// dbc_parser.h - DBC File Parser for CAN Database

#ifndef DBC_PARSER_H
#define DBC_PARSER_H

#include <Arduino.h>

// Maximum number of messages and signals
#define MAX_DBC_MESSAGES  100
#define MAX_DBC_SIGNALS   500

// Signal structure
struct DbcSignal {
  char name[32];
  uint32_t startBit;
  uint32_t length;
  bool isLittleEndian;
  bool isSigned;
  float factor;
  float offset;
  float min;
  float max;
  char unit[8];
  uint32_t messageId;
};

// Message structure
struct DbcMessage {
  uint32_t id;
  char name[32];
  uint8_t dlc;
  uint16_t signalCount;
  uint16_t signalStartIndex;
};

// DBC database
struct DbcDatabase {
  DbcMessage messages[MAX_DBC_MESSAGES];
  DbcSignal signals[MAX_DBC_SIGNALS];
  uint16_t messageCount;
  uint16_t signalCount;
  bool loaded;
};

extern DbcDatabase dbcDB;

// Parse DBC file content
bool parseDBC(const char* content);

// Get message by ID
DbcMessage* getMessageById(uint32_t id);

// Get signal from message by name
DbcSignal* getSignalByName(DbcMessage* msg, const char* name);

// Get all signals for a message
uint16_t getSignalsForMessage(uint32_t msgId, DbcSignal** signals);

// Extract signal value from raw CAN data
float extractSignalValue(const uint8_t* data, const DbcSignal* signal);

// Clear database
void clearDBC();

// Load DBC from SD card
bool loadDBCFromSD(const char* filename);

// Save parsed DBC info to JSON for web
void getDBCSummary(char* buffer, size_t bufferSize);

#endif // DBC_PARSER_H