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#include "config.h"
#include "esp_log.h"
#include "esp_spiffs.h"
#include "esp_system.h"
#include "esp_mac.h"
#include "lwip/ip4_addr.h"
#include "cJSON.h"
#include <string.h>
#include <stdio.h>
static const char *TAG = "tollgate_config";
static tollgate_config_t g_config;
esp_err_t tollgate_config_init(void)
{
memset(&g_config, 0, sizeof(g_config));
g_config.max_retry = 5;
g_config.ap_channel = 1;
g_config.ap_max_conn = 4;
g_config.price_per_step = 21;
g_config.step_size_ms = 60000;
esp_vfs_spiffs_conf_t conf = {
.base_path = "/spiffs",
.partition_label = NULL,
.max_files = 5,
.format_if_mount_failed = true,
};
esp_err_t ret = esp_vfs_spiffs_register(&conf);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Failed to mount SPIFFS: %s", esp_err_to_name(ret));
return ret;
}
FILE *f = fopen("/spiffs/config.json", "r");
if (!f) {
ESP_LOGW(TAG, "No config.json found, generating default");
const char *default_json = "{"
"\"wifi_networks\":["
"{\"ssid\":\"EnterSSID-2.4GHz\",\"password\":\"c03rad0r123!\"}"
"],"
"\"ap_ssid\":\"TollGate\","
"\"ap_password\":\"\","
"\"ap_channel\":1,"
"\"mint_url\":\"https://testnut.cashu.space\","
"\"lnurl_url\":\"https://redeem.cashu.me/.well-known/lnurlp/tollgate\","
"\"price_per_step\":21,"
"\"step_size_ms\":60000"
"}";
f = fopen("/spiffs/config.json", "w");
if (f) {
fputs(default_json, f);
fclose(f);
}
f = fopen("/spiffs/config.json", "r");
}
if (!f) {
ESP_LOGE(TAG, "Failed to open config.json");
return ESP_FAIL;
}
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET);
char *buf = malloc(fsize + 1);
if (!buf) {
fclose(f);
return ESP_ERR_NO_MEM;
}
fread(buf, 1, fsize, f);
buf[fsize] = '\0';
fclose(f);
cJSON *root = cJSON_Parse(buf);
free(buf);
if (!root) {
ESP_LOGE(TAG, "Failed to parse config.json");
return ESP_FAIL;
}
cJSON *networks = cJSON_GetObjectItem(root, "wifi_networks");
if (networks && cJSON_IsArray(networks)) {
int count = cJSON_GetArraySize(networks);
if (count > TOLLGATE_MAX_WIFI_NETWORKS) count = TOLLGATE_MAX_WIFI_NETWORKS;
for (int i = 0; i < count; i++) {
cJSON *net = cJSON_GetArrayItem(networks, i);
cJSON *ssid = cJSON_GetObjectItem(net, "ssid");
cJSON *pass = cJSON_GetObjectItem(net, "password");
if (ssid && pass) {
strncpy(g_config.networks[i].ssid, ssid->valuestring, sizeof(g_config.networks[i].ssid) - 1);
strncpy(g_config.networks[i].password, pass->valuestring, sizeof(g_config.networks[i].password) - 1);
g_config.network_count++;
}
}
}
cJSON *ap_ssid = cJSON_GetObjectItem(root, "ap_ssid");
if (ap_ssid) strncpy(g_config.ap_ssid, ap_ssid->valuestring, sizeof(g_config.ap_ssid) - 1);
else strncpy(g_config.ap_ssid, "TollGate", sizeof(g_config.ap_ssid) - 1);
cJSON *ap_pass = cJSON_GetObjectItem(root, "ap_password");
if (ap_pass) strncpy(g_config.ap_password, ap_pass->valuestring, sizeof(g_config.ap_password) - 1);
cJSON *ap_ch = cJSON_GetObjectItem(root, "ap_channel");
if (ap_ch) g_config.ap_channel = ap_ch->valueint;
cJSON *mint = cJSON_GetObjectItem(root, "mint_url");
if (mint) strncpy(g_config.mint_url, mint->valuestring, sizeof(g_config.mint_url) - 1);
cJSON *lnurl = cJSON_GetObjectItem(root, "lnurl_url");
if (lnurl) strncpy(g_config.lnurl_url, lnurl->valuestring, sizeof(g_config.lnurl_url) - 1);
cJSON *price = cJSON_GetObjectItem(root, "price_per_step");
if (price) g_config.price_per_step = price->valueint;
cJSON *step = cJSON_GetObjectItem(root, "step_size_ms");
if (step) g_config.step_size_ms = step->valueint;
cJSON_Delete(root);
ESP_LOGI(TAG, "Config loaded: AP='%s', %d WiFi networks, price=%d sats/%dms",
g_config.ap_ssid, g_config.network_count, g_config.price_per_step, g_config.step_size_ms);
return ESP_OK;
}
const tollgate_config_t *tollgate_config_get(void)
{
return &g_config;
}
esp_err_t tollgate_config_get_wifi(wifi_config_t *wifi_config)
{
if (g_config.network_count == 0) return ESP_ERR_NOT_FOUND;
int idx = g_config.current_network % g_config.network_count;
memset(wifi_config, 0, sizeof(wifi_config_t));
strncpy((char *)wifi_config->sta.ssid, g_config.networks[idx].ssid, sizeof(wifi_config->sta.ssid) - 1);
strncpy((char *)wifi_config->sta.password, g_config.networks[idx].password, sizeof(wifi_config->sta.password) - 1);
wifi_config->sta.threshold.authmode = WIFI_AUTH_WPA2_PSK;
return ESP_OK;
}
esp_err_t tollgate_config_get_next_wifi(wifi_config_t *wifi_config)
{
g_config.current_network = (g_config.current_network + 1) % g_config.network_count;
return tollgate_config_get_wifi(wifi_config);
}
void tollgate_config_derive_unique(tollgate_config_t *cfg)
{
if (cfg->unique_derived) return;
uint8_t mac[6];
esp_read_mac(mac, ESP_MAC_WIFI_STA);
snprintf(cfg->ap_ssid + strlen(cfg->ap_ssid),
TOLLGATE_MAX_AP_SSID_LEN - strlen(cfg->ap_ssid),
"-%02X%02X", mac[4], mac[5]);
uint8_t b5 = mac[4];
uint8_t b6 = mac[5];
uint8_t subnet = (b5 ^ b6) % 200 + 10;
IP4_ADDR(&cfg->ap_ip, 10, b5, subnet, 1);
snprintf(cfg->ap_ip_str, sizeof(cfg->ap_ip_str), IPSTR, IP2STR(&cfg->ap_ip));
cfg->unique_derived = true;
ESP_LOGI(TAG, "Unique config: SSID='%s', AP_IP=%s", cfg->ap_ssid, cfg->ap_ip_str);
}
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