#include "list.hpp"

#include <MyGUI.h>

using namespace MWGui;
using namespace MWGui::Widgets;

MWList::MWList() :
    mClient(0)
    , mScrollView(0)
    , mItemHeight(0)
{
}

void MWList::initialiseOverride()
{
    Base::initialiseOverride();

    assignWidget(mClient, "Client");
    if (mClient == 0)
        mClient = this;

    mScrollView = mClient->createWidgetReal<MyGUI::ScrollView>(
        "MW_ScrollView", MyGUI::FloatCoord(0.0, 0.0, 1.0, 1.0),
        MyGUI::Align::Top | MyGUI::Align::Left | MyGUI::Align::Stretch, getName() + "_ScrollView");
}

void MWList::addItem(const std::string& name)
{
    mItems.push_back(name);
}

void MWList::addSeparator()
{
    mItems.push_back("");
}

void MWList::adjustSize()
{
    redraw();
}

void MWList::redraw(bool scrollbarShown)
{
    const int _scrollBarWidth = 24; // fetch this from skin?
    const int scrollBarWidth = scrollbarShown ? _scrollBarWidth : 0;
    const int spacing = 3;

    while (mScrollView->getChildCount())
    {
        MyGUI::Gui::getInstance().destroyWidget(mScrollView->getChildAt(0));
    }

    mItemHeight = 0;
    for (std::vector<std::string>::const_iterator it=mItems.begin();
        it!=mItems.end(); ++it)
    {
        if (*it != "")
        {
            MyGUI::Button* button = mScrollView->createWidget<MyGUI::Button>(
                "MW_ListLine", MyGUI::IntCoord(0, mItemHeight, mScrollView->getSize().width - scrollBarWidth - 2, 24),
                MyGUI::Align::Left | MyGUI::Align::Top, getName() + "_item_" + (*it));
            button->setCaption((*it));
            button->getSubWidgetText()->setWordWrap(true);
            button->getSubWidgetText()->setTextAlign(MyGUI::Align::Left);
            button->eventMouseWheel += MyGUI::newDelegate(this, &MWList::onMouseWheel);
            button->eventMouseButtonClick += MyGUI::newDelegate(this, &MWList::onItemSelected);

            int height = button->getTextSize().height;
            button->setSize(MyGUI::IntSize(button->getSize().width, height));

            mItemHeight += height + spacing;
        }
        else
        {
            MyGUI::ImageBox* separator = mScrollView->createWidget<MyGUI::ImageBox>("MW_HLine",
                MyGUI::IntCoord(2, mItemHeight, mScrollView->getWidth()-4, 18),
                MyGUI::Align::Left | MyGUI::Align::Top | MyGUI::Align::HStretch);
            separator->setNeedMouseFocus(false);

            mItemHeight += 18 + spacing;
        }
    }
    mScrollView->setCanvasSize(mClient->getSize().width + (_scrollBarWidth-scrollBarWidth), std::max(mItemHeight, mClient->getSize().height));

    if (!scrollbarShown && mItemHeight > mClient->getSize().height)
        redraw(true);
}

bool MWList::hasItem(const std::string& name)
{
    return (std::find(mItems.begin(), mItems.end(), name) != mItems.end());
}

unsigned int MWList::getItemCount()
{
    return mItems.size();
}

std::string MWList::getItemNameAt(unsigned int at)
{
    assert(at < mItems.size() && "List item out of bounds");
    return mItems[at];
}

void MWList::removeItem(const std::string& name)
{
    assert( std::find(mItems.begin(), mItems.end(), name) != mItems.end() );
    mItems.erase( std::find(mItems.begin(), mItems.end(), name) );
}

void MWList::clear()
{
    mItems.clear();
}

void MWList::onMouseWheel(MyGUI::Widget* _sender, int _rel)
{
    //NB view offset is negative
    if (mScrollView->getViewOffset().top + _rel*0.3 > 0)
        mScrollView->setViewOffset(MyGUI::IntPoint(0, 0));
    else
        mScrollView->setViewOffset(MyGUI::IntPoint(0, mScrollView->getViewOffset().top + _rel*0.3));
}

void MWList::onItemSelected(MyGUI::Widget* _sender)
{
    std::string name = static_cast<MyGUI::Button*>(_sender)->getCaption();

    eventItemSelected(name);
}
