/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
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 * 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 mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
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 * the Initial Developer. All Rights Reserved.
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 *
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// datetime implementation

#include "nsDateTimeChannel.h"
#include "nsNetUtil.h"
#include "nsIServiceManager.h"
#include "nsILoadGroup.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsXPIDLString.h"
#include "nsISocketTransportService.h"
#include "nsITransport.h"
#include "nsIProgressEventSink.h"

// nsDateTimeChannel methods
nsDateTimeChannel::nsDateTimeChannel() {
    NS_INIT_REFCNT();
    mContentLength = -1;
    mPort = -1;
}

nsDateTimeChannel::~nsDateTimeChannel() {
}

NS_IMPL_ISUPPORTS4(nsDateTimeChannel, 
                   nsIChannel, 
                   nsIRequest, 
                   nsIStreamListener, 
                   nsIRequestObserver)

nsresult
nsDateTimeChannel::Init(nsIURI* uri, nsIProxyInfo* proxyInfo)
{
    nsresult rv;

    NS_ASSERTION(uri, "no uri");

    mUrl = uri;
    mProxyInfo = proxyInfo;

    rv = mUrl->GetPort(&mPort);
    if (NS_FAILED(rv) || mPort < 1)
        mPort = DATETIME_PORT;

    rv = mUrl->GetPath(getter_Copies(mHost));
    if (NS_FAILED(rv)) return rv;

    if (!*(const char *)mHost) return NS_ERROR_NOT_INITIALIZED;

    return NS_OK;
}

NS_METHOD
nsDateTimeChannel::Create(nsISupports* aOuter, const nsIID& aIID, void* *aResult)
{
    nsDateTimeChannel* dc = new nsDateTimeChannel();
    if (dc == nsnull)
        return NS_ERROR_OUT_OF_MEMORY;
    NS_ADDREF(dc);
    nsresult rv = dc->QueryInterface(aIID, aResult);
    NS_RELEASE(dc);
    return rv;
}

////////////////////////////////////////////////////////////////////////////////
// nsIRequest methods:

NS_IMETHODIMP
nsDateTimeChannel::GetName(PRUnichar* *result)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsDateTimeChannel::IsPending(PRBool *result)
{
    NS_NOTREACHED("nsDateTimeChannel::IsPending");
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsDateTimeChannel::GetStatus(nsresult *status)
{
    *status = NS_OK;
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::Cancel(nsresult status)
{
    NS_ASSERTION(NS_FAILED(status), "shouldn't cancel with a success code");
    NS_NOTREACHED("nsDateTimeChannel::Cancel");
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsDateTimeChannel::Suspend(void)
{
    NS_NOTREACHED("nsDateTimeChannel::Suspend");
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsDateTimeChannel::Resume(void)
{
    NS_NOTREACHED("nsDateTimeChannel::Resume");
    return NS_ERROR_NOT_IMPLEMENTED;
}

////////////////////////////////////////////////////////////////////////////////
// nsIChannel methods:

NS_IMETHODIMP
nsDateTimeChannel::GetOriginalURI(nsIURI* *aURI)
{
    *aURI = mOriginalURI ? mOriginalURI : mUrl;
    NS_ADDREF(*aURI);
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::SetOriginalURI(nsIURI* aURI)
{
    mOriginalURI = aURI;
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::GetURI(nsIURI* *aURI)
{
    *aURI = mUrl;
    NS_IF_ADDREF(*aURI);
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::Open(nsIInputStream **_retval)
{
    nsresult rv = NS_OK;
    rv = NS_CheckPortSafety(mPort, "datetime");
    if (NS_FAILED(rv))
      return rv;

    nsCOMPtr<nsISocketTransportService> sts = 
             do_GetService("@mozilla.org/network/socket-transport-service;1", &rv);
    if (NS_FAILED(rv)) return rv;

    nsCOMPtr<nsITransport> transport;
    rv = sts->CreateTransport(mHost,
                              mPort,
                              mProxyInfo,
                              32,
                              32,
                              getter_AddRefs(transport));
    if (NS_FAILED(rv)) return rv;

    transport->SetNotificationCallbacks(mCallbacks,
                                        (mLoadFlags & LOAD_BACKGROUND));

    return transport->OpenInputStream(0, -1, 0, _retval);
}

NS_IMETHODIMP
nsDateTimeChannel::AsyncOpen(nsIStreamListener *aListener, nsISupports *ctxt)
{
    nsresult rv = NS_OK;
    rv = NS_CheckPortSafety(mPort, "datetime");
    if (NS_FAILED(rv))
      return rv;

    nsCOMPtr<nsISocketTransportService> sts = 
             do_GetService("@mozilla.org/network/socket-transport-service;1", &rv);
    if (NS_FAILED(rv)) return rv;

    nsCOMPtr<nsITransport> transport;
    rv = sts->CreateTransport(mHost,
                              mPort,
                              mProxyInfo,
                              32,
                              32,
                              getter_AddRefs(transport));
    if (NS_FAILED(rv)) return rv;

    transport->SetNotificationCallbacks(mCallbacks,
                                        (mLoadFlags & LOAD_BACKGROUND));

    mListener = aListener;
    
    nsCOMPtr<nsIRequest> request;
    return transport->AsyncRead(this, ctxt, 0, -1, 0, getter_AddRefs(request));
}

NS_IMETHODIMP
nsDateTimeChannel::GetLoadFlags(PRUint32 *aLoadFlags)
{
    *aLoadFlags = mLoadFlags;
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::SetLoadFlags(PRUint32 aLoadFlags)
{
    mLoadFlags = aLoadFlags;
    return NS_OK;
}

#define DATETIME_TYPE "text/plain"

NS_IMETHODIMP
nsDateTimeChannel::GetContentType(char* *aContentType) {
    if (!aContentType) return NS_ERROR_NULL_POINTER;

    *aContentType = nsCRT::strdup(DATETIME_TYPE);
    if (!*aContentType) return NS_ERROR_OUT_OF_MEMORY;
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::SetContentType(const char *aContentType)
{
    //It doesn't make sense to set the content-type on this type
    // of channel...
    return NS_ERROR_FAILURE;
}

NS_IMETHODIMP
nsDateTimeChannel::GetContentLength(PRInt32 *aContentLength)
{
    *aContentLength = mContentLength;
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::SetContentLength(PRInt32 aContentLength)
{
    NS_NOTREACHED("nsDateTimeChannel::SetContentLength");
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsDateTimeChannel::GetLoadGroup(nsILoadGroup* *aLoadGroup)
{
    *aLoadGroup = mLoadGroup;
    NS_IF_ADDREF(*aLoadGroup);
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::SetLoadGroup(nsILoadGroup* aLoadGroup)
{
    if (mLoadGroup) // if we already had a load group remove ourselves...
      (void)mLoadGroup->RemoveRequest(this, nsnull, NS_OK);

    mLoadGroup = aLoadGroup;
    if (mLoadGroup) {
        return mLoadGroup->AddRequest(this, nsnull);
    }
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::GetOwner(nsISupports* *aOwner)
{
    *aOwner = mOwner.get();
    NS_IF_ADDREF(*aOwner);
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::SetOwner(nsISupports* aOwner)
{
    mOwner = aOwner;
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::GetNotificationCallbacks(nsIInterfaceRequestor* *aNotificationCallbacks)
{
    *aNotificationCallbacks = mCallbacks.get();
    NS_IF_ADDREF(*aNotificationCallbacks);
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aNotificationCallbacks)
{
    mCallbacks = aNotificationCallbacks;
    return NS_OK;
}

NS_IMETHODIMP
nsDateTimeChannel::GetSecurityInfo(nsISupports **sec)
{
    NS_ENSURE_ARG_POINTER(sec);
    *sec = nsnull;
    return NS_OK;
}

// nsIRequestObserver methods
NS_IMETHODIMP
nsDateTimeChannel::OnStartRequest(nsIRequest *request, nsISupports *aContext) {
    return mListener->OnStartRequest(this, aContext);
}


NS_IMETHODIMP
nsDateTimeChannel::OnStopRequest(nsIRequest *request, nsISupports* aContext,
                                 nsresult aStatus) {
    if (mLoadGroup) {
        nsresult rv = mLoadGroup->RemoveRequest(this, nsnull, aStatus);
        if (NS_FAILED(rv)) return rv;
    }
    return mListener->OnStopRequest(this, aContext, aStatus);
}


// nsIStreamListener method
NS_IMETHODIMP
nsDateTimeChannel::OnDataAvailable(nsIRequest *request, nsISupports* aContext,
                               nsIInputStream *aInputStream, PRUint32 aSourceOffset,
                               PRUint32 aLength) {
    mContentLength = aLength;
    return mListener->OnDataAvailable(this, aContext, aInputStream, aSourceOffset, aLength);
}