#include "error.h"
#include "intl.h"
#include "util.h"
#include <curl/curl.h>
#include <dirent.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define HUB_URL "https://matterlinux.xyz/hub"

bool url_is_name(char *name) {
  for (char *c = name; *c != '\0'; c++) {
    if (*c == '/' || *c == '.')
      return false;
  }
  return true;
}

bool url_is_local(char *url) {
  bool ret = false;
  if (startswith(url, "http://") || startswith(url, "https://"))
    return ret;

  DIR *dir = NULL;
  if (access(url, F_OK) == 0 && (dir = opendir(url)) != NULL)
    ret = true;

  closedir(dir);
  return ret;
}

char *url_complete(char *name) {
  char url[strlen(name) + strlen(HUB_URL) + 1];
  sprintf(url, "%s/%s", HUB_URL, name);

  char *location = NULL;
  long  code     = 0;

  CURL *curl = curl_easy_init();
  if (NULL == curl) {
    error_set(_("Failed to init curl"));
    errno = UrlCurlFail;
    return NULL;
  }

  curl_easy_setopt(curl, CURLOPT_URL, url);
  curl_easy_setopt(curl, CURLOPT_USERAGENT, "libcurl/mp");
  curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 0L);
  CURLcode res = curl_easy_perform(curl);

  if (res != CURLE_OK) {
    error_set(_("Request failed"));
    errno = UrlReqFail;
    goto CLEANUP;
  }

  res = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
  if (res != CURLE_OK) {
    error_set(_("Failed to get the response code"));
    errno = UrlReqCodeFail;
    goto CLEANUP;
  }

  if ((code / 100) != 3) {
    error_set(_("Response is not a redirect"));
    errno = UrlReqBadCode;
    goto CLEANUP;
  }

  res = curl_easy_getinfo(curl, CURLINFO_REDIRECT_URL, &location);
  if (res != CURLE_OK) {
    error_set(_("Failed to get the location header"));
    errno = UrlLocationFail;
    goto CLEANUP;
  }

  if (NULL == location) {
    error_set(_("Invalid location header"));
    errno = UrlLocationBad;
    goto CLEANUP;
  }

  location = strdup(location);

CLEANUP:
  curl_easy_cleanup(curl);
  return location;
}

char *url_ensure_protocol(char *url) {
  if (startswith(url, "http://") || startswith(url, "https://"))
    return strdup(url);

  char *full = malloc(strlen("https://") + strlen(url) + 1);
  join(full, "https://", url);
  return full;
}