using UnityEditor;
using UnityEditor.Animations;
using UnityEngine;

namespace ProjectM.EditorTools
{
    /// <summary>
    /// MC-4 — builds the player's MELEE SWING clip + adds the IsAttacking param + MeleeSwing state to AC_PlayerTopDown.
    /// The swing clip is built FROM the full idle pose (every bone keyed) + a Root YAW twist on top. A clip that keys
    /// ONLY the Root makes Rukhanka collapse every un-keyed bone (Hips/Spine/legs) to identity for the state's
    /// duration -> the body sinks into the floor; writeDefaultValues does NOT prevent it (2026-06-11 fix). Basing on
    /// idle leaves nothing un-keyed; the Root yaw is a vertical-axis (height-preserving) twist that reads as a
    /// horizontal slash, paired with the CombatFeedbackSystem slash-arc VFX. PlayerAnimationDriveSystem drives
    /// IsAttacking from MeleeCombo. Idempotent / re-runnable (menu: ProjectM/Animation).
    /// </summary>
    public static class PlayerRigTools
    {
        const string SwingClip = "Assets/_Project/Animation/PlayerMeleeSwing.anim";
        const string PlayerController = "Assets/_Project/Animation/AC_PlayerTopDown.controller";

        [MenuItem("ProjectM/Animation/Player - Build Melee Swing")]
        public static void BuildPlayerMeleeSwing()
        {
            var ac = AssetDatabase.LoadAssetAtPath<AnimatorController>(PlayerController);
            if (ac == null) { Debug.LogError($"[PlayerRigTools] Controller missing: {PlayerController}"); return; }

            var idle = FindIdleClip(ac);
            if (idle == null) { Debug.LogError("[PlayerRigTools] No Idle-state clip to base the swing on."); return; }

            // Full idle pose (every bone keyed) + a Root yaw twist. See the class summary for why a Root-only clip sinks.
            var clip = AssetDatabase.LoadAssetAtPath<AnimationClip>(SwingClip);
            if (clip == null) { clip = new AnimationClip { frameRate = 30f }; AssetDatabase.CreateAsset(clip, SwingClip); }
            var yaw = new AnimationCurve(
                new Keyframe(0f, 0f), new Keyframe(0.06f, -25f), new Keyframe(0.16f, 48f), new Keyframe(0.30f, 0f));
            AnimRigUtil.BuildRootYawOverlayClip(clip, idle, yaw);

            if (!AnimRigUtil.HasParam(ac, "IsAttacking"))
                ac.AddParameter("IsAttacking", AnimatorControllerParameterType.Bool);

            var sm = ac.layers[0].stateMachine;
            var swing = FindState(sm, "MeleeSwing");
            if (swing == null)
            {
                swing = sm.AddState("MeleeSwing");
                swing.writeDefaultValues = false;

                var toSwing = sm.AddAnyStateTransition(swing);
                toSwing.hasExitTime = false;
                toSwing.duration = 0.05f;
                toSwing.canTransitionToSelf = false;
                toSwing.AddCondition(AnimatorConditionMode.If, 0f, "IsAttacking");

                var fromSwing = swing.AddExitTransition();
                fromSwing.hasExitTime = false;
                fromSwing.duration = 0.10f;
                fromSwing.AddCondition(AnimatorConditionMode.IfNot, 0f, "IsAttacking");
            }
            swing.motion = clip;

            EditorUtility.SetDirty(ac);
            AssetDatabase.SaveAssets();
            Debug.Log("[PlayerRigTools] AC_PlayerTopDown: IsAttacking + idle-based MeleeSwing built (no un-keyed-bone collapse).");
        }

        /// <summary>LANTERN P5 (realignment): swap the Bathynaut suit body onto Player.prefab IN PLACE (GUID
        /// preserved — the subscene PlayerSpawner refs never break). Mirrors the proven EnemyRigTools.BuildOne
        /// recipe: strip the old Synty-soldier skeleton + SMR children (every ROOT component — ghost/authoring/
        /// CC/Animator/RigDefinitionAuthoring — stays), flatten the suit body's skeleton + SMRs under the player
        /// root, keep the feet-on-ground Root offset, re-slot the deformation material, and adopt the clone's
        /// avatar (same shared humanoid Characters avatar — AC_PlayerTopDown's muscle clips retarget). Both
        /// frames share this visual until per-frame player models land. Idempotent / re-runnable.</summary>
        [MenuItem("ProjectM/Animation/Player - Build Bathynaut Player (LANTERN)")]
        public static void BuildBathynautPlayer()
        {
            const string synty = "Assets/Synty/PolygonSciFiSpace/Prefabs/Characters/SM_Chr_SpaceSoldier_HelmetArmor_Male_01.prefab";
            const string matPath = "Assets/_Project/Materials/M_SuitFrame_Bathynaut_Animated.mat";
            const string output = "Assets/_Project/Prefabs/Player.prefab";
            const float rootY = -0.90f; // the player's existing feet-on-ground offset (entity origin = capsule center)

            var syntyAsset = AssetDatabase.LoadAssetAtPath<GameObject>(synty);
            var mat = AssetDatabase.LoadAssetAtPath<Material>(matPath);
            if (syntyAsset == null) { Debug.LogError($"[PlayerRigTools] Suit body prefab missing: {synty}"); return; }
            if (mat == null) { Debug.LogError($"[PlayerRigTools] Deformation material missing: {matPath}"); return; }

            var root = PrefabUtility.LoadPrefabContents(output);
            try
            {
                // Strip ONLY the old visual (skeleton + SMR children); root components stay untouched.
                var kids = new System.Collections.Generic.List<Transform>();
                foreach (Transform c in root.transform) kids.Add(c);
                foreach (var c in kids) Object.DestroyImmediate(c.gameObject);

                // Clone the suit body (unlinked) and flatten its skeleton + SMRs under the player root.
                var clone = (GameObject)Object.Instantiate(syntyAsset);
                var srcAnimator = clone.GetComponentInChildren<Animator>();
                var avatar = srcAnimator != null ? srcAnimator.avatar : null;
                var children = new System.Collections.Generic.List<Transform>();
                foreach (Transform c in clone.transform) children.Add(c);
                foreach (var c in children) c.SetParent(root.transform, false); // keep local transforms
                Object.DestroyImmediate(clone);

                // Feet-on-ground: offset the un-keyed Root bone.
                var rootBone = root.transform.Find("Root");
                if (rootBone != null) { var lp = rootBone.localPosition; lp.y = rootY; rootBone.localPosition = lp; }
                else Debug.LogWarning("[PlayerRigTools] No 'Root' bone after the swap; feet offset skipped.");

                // Deformation material on every SMR slot (else unskinned-static under Entities Graphics).
                foreach (var smr in root.GetComponentsInChildren<SkinnedMeshRenderer>(true))
                {
                    var mats = smr.sharedMaterials;
                    for (int i = 0; i < mats.Length; i++) mats[i] = mat;
                    smr.sharedMaterials = mats;
                }

                var anim = root.GetComponent<Animator>();
                if (anim != null && avatar != null) anim.avatar = avatar; // controller (AC_PlayerTopDown) stays

                PrefabUtility.SaveAsPrefabAsset(root, output);
                Debug.Log("[PlayerRigTools] Bathynaut suit body swapped onto Player.prefab (in place).");
            }
            finally
            {
                PrefabUtility.UnloadPrefabContents(root);
            }
            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();
        }


        static AnimationClip FindIdleClip(AnimatorController ac)
        {
            foreach (var c in ac.layers[0].stateMachine.states)
                if (c.state.name == "Idle") return c.state.motion as AnimationClip;
            return null;
        }

        static AnimatorState FindState(AnimatorStateMachine sm, string name)
        {
            foreach (var c in sm.states) if (c.state.name == name) return c.state;
            return null;
        }
    }
}