/**
 * Runtime debug configuration system
 * Provides flexible control over debug output without recompilation
 */

#ifndef DEBUG_CONFIG_H
#define DEBUG_CONFIG_H

#include <sys/socket.h>   // struct sockaddr_storage
#include <stddef.h>       // size_t
#include <stdint.h>
#include <stddef.h>
#include <time.h>

#ifdef __cplusplus
extern "C" {
#endif

/* Debug levels */
typedef enum {
    DEBUG_LEVEL_NONE = 0,     // No debug output
    DEBUG_LEVEL_ERROR = 1,    // Errors only
    DEBUG_LEVEL_WARN = 2,     // Warnings and errors
    DEBUG_LEVEL_INFO = 3,     // Info, warnings, errors
    DEBUG_LEVEL_DEBUG = 4,    // Full debug output
    DEBUG_LEVEL_TRACE = 5     // Trace everything
} debug_level_t;

/* Debug categories - can be combined with bitwise OR */
typedef uint64_t debug_category_t;

#define DEBUG_CATEGORY_NONE        ((debug_category_t)0)
#define DEBUG_CATEGORY_UASYNC      ((debug_category_t)1 << 0)   // u_async module
#define DEBUG_CATEGORY_LL_QUEUE    ((debug_category_t)1 << 1)   // ll_queue module
#define DEBUG_CATEGORY_CONNECTION  ((debug_category_t)1 << 2)   // connection module
#define DEBUG_CATEGORY_ETCP        ((debug_category_t)1 << 3)   // etcp module
#define DEBUG_CATEGORY_CRYPTO      ((debug_category_t)1 << 4)   // crypto operations
#define DEBUG_CATEGORY_MEMORY      ((debug_category_t)1 << 5)   // memory management
#define DEBUG_CATEGORY_TIMING      ((debug_category_t)1 << 6)   // timing/performance
#define DEBUG_CATEGORY_CONFIG      ((debug_category_t)1 << 7)   // configuration parsing
#define DEBUG_CATEGORY_TUN         ((debug_category_t)1 << 8)   // TUN interface
#define DEBUG_CATEGORY_ROUTING     ((debug_category_t)1 << 9)   // routing table
#define DEBUG_CATEGORY_TIMERS      ((debug_category_t)1 << 10)  // timer management
#define DEBUG_CATEGORY_NORMALIZER  ((debug_category_t)1 << 11)  // packet normalizer
#define DEBUG_CATEGORY_BGP         ((debug_category_t)1 << 12)  // BGP route exchange
#define DEBUG_CATEGORY_SOCKET      ((debug_category_t)1 << 13)  // Socket operations
#define DEBUG_CATEGORY_ALL         ((debug_category_t)0xFFFFFFFFFFFFFFFFULL)

/* Debug configuration structure */
typedef struct {
    debug_level_t level;                   // Global debug level
    debug_category_t categories;           // Enabled categories (bitmask)
    int timestamp_enabled;                 // Include timestamps in output
    int function_name_enabled;             // Include function names
    int file_line_enabled;                 // Include file:line info
    const char* output_file;               // NULL = stdout, otherwise file path
} debug_config_t;

/* Global debug configuration */
extern debug_config_t g_debug_config;

/* Initialize debug system with default settings */
void debug_config_init(void);

/* Set debug level */
void debug_set_level(debug_level_t level);

/* Enable/disable specific categories */
void debug_enable_category(debug_category_t category);
void debug_disable_category(debug_category_t category);
void debug_set_categories(debug_category_t categories);

/* Set masks directly */
void debug_set_masks(debug_category_t categories, debug_level_t level);

/* Configure output options */
void debug_enable_timestamp(int enable);
void debug_enable_function_name(int enable);
void debug_enable_file_line(int enable);
void debug_set_output_file(const char* file_path);

// вывод struct sockaddr_storage как текст
size_t addr_to_string(const struct sockaddr_storage *addr, char *buf, size_t buflen);

// hex dump в лог
void log_dump(const char* prefix, const uint8_t* data, size_t len);

#include <stdio.h>
extern FILE* debug_output_file;

/* Check if debug output should be shown for given level and category */
int debug_should_output(debug_level_t level, debug_category_t category);

/* Get current debug level */
debug_level_t debug_get_level(void);

/* Format and output debug message (internal use by macros) */
void debug_output(debug_level_t level, debug_category_t category, 
                 const char* function, const char* file, int line,
                 const char* format, ...);

/* Parse debug configuration from string (e.g., "modules=etcp,memory;level=4" or "modules=all;level=4") */
int debug_parse_config(const char* config_string);

/* Convenience macros for debug output */
#define DEBUG_ERROR(category, fmt, ...) \
    do { if (debug_should_output(DEBUG_LEVEL_ERROR, category)) { \
        debug_output(DEBUG_LEVEL_ERROR, category, __FUNCTION__, __FILE__, __LINE__, fmt, ##__VA_ARGS__); \
    } } while(0)

#define DEBUG_WARN(category, fmt, ...) \
    do { if (debug_should_output(DEBUG_LEVEL_WARN, category)) { \
        debug_output(DEBUG_LEVEL_WARN, category, __FUNCTION__, __FILE__, __LINE__, fmt, ##__VA_ARGS__); \
    } } while(0)

#define DEBUG_INFO(category, fmt, ...) \
    do { if (debug_should_output(DEBUG_LEVEL_INFO, category)) { \
        debug_output(DEBUG_LEVEL_INFO, category, __FUNCTION__, __FILE__, __LINE__, fmt, ##__VA_ARGS__); \
    } } while(0)

#define DEBUG_DEBUG(category, fmt, ...) \
    do { if (debug_should_output(DEBUG_LEVEL_DEBUG, category)) { \
        debug_output(DEBUG_LEVEL_DEBUG, category, __FUNCTION__, __FILE__, __LINE__, fmt, ##__VA_ARGS__); \
    } } while(0)

#define DEBUG_TRACE(category, fmt, ...) \
    do { if (debug_should_output(DEBUG_LEVEL_TRACE, category)) { \
        debug_output(DEBUG_LEVEL_TRACE, category, __FUNCTION__, __FILE__, __LINE__, fmt, ##__VA_ARGS__); \
    } } while(0)

/* Backward compatibility - default to ERROR level if not specified */
#define DEBUG_OUTPUT(fmt, ...) DEBUG_ERROR(DEBUG_CATEGORY_ALL, fmt, ##__VA_ARGS__)

#ifdef __cplusplus
}
#endif

#endif // DEBUG_CONFIG_H