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

public class PrepController : MonoBehaviour
{
    public Transform cam;
    public AudioSource source;
    public GameObject markerPrefab;
    public GameObject flashIndicator;
    public Sprite playIcon;
    public Sprite pauseIcon;
    public Button playBtn;
    public Button pinBtn;
    public Button removePinBtn;
    public Toggle followSeekerToggle;
    public TMP_Text playbackTimeTxt;
    public TMP_Text hitCountTxt;
    public static List<GameObject> markers = new List<GameObject>();

    public static void Reset(){
        markers = new List<GameObject>();
    }

    public static PrepController instance;
    void Awake(){
        playBtn.onClick.AddListener(TogglePlay);
        pinBtn.onClick.AddListener(AddMarker);
        removePinBtn.onClick.AddListener(RemoveMarker);
        instance = this;

        Screen.orientation = ScreenOrientation.LandscapeLeft;
    }
    void Update()
    {
        if(Input.GetKeyDown(KeyCode.RightArrow)){
            AddMarker();
        }
        if(Input.GetKeyDown(KeyCode.LeftArrow)){

            float lastTime=0f;
            for(int i=0; i < markers.Count; i++){
                if(markers[i].GetComponent<Marker>().myTime < source.time){
                    lastTime = markers[i].GetComponent<Marker>().myTime;
                }else{
                    break;
                }
            }
            Vector3 newCamPos = new Vector3(lastTime * AudioAnalyzer.instance.zoomingYMult, cam.position.y, cam.position.z);
            if(source.isPlaying){
                TogglePlay();
                cam.position = newCamPos;
                TogglePlay();
            }else{
                cam.position = newCamPos;
            }

            if(Input.GetKey(KeyCode.RightShift)){
                RemoveMarker();
            }
        
        }
        hitCountTxt.text = markers.Count.ToString();
        playbackTimeTxt.text = source.time.ToString("n3");

        if(followSeekerToggle.isOn){
            if(source.isPlaying){        
                cam.position = new Vector3(source.time * AudioAnalyzer.instance.zoomingYMult, cam.position.y, cam.position.z);
                source.time = startOffset + (Time.time - startTime);
            }else{
                source.time = cam.position.x / AudioAnalyzer.instance.zoomingYMult;
            }
        }
        bool anythingInProximity = false;
        for(int i=0; i < transform.childCount; i++){
            if(Mathf.Abs(transform.GetChild(i).position.x - source.time) < 0.1f){
                anythingInProximity = true;
                break;
            }
        }

        flashIndicator.SetActive(anythingInProximity);
    }

    float startTime;
    float startOffset;
    public void TogglePlay(){
        if(source.isPlaying){
            source.Pause();
            playBtn.GetComponent<Image>().sprite = playIcon;
        }else{
            source.time = cam.position.x / AudioAnalyzer.instance.zoomingYMult;
            source.Play();
            playBtn.GetComponent<Image>().sprite = pauseIcon;
            startTime = Time.time;
            startOffset = source.time;
        }
    }


    
    public void SetMarkers(List<float> times){
        foreach(GameObject go in markers){
            Destroy(go);
        }

        markers = new List<GameObject>();

        foreach(float time in times){
            AddMarker(time);
        }
    }

    public void AddMarker(){
        GameObject go = Instantiate(markerPrefab, transform);
        // go.transform.position = new Vector3(cam.position.x, 0);
        go.GetComponent<Marker>().myTime = cam.position.x / AudioAnalyzer.instance.zoomingYMult;


        markers.Add(go);
    }

    public void AddMarker(float time){
        GameObject go = Instantiate(markerPrefab, transform);
        // go.transform.position = new Vector3(time, 0);
        go.GetComponent<Marker>().myTime = time;
        markers.Add(go);
    }

    public void RemoveMarker(){
        if(markers.Count <= 0){ return; }

        GameObject closestOne = markers[0];
        foreach(GameObject marker in markers){
            float diff = Mathf.Abs(marker.transform.position.x - cam.position.x);
            float closestDiff = Mathf.Abs(closestOne.transform.position.x - cam.position.x);
            if(diff < closestDiff){
                closestOne = marker;
            }
        }

        int indexToRemove = 0;
        for(int i =0; i < markers.Count; i++){
            if(markers[i] == closestOne){
                indexToRemove = i;
            }
        }
        markers.RemoveAt(indexToRemove);
        Destroy(closestOne);
    }


    public void OnSeekerDragged(Vector3 newCamPos){
        if(source.isPlaying){
            TogglePlay();
        }
    }
    

    bool playAfterDragEnd = false;
    public void OnSeekerDown(){
        playAfterDragEnd=source.isPlaying;
    }

    public void OnSeekerUp(){
        if(playAfterDragEnd){
            TogglePlay();
        }
    }
}