using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering.Universal;

public class AblaufKleinerStern6 : MonoBehaviour
{
    public GameObject kleinerStern;
    public GameObject grosserStern;
    public GameObject grosserSternLicht;
    public GameObject hirt1;
    public GameObject hirt2;

    private Action nextStep;
    private class Task {
        private Action action;
        private float time;
        
        public Task(Action action, float time){
            this.action = action;
            this.time = time;
        }

        public bool isDue(){
            return Time.time >= time;
        }

        public void Do(){
            action();
        }
    }
    private List<Task> taskList;
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        taskList = new();
        nextStep = KleinerSternWachtAuf;
        grosserStern.transform.position = new(targetGrosserStern - distanceHirten, 3.14f);
        hirt1.transform.position = new(targetHirt1 - distanceHirten, -2.08f);
        hirt2.transform.position = new(targetHirt2 - distanceHirten, -2.31f);
        kleinerStern.GetComponent<Light2D>().intensity = 0;
        grosserSternLicht.GetComponent<Light2D>().intensity = 0;
    }

    // Update is called once per frame
    void Update()
    {
        List<Task> newlist = new();
        foreach (Task t in taskList){
            if (t.isDue()){
                t.Do();
            } else {
                newlist.Add(t);
            }
        }
        taskList = newlist;
        if (Input.GetKeyDown(KeyCode.Space) && taskList.Count == 0){
            nextStep();
        }
    }

    private void scheduleNewTask(float timeFromNow, Action action){
        Task t = new(action, Time.time + timeFromNow);
        taskList.Add(t);
    }

    private const float targetHirt1 = -3.46f;
    private const float targetHirt2 = -6.68f;
    private const float targetGrosserStern = -0.37f;
    private const float distanceHirten = 12;

    private void KleinerSternWachtAuf(){
        kleinerStern.GetComponent<Lichtsteuerung>().FadeToIntensity(1, 2);
        nextStep = HirtenKommen;
    }

    private void HirtenKommen(){
        grosserSternLicht.GetComponent<Lichtsteuerung>().FadeToIntensity(1, 7);
        scheduleNewTask(4, delegate(){
            hirt1.GetComponent<FigurMitBeinenBewegung>().GoToXPosition(targetHirt1);
            hirt2.GetComponent<FigurMitBeinenBewegung>().GoToXPosition(targetHirt2);
            grosserStern.GetComponent<SternBewegung>().GoToPositionWithVelocity(new(targetGrosserStern, 3.14f), 1);
        });
        nextStep = Ende;
    }

    private void Ende(){
        grosserSternLicht.GetComponent<Lichtsteuerung>().FadeToIntensity(0, 2.5f);
        kleinerStern.GetComponent<Lichtsteuerung>().FadeToIntensity(0, 2.5f);
        nextStep = delegate(){};
    }
}