/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Mozilla browser.
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications, Inc.  Portions created by Netscape are
 * Copyright (C) 1999, Mozilla.  All Rights Reserved.
 * 
 * Contributor(s):
 *   Scott MacGregor <mscott@netscape.com>
 */

#include "nsOSHelperAppService.h"
#include "nsISupports.h"
#include "nsString.h"
#include "nsXPIDLString.h"
#include "nsIURL.h"
#include "nsILocalFile.h"
#include "nsILocalFileMac.h"
#include "nsMimeTypes.h"
#include "nsIStringBundle.h"
#include "nsIPromptService.h"
#include "nsMemory.h"
#include "nsCRT.h"
#include "nsMIMEInfoMac.h"

#include "nsIInternetConfigService.h"

#include <LaunchServices.h>

// chrome URL's
#define HELPERAPPLAUNCHER_BUNDLE_URL "chrome://global/locale/helperAppLauncher.properties"
#define BRAND_BUNDLE_URL "chrome://global/locale/brand.properties"

#define NS_PROMPTSERVICE_CONTRACTID "@mozilla.org/embedcomp/prompt-service;1"

nsOSHelperAppService::nsOSHelperAppService() : nsExternalHelperAppService()
{
}

nsOSHelperAppService::~nsOSHelperAppService()
{}

NS_IMETHODIMP nsOSHelperAppService::ExternalProtocolHandlerExists(const char * aProtocolScheme, PRBool * aHandlerExists)
{
  // look up the protocol scheme in Internet Config....if we find a match then we have a handler for it...
  *aHandlerExists = PR_FALSE;
  // ask the internet config service to look it up for us...
  nsresult rv = NS_ERROR_FAILURE;
  nsCOMPtr<nsIInternetConfigService> icService (do_GetService(NS_INTERNETCONFIGSERVICE_CONTRACTID));
  if (icService)
  {
    rv = icService->HasProtocolHandler(aProtocolScheme, aHandlerExists);
    if (rv == NS_ERROR_NOT_AVAILABLE)
    {
      // current app is registered to handle the protocol, put up an alert
      nsCOMPtr<nsIStringBundleService> stringBundleService = do_GetService(NS_STRINGBUNDLE_CONTRACTID);
      if (stringBundleService)
      {
        nsCOMPtr<nsIStringBundle> appLauncherBundle;
        rv = stringBundleService->CreateBundle(HELPERAPPLAUNCHER_BUNDLE_URL, getter_AddRefs(appLauncherBundle));
        if (rv == NS_OK)
        {
          nsCOMPtr<nsIStringBundle> brandBundle;
          rv = stringBundleService->CreateBundle(BRAND_BUNDLE_URL, getter_AddRefs(brandBundle));
          if (rv == NS_OK)
          {
            nsXPIDLString brandName;
            rv = brandBundle->GetStringFromName(NS_LITERAL_STRING("brandShortName").get(), getter_Copies(brandName));
            if (rv == NS_OK)
            {
              nsXPIDLString errorStr;
              NS_ConvertASCIItoUCS2 proto(aProtocolScheme);
              const PRUnichar *formatStrings[] = { brandName.get(), proto.get() };
              rv = appLauncherBundle->FormatStringFromName(NS_LITERAL_STRING("protocolNotHandled").get(),
                                                           formatStrings,
                                                           2,
                                                           getter_Copies(errorStr));
              if (rv == NS_OK)
              {
                nsCOMPtr<nsIPromptService> prompt (do_GetService(NS_PROMPTSERVICE_CONTRACTID));
                if (prompt)
                  prompt->Alert(nsnull, NS_LITERAL_STRING("Alert").get(), errorStr.get());
              }
            }
          }
        }
      }
    }
  }
  return rv;
}

nsresult nsOSHelperAppService::LoadUriInternal(nsIURI * aURL)
{
  nsCAutoString url;
  nsresult rv = NS_ERROR_FAILURE;
  
  if (aURL)
  {
    aURL->GetSpec(url);
    if (!url.IsEmpty())
    {
      nsCOMPtr<nsIInternetConfigService> icService (do_GetService(NS_INTERNETCONFIGSERVICE_CONTRACTID));
      if (icService)
        rv = icService->LaunchURL(url.get());
    }
  }
  return rv;
}

nsresult nsOSHelperAppService::GetFileTokenForPath(const PRUnichar * aPlatformAppPath, nsIFile ** aFile)
{
  nsresult rv;
  nsCOMPtr<nsILocalFileMac> localFile (do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv));
  NS_ENSURE_SUCCESS(rv,rv);

  CFURLRef pathAsCFURL;
  CFStringRef pathAsCFString = ::CFStringCreateWithCharacters(NULL,
                                                              aPlatformAppPath,
                                                              nsCRT::strlen(aPlatformAppPath));
  if (!pathAsCFString)
    return NS_ERROR_OUT_OF_MEMORY;

  if (::CFStringGetCharacterAtIndex(pathAsCFString, 0) == '/') {
    // we have a Posix path
    pathAsCFURL = ::CFURLCreateWithFileSystemPath(nsnull, pathAsCFString,
                                                  kCFURLPOSIXPathStyle, PR_FALSE);
    if (!pathAsCFURL) {
      ::CFRelease(pathAsCFString);
      return NS_ERROR_OUT_OF_MEMORY;
    }
  }
  else {
    // if it doesn't start with a / it's not an absolute Posix path
    // let's check if it's a HFS path left over from old preferences

    // If it starts with a ':' char, it's not an absolute HFS path
    // so bail for that, and also if it's empty
    if (::CFStringGetLength(pathAsCFString) == 0 ||
        ::CFStringGetCharacterAtIndex(pathAsCFString, 0) == ':')
    {
      ::CFRelease(pathAsCFString);
      return NS_ERROR_FILE_UNRECOGNIZED_PATH;
    }

    pathAsCFURL = ::CFURLCreateWithFileSystemPath(nsnull, pathAsCFString,
                                                  kCFURLHFSPathStyle, PR_FALSE);
    if (!pathAsCFURL) {
      ::CFRelease(pathAsCFString);
      return NS_ERROR_OUT_OF_MEMORY;
    }
  }

  rv = localFile->InitWithCFURL(pathAsCFURL);
  ::CFRelease(pathAsCFString);
  ::CFRelease(pathAsCFURL);
  if (NS_FAILED(rv))
    return rv;
  *aFile = localFile;
  NS_IF_ADDREF(*aFile);

  return NS_OK;
}
///////////////////////////
// method overrides --> use internet config information for mime type lookup.
///////////////////////////

NS_IMETHODIMP nsOSHelperAppService::GetFromTypeAndExtension(const char * aType, const char * aFileExt, nsIMIMEInfo ** aMIMEInfo)
{
  // first, ask our base class....
  nsresult rv = nsExternalHelperAppService::GetFromTypeAndExtension(aType, aFileExt, aMIMEInfo);
  if (NS_SUCCEEDED(rv) && *aMIMEInfo) 
  {
    UpdateCreatorInfo(*aMIMEInfo);
  }
  return rv;
}

already_AddRefed<nsIMIMEInfo>
nsOSHelperAppService::GetMIMEInfoFromOS(const char * aMIMEType,
                                        const char * aFileExt,
                                        PRBool * aFound)
{
  nsIMIMEInfo* mimeInfo = nsnull;
  *aFound = PR_TRUE;

  // ask the internet config service to look it up for us...
  nsCOMPtr<nsIInternetConfigService> icService (do_GetService(NS_INTERNETCONFIGSERVICE_CONTRACTID));
  PR_LOG(mLog, PR_LOG_DEBUG, ("Mac: HelperAppService lookup for type '%s' ext '%s' (IC: 0x%p)\n",
                              aMIMEType, aFileExt, icService.get()));
  if (icService)
  {
    nsCOMPtr<nsIMIMEInfo> miByType, miByExt;
    if (aMIMEType && *aMIMEType)
      icService->FillInMIMEInfo(aMIMEType, aFileExt, getter_AddRefs(miByType));

    PRBool hasDefault = PR_FALSE;
    if (miByType)
      miByType->GetHasDefaultHandler(&hasDefault);

    if (aFileExt && *aFileExt && (!hasDefault || !miByType)) {
      icService->GetMIMEInfoFromExtension(aFileExt, getter_AddRefs(miByExt));
      if (miByExt && aMIMEType)
        miByExt->SetMIMEType(aMIMEType);
    }
    PR_LOG(mLog, PR_LOG_DEBUG, ("OS gave us: By Type: 0x%p By Ext: 0x%p type has default: %s\n",
                                miByType.get(), miByExt.get(), hasDefault ? "true" : "false"));

    // If we got two matches, and the type has no default app, copy default app
    if (!hasDefault && miByType && miByExt) {
      // IC currently always uses nsMIMEInfoBase-derived classes.
      // When it stops doing that, this code will need changing.
      // XXX This assumes that IC will give os an nsMIMEInfoBase. I'd use
      // dynamic_cast but that crashes.
      // XXX these pBy* variables are needed because .get() returns an
      // nsDerivedSafe thingy that can't be cast to nsMIMEInfoBase*
      nsIMIMEInfo* pByType = miByType.get();
      nsIMIMEInfo* pByExt = miByExt.get();
      nsMIMEInfoBase* byType = NS_STATIC_CAST(nsMIMEInfoBase*, pByType);
      nsMIMEInfoBase* byExt = NS_STATIC_CAST(nsMIMEInfoBase*, pByExt);
      if (!byType || !byExt) {
        NS_ERROR("IC gave us an nsIMIMEInfo that's no nsMIMEInfoBase! Fix nsOSHelperAppService.");
        return nsnull;
      }
      // Copy the attributes of miByType onto miByExt
      byType->CopyBasicDataTo(byExt);
      miByType = miByExt;
    }
    if (miByType)
      miByType.swap(mimeInfo);
    else if (miByExt)
      miByExt.swap(mimeInfo);
  }

  if (!mimeInfo) {
    *aFound = PR_FALSE;
    PR_LOG(mLog, PR_LOG_DEBUG, ("Creating new mimeinfo\n"));
    mimeInfo = new nsMIMEInfoMac();
    if (!mimeInfo)
      return nsnull;
    NS_ADDREF(mimeInfo);

    if (aMIMEType && *aMIMEType)
      mimeInfo->SetMIMEType(aMIMEType);
    if (aFileExt && *aFileExt)
      mimeInfo->AppendExtension(aFileExt);
  }
  
  return mimeInfo;
}

// we never want to use a hard coded value for the creator and file type for the mac. always look these values up
// from internet config.
void nsOSHelperAppService::UpdateCreatorInfo(nsIMIMEInfo * aMIMEInfo)
{
  PRUint32 macCreatorType;
  PRUint32 macFileType;
  aMIMEInfo->GetMacType(&macFileType);
  aMIMEInfo->GetMacCreator(&macCreatorType);
  
  if (macFileType == 0 || macCreatorType == 0)
  {
    // okay these values haven't been initialized yet so fetch a mime object from internet config.
    nsXPIDLCString mimeType;
    aMIMEInfo->GetMIMEType(getter_Copies(mimeType));
    nsCOMPtr<nsIInternetConfigService> icService (do_GetService(NS_INTERNETCONFIGSERVICE_CONTRACTID));
    if (icService)
    {
      nsCOMPtr<nsIMIMEInfo> osMimeObject;
      icService->FillInMIMEInfo(mimeType, nsnull, getter_AddRefs(osMimeObject));
      if (osMimeObject)
      {
        osMimeObject->GetMacType(&macFileType);
        osMimeObject->GetMacCreator(&macCreatorType);
        aMIMEInfo->SetMacCreator(macCreatorType);
        aMIMEInfo->SetMacType(macFileType);
      } // if we got an os object
    } // if we got the ic service
  } // if the creator or file type hasn't been initialized yet
}