/**
 * @file ConfigServer.h
 * @brief WiFi/Bluetooth Configuration Server
 * 
 * Provides WebSocket-based configuration interface over WiFi or Bluetooth.
 * Allows reading/writing CVs, testing outputs, and monitoring decoder status.
 */

#ifndef CONFIG_SERVER_H
#define CONFIG_SERVER_H

#include <Arduino.h>
#include <WiFi.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <ArduinoJson.h>
#include "CVManager.h"

class ConfigServer {
public:
    ConfigServer(CVManager& cvManager);
    
    /**
     * @brief Initialize configuration server
     * @param ssid WiFi SSID (nullptr for AP mode with default name)
     * @param password WiFi password
     * @param useAP true for AP mode, false for station mode
     * @return true if successful
     */
    bool begin(const char* ssid = nullptr, const char* password = nullptr, bool useAP = true);
    
    /**
     * @brief Stop configuration server
     */
    void stop();
    
    /**
     * @brief Check if configuration mode is active
     */
    bool isActive() const { return active; }
    
    /**
     * @brief Update server (call from loop)
     */
    void update();
    
    /**
     * @brief Set decoder status callback
     * Function signature: void callback(JsonObject& status)
     */
    typedef void (*StatusCallback)(JsonObject& status);
    void setStatusCallback(StatusCallback callback);

private:
    CVManager& cvMgr;
    AsyncWebServer* server;
    AsyncWebSocket* ws;
    bool active;
    
    StatusCallback statusCallback;
    unsigned long lastStatusUpdate;
    
    void setupWebSocket();
    void setupHTTPRoutes();
    void handleWebSocketMessage(void* arg, uint8_t* data, size_t len);
    void handleWebSocketEvent(AsyncWebSocket* server, AsyncWebSocketClient* client,
                              AwsEventType type, void* arg, uint8_t* data, size_t len);
    
    void handleReadCV(AsyncWebSocketClient* client, JsonObject& json);
    void handleWriteCV(AsyncWebSocketClient* client, JsonObject& json);
    void handleGetStatus(AsyncWebSocketClient* client);
    void handleTestOutput(AsyncWebSocketClient* client, JsonObject& json);
    void handleReset(AsyncWebSocketClient* client);
    
    void sendResponse(AsyncWebSocketClient* client, const char* type, 
                     bool success, const char* message = nullptr);
    void broadcastStatus();
    
    String getDefaultAPName();
};

#endif // CONFIG_SERVER_H