#include "Xpclucene.h"

#include "nsLuceneUtils.h"
#include "nsIServiceManager.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsMemory.h"
#include "nsTextFormatter.h"
#include "prtime.h"
#include "prprf.h"
#include "nsITextToSubURI.h"
#include <stdlib.h>

nsresult
nsLuceneUtils::urlDecode(const nsACString& url, PRUnichar** decoded)
{
  nsresult rv;
  nsCOMPtr<nsITextToSubURI> ttsu = do_GetService(NS_ITEXTTOSUBURI_CONTRACTID, &rv);
  if (NS_SUCCEEDED(rv)) {
    rv = ttsu->UnEscapeAndConvert("UTF-8", 
            PromiseFlatCString(url).get(), decoded);
  }
  return rv;
}

nsresult
nsLuceneUtils::ParseRFC3339GMT(const nsAString& date, PRTime* aResult)
{
  PRExplodedTime et;

  PR_sscanf(NS_ConvertUTF16toUTF8(date).get(), "%d-%d-%dT%d:%d:%d+00:00",
            &et.tm_year, &et.tm_month, &et.tm_mday, &et.tm_hour, &et.tm_min,
            &et.tm_sec);
  et.tm_usec = 0;
  et.tm_params.tp_gmt_offset = 0;
  et.tm_params.tp_dst_offset = 0;

  *aResult = PR_ImplodeTime(&et);

  return NS_OK;
}

nsresult
nsLuceneUtils::FormatRFC3339GMT(PRTime aTime, nsAString& aResult)
{

  PRExplodedTime exploded;
  PR_ExplodeTime(aTime, PR_GMTParameters, &exploded);

  nsAutoString temp;
  nsTextFormatter::ssprintf(temp,
    NS_LITERAL_STRING("%04d-%02d-%02dT%02d:%02d:%02d+00:00").get(),
    exploded.tm_year,
    exploded.tm_month + 1,
    exploded.tm_mday,
    exploded.tm_hour,
    exploded.tm_min,
    exploded.tm_sec);

  /*
   * Workaround for bug #323376
   */
  aResult.Assign(temp.get());
  return NS_OK;
}

nsresult
nsLuceneUtils::ParseIndexDateGMT(const nsAString& date, PRTime* aResult)
{
  PRExplodedTime et;

  PR_sscanf(NS_ConvertUTF16toUTF8(date).get(), "%4d%2d%2d%2d%2d%2d",
            &et.tm_year, &et.tm_month, &et.tm_mday, &et.tm_hour, &et.tm_min,
            &et.tm_sec);
  et.tm_usec = 0;
  et.tm_params.tp_gmt_offset = 0;
  et.tm_params.tp_dst_offset = 0;

  *aResult = PR_ImplodeTime(&et);

  return NS_OK;
}

nsresult
nsLuceneUtils::FormatIndexDateGMT(PRTime aTime, nsAString& aResult)
{

  PRExplodedTime exploded;
  PR_ExplodeTime(aTime, PR_GMTParameters, &exploded);

  nsAutoString temp;
  nsTextFormatter::ssprintf(temp,
    NS_LITERAL_STRING("%04d%02d%02d%02d%02d%02d").get(),
    exploded.tm_year,
    exploded.tm_month + 1,
    exploded.tm_mday,
    exploded.tm_hour,
    exploded.tm_min,
    exploded.tm_sec);

  /*
   * Workaround for bug #323376
   */
  aResult.Assign(temp.get());
  return NS_OK;
}

nsresult
nsLuceneUtils::FormatRFC3339Local(PRTime aTime, nsAString& aResult)
{

  PRExplodedTime exploded;
  PR_ExplodeTime(aTime, PR_LocalTimeParameters, &exploded);

  /*
   * XXX: Do I need to consider dst offset?
   */
  PRInt32 offset = exploded.tm_params.tp_gmt_offset;
  PRInt32 offsetHours = offset / (60 * 60);
  offset -= offsetHours * 60 * 60;
  PRInt32 offsetMinutes = offset / 60;

  nsAutoString temp;
  nsTextFormatter::ssprintf(temp,
    NS_LITERAL_STRING("%04d-%02d-%02dT%02d:%02d:%02d%03d:%02d").get(),
    exploded.tm_year,
    exploded.tm_month + 1,
    exploded.tm_mday,
    exploded.tm_hour,
    exploded.tm_min,
    exploded.tm_sec,
    offsetHours,
    offsetMinutes);

  /*
   * Workaround for bug #323376
   */
  aResult.Assign(temp.get());
  return NS_OK;
}