#ifndef CONFIG_H
#define CONFIG_H

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "board.h"

#define CONFIG_MAGIC 0x414E4458u /* 'ANDX' */
#define CONFIG_VERSION 3

#define CONFIG_SSID_MAX 32
#define CONFIG_PASS_MAX 64
#define CONFIG_HOSTNAME_MAX 32

typedef enum {
    WIFI_MODE_AP = 0,
    WIFI_MODE_STA = 1,
    /** Legacy flash value; treated as STA (with AP fallback on failure). */
    WIFI_MODE_AP_STA = 2,
} wifi_mode_t;

typedef struct {
    uint32_t magic;
    uint32_t version;
    uint32_t crc;
    wifi_mode_t wifi_mode;
    char sta_ssid[CONFIG_SSID_MAX];
    char sta_pass[CONFIG_PASS_MAX];
    char ap_ssid[CONFIG_SSID_MAX];
    char ap_pass[CONFIG_PASS_MAX];
    uint16_t universe_a;
    uint16_t universe_b;
    /* v3: mDNS hostname without ".local" (e.g. "artnetdmx") */
    char mdns_host[CONFIG_HOSTNAME_MAX];
} config_t;

void config_set_defaults(config_t *cfg);
bool config_load(config_t *cfg);
bool config_save(const config_t *cfg);
const config_t *config_get(void);
void config_init(void);
/** Lowercase DNS-label sanitize into out; returns false if empty/invalid → uses default. */
bool config_sanitize_hostname(const char *in, char *out, size_t out_sz);

static inline const char *wifi_mode_name(wifi_mode_t m) {
    switch (m) {
        case WIFI_MODE_STA:
        case WIFI_MODE_AP_STA:
            return "STA";
        case WIFI_MODE_AP:
        default:
            return "AP";
    }
}

#endif