using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using UnityEngine;

public class SpellVisualEffects : MonoBehaviour
{
    public enum EffectLocation
    {
        SelfLocation,
        TargettedLocation,
        TravelSelfToTarget,
        TravelTargetToSelf,
        AllSide,
        AllSideEachLocation,
        AllRightLocations,
        AllRightCenter,
        AllLeftLocations,
        AllLeftCenter,
        TopOfScreen,
        CenterOfScreen,
        BottomOfScreen
    }


    [Header("Effect Objects")]
    [SerializeField] private GameObject[] effectSequence;
    [SerializeField] private EffectLocation[] effectLocations;
    [SerializeField] private AudioClip[] soundEffects;

    private Transform[][] locationSequence;
    private PositionHandler positionHandler;

    private void Awake()
    {
        positionHandler = PositionHandler.Instance;
    }

    public void GatherLocationSequence(int castingLocation = 0, int targetLocation = 0, bool wasEnemyCast = false, bool isTargettingSameSide = false)
    {
        locationSequence = new Transform[effectLocations.Length][];

        for (int i = 0; i < effectLocations.Length; ++i)
        {
            locationSequence[i] = new Transform[positionHandler.GatherLocationCount((int)effectLocations[i], wasEnemyCast)];
            locationSequence[i] = positionHandler.GatherLocation(effectLocations[i], castingLocation, targetLocation, wasEnemyCast, isTargettingSameSide).ToArray();
        }
    }

    public async Task BeginEffectSequence(bool isEnemyCast)
    {
        for (int i = 0; i < effectSequence.Length; ++i)
            await EffectCompletion(locationSequence[i], effectSequence[i], soundEffects[i], isEnemyCast);

        Destroy(this.gameObject);
    }

    private async Task EffectCompletion(Transform[] spawnArea, GameObject effect, AudioClip soundEffect, bool isEnemyCast)
    {
        GameObject[] instancedEffects = new GameObject[spawnArea.Length];
        for (int i = 0; i < spawnArea.Length; ++i)
        {
            instancedEffects[i] = Instantiate(effect, spawnArea[i]);
            if (instancedEffects[i].TryGetComponent(out Rigidbody2D effectBody))
            {
                if (isEnemyCast)
                {
                    instancedEffects[i].GetComponent<SpriteRenderer>().flipX = true;
                    effectBody.velocity = new Vector2(-4.75f, 0f);
                }
                else
                    effectBody.velocity = new Vector2(4.75f, 0f);
            }
        }

        // All of the effects instanced should be the same length
        SoundManager.Instance.PlaySoundFX(soundEffect);
        float animationDuration = instancedEffects[0].GetComponent<Animator>().GetCurrentAnimatorStateInfo(0).length;
        await Task.Delay((int)(animationDuration * 1000));

        foreach (GameObject garbageObject in instancedEffects)
            Destroy(garbageObject);
    }
}