using UnityEngine;

/// <summary>
/// Editor上でCameraをキーボード操作するためのコンポーネント
/// </summary>
public class EditorCamera : MonoBehaviour
{
    const float Angle = 30f;
    const float Speed = 0.25f;

    bool IsShift { get { return Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift); } }
    bool shouldRotateLeft { get { return !IsShift && (Input.GetKeyDown(KeyCode.LeftArrow) || Input.GetKeyDown(KeyCode.A)); } }
    bool shouldRotateRight { get { return !IsShift && (Input.GetKeyDown(KeyCode.RightArrow) || Input.GetKeyDown(KeyCode.D)); } }
    bool shouldMoveforwad { get { return !IsShift && (Input.GetKeyDown(KeyCode.UpArrow) || Input.GetKeyDown(KeyCode.W)); } }
    bool shouldMoveBack { get { return !IsShift && (Input.GetKeyDown(KeyCode.DownArrow) || Input.GetKeyDown(KeyCode.S)); } }
    bool shouldMoveLeft { get { return IsShift && (Input.GetKeyDown(KeyCode.LeftArrow) || Input.GetKeyDown(KeyCode.A)); } }
    bool shouldMoveRight { get { return IsShift && (Input.GetKeyDown(KeyCode.RightArrow) || Input.GetKeyDown(KeyCode.D)); } }
    bool shouldMoveUp { get { return IsShift && (Input.GetKeyDown(KeyCode.UpArrow) || Input.GetKeyDown(KeyCode.W)); } }
    bool shouldMoveDown { get { return IsShift && (Input.GetKeyDown(KeyCode.DownArrow) || Input.GetKeyDown(KeyCode.S)); } }

    void Update()
    {
        // [←|A]キーで左回転
        if (shouldRotateLeft) { transform.Rotate(0, -Angle, 0); }
        // [→|D]キーで右回転
        if (shouldRotateRight) { transform.Rotate(0, Angle, 0); }
        // [↑|W]キーで前方移動
        if (shouldMoveforwad) { transform.position += transform.forward.normalized * Speed; }
        // [↓|S]キーで後方移動
        if (shouldMoveBack) { transform.position -= transform.forward.normalized * Speed; }
        // [Shift+(←|A)]キーで左方移動
        if (shouldMoveLeft) { transform.position -= transform.right.normalized * Speed; }
        // [Shift+(→|D)]キーで右方移動
        if (shouldMoveRight) { transform.position += transform.right.normalized * Speed; }
        // [Shift+(↑|W)]キーで上方移動
        if (shouldMoveUp) { transform.position += transform.up.normalized * Speed; }
        // [Shift+(↓|S)]キーで下方移動
        if (shouldMoveDown) { transform.position -= transform.up.normalized * Speed; }
    }
}