using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Animations;
using Saltosion.OneWeapon.Guns;
using Saltosion.OneWeapon.Utils;
using Saltosion.OneWeapon.Effects;

namespace Saltosion.OneWeapon.Environment {
    [RequireComponent(typeof(Explodable))]
    public class GunDropper : MonoBehaviour {

        [Header("General")]
        public float GunLaunchForceMultiplier = 1;
        public Transform HoleTransform;
        public Explodable Explodable;
        public bool ExplodeOnEmpty = false;

        [Header("Gunstuff")]
        public int GunsLeft = 3;
        public List<GameObject> PossibleGuns = new List<GameObject>();

        [Header("Graphics (optional)")]
        public SpriteChanger SpriteChanger;

        [Header("Debug")]
        public bool DebugExpelGun = false;

        void Start() {
            if (SpriteChanger != null) {
                GunsLeft = Mathf.Clamp(GunsLeft, 0, SpriteChanger.Sprites.Count - 1);
                SpriteChanger.SetSprite(GunsLeft);
            }
        }

        void Update() {
            if (DebugExpelGun) {
                ExpelGun();
                DebugExpelGun = false;
            }
        }

        public void ExpelGun() {
            GameObject Gun = PossibleGuns[Util.RandomValueBetween(0, PossibleGuns.Count - 1)];
            GameObject ShotGun = GameObject.Instantiate(Gun, HoleTransform.position, new Quaternion());
            Rigidbody2D Body = ShotGun.GetComponent<Rigidbody2D>();
            if (Body == null) {
                Debug.LogError("Shotted Gun has no RigidBody2D!");
            } else {
                Vector2 DownwardForce = new Vector2(0, -1) * (Random.value + 0.2f) * GunLaunchForceMultiplier;
                Vector2 SidewaysForce = new Vector2(1, 0) * (Random.value * 0.4f - 0.2f) * GunLaunchForceMultiplier;
                Body.AddForce(DownwardForce + SidewaysForce, ForceMode2D.Impulse);
            }
            GunsLeft -= 1;
            if (SpriteChanger != null) {
                SpriteChanger.SetSprite(GunsLeft);
            }
            if (GunsLeft == 0) {
                if (ExplodeOnEmpty) {
                    Explodable.Explode(true);
                } else {
                    Destroy(this);
                }
            }
        }
    }
}