using UnityEngine;
using UnityEngine.Tilemaps;

namespace Platformer.Mechanics
{
    /// <summary>
    /// 게임 시작 시 프레임·렌더·물리 영역 기본 최적화 + One-Way Platform 자동 적용.
    /// PD 지시 2026-05-07 — 스크롤 버벅임 보완 + 점프·이동 시 지형 통과(One-Way Platform).
    /// </summary>
    public static class GameOptimizer
    {
        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
        static void Init()
        {
            Application.targetFrameRate = 60;
            QualitySettings.vSyncCount = 0;
            Time.fixedDeltaTime = 1f / 60f;

            // BT5-Dev #34 — Layer Matrix 영역 = Player(13) ↔ Enemy(14)만 OFF. JumpThrough Layer 8 영역 폐기.
            // OneWay = PlatformEffector2D 영역 표준 패턴 활용 (Layer Matrix 폐기)
            Physics2D.IgnoreLayerCollision(13, 14, true);
            Debug.Log($"[BT34-LayerSep] Player(13) ↔ Enemy(14) collision OFF (Layer 8 영역 폐기·PlatformEffector2D 영역 활용)");
        }

        /// <summary>
        /// BT5-Dev #27 — PD 제안: Layer 8(JumpThrough) + Raycast 동적 충돌.
        /// PlatformEffector2D 폐기. 모든 일반 BoxCollider2D를 Layer 8로 변환 → 기본 통과 + Player 발 Raycast 시점만 충돌 활성.
        /// 제외: Tilemap·Player·Enemy·DeathZone·VictoryZone·TokenInstance·AttackHitbox·Trigger Collider.
        /// </summary>
        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
        static void SetupJumpThroughPlatforms()
        {
            // BT5-Dev #34 — Unity 표준 OneWay Platform = PlatformEffector2D + useOneWay + surfaceArc 180.
            // 모든 일반 Collider(Tilemap 포함) PlatformEffector2D 적용. Layer 영역 무관 (기본 Layer 0 유지).
            // 동작: 위에서 떨어지면 충돌(착지) / 옆·아래·점프 상승 시 통과
            int applied = 0, excluded = 0;
            var allColliders = Object.FindObjectsByType<Collider2D>(FindObjectsSortMode.None);
            var appliedNames = new System.Collections.Generic.List<string>();
            foreach (var c in allColliders)
            {
                if (c == null) continue;
                if (c.isTrigger) { excluded++; continue; }
                if (c.GetComponent<PlayerController>() != null
                    || c.GetComponent<EnemyController>() != null
                    || c.GetComponent<DeathZone>() != null
                    || c.GetComponent<TokenInstance>() != null
                    || c.GetComponent<VictoryZone>() != null
                    || c.GetComponent<AttackHitbox>() != null)
                {
                    excluded++;
                    continue;
                }

                if (c.gameObject.layer == 8) c.gameObject.layer = 0;

                // BT5-Dev #35 — TilemapCollider2D 영역 표준 패턴 (CompositeCollider2D + Rigidbody2D Static + PlatformEffector2D)
                var tilemapCollider = c.GetComponent<UnityEngine.Tilemaps.TilemapCollider2D>();
                if (tilemapCollider != null)
                {
                    tilemapCollider.compositeOperation = Collider2D.CompositeOperation.Merge;
                    var composite = c.GetComponent<CompositeCollider2D>();
                    if (composite == null) composite = c.gameObject.AddComponent<CompositeCollider2D>();
                    var rb = c.GetComponent<Rigidbody2D>();
                    if (rb == null) rb = c.gameObject.AddComponent<Rigidbody2D>();
                    rb.bodyType = RigidbodyType2D.Static;
                    composite.usedByEffector = true;
                    var compositeEffector = c.GetComponent<PlatformEffector2D>();
                    if (compositeEffector == null) compositeEffector = c.gameObject.AddComponent<PlatformEffector2D>();
                    compositeEffector.useOneWay = true;
                    compositeEffector.surfaceArc = 180f;
                    compositeEffector.rotationalOffset = 0f;
                    compositeEffector.useSideFriction = false;
                    compositeEffector.useSideBounce = false;
                    applied++;
                    if (appliedNames.Count < 8) appliedNames.Add($"{c.gameObject.name}(Tilemap+Composite)");
                    continue;
                }

                // 일반 Collider — PlatformEffector2D 직접 적용
                c.usedByEffector = true;
                var effector = c.GetComponent<PlatformEffector2D>();
                if (effector == null) effector = c.gameObject.AddComponent<PlatformEffector2D>();
                effector.useOneWay = true;
                effector.surfaceArc = 180f;
                effector.rotationalOffset = 0f;
                effector.useSideFriction = false;
                effector.useSideBounce = false;
                applied++;
                if (appliedNames.Count < 8) appliedNames.Add($"{c.gameObject.name}({c.GetType().Name})");
            }
            Debug.Log($"[BT35-OneWay] applied={applied} excluded={excluded} total={allColliders.Length}");
            Debug.Log($"[BT35-OneWay] appliedSamples=[{string.Join(", ", appliedNames)}]");
        }
    }
}