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#include "url_request_custom_job_proxy.h"
#include "url_request_custom_job.h"
#include "url_request_custom_job_delegate.h"
#include "api/qwebengineurlrequestjob.h"
#include "browser_context_adapter.h"
#include "type_conversion.h"
#include "content/public/browser/browser_thread.h"

using namespace net;

namespace QtWebEngineCore {

URLRequestCustomJobProxy::URLRequestCustomJobProxy(URLRequestCustomJob *job,
                                                   const std::string &scheme,
                                                   QWeakPointer<const BrowserContextAdapter> adapter)
    : m_job(job)
    , m_started(false)
    , m_scheme(scheme)
    , m_delegate(nullptr)
    , m_adapter(adapter)
{
    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
}

URLRequestCustomJobProxy::~URLRequestCustomJobProxy()
{
}

void URLRequestCustomJobProxy::release()
{
    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
    if (m_delegate) {
        m_delegate->deleteLater();
        m_delegate = nullptr;
    }
}

// Fix me: this is  never used
/*
void URLRequestCustomJobProxy::setReplyCharset(const std::string &charset)
{
    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
    if (!m_job)
        return;
    m_job->m_charset = charset;
}
*/
void URLRequestCustomJobProxy::reply(std::string mimeType, QIODevice *device)
{
    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
    if (!m_job)
        return;
    m_job->m_mimeType = mimeType;
    m_job->m_device = device;
    if (m_job->m_device && !m_job->m_device->isReadable())
        m_job->m_device->open(QIODevice::ReadOnly);

    qint64 size = m_job->m_device ? m_job->m_device->size() : -1;
    if (size > 0)
        m_job->set_expected_content_size(size);
    if (m_job->m_device && m_job->m_device->isReadable()) {
        m_started = true;
        m_job->NotifyHeadersComplete();
    } else {
        fail(ERR_INVALID_URL);
    }
}

void URLRequestCustomJobProxy::redirect(GURL url)
{
    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
    if (!m_job)
        return;
    if (m_job->m_device || m_job->m_error)
        return;
    m_job->m_redirect = url;
    m_started = true;
    m_job->NotifyHeadersComplete();
}

void URLRequestCustomJobProxy::abort()
{
    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
    if (!m_job)
        return;
    if (m_job->m_device && m_job->m_device->isOpen())
        m_job->m_device->close();
    m_job->m_device = nullptr;
    if (m_started)
        m_job->NotifyCanceled();
    else
        m_job->NotifyStartError(URLRequestStatus(URLRequestStatus::CANCELED, ERR_ABORTED));
}

void URLRequestCustomJobProxy::fail(int error)
{
    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
    if (!m_job)
        return;
    m_job->m_error = error;
    if (m_job->m_device)
        m_job->m_device->close();
    if (!m_started)
        m_job->NotifyStartError(URLRequestStatus::FromError(error));
    // else we fail on the next read, or the read that might already be in progress
}

void URLRequestCustomJobProxy::readyRead()
{
    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
    if (m_job)
        m_job->notifyReadyRead();
}

void URLRequestCustomJobProxy::initialize(GURL url, std::string method, base::Optional<url::Origin> initiator)
{
    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
    Q_ASSERT(!m_delegate);

    QUrl initiatorOrigin;
    if (initiator.has_value())
        initiatorOrigin = QUrl::fromEncoded(QByteArray::fromStdString(initiator.value().Serialize()));

    QWebEngineUrlSchemeHandler *schemeHandler = 0;
    QSharedPointer<const BrowserContextAdapter> browserContext = m_adapter.toStrongRef();
    if (browserContext)
        schemeHandler = browserContext->customUrlSchemeHandlers()[toQByteArray(m_scheme)];
    if (schemeHandler) {
        m_delegate = new URLRequestCustomJobDelegate(this, toQt(url),
                                                     QByteArray::fromStdString(method),
                                                     initiatorOrigin);
        QWebEngineUrlRequestJob *requestJob = new QWebEngineUrlRequestJob(m_delegate);
        schemeHandler->requestStarted(requestJob);
    }
}

} // namespace
