using Core.Utilities;
using DG.Tweening;
using MoreMountains.NiceVibrations;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

/// <summary>
/// 主界面底部的Tab按钮界，确保动画正确，按钮显示正确。 
/// </summary>
public class BottomMainTab : MonoBehaviour
{
    /// <summary>
    /// 按钮列表.
    /// </summary>
    public List<Button> mainButtonList;

    /// <summary>
    /// 主界面的Panel列表
    /// </summary>
    public List<Image> panelList;

    /// <summary>
    /// 选中Tab的背景.
    /// </summary>
    public Image selectBtnBg;

    /// <summary>
    /// 主界面视图:
    /// </summary>
    public PageView mainPageView;

    /// <summary>
    /// 当前正在选择的按钮.
    /// </summary>
    protected Button currentSelectBtn;
    /// <summary>
    /// 选择按钮在队列内的索引.
    /// </summary>
    protected int selectIdx = 2;

    /// <summary>
    /// 几个关键的位置信息
    /// </summary>
    protected float defaultBtnWidth = 120.0f;
    protected float selectBgWidth = 240.0f;
    protected float halfScreenWidth = 360.0f;

    protected Timer pageViewAdjTimer;


    // Start is called before the first frame update
    void Start()
    {
        this.onButtonSelected(2);
    }


    /// <summary>
    /// 点击按钮，触发对应的震动数据
    /// </summary>
    public void onTouchButton()
    {
        MMVibrationManager.Haptic(HapticTypes.Success);
    }

    public void onClickShop()
    {
        onButtonSelected(0);
    }
    public void onClickHero()
    {
        onButtonSelected(1);
    }
    public void onClickCombat()
    {
        onButtonSelected(2);
    }
    public void onClickActivity()
    {
        onButtonSelected(3);
    }
    public void onClickGuild()
    {
        onButtonSelected(4);
    }

    /// <summary>
    /// 某一个索引的按钮被选中.
    /// </summary>
    /// <param name="idx"></param>
    protected void onButtonSelected( int idx)
    {
        selectIdx = idx;
        // 调整主Tab按钮的位置信息.
        onButtonSelectAdjPos(idx);
        // 调整每一个Tab按钮的显示信息.
        for (int ti = 0; ti < mainButtonList.Count; ti++)
        {
            if (ti == selectIdx)
            {
                ButtonSelectDisplay(mainButtonList[ti]);
            }
            else
            {
                ButtonUnselDisplay(mainButtonList[ti]);
            }
        }

        // 调整主Panel数据
        //onMainPanelAdjPos(selectIdx);
        mainPageView.pageTo(selectIdx);
    }

    /// <summary>
    /// 页面切换相关的内容
    /// </summary>
    /// <param name="index"></param>
    public void onPageSwith( int idx )
    {
        selectIdx = idx;
        // 调整主Tab按钮的位置信息.
        onButtonSelectAdjPos(idx);
        // 调整每一个Tab按钮的显示信息.
        for (int ti = 0; ti < mainButtonList.Count; ti++)
        {
            if (ti == selectIdx)
            {
                ButtonSelectDisplay(mainButtonList[ti]);
            }
            else
            {
                ButtonUnselDisplay(mainButtonList[ti]);
            }
        }
    }

    /// <summary>
    /// 调整每一个主Panel的位置信息.
    /// 算法描述： 
    /// 选中的idx Panel的位置是0.
    /// 向前设置每一个Panel.
    /// 向后设置每一个Panel.
    /// </summary>
    /// <param name="idx"></param>
    protected void onMainPanelAdjPos( int idx )
    {
        if ((idx < 0) || (idx >= panelList.Count) ) 
            return;

        RectTransform tr;
        tr = panelList[idx].GetComponent<RectTransform>();
        tr.DOKill();
        tr.DOAnchorPosX(0, 0.4f);

        // 向前设置.
        float xMove = 0;
        for( int ti = idx-1;ti>=0;ti --)
        {
            xMove -= 720;
            tr = panelList[ti].GetComponent<RectTransform>();
            tr.DOKill();
            tr.DOAnchorPosX(xMove, 0.4f);
        }

        // 向后设置.
        xMove = 0;
        for( int ti = idx + 1;ti <panelList.Count;ti ++)
        {
            xMove += 720;
            tr = panelList[ti].GetComponent<RectTransform>();
            tr.DOKill();
            tr.DOAnchorPosX(xMove, 0.4f);
        }

        return;
    }

    /// <summary>
    /// 处理某一个按钮被选中，需要重新设置位置等相关的信息
    /// 算法描述：
    /// 1：先设置所有按钮的位置信息，根据不同被选中的按钮。
    /// 2：再设置选中背景的位置信息.
    /// 3: 设置选中和非选中按钮的显示相关信息。
    /// </summary>
    /// <param name="idx"></param>
    protected void onButtonSelectAdjPos( int idx)
    {
        float posStart = defaultBtnWidth / 2.0f;
        //Vector2 tpos;
        RectTransform tr;

        // 设置选中按钮之前的按钮位置信息.
        for ( int ti = 0;ti<idx;ti ++)
        {
            tr = mainButtonList[ti].GetComponent<RectTransform>();
            if( tr)
            {
                /*
                tpos = tr.anchoredPosition;
                tpos.x = posStart;
                tr.anchoredPosition = tpos;*/
                tr.DOKill();
                tr.DOAnchorPosX(posStart, 0.25f);
            }
            posStart += defaultBtnWidth;
        }

        // 设置选中按钮的位置信息和BackGround的位置信息.
        posStart -= defaultBtnWidth;
        posStart += (defaultBtnWidth / 2.0f);
        posStart += (selectBgWidth / 2.0f);
        tr = mainButtonList[idx].GetComponent<RectTransform>();
        if( tr)
        {
            /*
            tpos = tr.anchoredPosition;
            tpos.x = posStart;
            tr.anchoredPosition = tpos;
            */
            tr.DOKill();
            tr.DOAnchorPosX(posStart, 0.25f);
        }
        tr = selectBtnBg.GetComponent<RectTransform>();
        if (tr)
        {
            tr.DOKill();
            tr.DOAnchorPosX(posStart, 0.25f);
        }
        posStart += (defaultBtnWidth / 2.0f);
        posStart += (selectBgWidth / 2.0f);

        // 设置选中位置按钮之后的位置信息。
        for(int ti = idx + 1;ti<mainButtonList.Count;ti ++)
        {
            tr = mainButtonList[ti].GetComponent<RectTransform>();
            if (tr)
            {
                /*
                tpos = tr.anchoredPosition;
                tpos.x = posStart;
                tr.anchoredPosition = tpos;*/
                tr.DOKill();
                tr.DOAnchorPosX(posStart, 0.25f);
            }
            posStart += defaultBtnWidth;
        }
    }

    protected void ButtonSelectDisplay( Button btn )
    {
        btn.image.color = new Color32(255, 255, 255, 0);

        
        Transform[] father = btn.GetComponentsInChildren<Transform>();
        foreach (var child in father)
        {
            Image timg;
            if ( child.name == "imgBig")
            {
                timg = child.GetComponent<Image>();
                if (timg)
                    timg.color = new Color32(255, 255, 255, 255);
            }
            else
            {
                timg = child.GetComponent<Image>();
                if (timg)
                    timg.color = new Color32(255, 255, 255, 0);
            }
        }
    }

    protected void ButtonUnselDisplay( Button btn)
    {
        Transform[] father = btn.GetComponentsInChildren<Transform>();
        foreach (var child in father)
        {
            Image timg;
            if (child.name == "imgBig")
            {
                timg = child.GetComponent<Image>();
                if (timg)
                    timg.color = new Color32(255, 255, 255, 0);
            }
            else
            {
                timg = child.GetComponent<Image>();
                if (timg)
                    timg.color = new Color32(255, 255, 255, 255);
            }
        }
    }

    // Update is called once per frame
    void Update()
    {
    }
}