using System;
using System.Collections.Generic;
using UnityEngine;

public class StraightBulletCurve : BulletCurve
{
    private Vector2 start;
    private Vector2 end;

    public StraightBulletCurve(BattleObject caster, SkillConfig skillConfig, BattleEffectPlayer bulletEffect, RectTransform target, List<HB427_tagSCUseSkill.tagSCUseSkillHurt> hurtList, int bulletIndex, Action<int, List<HB427_tagSCUseSkill.tagSCUseSkillHurt>> onHit)
        : base(caster, skillConfig, bulletEffect, target, hurtList, bulletIndex, onHit)
    {

    }

    public override void Reset()
    {
        base.Reset();
        start = WorldToLocalAnchoredPosition(bulletTrans.position) + bulletOffset;
        end = WorldToLocalAnchoredPosition(target.position);
        duration = Vector2.Distance(start, end) / skillConfig.BulletFlySpeed;
        // BattleUtility.MarkStartAndEnd(bulletTrans, target);
    }

    public override void Run()
    {
        if (finished) return;

        if (bulletTrans == null)
        {
            Debug.LogError("BulletTrans is null, cannot run StraightBulletCurve");
        }

        elapsed += Time.deltaTime;
        float t = Mathf.Clamp01(elapsed / duration);
        Vector2 pos = Vector2.Lerp(start, end, t);
        if (null != bulletTrans)
        {
            bulletTrans.anchoredPosition = pos;
            
        }

        Vector2 dir = end - start;
        float angle = Mathf.Atan2(dir.y, dir.x) * Mathf.Rad2Deg + (caster.Camp == BattleCamp.Red ? 0 : 180);
        if (null != bulletTrans)
        {
            bulletTrans.rotation = Quaternion.Euler(0, 0, angle);
        }

        if (t >= 1f)
        {
            finished = true;
            onHit?.Invoke(mBulletIndex, hurts);
        }
    }
}