/*
 * utun_config_api.h — configuration provider API for Android
 *
 * C core requests config values from Kotlin via callbacks.
 * For headless, a stub provider reads from environment variables.
 * For Android, JNI bridge sets callbacks that query Kotlin DataStore.
 */
#ifndef UTUN_CONFIG_API_H
#define UTUN_CONFIG_API_H

#include <stdint.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

/* ── Config provider interface ── */

typedef struct {
    const char* (*get_string)(const char* key, const char* default_val);
    int64_t     (*get_int64)(const char* key, int64_t default_val);
    int         (*get_int)(const char* key, int default_val);
    int         (*get_bool)(const char* key, int default_val);
} utun_config_provider_t;

void utun_config_set_provider(const utun_config_provider_t* provider);

/* ── Key constants (used by C code to request values) ── */

#define CFG_KEY_NODE_PRIVATE_KEY   "node.private_key"
#define CFG_KEY_NODE_PUBLIC_KEY    "node.public_key"
#define CFG_KEY_NODE_NAME          "node.name"
#define CFG_KEY_NODE_LISTEN_PORT   "node.listen_port"

#define CFG_KEY_CONTROL_PORT        "control.port"
#define CFG_KEY_CONTROL_BIND_IP     "control.bind_ip"

#define CFG_KEY_DB_PATH             "db.path"

#define CFG_KEY_DEBUG_CONSOLE_LEVEL "debug.console_level"
#define CFG_KEY_DEBUG_FILE_LEVEL    "debug.file_level"
#define CFG_KEY_DEBUG_LOG_FILE      "debug.log_file"
#define CFG_KEY_DEBUG_CATEGORIES    "debug.categories"

/* ── Convenience accessors ── */

const char* cfg_get_string(const char* key, const char* def);
int64_t     cfg_get_int64(const char* key, int64_t def);
int         cfg_get_int(const char* key, int def);
int         cfg_get_bool(const char* key, int def);

#ifdef __cplusplus
}
#endif
#endif /* UTUN_CONFIG_API_H */