using UnityEngine;
using System.Collections;

/// キャラクター基底クラス.
/// SpriteRendererが必要.
[RequireComponent (typeof(SpriteRenderer))]
public class Token : MonoBehaviour
{
  /// プレハブ取得.
  /// プレハブは必ず"Resources/Prefabs/"に配置すること.
  public static GameObject GetPrefab (GameObject prefab, string name)
  {
    return prefab ?? (prefab = Resources.Load ("Prefabs/" + name) as GameObject);
  }

  /// インスタンスを生成してスクリプトを返す.
  public static Type CreateInstance<Type> (GameObject prefab, Vector3 p, float direction = 0.0f, float speed = 0.0f) where Type : Token
  {
    GameObject g = Instantiate (prefab, p, Quaternion.identity) as GameObject;
    Type obj = g.GetComponent<Type> ();
    obj.SetVelocity (direction, speed);
    return obj;
  }

  public static Type CreateInstance2<Type> (GameObject prefab, float x, float y, float direction = 0.0f, float speed = 0.0f) where Type : Token
  {
    Vector3 pos = new Vector3 (x, y, 0);
    return CreateInstance<Type> (prefab, pos, direction, speed);
  }

  /// 生存フラグ.
  bool _exists = false;

  public bool Exists {
    get { return _exists; }
    set { _exists = value; }
  }

  /// アクセサ.
  /// レンダラー.
  SpriteRenderer _renderer = null;

  public SpriteRenderer Renderer {
    get { return _renderer ?? (_renderer = gameObject.GetComponent<SpriteRenderer> ()); }
  }

  /// 描画フラグ.
  public bool Visible {
    get { return Renderer.enabled; }
    set { Renderer.enabled = value; }
  }

  /// ソーティングレイヤー名.
  public string SortingLayer {
    get { return Renderer.sortingLayerName; }
    set { Renderer.sortingLayerName = value; }
  }

  /// ソーティング・オーダー.
  public int SortingOrder {
    get { return Renderer.sortingOrder; }
    set { Renderer.sortingOrder = value; }
  }

  /// 座標(X).
  public float X {
    set {
      Vector3 pos = transform.position;
      pos.x = value;
      transform.position = pos;
    }
    get { return transform.position.x; }
  }

  /// 座標(Y).
  public float Y {
    set {
      Vector3 pos = transform.position;
      pos.y = value;
      transform.position = pos;
    }
    get { return transform.position.y; }
  }

  /// 座標を足し込む.
  public void AddPosition (float dx, float dy)
  {
    X += dx;
    Y += dy;
  }

  /// 座標を設定する.
  public void SetPosition (float x, float y)
  {
    Vector3 pos = transform.position;
    pos.Set (x, y, 0);
    transform.position = pos;
  }

  /// スケール値(X).
  public float ScaleX {
    set {
      Vector3 scale = transform.localScale;
      scale.x = value;
      transform.localScale = scale;
    }
    get { return transform.localScale.x; }
  }

  /// スケール値(Y).
  public float ScaleY {
    set {
      Vector3 scale = transform.localScale;
      scale.y = value;
      transform.localScale = scale;
    }
    get { return transform.localScale.y; }
  }

  /// スケール値を設定.
  public void SetScale (float x, float y)
  {
    Vector3 scale = transform.localScale;
    scale.Set (x, y, (x + y) / 2);
    transform.localScale = scale;
  }

  /// スケール値(X/Y).
  public float Scale {
    get {
      Vector3 scale = transform.localScale;
      return (scale.x + scale.y) / 2.0f;
    }
    set {
      Vector3 scale = transform.localScale;
      scale.x = value;
      scale.y = value;
      transform.localScale = scale;
    }
  }

  /// スケール値を足し込む.
  public void AddScale (float d)
  {
    Vector3 scale = transform.localScale;
    scale.x += d;
    scale.y += d;
    transform.localScale = scale;
  }

  /// スケール値をかける.
  public void MulScale (float d)
  {
    transform.localScale *= d;
  }

  /// 剛体.
  Rigidbody2D _rigidbody2D = null;

  public Rigidbody2D RigidBody {
    get { return _rigidbody2D ?? (_rigidbody2D = gameObject.GetComponent<Rigidbody2D> ()); }
  }

  /// 移動量を設定.
  public void SetVelocity (float direction, float speed)
  {
    Vector2 v;
    v.x = Util.CosEx (direction) * speed;
    v.y = Util.SinEx (direction) * speed;
    RigidBody.velocity = v;
  }

  /// 移動量を設定(X/Y).
  public void SetVelocityXY (float vx, float vy)
  {
    Vector2 v;
    v.x = vx;
    v.y = vy;
    RigidBody.velocity = v;
  }

  /// 移動量をかける.
  public void MulVelocity (float d)
  {
    RigidBody.velocity *= d;
  }

  /// 移動量(X).
  public float VX {
    get { return RigidBody.velocity.x; }
    set {
      Vector2 v = RigidBody.velocity;
      v.x = value;
      RigidBody.velocity = v;
    }
  }

  /// 移動量(Y).
  public float VY {
    get { return RigidBody.velocity.y; }
    set {
      Vector2 v = RigidBody.velocity;
      v.y = value;
      RigidBody.velocity = v;
    }
  }

  /// 方向.
  public float Direction {
    get {
      Vector2 v = GetComponent<Rigidbody2D>().velocity;
      return Mathf.Atan2 (v.y, v.x) * Mathf.Rad2Deg;
    }
  }

  /// 速度.
  public float Speed {
    get {
      Vector2 v = GetComponent<Rigidbody2D>().velocity;
      return Mathf.Sqrt (v.x * v.x + v.y * v.y);
    }
  }

  /// 重力.
  public float GravityScale {
    get { return RigidBody.gravityScale; }
    set { RigidBody.gravityScale = value; }
  }

  /// 回転角度.
  public float Angle {
    set { transform.eulerAngles = new Vector3 (0, 0, value); }
    get { return transform.eulerAngles.z; }
  }

  /// スプライトの設定.
  public void SetSprite (Sprite sprite)
  {
    Renderer.sprite = sprite;
  }

  /// 色設定.
  public void SetColor (float r, float g, float b)
  {
    var c = Renderer.color;
    c.r = r;
    c.g = g;
    c.b = b;
    Renderer.color = c;
  }

  /// アルファ値を設定.
  public void SetAlpha (float a)
  {
    var c = Renderer.color;
    c.a = a;
    Renderer.color = c;
  }

  /// アルファ値を取得.
  public float GetAlpha ()
  {
    var c = Renderer.color;
    return c.a;
  }

  /// アルファ値.
  public float Alpha {
    set { SetAlpha (value); }
    get { return GetAlpha (); }
  }

  /// サイズを設定.
  float _width = 0.0f;
  float _height = 0.0f;

  public void SetSize (float width, float height)
  {
    _width = width;
    _height = height;
  }

  /// スプライトの幅.
  public float SpriteWidth {
    get { return Renderer.bounds.size.x; }
  }

  /// スプライトの高さ.
  public float SpriteHeight {
    get { return Renderer.bounds.size.y; }
  }

  /// コリジョン（円）.
  CircleCollider2D _circleCollider = null;

  public CircleCollider2D CircleCollider {
    get { return _circleCollider ?? (_circleCollider = GetComponent<CircleCollider2D> ()); }
  }
  // 円コリジョンの半径.
  public float CollisionRadius {
    get { return CircleCollider.radius; }
    set { CircleCollider.radius = value; }
  }
  // 円コリジョンの有効無効を設定する.
  public bool CircleColliderEnabled {
    get { return CircleCollider.enabled; }
    set { CircleCollider.enabled = value; }
  }

  /// コリジョン（矩形）.
  BoxCollider2D _boxCollider = null;

  public BoxCollider2D BoxCollider {
    get { return _boxCollider ?? (_boxCollider = GetComponent<BoxCollider2D> ()); }
  }

  /// 矩形コリジョンの幅.
  public float BoxColliderWidth {
    get { return BoxCollider.size.x; }
    set {
      var size = BoxCollider.size;
      size.x = value;
      BoxCollider.size = size;
    }
  }

  /// 矩形コリジョンの高さ.
  public float BoxColliderHeight {
    get { return BoxCollider.size.y; }
    set {
      var size = BoxCollider.size;
      size.y = value;
      BoxCollider.size = size;
    }
  }
  // 箱コリジョンのサイズを設定する.
  public void SetBoxColliderSize (float w, float h)
  {
    BoxCollider.size.Set (w, h);
  }
  // 箱コリジョンの有効無効を設定する
  public bool BoxColliderEnabled {
    get { return BoxCollider.enabled; }
    set { BoxCollider.enabled = value; }
  }

  /// 移動して画面内に収めるようにする.
  public void ClampScreenAndMove (Vector2 v)
  {
    Vector2 min = GetWorldMin ();
    Vector2 max = GetWorldMax ();
    Vector2 pos = transform.position;
    pos += v;

    // 画面内に収まるように制限をかける.
    pos.x = Mathf.Clamp (pos.x, min.x, max.x);
    pos.y = Mathf.Clamp (pos.y, min.y, max.y);

    // プレイヤーの座標を反映.
    transform.position = pos;
  }

  /// 画面内に収めるようにする.
  public void ClampScreen ()
  {
    Vector2 min = GetWorldMin ();
    Vector2 max = GetWorldMax ();
    Vector2 pos = transform.position;
    // 画面内に収まるように制限をかける.
    pos.x = Mathf.Clamp (pos.x, min.x, max.x);
    pos.y = Mathf.Clamp (pos.y, min.y, max.y);

    // プレイヤーの座標を反映.
    transform.position = pos;
  }

  /// 画面外に出たかどうか.
  public bool IsOutside ()
  {
    Vector2 min = GetWorldMin ();
    Vector2 max = GetWorldMax ();
    Vector2 pos = transform.position;
    if (pos.x < min.x || pos.y < min.y) {
      return true;
    }
    if (pos.x > max.x || pos.y > max.y) {
      return true;
    }
    return false;
  }

  /// 画面の左下のワールド座標を取得する.
  public Vector2 GetWorldMin (bool noMergin = false)
  {
    Vector2 min = Camera.main.ViewportToWorldPoint (Vector2.zero);
    if (noMergin) {
      // そのまま返す.
      return min;
    }

    // 自身のサイズを考慮する.
    min.x += _width;
    min.y += _height;
    return min;
  }

  /// 画面右上のワールド座標を取得する.
  public Vector2 GetWorldMax (bool noMergin = false)
  {
    Vector2 max = Camera.main.ViewportToWorldPoint (Vector2.one);
    if (noMergin) {
      // そのまま返す.
      return max;
    }

    // 自身のサイズを考慮する.
    max.x -= _width;
    max.y -= _height;
    return max;
  }

  /// 消滅（メモリから削除）.
  public void DestroyObj ()
  {
    Destroy (gameObject);
  }

  /// アクティブにする.
  public virtual void Revive ()
  {
    gameObject.SetActive (true);
    Exists = true;
    Visible = true;
  }

  /// 消滅する（オーバーライド可能）
  /// ただし base.Vanish()を呼ばないと消滅しなくなることに注意
  public virtual void Vanish ()
  {
    VanishCannotOverride();
  }
  /// 消滅する（オーバーライド禁止）
  public void VanishCannotOverride ()
  {
    gameObject.SetActive (false);
    Exists = false;
  }
}