/**
 * @file llpanelsnapshotpostcard.cpp
 * @brief Postcard sending panel.
 *
 * $LicenseInfo:firstyear=2011&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2011, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llcombobox.h"
#include "llnotificationsutil.h"
#include "llsidetraypanelcontainer.h"
#include "llsliderctrl.h"
#include "llspinctrl.h"
#include "lltexteditor.h"

#include "llagent.h"
#include "llagentui.h"
#include "llfloatersnapshot.h" // FIXME: replace with a snapshot storage model
#include "llpanelsnapshot.h"
#include "llpostcard.h"
#include "llregex.h"
#include "llsnapshotlivepreview.h"
#include "llviewercontrol.h" // gSavedSettings
#include "llviewerwindow.h"
#include "llviewerregion.h"

#include <boost/regex.hpp>

/**
 * Sends postcard via email.
 */
class LLPanelSnapshotPostcard
:   public LLPanelSnapshot
{
    LOG_CLASS(LLPanelSnapshotPostcard);

public:
    LLPanelSnapshotPostcard();
    /*virtual*/ bool postBuild();
    /*virtual*/ void onOpen(const LLSD& key);

private:
    /*virtual*/ std::string getWidthSpinnerName() const     { return "postcard_snapshot_width"; }
    /*virtual*/ std::string getHeightSpinnerName() const    { return "postcard_snapshot_height"; }
    /*virtual*/ std::string getAspectRatioCBName() const    { return "postcard_keep_aspect_check"; }
    /*virtual*/ std::string getImageSizeComboName() const   { return "postcard_size_combo"; }
    /*virtual*/ std::string getImageSizePanelName() const   { return "postcard_image_size_lp"; }
    /*virtual*/ LLSnapshotModel::ESnapshotFormat getImageFormat() const { return LLSnapshotModel::SNAPSHOT_FORMAT_JPEG; }
    /*virtual*/ LLSnapshotModel::ESnapshotType getSnapshotType();
    /*virtual*/ void updateControls(const LLSD& info);

    bool missingSubjMsgAlertCallback(const LLSD& notification, const LLSD& response);
    static void sendPostcardFinished(LLSD result);
    void sendPostcard();

    void onMsgFormFocusRecieved();
    void onFormatComboCommit(LLUICtrl* ctrl);
    void onQualitySliderCommit(LLUICtrl* ctrl);
    void onSend();

    bool mHasFirstMsgFocus;
};

static LLPanelInjector<LLPanelSnapshotPostcard> panel_class("llpanelsnapshotpostcard");

LLPanelSnapshotPostcard::LLPanelSnapshotPostcard()
:   mHasFirstMsgFocus(false)
{
    mCommitCallbackRegistrar.add("Postcard.Send",       { boost::bind(&LLPanelSnapshotPostcard::onSend,   this), cb_info::UNTRUSTED_THROTTLE });
    mCommitCallbackRegistrar.add("Postcard.Cancel",     { boost::bind(&LLPanelSnapshotPostcard::cancel,   this), cb_info::UNTRUSTED_THROTTLE });

}

// virtual
bool LLPanelSnapshotPostcard::postBuild()
{
    // For the first time a user focuses to .the msg box, all text will be selected.
    getChild<LLUICtrl>("msg_form")->setFocusChangedCallback(boost::bind(&LLPanelSnapshotPostcard::onMsgFormFocusRecieved, this));

    getChild<LLUICtrl>("to_form")->setFocus(true);

    getChild<LLUICtrl>("image_quality_slider")->setCommitCallback(boost::bind(&LLPanelSnapshotPostcard::onQualitySliderCommit, this, _1));

    return LLPanelSnapshot::postBuild();
}

// virtual
void LLPanelSnapshotPostcard::onOpen(const LLSD& key)
{
    LLUICtrl* name_form = getChild<LLUICtrl>("name_form");
    if (name_form && name_form->getValue().asString().empty())
    {
        std::string name_string;
        LLAgentUI::buildFullname(name_string);
        getChild<LLUICtrl>("name_form")->setValue(LLSD(name_string));
    }

    LLPanelSnapshot::onOpen(key);
}

// virtual
void LLPanelSnapshotPostcard::updateControls(const LLSD& info)
{
    getChild<LLUICtrl>("image_quality_slider")->setValue(gSavedSettings.getS32("SnapshotQuality"));
    updateImageQualityLevel();

    const bool have_snapshot = info.has("have-snapshot") ? info["have-snapshot"].asBoolean() : true;
    getChild<LLUICtrl>("send_btn")->setEnabled(have_snapshot);
}

bool LLPanelSnapshotPostcard::missingSubjMsgAlertCallback(const LLSD& notification, const LLSD& response)
{
    S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
    if(0 == option)
    {
        // User clicked OK
        if((getChild<LLUICtrl>("subject_form")->getValue().asString()).empty())
        {
            // Stuff the subject back into the form.
            getChild<LLUICtrl>("subject_form")->setValue(getString("default_subject"));
        }

        if (!mHasFirstMsgFocus)
        {
            // The user never switched focus to the message window.
            // Using the default string.
            getChild<LLUICtrl>("msg_form")->setValue(getString("default_message"));
        }

        sendPostcard();
    }
    return false;
}


void LLPanelSnapshotPostcard::sendPostcardFinished(LLSD result)
{
    LL_WARNS() << result << LL_ENDL;

    std::string state = result["state"].asString();

    LLPostCard::reportPostResult((state == "complete"));
}


void LLPanelSnapshotPostcard::sendPostcard()
{
    if (!gAgent.getRegion()) return;

    // upload the image
    std::string url = gAgent.getRegion()->getCapability("SendPostcard");
    if (!url.empty())
    {
        LLResourceUploadInfo::ptr_t uploadInfo(std::make_shared<LLPostcardUploadInfo>(
            getChild<LLUICtrl>("name_form")->getValue().asString(),
            getChild<LLUICtrl>("to_form")->getValue().asString(),
            getChild<LLUICtrl>("subject_form")->getValue().asString(),
            getChild<LLUICtrl>("msg_form")->getValue().asString(),
            mSnapshotFloater->getPosTakenGlobal(),
            mSnapshotFloater->getImageData(),
            [](LLUUID, LLUUID, LLUUID, LLSD response) {
                LLPanelSnapshotPostcard::sendPostcardFinished(response);
            }));

        LLViewerAssetUpload::EnqueueInventoryUpload(url, uploadInfo);
    }
    else
    {
        LL_WARNS() << "Postcards unavailable in this region." << LL_ENDL;
    }


    // Give user feedback of the event.
    gViewerWindow->playSnapshotAnimAndSound();

    mSnapshotFloater->postSave();
}

void LLPanelSnapshotPostcard::onMsgFormFocusRecieved()
{
    LLTextEditor* msg_form = getChild<LLTextEditor>("msg_form");
    if (msg_form->hasFocus() && !mHasFirstMsgFocus)
    {
        mHasFirstMsgFocus = true;
        msg_form->setText(LLStringUtil::null);
    }
}

void LLPanelSnapshotPostcard::onFormatComboCommit(LLUICtrl* ctrl)
{
    // will call updateControls()
    LLFloaterSnapshot::getInstance()->notify(LLSD().with("image-format-change", true));
}

void LLPanelSnapshotPostcard::onQualitySliderCommit(LLUICtrl* ctrl)
{
    updateImageQualityLevel();

    LLSliderCtrl* slider = (LLSliderCtrl*)ctrl;
    S32 quality_val = llfloor((F32)slider->getValue().asReal());
    LLSD info;
    info["image-quality-change"] = quality_val;
    LLFloaterSnapshot::getInstance()->notify(info); // updates the "SnapshotQuality" setting
}

void LLPanelSnapshotPostcard::onSend()
{
    // Validate input.
    std::string to(getChild<LLUICtrl>("to_form")->getValue().asString());

    boost::regex email_format("[A-Za-z0-9.%+-_]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}(,[ \t]*[A-Za-z0-9.%+-_]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,})*");

    if (to.empty() || !ll_regex_match(to, email_format))
    {
        LLNotificationsUtil::add("PromptRecipientEmail");
        return;
    }

    std::string subject(getChild<LLUICtrl>("subject_form")->getValue().asString());
    if(subject.empty() || !mHasFirstMsgFocus)
    {
        LLNotificationsUtil::add("PromptMissingSubjMsg", LLSD(), LLSD(), boost::bind(&LLPanelSnapshotPostcard::missingSubjMsgAlertCallback, this, _1, _2));
        return;
    }

    // Send postcard.
    sendPostcard();
}

LLSnapshotModel::ESnapshotType LLPanelSnapshotPostcard::getSnapshotType()
{
    return LLSnapshotModel::SNAPSHOT_POSTCARD;
}