#include "../include/nx/software/SystemSettingsApi.h"

#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include "KeyValueParser.h"
#include <string.h>
#include "../include/nx/software/SystemSettings.h"

#define IPV4_ADDR_SIZE 4

/* curl example:
 curl -v -X POST http://192.168.4.1/sys -d \
 ssid=myssid&wpass=mypassword&wpwsave=1&wstatic=1&ip=3232237657&gw=3232237569&mask=4294967040
*/

#define API_KEY_SSID            "ssid"
#define API_KEY_WPASS           "wpass"
#define API_KEY_WPWSAVE         "wpwsave"
#define API_KEY_USE_STATIC      "wstatic"
#define API_KEY_IPV4ADDR        "ip"
#define API_KEY_IPV4GW          "gw"
#define API_KEY_IPV4MASK        "mask"
#define API_KEY_DNS_ADDR        "dns"
#define API_KEY_SNTP_ADDR       "sntp"
#define API_KEY_TZ_ENV          "tz"
#define API_KEY_RS_SCHEDULE     "rsch"
#define API_KEY_DEVNAME         "dn"
#define API_KEY_RESTORE         "restore_default"

#define UNUSED(x) (void)(x)

#define RESP_BUF_SIZE 1024

char responseBuffer[RESP_BUF_SIZE];

void int2ip(uint8_t array[4], uint32_t addr)
{
  array[0] = (addr & 0xFF000000) >> 24;
  array[1] = (addr & 0x00FF0000) >> 16;
  array[2] = (addr & 0x0000FF00) >> 8;
  array[3] = (addr & 0x000000FF);
}

void handleKvPair(const char* key, const char* value, const void* userData, bool* done)
{
  printf("System settings update; Key: %s, Value: %s\n", key, value);

  SystemSettings* settings = nxGetSystemSettings();
  if (strcmp(key, API_KEY_RESTORE) == 0) {
    nxRestoreSystemDefaultSettings();
  }
  else if (strcmp(key, API_KEY_SSID) == 0) {
    strcpy(settings->wifiSsid, value);
  }
  else if (strcmp(key, API_KEY_WPASS) == 0) {
    strcpy(settings->wifiPassword, value);
  }
  else if (strcmp(key, API_KEY_WPWSAVE) == 0) {
    settings->wifiPowerSave = atoi(value);
  }
  else if (strcmp(key, API_KEY_USE_STATIC) == 0) {
    settings->useStaticAddr = atoi(value);
  }
  else if (strcmp(key, API_KEY_IPV4ADDR) == 0) {
    uint32_t addr = strtoul(value, NULL, 10);
    int2ip(settings->ip4addr, addr);
  }
  else if (strcmp(key, API_KEY_IPV4GW) == 0) {
    uint32_t addr = strtoul(value, NULL, 10);
    int2ip(settings->ip4gw, addr);
  }
  else if (strcmp(key, API_KEY_IPV4MASK) == 0) {
    uint32_t addr = strtoul(value, NULL, 10);
    int2ip(settings->ip4mask, addr);
  }
  else if (strcmp(key, API_KEY_DNS_ADDR) == 0) {
    uint32_t addr = strtoul(value, NULL, 10);
    int2ip(settings->dnsAddr, addr);
  }
  else if (strcmp(key, API_KEY_SNTP_ADDR) == 0) {
    strcpy(settings->sntpAddr, value);
  }
  else if (strcmp(key, API_KEY_TZ_ENV) == 0) {
    strcpy(settings->tzEnv, value);
  }
  else if (strcmp(key, API_KEY_RS_SCHEDULE) == 0) {
    strcpy(settings->rsSchedule, value);
  }
  else {
    fprintf(stderr, "Unknown key: %s\n", key);
  }
}

// --------- Public API --------- //

void nxApiGetSystemSettings(const uint8_t* msg, size_t msgLen,
              const char** response, size_t* respLen)
{
  UNUSED(msg); UNUSED(msgLen);
  memset(responseBuffer, 0, RESP_BUF_SIZE);
  SystemSettings* settings = nxGetSystemSettings();

  sprintf(responseBuffer,
      "{"
      "\"%s\":\"%s\", " // ssid
      "\"%s\":%i, " // power save
      "\"%s\":%i, " // use static ip
      "\"%s\":\"%i.%i.%i.%i\", " // ip
      "\"%s\":\"%i.%i.%i.%i\", " // gw
      "\"%s\":\"%i.%i.%i.%i\"," // mask
      "\"%s\":\"%i.%i.%i.%i\"," // dns
      "\"%s\":\"%s\"," // sntp
      "\"%s\":\"%s\"," // tz
      "\"%s\":\"%s\"," // rsch
      "\"%s\":\"%s\"" // dn
      "}",
      API_KEY_SSID, settings->wifiSsid,
      API_KEY_WPWSAVE, settings->wifiPowerSave,
      API_KEY_USE_STATIC, settings->useStaticAddr,
      API_KEY_IPV4ADDR, settings->ip4addr[0], settings->ip4addr[1], settings->ip4addr[2], settings->ip4addr[3],
      API_KEY_IPV4GW, settings->ip4gw[0], settings->ip4gw[1], settings->ip4gw[2], settings->ip4gw[3],
      API_KEY_IPV4MASK, settings->ip4mask[0], settings->ip4mask[1], settings->ip4mask[2], settings->ip4mask[3],
      API_KEY_DNS_ADDR, settings->dnsAddr[0], settings->dnsAddr[1], settings->dnsAddr[2], settings->dnsAddr[3],
      API_KEY_SNTP_ADDR, settings->sntpAddr,
      API_KEY_TZ_ENV, settings->tzEnv,
      API_KEY_RS_SCHEDULE, settings->rsSchedule,
      API_KEY_DEVNAME, settings->deviceName
  );
  *response = responseBuffer;
  *respLen = strlen(responseBuffer);
}

void nxApiUpdateSystemSettings(const uint8_t* msg, size_t msgLen,
    const char** response, size_t* respLen)
{
  nxParseKeyValueString((const char*)msg, handleKvPair, NULL);
  nxWriteSystemSettings();
}