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

public class PlayerController : MonoBehaviour
{
    public float walkSpeed;
    private float speed;
    private Vector3 movement;
    private CharacterController controller;

    private int clickCount = 0;
    public float runSpeed;

    private Vector3 moveDir = Vector3.zero;
    private float gravity = 3f;

    public float jumpPower;
    public AudioClip jumpSound;
    private AudioSource audioS;

    // ★追加（足音）
    public AudioClip footSound;
    private float runStep = 0.7f;
    private float stepInterval = 10f;
    private float stepCycle;
    private float nextStep;
    private bool isWalking = true; // スタート時は歩くモード

    void Start()
    {
        audioS = GetComponent<AudioSource>();
        controller = GetComponent<CharacterController>();

        speed = walkSpeed;
    }

    void Update()
    {
        PlayerMove();
    }

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

        Vector3 desiredMove = Camera.main.transform.forward * movement.z + Camera.main.transform.right * movement.x;
        moveDir.x = desiredMove.x * 3f;
        moveDir.z = desiredMove.z * 3f;
        moveDir.y -= gravity * Time.deltaTime;

        controller.Move(moveDir * Time.deltaTime * speed);

        if (Input.GetKeyDown(KeyCode.W))
        {
            clickCount += 1;

            Invoke("ResetCount", 0.3f);
        }

        if (Input.GetKeyUp(KeyCode.W))
        {
            speed = walkSpeed;

            // ★追加（足音）
            isWalking = true; // 歩くモードに戻す
        }

        if (controller.isGrounded)
        {
            moveDir.y = 0;

            if (Input.GetKeyDown(KeyCode.Space))
            {
                moveDir.y = jumpPower;
                audioS.clip = jumpSound;
                audioS.Play();
            }
        }

        // ★追加（足音）
        StepSound();
    }

    void ResetCount()
    {
        if (clickCount != 2)
        {
            clickCount = 0;
            return;
        }
        else
        {
            clickCount = 0;

            speed = runSpeed;

            // ★追加（足音）
            isWalking = false; // 走るモードに変更
        }
    }

    // ★追加（足音）
    void StepSound()
    {
        // ジャンプ中は足音を発生させない。
        if (!controller.isGrounded)
        {
            return;
        }

        if (controller.velocity.sqrMagnitude > 0 && (movement.x != 0 || movement.z != 0))
        {
            // 三項演算子（テクニック）
            stepCycle += (controller.velocity.magnitude + (speed * (isWalking ? 1f : runStep))) * Time.deltaTime;
        }

        if (stepCycle < nextStep)
        {
            return;
        }

        // 足音の発生間隔・・・＞歩く時は間隔が長い。走る時は短い。
        nextStep = stepCycle + stepInterval;

        audioS.clip = footSound;
        audioS.PlayOneShot(audioS.clip);
    }
}