using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace FPS{

	public enum PlayerState{
		Idle, Walking, Running, Jumping
	}

	[RequireComponent(typeof(CharacterController), typeof(AudioSource))]
	public class PlayerController : MonoBehaviour {

		[Range(0.1f, 2f)]
		public float walkSpeed = 1.5f;
		[Range(0.1f, 10f)]
		public float runSpeed = 3.5f;

		private CharacterController charaController;
		private GameObject FPSCamera;
		private Vector3 moveDir = Vector3.zero;

		[Range(0.1f, 10f)]
		public float gravity = 9.8f;
		[Range(1f, 15f)]
		public float jumpPower = 10f;

		[Range(0.1f, 2f)]
		public float crouchHeight = 1f;
		[Range(0.1f, 5f)]
		public float normalHeight = 2f;

		[HideInInspector]
		public PlayerState currentPlayerState;
		[HideInInspector] 
		public bool isWalking = false;
		[HideInInspector] 
		public bool isRunning = false;
		[HideInInspector] 
		public bool isCrouching = false;

		// ★追加
		public AudioClip walkSound;
		public AudioClip runSound;
		private AudioSource footStepSource;
		[HideInInspector]
		public float footSoundDelay;


		void Start () {
			FPSCamera = GameObject.Find("FPSCamera");
			charaController = GetComponent<CharacterController> ();

			// ★追加
			footStepSource = GetComponent<AudioSource>();
			StartCoroutine(PlayerFootSound());  // コルーチンの起動
		}

		void Update () {
			Move ();
			Crouch();
			PlayerStateManager();
			print(currentPlayerState);
		}

		void Move(){
			float moveH = Input.GetAxis ("Horizontal");
			float moveV = Input.GetAxis ("Vertical");
			Vector3 movement = new Vector3 (moveH, 0, moveV);

			if (movement.sqrMagnitude > 1) {
				movement.Normalize ();
			}

			Vector3 desiredMove = FPSCamera.transform.forward * movement.z + FPSCamera.transform.right * movement.x;
			moveDir.x = desiredMove.x * 5f;
			moveDir.z = desiredMove.z * 5f;

			if (Input.GetKey (KeyCode.LeftShift)) {
				charaController.Move (moveDir * Time.fixedDeltaTime * runSpeed);
				isWalking = false;
				isRunning = true;
			} else {
				charaController.Move (moveDir * Time.fixedDeltaTime * walkSpeed);
				isWalking = true;
				isRunning = false;
			}

			moveDir.y -= gravity * Time.deltaTime;

			if(charaController.isGrounded){
				if(Input.GetKeyDown(KeyCode.Space)){
					moveDir.y = jumpPower;
				}
			}
		}

		void Crouch(){
			if (Input.GetKey (KeyCode.LeftCommand)) {
				charaController.height = crouchHeight;
				isCrouching = true;
			} else {
				charaController.height = normalHeight;
				isCrouching = false;
			}
		}
			
		void PlayerStateManager(){
			if (charaController.isGrounded) {
				if (charaController.velocity.sqrMagnitude < 0.01f) {
					currentPlayerState = PlayerState.Idle;

				} else if (isWalking == true && isRunning == false) {
					currentPlayerState = PlayerState.Walking;

				} else if (charaController.velocity.sqrMagnitude > 0.01f && isWalking == false && isRunning == true) {
					currentPlayerState = PlayerState.Running;
				}
			} else {
				currentPlayerState = PlayerState.Jumping;
			}
		}

		// ★追加
		// 移動時の足音
		public IEnumerator PlayerFootSound(){ // 「IEnumerator」についてネットで調べてみよう！ 
			while(true){
				if (currentPlayerState != PlayerState.Idle) {
					if (currentPlayerState == PlayerState.Walking) {
						footStepSource.PlayOneShot (walkSound, 0.9f);
						footStepSource.pitch = Random.Range (1f, 1.2f);
						footSoundDelay = 1 / walkSpeed;
					}

					if (currentPlayerState == PlayerState.Running) {
						footStepSource.PlayOneShot (runSound, 0.9f);
						footStepSource.pitch = Random.Range (1f, 1.2f);
						footSoundDelay = 1 / runSpeed;
					}
				}

				yield return new WaitForSeconds (footSoundDelay * 2);  // 「WaitForSeconds」について調べてみよう！
			}
		}
	}
}