using System;
using System.Collections;
using System.IO;
using UnityEngine;
using UnityEngine.Networking;

public class AvatarDataUploader : MonoBehaviour
{
    [Header("Server Configuration")]
    [SerializeField] private string serverHost = "127.0.0.1";
    [SerializeField] private int serverPort = 8080;
    [SerializeField] private string uploadAsPlayer = "player1"; // Upload as which player
    
    [Header("Upload Configuration")]
    [SerializeField] private bool autoUpload = true;
    [SerializeField] private float uploadInterval = 0.1f; // How often to upload data (in seconds)
    [SerializeField] private string localDataFile = "avatar_sync_data.json"; // Local file to upload
    
    [Header("Debug")]
    [SerializeField] private bool enableDebugMode = false;
    [SerializeField] private bool showConnectionStatus = true;
    
    private string syncFilesPath;
    private Coroutine uploadCoroutine;
    private bool isConnected = false;
    private float lastSuccessfulUpload = 0f;
    private int totalUploads = 0;
    private int successfulUploads = 0;
    
    // Connection status
    public bool IsConnected => isConnected;
    public string ServerUrl => $"http://{serverHost}:{serverPort}";
    public float LastUploadTime => lastSuccessfulUpload;
    public float SuccessRate => totalUploads > 0 ? (float)successfulUploads / totalUploads : 0f;
    
    void Start()
    {
        // Set up file paths
        syncFilesPath = Path.Combine(Application.dataPath, "Sync-Files");
        if (!Directory.Exists(syncFilesPath))
        {
            Directory.CreateDirectory(syncFilesPath);
        }
        
        Debug.Log($"Avatar Data Uploader initialized");
        Debug.Log($"Server: {ServerUrl}");
        Debug.Log($"Upload As Player: {uploadAsPlayer}");
        Debug.Log($"Local Data File: {localDataFile}");
        
        // Start uploading if auto-upload is enabled
        if (autoUpload)
        {
            StartUpload();
        }
        
        // Test connection
        StartCoroutine(TestConnection());
    }
    
    void OnValidate()
    {
        // Ensure valid values
        if (uploadInterval < 0.01f)
            uploadInterval = 0.01f;
            
        if (serverPort < 1 || serverPort > 65535)
            serverPort = 8080;
    }
    
    public void StartUpload()
    {
        if (uploadCoroutine == null)
        {
            uploadCoroutine = StartCoroutine(UploadLoop());
            Debug.Log("Avatar upload started");
        }
    }
    
    public void StopUpload()
    {
        if (uploadCoroutine != null)
        {
            StopCoroutine(uploadCoroutine);
            uploadCoroutine = null;
            Debug.Log("Avatar upload stopped");
        }
    }
    
    IEnumerator TestConnection()
    {
        string url = $"{ServerUrl}/status";
        
        using (UnityWebRequest request = UnityWebRequest.Get(url))
        {
            request.timeout = 5; // 5 second timeout for connection test
            
            yield return request.SendWebRequest();
            
            if (request.result == UnityWebRequest.Result.Success)
            {
                isConnected = true;
                if (showConnectionStatus)
                {
                    Debug.Log($"Successfully connected to avatar sync server at {ServerUrl}");
                }
                
                if (enableDebugMode)
                {
                    Debug.Log($"Server status: {request.downloadHandler.text}");
                }
            }
            else
            {
                isConnected = false;
                if (showConnectionStatus)
                {
                    Debug.LogWarning($"Failed to connect to avatar sync server at {ServerUrl}: {request.error}");
                }
            }
        }
    }
    
    IEnumerator UploadLoop()
    {
        while (true)
        {
            yield return StartCoroutine(UploadLocalData());
            yield return new WaitForSeconds(uploadInterval);
        }
    }
    
    IEnumerator UploadLocalData()
    {
        string localFilePath = Path.Combine(syncFilesPath, localDataFile);
        
        if (!File.Exists(localFilePath))
        {
            if (enableDebugMode)
            {
                Debug.LogWarning($"Local data file not found: {localFilePath}");
            }
            yield break;
        }
        
        string jsonData = null;
        
        // Read file outside of try block with yield
        try
        {
            jsonData = File.ReadAllText(localFilePath);
        }
        catch (Exception e)
        {
            Debug.LogError($"Error reading local data file: {e.Message}");
            yield break;
        }
        
        if (string.IsNullOrEmpty(jsonData))
        {
            if (enableDebugMode)
            {
                Debug.LogWarning("Local avatar data is empty, skipping upload");
            }
            yield break;
        }
        
        // Upload to server
        string url = $"{ServerUrl}/{uploadAsPlayer}";
        totalUploads++;
        
        using (UnityWebRequest request = new UnityWebRequest(url, "POST"))
        {
            byte[] jsonBytes = System.Text.Encoding.UTF8.GetBytes(jsonData);
            request.uploadHandler = new UploadHandlerRaw(jsonBytes);
            request.downloadHandler = new DownloadHandlerBuffer();
            request.SetRequestHeader("Content-Type", "application/json");
            request.timeout = 10;
            
            yield return request.SendWebRequest();
            
            if (request.result == UnityWebRequest.Result.Success)
            {
                successfulUploads++;
                lastSuccessfulUpload = Time.time;
                isConnected = true;
                
                if (enableDebugMode)
                {
                    Debug.Log($"Successfully uploaded data as {uploadAsPlayer}");
                }
            }
            else
            {
                isConnected = false;
                if (enableDebugMode)
                {
                    Debug.LogWarning($"Failed to upload data as {uploadAsPlayer}: {request.error}");
                }
            }
        }
    }
    
    // Public methods for runtime control
    public void SetServerAddress(string host, int port)
    {
        serverHost = host;
        serverPort = port;
        
        // Test new connection
        StartCoroutine(TestConnection());
    }
    
    public void SetUploadPlayer(string player)
    {
        uploadAsPlayer = player;
    }
    
    public void ManualUpload()
    {
        if (gameObject.activeInHierarchy)
        {
            StartCoroutine(UploadLocalData());
        }
    }
    
    // Get current stats for UI display
    public string GetUploadStats()
    {
        return $"Connected: {isConnected}\n" +
               $"Success Rate: {(SuccessRate * 100):F1}%\n" +
               $"Total Uploads: {totalUploads}\n" +
               $"Last Upload: {(Time.time - lastSuccessfulUpload):F1}s ago";
    }
    
    void OnDisable()
    {
        StopUpload();
    }
    
    void OnDestroy()
    {
        StopUpload();
    }
    
    // GUI for runtime debugging
    void OnGUI()
    {
        if (!enableDebugMode)
            return;
            
        GUILayout.BeginArea(new Rect(10, 10, 300, 180));
        GUILayout.BeginVertical("box");
        
        GUILayout.Label($"Avatar Uploader - {uploadAsPlayer}");
        GUILayout.Label($"Server: {ServerUrl}");
        GUILayout.Label($"Status: {(isConnected ? "Connected" : "Disconnected")}");
        GUILayout.Label($"Success Rate: {(SuccessRate * 100):F1}%");
        GUILayout.Label($"Last Upload: {(Time.time - lastSuccessfulUpload):F1}s ago");
        
        GUILayout.BeginHorizontal();
        if (GUILayout.Button("Manual Upload"))
        {
            ManualUpload();
        }
        if (GUILayout.Button("Test Connection"))
        {
            StartCoroutine(TestConnection());
        }
        GUILayout.EndHorizontal();
        
        if (uploadCoroutine == null)
        {
            if (GUILayout.Button("Start Auto Upload"))
            {
                StartUpload();
            }
        }
        else
        {
            if (GUILayout.Button("Stop Auto Upload"))
            {
                StopUpload();
            }
        }
        
        GUILayout.EndVertical();
        GUILayout.EndArea();
    }
}