using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ExitGames.Client.Photon;
using Photon.Pun;
using Photon.Realtime;
using TMPro;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.SceneManagement;

public class GameManager : MonoBehaviourPunCallbacks, IOnEventCallback
{
    const int START_WAIT_TIME = 10;

    const byte GAME_START_CODE = 1;

    const byte GAME_OVER_CODE = 2;  

    DateTime startedTime = DateTime.UnixEpoch;
    public bool gameStarted => startedTime != DateTime.UnixEpoch;
    RaiseEventOptions raiseEventOptions = new RaiseEventOptions { Receivers = ReceiverGroup.All };

    public SnakeController p1;
    public SnakeController p2;
    public GameObject wonScreen;
    public GameObject lostScreen;
    public TMP_Text mp_status_txt;
    public TMP_Text scoreTxtYou,scoreTxtEnemy;
    public GameObject fruitPrefab;
    public List<GameObject> spawnedFruits = new List<GameObject>();
    public int maxFruits = 10;
    public float fruitSpawnInterval = 5f;

    float fruitSpawnTimer = 0;

    void Awake(){
        p1.gameObject.SetActive(false);
        p2.gameObject.SetActive(false);
    }
    
    
    void Start()
    {
        scoreTxtEnemy.text = scoreTxtYou.text = "-";
        if(!PhotonNetwork.IsConnectedAndReady){
            SceneManager.LoadScene(0);
        }

        spawnedFruits= new List<GameObject>();
    }

    float startTimer = START_WAIT_TIME;
    void Update()
    {
        if (!gameStarted)
        {
            if(Input.GetKeyDown(KeyCode.P)){
                StartGame();
            }

            WaitForGameStart();
            return;
        }
        TimeSpan timeSince = DateTime.Now - startedTime;            
        mp_status_txt.text = timeSince.Minutes + ":" + timeSince.Seconds.ToString("00");

        UpdateScores();

        if (PhotonNetwork.IsMasterClient)
        {
            p1.gameObject.SetActive(true);
            p2.gameObject.SetActive(false);

            SpawnFruits();

        }
        else
        {
            p1.gameObject.SetActive(false);
            p2.gameObject.SetActive(true);
        }

    }

    void UpdateScores(){
        scoreTxtYou.text = getPlayerScore(PhotonNetwork.LocalPlayer).ToString();
        scoreTxtEnemy.text = getPlayerScore(PhotonNetwork.PlayerListOthers.FirstOrDefault()).ToString();
    }

    void SpawnFruits(){

        if(spawnedFruits.Count > maxFruits){return;}
        if(spawnedFruits.Count <4){
            //spawn 2
        }else{
            if(fruitSpawnTimer >0){
                fruitSpawnTimer-=Time.deltaTime;
                return;
            }
        }
        fruitSpawnTimer = fruitSpawnInterval;

        spawnedFruits.Add(PhotonNetwork.Instantiate(fruitPrefab.name, GetRandomPoint(),Quaternion.identity));
    }

    void WaitForGameStart()
    {
        if (PhotonNetwork.CurrentRoom.PlayerCount >= 2)
        {
            if (startTimer > 0)
            {
                startTimer -= Time.deltaTime;
                mp_status_txt.text = $"Starting game in {startTimer.ToString("n0")} Seconds";
            }
            else
            {
                if (PhotonNetwork.IsMasterClient)
                {
                    StartGame();
                }
            }
        }
        else
        {
            startTimer = START_WAIT_TIME;
            mp_status_txt.text = "Waiting for an opponent";
        }
    }

    int getPlayerScore(Player p){
        return p.CustomProperties.ContainsKey("score") ? (int)p.CustomProperties["score"] : 0;
    }

    Vector2 GetRandomPoint(){
        SnakeController p = (p1.gameObject.activeSelf) ? p1 : p2;

        float x = p.transform.position.x - (int)(UnityEngine.Random.Range(-p.fieldSize.x/2f, p.fieldSize.x/2f));
        float y = p.transform.position.y - (int)(UnityEngine.Random.Range(-p.fieldSize.y/2f, p.fieldSize.y/2f));
        
        return new Vector2(x, y);
    }

    void StartGame(){
        Debug.Log("Sending Raise Event");
        PhotonNetwork.RaiseEvent(GAME_START_CODE, 1, raiseEventOptions, SendOptions.SendReliable);
        startedTime = DateTime.Now;
    }

    public void DestroyFruit(Vector2 position){
        if(PhotonNetwork.IsMasterClient){
            destroyFruit(position);
        }else{
            photonView.RPC("RpcDestroyFruit", RpcTarget.All, position);
        }
    }

    [PunRPC]
    void RpcDestroyFruit(Vector2 position){
        if(PhotonNetwork.IsMasterClient){
            destroyFruit(position);
        }
    }

    void destroyFruit(Vector2 position){
        // Fruit[] fruits = FindObjectsOfType<Fruit>();
        foreach(GameObject fruit in spawnedFruits){
            if((Vector2)fruit.transform.position == position){
                spawnedFruits.Remove(fruit);
                PhotonNetwork.Destroy(fruit.gameObject);
                break;
            }
        }
    }


    public void OnGameOver(){
        PhotonNetwork.RaiseEvent(GAME_OVER_CODE, PhotonNetwork.IsMasterClient ? 0 : 1, raiseEventOptions, SendOptions.SendReliable);
    }

    bool gameOver = false;
    int winnerId = -1;
    public void OnEvent(EventData photonEvent)
    {
        if (photonEvent.Code == GAME_START_CODE)
        {
            Debug.Log("Game Started");
            startedTime = DateTime.Now;
            
        }else if(photonEvent.Code == GAME_OVER_CODE){
            Debug.Log("Game Over");
            gameOver = true;
            winnerId = (int)photonEvent.CustomData;
            if(PhotonNetwork.IsMasterClient){
                wonScreen.SetActive(winnerId== 0);
                lostScreen.SetActive(winnerId != 0);
            }else{
                wonScreen.SetActive(winnerId != 0);
                lostScreen.SetActive(winnerId== 0);
            }

            StartCoroutine(SubmitGameData());
        }
    }

    public IEnumerator SubmitGameData()
    {
        // Create the leaderboard object
        Leaderboard leaderboard = new Leaderboard
        {
            master = scoreTxtYou.text,
            client = scoreTxtEnemy.text
        };

        // Create the submission object
        Submission submission = new Submission
        {
            gameAddress = GameData.address,
            playerType = PhotonNetwork.IsMasterClient ? "master" : "client",
            username = GameData.user_id,
            winner = gameOver ? (winnerId == 0 ? "master" : "client") : "",
            leaderboard = leaderboard,
            score = getPlayerScore(PhotonNetwork.LocalPlayer),
            game_id = "snakes",
            publicKey= GameData.pubkey,
            wager = GameData.wager
        };

        // Convert submission to JSON
        string json = JsonUtility.ToJson(submission);
        byte[] jsonData = Encoding.UTF8.GetBytes(json);

        // Send request to the server
        using (UnityWebRequest request = new UnityWebRequest($"{Constants.VALIDATOR_URL}submit", "POST"))
        {
            request.uploadHandler = new UploadHandlerRaw(jsonData);
            request.downloadHandler = new DownloadHandlerBuffer();
            request.SetRequestHeader("Content-Type", "application/json");

            yield return request.SendWebRequest();

#if UNITY_2020_1_OR_NEWER
            if (request.result == UnityWebRequest.Result.Success)
#else
            if (!request.isNetworkError && !request.isHttpError)
#endif
            {
                // Debug.Log("Submission successful");
                // Debug.Log("Response: " + request.downloadHandler.text);
            }
            else
            {
                Debug.Log("Error submitting game data:");
                Debug.Log(request.error);
            }
        }
    }

    public IEnumerator SubmitRefundReq()
    {

        // Send request to the server
        using (UnityWebRequest request = new UnityWebRequest($"{Constants.VALIDATOR_URL}requestRefund?gameAddress=" + GameData.address, "GET"))
        {
            request.SetRequestHeader("Content-Type", "application/json");

            yield return request.SendWebRequest();

#if UNITY_2020_1_OR_NEWER
            if (request.result == UnityWebRequest.Result.Success)
#else
            if (!request.isNetworkError && !request.isHttpError)
#endif
            {
                Debug.Log("Refund request submitted successfully");
                JSBridge.instance.OnClose(-1);
            }
            else
            {
                Debug.Log("Error submitting refund request:");
                Debug.Log(request.error);
            }
        }
    }

}