#include "PrecompiledHeader.h"

#include "TextScroller.h"
#include "WResourceManager.h"
#include "utils.h"
#include "WFont.h"

enum
{
    HORIZONTAL_SCROLLER = 0, VERTICAL_SCROLLER = 1
};

TextScroller::TextScroller(int fontId, float x, float y, float width, float speed, int scrollerType, size_t numItems) :
    JGuiObject(0), fontId(fontId)
{
    mWidth = width;
    mSpeed = speed;
    minimumItems = numItems;
    mX = x;
    mY = y;
    start = -width;
    timer = 0;
    currentId = 0;
    mRandom = 0;
    scrollDirection = scrollerType;
}

void TextScroller::setRandom(int mode)
{
    mRandom = mode;
    if (mRandom && strings.size())
    {
        currentId = (rand() % strings.size());
        mText = strings[currentId];
    }
}

void TextScroller::Add(string text)
{
    if (!strings.size()) mText = text;
    strings.push_back(text);
}

void TextScroller::Reset()
{
    strings.clear();
    currentId = 0;
}

void TextScroller::Update(float dt)
{
    if (!strings.size()) return;
    if (scrollDirection == HORIZONTAL_SCROLLER)
    {
        start += mSpeed * dt;
        WFont * mFont = resources.GetWFont(fontId);
        if (start > mFont->GetStringWidth(mText.c_str()))
        {
            start = -mWidth;
            if (mRandom)
            {
                currentId = (rand() % strings.size());
            }
            else
            {
                currentId++;
                if (currentId >= strings.size()) currentId = 0;
            }
            mText = strings[currentId];
        }
    }
    else
    {
        // we want to display 2 at a time
        ostringstream scrollerText;
        if (timer == 0)
        {
            size_t nbItemsToDisplay = (minimumItems < strings.size() ? minimumItems : strings.size());
            for (size_t idx = 0; idx < nbItemsToDisplay; ++idx)
            {
                size_t index = (currentId + idx) % strings.size();
                scrollerText << strings[index];
            }
            currentId++;
            if (currentId >= strings.size()) currentId = 0;
            mText = wordWrap(scrollerText.str(), (int) mWidth);
        }
        timer = ++timer % ((int) mSpeed);
    }
}

void TextScroller::Render()
{
    WFont * mFont = resources.GetWFont(fontId);
    if (scrollDirection == HORIZONTAL_SCROLLER)
        mFont->DrawString(mText.c_str(), mX, mY, JGETEXT_LEFT, start, mWidth);
    else
        mFont->DrawString(mText.c_str(), mX, mY);
}

ostream& TextScroller::toString(ostream& out) const
{
    return out << "TextScroller ::: mText : " << mText << " ; tempText : " << tempText << " ; mWidth : " << mWidth
                    << " ; mSpeed : " << mSpeed << " ; mX,mY : " << mX << "," << mY << " ; start : " << start << " ; timer : "
                    << timer << " ; strings : ?" // << strings
                    << " ; currentId : " << currentId << " ; mRandom : " << mRandom;
}