/**

* @file nvs_config.h

* @brief Runtime configuration via NVS (Non-Volatile Storage).

*

* Reads WiFi credentials and aggregator target from NVS.

* Falls back to compile-time Kconfig defaults if NVS keys are absent.

* This allows a single firmware binary to be shipped and configured

* per-device using the provisioning script.

*/

#ifndef NVS_CONFIG_H

#define NVS_CONFIG_H

#include <stdint.h>

/** Maximum lengths for NVS string fields. */

#define NVS_CFG_SSID_MAX 33

#define NVS_CFG_PASS_MAX 65

#define NVS_CFG_IP_MAX 16

/** Maximum channels in the hop list (must match CSI_HOP_CHANNELS_MAX). */

#define NVS_CFG_HOP_MAX 6

/** Runtime configuration loaded from NVS or Kconfig defaults. */

typedef struct {

char wifi_ssid[NVS_CFG_SSID_MAX];

char wifi_password[NVS_CFG_PASS_MAX];

char target_ip[NVS_CFG_IP_MAX];

uint16_t target_port;

uint8_t node_id;

/* ADR-029: Channel hopping and TDM configuration */

uint8_t channel_hop_count; /**< Number of channels to hop (1 = no hop). */

uint8_t channel_list[NVS_CFG_HOP_MAX]; /**< Channel numbers for hopping. */

uint32_t dwell_ms; /**< Dwell time per channel in ms. */

uint8_t tdm_slot_index; /**< This node's TDM slot index (0-based). */

uint8_t tdm_node_count; /**< Total nodes in the TDM schedule. */

/* ADR-039: Edge intelligence configuration */

uint8_t edge_tier; /**< Processing tier (0=raw, 1=basic, 2=full). */

float presence_thresh; /**< Presence threshold (0 = auto-calibrate). */

float fall_thresh; /**< Fall detection threshold (rad/s^2). */

uint16_t vital_window; /**< Phase history window for BPM. */

uint16_t vital_interval_ms; /**< Vitals packet interval (ms). */

uint8_t top_k_count; /**< Number of top subcarriers to track. */

uint8_t power_duty; /**< Power duty cycle (10-100%). */

/* ADR-040: WASM programmable sensing configuration */

uint8_t wasm_max_modules; /**< Max concurrent WASM modules (1-8). */

uint8_t wasm_verify; /**< Require Ed25519 signature for uploads. */

uint8_t wasm_pubkey[32]; /**< Ed25519 public key for WASM signature. */

uint8_t wasm_pubkey_valid; /**< 1 if pubkey was loaded from NVS. */

} nvs_config_t;

/**

* Load configuration from NVS, falling back to Kconfig defaults.

*

* Must be called after nvs_flash_init().

*

* @param cfg Output configuration struct.

*/

void nvs_config_load(nvs_config_t *cfg);

#endif /* NVS_CONFIG_H */