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

using UnityEngine.UI;

public class NPC : MonoBehaviour
{
    /// <summary>
    /// 凝视目标
    /// </summary>
    public Transform AimTarget;

    /// <summary>
    /// 虚拟目标
    /// </summary>
    public Transform VirtualTarget;

    /// <summary>
    /// 骨骼Neck
    /// </summary>
    public Transform NeckTra;

    /// <summary>
    /// 对话内容
    /// </summary>
    public List<string> msg = new List<string>();

    /// <summary>
    /// 初始位置
    /// </summary>
    Vector3 oriPos;

    /// <summary>
    /// 自身肖像
    /// </summary>
    public Sprite myPortrait;

    private Button mark;
    private Text text;
    private Button dialogBox;
    private Image portrait;

    int index = 1;

    public Vector3 neck;

    /// <summary>
    /// 视线跟随
    /// </summary>
    public bool LineOfSightFollowing;
    private void Start()
    {
        if (LineOfSightFollowing)
            oriPos = VirtualTarget.position;

        mark = transform.Find("MarkCanvas/mark").GetComponent<Button>();

        text = transform.parent.Find("NPCCanvas/dialogBox/Text").GetComponent<Text>();
        dialogBox = transform.parent.Find("NPCCanvas/dialogBox").GetComponent<Button>();
        portrait = transform.parent.Find("NPCCanvas/dialogBox/portrait").GetComponent<Image>();

        mark.onClick.AddListener(() =>
        {
            dialogBox.gameObject.SetActive(true);
            mark.gameObject.SetActive(false);
            portrait.sprite = myPortrait;

            int co = UnityEngine.Random.Range(0, msg.Count);
            text.text = msg[co];

            dialogBox.onClick.AddListener(() =>
            {
                mark.gameObject.SetActive(true);
                dialogBox.gameObject.SetActive(false);
                dialogBox.onClick.RemoveAllListeners();

                //if (index == msg.Count)
                //{
                //    mark.gameObject.SetActive(true);
                //    dialogBox.gameObject.SetActive(false);
                //    dialogBox.onClick.RemoveAllListeners();
                //    index = 1;
                //}
                //else
                //{
                //    text.text = msg[index];
                //    index++;
                //}
            });
        });
        mark.gameObject.SetActive(false);
        //dialogBox.onClick.AddListener(() =>
        //{

        //    if (index == msg.Count)
        //    {
        //        mark.gameObject.SetActive(true);
        //        dialogBox.gameObject.SetActive(false);
        //    }
        //    else
        //    {
        //        text.text = msg[index];
        //        index++;
        //    }
        //});
    }

    public float Limit = 45;
    private void FixedUpdate()
    {
        if (LineOfSightFollowing)
        {
            neck = NeckTra.localEulerAngles;
            if (neck.y > 180)
            {
                if (neck.y - 360 <= -Limit)
                    AimTarget = null;
            }
            else
            {
                if (neck.y >= Limit)
                    AimTarget = null;
            }

            if (AimTarget != null)
            {
                VirtualTarget.position = Vector3.Lerp(VirtualTarget.position, AimTarget.position, 0.05f);
            }
            else
            {
                VirtualTarget.position = Vector3.Lerp(VirtualTarget.position, oriPos, 0.1f);
            }
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.transform.CompareTag("Player"))
        {
            AimTarget = other.transform.Find("AimTarget");
        }
        if (mark != null) mark.gameObject.SetActive(true);
    }

    private void OnTriggerExit(Collider other)
    {
        if (other.transform.CompareTag("Player"))
        {
            AimTarget = null;
        }
        if (mark != null) mark.gameObject.SetActive(false);
        if (dialogBox != null) dialogBox.gameObject.SetActive(false);
    }
}