using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;
using Sirenix.OdinInspector;

/// <summary>
/// 主要用于控制教程场景下，相机的阶段性移动
/// </summary>
public class CameraControllerInStart : UnitySingleton<CameraControllerInStart>
{
    public enum State{None, Walk, Jump, Speed, Break, Statr}
    [FoldoutGroup("信息显示")][Title("此时处于状态")][EnumPaging]
    public State state = State.Walk;
    [FoldoutGroup("基本参数")][Title("相机在阶段间运动需要的时间")]
    public float cameraMoveDuration;
    
    /// <summary>
    /// 阶段，包含本阶段的所有信息
    /// </summary>
    public struct Step{
        /// <summary>
        /// 本阶段的名字
        /// </summary>
        public State name;
        
        /// <summary>
        /// 本阶段下，相机应该在哪个位置
        /// </summary>
        public Vector3 pos;
    }

    private class StepListener : MonoBehaviour
    {
        public Step step;
        private void OnTriggerEnter2D(Collider2D other) {
            if(other.TryGetComponent<Person>(out var person)){
                //当检测到人进入，并且此时相机正处于本状态，触发相机的移动到下一个Step
                if(CameraControllerInStart.Instance.state == step.name && person.state == Person.PersonState.Normal){
                    CameraControllerInStart.Instance.MoveToTheStep(step.name);
                }
            }
        }
    }

    private Step[] steps;
    private void Start() {
        //初始化5个阶段的信息
        steps = new Step[5];
        //遍历子物体，根据名称初始化Step信息
        for (int i = 0; i < transform.childCount; i++) {
            Transform child = transform.GetChild(i);
            child.gameObject.AddComponent<StepListener>();
            if (child.name == "Walk") {
                steps[0].name = State.Walk;
                steps[0].pos = child.position;
                child.GetComponent<StepListener>().step = steps[0];
            }
            else if (child.name == "Jump") {
                steps[1].name = State.Jump;
                steps[1].pos = child.position;
                child.GetComponent<StepListener>().step = steps[1];
            }
            else if (child.name == "Speed") {
                steps[2].name = State.Speed;
                steps[2].pos = child.position;
                child.GetComponent<StepListener>().step = steps[2];
            }
            else if (child.name == "Break") {
                steps[3].name = State.Break;
                steps[3].pos = child.position;
                child.GetComponent<StepListener>().step = steps[3];
            }
            else if (child.name == "Start") {
                steps[4].name = State.Statr;
                steps[4].pos = child.position;
                child.GetComponent<StepListener>().step = steps[4];
            }
        }
    }




    /// <summary>
    /// 相机运动到指定阶段的位置
    /// </summary>
    /// <param name="state">下一个阶段</param>
    public void MoveToTheStep(State state){
        Step step = State2Step(state);
        Camera.main.transform.DOMoveX(step.pos.x + 44.5f, cameraMoveDuration);
        this.state = ++step.name;
    }

    private Step State2Step(State state){
        switch (state) {
            case State.Walk:
                return steps[0];
            case State.Jump:
                return steps[1];
            case State.Speed:
                return steps[2];
            case State.Break:
                return steps[3];
            case State.Statr:
                return steps[4];
            default:
                return steps[0];
        }
    }

}