//+------------------------------------------------------------------+
//|                                               firebase-users.mq5 |
//|                                 Copyright 2025, Obunadike Chioma |
//|                                    https://devbidden.netlify.app |
//+------------------------------------------------------------------+
#property copyright "Copyright 2025, Obunadike Chioma"
#property link      "https://devbidden.netlify.app"
#property version   "1.00"
//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
//---
// get_data();
//add_data();
delete_entry("2iLvaaPJEsbSSxzdqfPO");
   update_entry("NoQ8m2vYLnGkykNhUjFE");
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
//---
  }
//+------------------------------------------------------------------+
void get_data()
  {
// 1. Construct Firestore URL
   string url = "https://firestore.googleapis.com/v1/projects/my-users-mql5/databases/(default)/documents/users/";
// 2. Prepare headers
   string headers;
   headers += "Content-Type: application/json\r\n";
// 3. Send request
   char data[], result[];
   int timeout = 5000;
   int status = WebRequest("GET", url, headers, timeout, data, result, headers);
// 4. Handle response
   if(status == 200)
     {
      // Print("Firestore Data Received:");
      int filehandle = FileOpen("firebase-temp.txt", FILE_WRITE | FILE_BIN);
      if(filehandle != INVALID_HANDLE)
        {
         //--- Saving the contents of the result[] array to a file
         FileWriteArray(filehandle, result, 0, ArraySize(result));
         //--- Closing the file
         FileFlush(filehandle);
         FileClose(filehandle);
        }
      else
         Print("Error in FileOpen. Error code =", GetLastError());
     }
   else
     {
      Print("Error Code: ", status);
      Print("Response: ", CharArrayToString(result));
     }
  }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void add_data()
  {
   string url = "https://firestore.googleapis.com/v1/projects/my-users-mql5/databases/(default)/documents/users";
   string jsonData = "{\"fields\":{\"Name\":{\"stringValue\":\"Jane Doe\"}}}";
   uchar postData[], result[];
   StringToCharArray(jsonData, postData, 0, StringLen(jsonData), CP_UTF8);
   string header;
   int res = WebRequest("POST", url, "Content-Type: application/json\r\n", 5000, postData, result, header);
   if(res == 200)
     {
      Print("Success: ", CharArrayToString(result));
     }
   else
     {
      Print("Error ", res, ": ", CharArrayToString(result));
     }
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void delete_entry(string documentId)
  {
   string apiKey = "YOUR_API_KEY"; // Replace with your Firebase API key
   string url = "https://firestore.googleapis.com/v1/projects/my-users-mql5" +
                "/databases/(default)/documents/users/" + documentId;
   uchar result[];
   uchar postData[]; // Empty payload for DELETE
   string headers = "Content-Type: application/json\r\n";
   string responseHeaders; // To store response headers (unused here)
// Correct WebRequest overload:
   int res = WebRequest(
                "DELETE",       // HTTP method
                url,            // Full URL with document ID
                headers,        // Request headers
                5000,           // Timeout (5 seconds)
                postData,       // Empty payload (uchar array, not NULL)
                result,         // Response data
                responseHeaders // Response headers (ignored)
             );
   if(res == 200)
     {
      Print("Document deleted");
     }
   else
     {
      Print("Error ", res, ": ", CharArrayToString(result));
     }
  }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void update_entry(string doc_id)
  {
   string url = "https://firestore.googleapis.com/v1/projects/my-users-mql5/databases/(default)/documents/users/" + doc_id;
   string jsonData = "{\"fields\":{\"exampleField\":{\"stringValue\":\"Princess Doe\"}}}";
   uchar postData[], result[];
   StringToCharArray(jsonData, postData, 0, StringLen(jsonData), CP_UTF8);
   string header;
   int res = WebRequest("PATCH", url, "Content-Type: application/json\r\n", 5000, postData, result, header);
   if(res == 200)
     {
      Print("Success: ", CharArrayToString(result));
     }
   else
     {
      Print("Error ", res, ": ", CharArrayToString(result));
     }
  }
//+------------------------------------------------------------------+