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

public class PanelMain : BasePanel
{
    [SerializeField] float[] mIconPosX;
    [SerializeField] Image[] mImgLevelIcons;

    [SerializeField] Button mBtnLast;
    [SerializeField] Button mBtnNext;

    [SerializeField] Button mBtnStart;
    [SerializeField] Button mBtnLevel;

    private List<Image> mLevelIconList = new List<Image>();
    [SerializeField] List<int> mLevelList = new List<int>();

    private int mTotalLevel;
    private const int FOCUS_IDX = 2;

    private void Awake()
    {
        UIUtils.BindBtn(mBtnLast, OnClickLast);
        UIUtils.BindBtn(mBtnNext, OnClickNext);
        UIUtils.BindBtn(mBtnStart, OnClickStart);
        UIUtils.BindBtn(mBtnLevel, OnClickLevel);
    }

    public override void OnOpen()
    {
        base.OnOpen();

        InitLevelIcons();
    }

    private void InitLevelIcons()
    {
        mTotalLevel = GameConfig.Instance.LevelSort.Count;

        int tLevel = 0;
        for (int i = 0; i < mImgLevelIcons.Length; i++)
        {
            tLevel = GetLevelInCircle(-2 + i + PlayerData.Instance.CurrentLevel, mTotalLevel);
            mLevelList.Add(tLevel);

            mImgLevelIcons[i].sprite = ResourceManager.Instance.LoadRes<Sprite>(Const.Path.GetLevelIconBig(GameConfig.Instance.LevelSort[(tLevel - 1) % mTotalLevel]));
            mLevelIconList.Add(mImgLevelIcons[i]);
        }
    }

    private int GetLevelInCircle(int pLevelNum, int pTotalLevel)
    {
        int tFinalLevel = pLevelNum;
        if (tFinalLevel <= 0)
        {
            while (tFinalLevel <= 0)
            {
                tFinalLevel += pTotalLevel;
            }
        }
        else if(tFinalLevel > pTotalLevel)
        {
            tFinalLevel = (tFinalLevel - 1) % pTotalLevel + 1;
        }

        return tFinalLevel;
    }

    private void OnClickLast()
    {
        for (int i = 0; i < mLevelList.Count; i++)
        {
            mLevelList[i] = GetLevelInCircle(mLevelList[i] - 1, mTotalLevel);
        }

        Image tEndImg = mLevelIconList[mLevelIconList.Count - 1];
        for (int i = mLevelIconList.Count - 2; i >= 0; i--)
        {
            int tNextIndex = (i + 1) % mLevelIconList.Count;

            mLevelIconList[tNextIndex] = mLevelIconList[i];
            mLevelIconList[tNextIndex].GetComponent<RectTransform>().anchoredPosition = new Vector2(mIconPosX[tNextIndex], 0);
        }
        mLevelIconList[0] = tEndImg;
        mLevelIconList[0].sprite = ResourceManager.Instance.LoadRes<Sprite>(Const.Path.GetLevelIconBig(GameConfig.Instance.LevelSort[mLevelList[0] - 1]));
        mLevelIconList[0].GetComponent<RectTransform>().anchoredPosition = new Vector2(mIconPosX[0], 0);
    }

    private void OnClickNext()
    {
        for (int i = 0; i < mLevelList.Count; i++)
        {
            mLevelList[i] = GetLevelInCircle(mLevelList[i] + 1, mTotalLevel);
        }

        Image tStartImg = mLevelIconList[0];
        for (int i = 1; i < mLevelIconList.Count; i++)
        {
            int tLastIndex = (i - 1) % mLevelIconList.Count;

            mLevelIconList[tLastIndex] = mLevelIconList[i];
            mLevelIconList[tLastIndex].GetComponent<RectTransform>().anchoredPosition = new Vector2(mIconPosX[tLastIndex], 0);
        }
        mLevelIconList[mLevelIconList.Count - 1] = tStartImg;
        mLevelIconList[mLevelIconList.Count - 1].sprite = ResourceManager.Instance.LoadRes<Sprite>(Const.Path.GetLevelIconBig(GameConfig.Instance.LevelSort[mLevelList[mLevelIconList.Count - 1] - 1]));
        mLevelIconList[mLevelIconList.Count - 1].GetComponent<RectTransform>().anchoredPosition = new Vector2(mIconPosX[mLevelIconList.Count - 1], 0);
    }

    private void OnClickStart()
    {
        PlayerData.Instance.CurrentLevel = mLevelList[FOCUS_IDX];
        GameManager.Instance.LoadGame();
    }

    private void OnClickLevel()
    {
        PanelLevel tUILevel = UIManager.Instance.OpenUI<PanelLevel>();
        tUILevel.Init(false);
    }
}