uint)Mathf.Max(1f, t.MeleeRecoverTicks);
            uint finRecover = (uint)Mathf.Max(1f, Mathf.Round(t.MeleeRecoverTicks * Mathf.Max(1f, t.MeleeFinisherMult)));

            var ac = AssetDatabase.LoadAssetAtPath<AnimatorController>(Controller);
            if (ac == null) { Debug.LogError("[TuningAudit] Controller missing."); return "controller missing"; }
            var sm = ac.layers[0].stateMachine;

            // (state, windup-take fbx, windup clip name, combo step, lock that gates this step's chain)
            var rows = new (string state, string fbx, string clip, byte step, uint stepRecover)[]
            {
                ("Swing1", "Attack/LightCombo01/A_Attack_LightCombo01A_Sword", "A_Attack_LightCombo01A_WindUp_Sword", 1, recover),
                ("Swing2", "Attack/LightCombo01/A_Attack_LightCombo01B_Sword", "A_Attack_LightCombo01B_WindUp_Sword", 2, recover),
                ("Swing3", "Attack/LightCombo01/A_Attack_LightCombo01C_Sword", "A_Attack_LightCombo01C_WindUp_Sword", 3, finRecover),
            };
            bool anyDrift = false;
            foreach (var r in rows)
            {
                AnimatorState st = null;
                foreach (var cs in sm.states) if (cs.state.name == r.state) st = cs.state;
                if (st == null) { sb.AppendLine($"  {r.state}: STATE MISSING"); continue; }
                AnimationClip windup = null;
                foreach (var o in AssetDatabase.LoadAllAssetsAtPath(PackDir + r.fbx + ".fbx"))
                    if (o is AnimationClip c && c.name == r.clip) windup = c;
                if (windup == null) { sb.AppendLine($"  {r.state}: windup take '{r.clip}' MISSING"); continue; }

                float speed = Mathf.Max(0.01f, st.speed);
                float derivedSec = windup.length / speed;                 // the blade lands when the WindUp take ends
                uint derivedTicks = (uint)Mathf.Round(derivedSec * 60f);
                uint configured = MeleeTiming.ContactTicks(r.step, contactKnob);
                bool drift = derivedTicks != configured;
                anyDrift |= drift;
                sb.AppendLine($"  {r.state}: clip windup {windup.length:F3}s @ speed {speed:F2} -> TRUE contact {derivedSec:F3}s = {derivedTicks}t | configured {configured}t {(drift ? "  << DRIFT" : "  OK")}");
                if (configured >= r.stepRecover) sb.AppendLine($"    !! contact {configured}t >= step lock {r.stepRecover}t (flush-at-overwrite will fire it EARLY every chain)");
                if (configured > PlayerAimSystem.CastFacingTicks) sb.AppendLine($"    !! contact {configured}t > CastFacingTicks {PlayerAimSystem.CastFacingTicks} (aim-steer + anim pulse end BEFORE the blade lands)");
            }
            if (anyDrift) sb.AppendLine("  -> DRIFT fix: retune MeleeContactTicks (base = Swing1's true ticks) and/or MeleeTiming's step fractions.");

            // Cadence / DPS at the configured knobs (chain = light, light, finisher).
            float dmg = t.MeleeDamage;
            float chainSec = (2f * recover + finRecover) / 60f;
            float chainDmg = 2f * dmg + dmg * Mathf.Max(1f, t.MeleeFinisherMult);
            sb.AppendLine($"  Cadence: light lock {recover}t ({recover / 60f:F2}s), finisher lock {finRecover}t ({finRecover / 60f:F2}s); full chain {chainSec:F2}s");
            sb.AppendLine($"  DPS: per-light {dmg / (recover / 60f):F1} | full-chain {chainDmg / chainSec:F1} (dmg {dmg}, finisher x{t.MeleeFinisherMult})");
            sb.AppendLine($"  Buffer: {t.MeleeBufferTicks}t window, unlock slack {MeleeTiming.BatchSlackTicks}t (batch-proof)");

            // Reach honesty: the BAKED weapon mesh's max planar radius (rest pose, feet-at-0 space) vs the cone.
            var mesh = AssetDatabase.LoadAssetAtPath<Mesh>(WeaponMesh);
            if (mesh != null)
            {
                float maxR = 0f;
                var verts = mesh.vertices;
                for (int i = 0; i < verts.Length; i++)
                {
                    float rr = new Vector2(verts[i].x, verts[i].z).magnitude;
                    if (rr > maxR) maxR = rr;
                }
                float swingReach = maxR + 0.45f; // rest radius + typical arm extension at full swing (approx)
                float range = t.MeleeRange;
                float finRange = range * Mathf.Max(0.01f, t.MeleeFinisherRangeMult);
                sb.AppendLine($"  Reach: weapon rest radius {maxR:F2}m (~{swingReach:F2}m swept) vs cone {range:F2}m (x{range / swingReach:F2}) | finisher {finRange:F2}m (x{finRange / swingReach:F2})");
                sb.AppendLine($"    honesty budget: keep the ratio <= ~1.25x (guidelines G2; >1.4x reads as the old 'arc lies' complaint)");
            }
            else sb.AppendLine("  Reach: weapon mesh not found (run Attach Melee Weapon first)");

            // 07-21 G6 (review wf_98bf1268): the cone socket (SpecialSlam) lands at ConeContactTicks via
            // ConeContactPending (0 = legacy at-fire). Visual contact estimate ~0.35s (21t) into the slam anim.
            uint coneContact = (uint)Mathf.Max(0f, t.ConeContactTicks);
            sb.AppendLine(coneContact == 0
                ? "  Cone (SpecialSlam): knob 32 = 0 -> LEGACY at-fire damage (~0.35s before the visual contact)"
                : $"  Cone (SpecialSlam): contact {coneContact}t ({coneContact / 60f:F2}s after fire; visual estimate ~21t)");
            if (coneContact > PlayerAimSystem.CastFacingTicks)
                sb.AppendLine($"    !! cone contact {coneContact}t > CastFacingTicks {PlayerAimSystem.CastFacingTicks} (a resting gamepad stick resolves a MOVE-facing slam)");
            Debug.Log(sb.ToString());
            return sb.ToString();
        }
    }
}