/*
 * canbus_config.h
 * NVS-backed configuration for CAN bus module.
 *
 * Stores: bitrate, oscillator freq, software filters, discovered ECU IDs.
 */
#pragma once

#include "esp_err.h"
#include <stdint.h>
#include <stdbool.h>

#define CAN_CFG_MAX_SW_FILTERS  16
#define CAN_CFG_MAX_ECUS        16

/* Init NVS namespace (call once at module registration) */
void can_config_init(void);

/* Bitrate (persistent) */
int       can_config_get_bitrate(void);
esp_err_t can_config_set_bitrate(int bitrate);

/* Oscillator frequency in MHz (persistent) */
uint8_t   can_config_get_osc_mhz(void);
esp_err_t can_config_set_osc_mhz(uint8_t mhz);

/* Software filters — app-level ID whitelist (beyond MCP2515 6 HW filters) */
int       can_config_get_filters(uint32_t *ids_out, int max_ids);
esp_err_t can_config_add_filter(uint32_t id);
esp_err_t can_config_del_filter(uint32_t id);
esp_err_t can_config_clear_filters(void);

/* Discovered ECU IDs (for UDS, persistent across reboots) */
int       can_config_get_ecus(uint32_t *ids_out, int max_ids);
esp_err_t can_config_add_ecu(uint32_t id);
esp_err_t can_config_clear_ecus(void);

/* Reset all config to defaults */
esp_err_t can_config_reset_all(void);

/* List all config as formatted string (for status response) */
int can_config_list(char *buf, size_t buf_len);