using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Saltosion.OneWeapon.Player;
using Saltosion.OneWeapon.Enemies;
using Saltosion.OneWeapon.Effects;
using Saltosion.OneWeapon.Environment;

namespace Saltosion.OneWeapon.Guns {
    [RequireComponent(typeof(Bullet))]
    public class Rocket : MonoBehaviour {

        public Rigidbody2D Body;
        public GameObject Sprite;

        public ParticleSystem Trail;
        public ParticleSystem Explosion;

        [Range(0, 10)]
        public float ExplodeRadius;

        private float DeathTimer = 0;

        private Bullet Bullet;

        void Start() {
            Bullet = GetComponent<Bullet>();

            Vector2 Direction = Bullet.Direction;
            float Rot = Bullet.InitialRotation;

            Body.velocity = Direction * 8;
            Body.rotation = Rot - 90;

            Explosion.Stop();
        }

        void Update() {
            DeathTimer += Time.deltaTime;
            if (DeathTimer > 20) {
                Destroy(gameObject);
            }
        }

        void OnTriggerEnter2D(Collider2D collider) {
            if (collider.GetComponent<PlayerController>() != null) {
                // don't hit the player!
                return;
            }
            Bullet.HasExploded = true;

            Destroy(Sprite);
            Destroy(Body);
            Destroy(GetComponent<CapsuleCollider2D>());
            Explosion.Play();
            Trail.Stop();
            DeathTimer = 19;

            Collider2D[] NearbyColliders = Physics2D.OverlapCircleAll(transform.position, ExplodeRadius);

            foreach (Collider2D curr in NearbyColliders) {
                Vector2 Delta = (curr.transform.position - transform.position);
                Vector2 Dir = Delta.normalized;
                float ScaledDistance = 1 - Mathf.Clamp((Delta.magnitude - (ExplodeRadius / 3)) / (ExplodeRadius - (ExplodeRadius / 3)), 0, 1);
                Bullet.DoDamage(ScaledDistance * 20, ScaledDistance * 2, curr, Dir);
                if (curr.attachedRigidbody != null && curr.attachedRigidbody.bodyType == RigidbodyType2D.Dynamic) {
                    // FIXME: AcceleratedMovement currently overrides Rigidbody.velocity so this doesn't do anything
                    curr.attachedRigidbody.AddForce(Dir * 10f, ForceMode2D.Impulse);
                }
            }

            // Do damage here, kill everyone

        }

        private void OnDrawGizmosSelected() {
            Gizmos.color = new Color(1.0f, 0.2f, 0.2f, 0.8f);
            Gizmos.DrawWireSphere(transform.position, ExplodeRadius);
        }
    }
}