using UnityEngine;
using UnityEngine.InputSystem;
using Unity.Netcode;
using Colosseum.Skills;

namespace Colosseum.Player
{
    /// <summary>
    /// 플레이어 스킬 입력 처리.
    /// 논타겟 방식: 입력 시 즉시 스킬 시전
    /// </summary>
    public class PlayerSkillInput : NetworkBehaviour
    {
        [Header("Skill Slots")]
        [Tooltip("각 슬롯에 등록할 스킬 데이터 (6개)")]
        [SerializeField] private SkillData[] skillSlots = new SkillData[6];

        [Header("References")]
        [Tooltip("SkillController (없으면 자동 검색)")]
        [SerializeField] private SkillController skillController;
        [Tooltip("PlayerNetworkController (없으면 자동 검색)")]
        [SerializeField] private PlayerNetworkController networkController;

        private InputSystem_Actions inputActions;

        public SkillData[] SkillSlots => skillSlots;

        public override void OnNetworkSpawn()
        {
            if (!IsOwner)
            {
                enabled = false;
                return;
            }

            // SkillController 참조 확인
            if (skillController == null)
            {
                skillController = GetComponent<SkillController>();
                if (skillController == null)
                {
                    Debug.LogError("PlayerSkillInput: SkillController not found!");
                    enabled = false;
                    return;
                }
            }

            // PlayerNetworkController 참조 확인
            if (networkController == null)
            {
                networkController = GetComponent<PlayerNetworkController>();
            }

            InitializeInputActions();
        }

        private void InitializeInputActions()
        {
            inputActions = new InputSystem_Actions();
            inputActions.Player.Enable();

            // 스킬 액션 콜백 등록
            inputActions.Player.Skill1.performed += _ => OnSkillInput(0);
            inputActions.Player.Skill2.performed += _ => OnSkillInput(1);
            inputActions.Player.Skill3.performed += _ => OnSkillInput(2);
            inputActions.Player.Skill4.performed += _ => OnSkillInput(3);
            inputActions.Player.Skill5.performed += _ => OnSkillInput(4);
            inputActions.Player.Skill6.performed += _ => OnSkillInput(5);
        }

        public override void OnNetworkDespawn()
        {
            if (inputActions != null)
            {
                inputActions.Player.Skill1.performed -= _ => OnSkillInput(0);
                inputActions.Player.Skill2.performed -= _ => OnSkillInput(1);
                inputActions.Player.Skill3.performed -= _ => OnSkillInput(2);
                inputActions.Player.Skill4.performed -= _ => OnSkillInput(3);
                inputActions.Player.Skill5.performed -= _ => OnSkillInput(4);
                inputActions.Player.Skill6.performed -= _ => OnSkillInput(5);
                inputActions.Disable();
            }
        }

        /// <summary>
        /// 스킬 입력 처리
        /// </summary>
        private void OnSkillInput(int slotIndex)
        {
            if (slotIndex < 0 || slotIndex >= skillSlots.Length)
                return;

            SkillData skill = skillSlots[slotIndex];
            if (skill == null)
            {
                Debug.Log($"Skill slot {slotIndex + 1} is empty");
                return;
            }

            // 마나 비용 체크
            if (networkController != null && networkController.Mana < skill.ManaCost)
            {
                Debug.Log($"Not enough mana for skill: {skill.SkillName} (Required: {skill.ManaCost}, Current: {networkController.Mana})");
                return;
            }

            // 논타겟: 타겟 없이 스킬 시전
            bool success = skillController.ExecuteSkill(skill);
            if (!success)
            {
                Debug.Log($"Cannot execute skill: {skill.SkillName}");
                return;
            }

            // 스킬 성공 시 마나 소모
            if (networkController != null && skill.ManaCost > 0)
            {
                networkController.UseManaRpc(skill.ManaCost);
            }
        }

        /// <summary>
        /// 스킬 슬롯 접근자
        /// </summary>
        public SkillData GetSkill(int slotIndex)
        {
            if (slotIndex < 0 || slotIndex >= skillSlots.Length)
                return null;
            return skillSlots[slotIndex];
        }

        /// <summary>
        /// 스킬 슬롯 변경
        /// </summary>
        public void SetSkill(int slotIndex, SkillData skill)
        {
            if (slotIndex < 0 || slotIndex >= skillSlots.Length)
                return;

            skillSlots[slotIndex] = skill;
        }

        /// <summary>
        /// 남은 쿨타임 조회
        /// </summary>
        public float GetRemainingCooldown(int slotIndex)
        {
            SkillData skill = GetSkill(slotIndex);
            if (skill == null) return 0f;

            return skillController.GetRemainingCooldown(skill);
        }

        /// <summary>
        /// 스킬 사용 가능 여부
        /// </summary>
        public bool CanUseSkill(int slotIndex)
        {
            SkillData skill = GetSkill(slotIndex);
            if (skill == null) return false;

            return !skillController.IsOnCooldown(skill) && !skillController.IsExecutingSkill;
        }
    }
}