/*---------------------------------------------------------------------------*
  Project:  Horizon
  File:     LogConsole.cpp

  Copyright 2009 Nintendo.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Rev$
 *---------------------------------------------------------------------------*/

#include "LogConsole.h"
#include <nn/nstd.h>

namespace common
{

const size_t FONT_WIDTH = 8;
const size_t FONT_HEIGHT = 10;

static LogConsole s_LogConsole;

LogConsole* GetConsoleInstance()
{
    return &s_LogConsole;
}

LogConsole::LogConsole()
{

}

LogConsole::~LogConsole()
{

}

void LogConsole::Initialize(u32 width, u32 height, u32 maxLine, demo::RenderSystemDrawing* renderSystem)
{
    m_Width = width;
    m_Height = height;
    m_MaxLine = maxLine;
    m_RenderSystem = renderSystem;
    m_CurrentViewLine = 0;
    m_LineNum = 0;
}

void LogConsole::AddText(const char* fmt, ::std::va_list arg)
{
    s32 stringSize;
    const size_t STRING_BUFFER_SIZE = 256;
    char formatStr[STRING_BUFFER_SIZE];

    stringSize = nn::nstd::TVSNPrintf(formatStr, sizeof(formatStr), fmt, arg);
    ::std::string str(formatStr);

    size_t addedText = 0;
    while (addedText < stringSize)
    {
        if(m_LineNum >= m_MaxLine)
        {
            // 満杯なので先頭を削除する
            ::std::vector<std::string>::iterator it;
            it = m_Log.begin();
            m_Log.erase(it);
            m_LineNum--;
        }

        // 部分文字列を追加
        AddWrapedText(str.substr(addedText, m_Width).c_str());
        m_LineNum++;

        // 画面領域以上追加したら末尾にスクロールする
        if(m_LineNum > m_Height)
        {
            ScrollToEnd();
        }


        if(stringSize - addedText > m_Width)
        {
            addedText += m_Width;
        }
        else
        {
            addedText += stringSize - addedText;
        }
    }
}

void LogConsole::ScrollUp()
{
    if(m_CurrentViewLine > 0)
    {
        m_CurrentViewLine--;
    }
}



void LogConsole::ScrollDown()
{
    if (m_LineNum > m_Height)
    {
        if (m_CurrentViewLine < m_LineNum - m_Height)
        {
            m_CurrentViewLine++;
        }

    }
}

void LogConsole::ScrollToBegin()
{
    m_CurrentViewLine = 0;
}

void LogConsole::ScrollToEnd()
{
    if(m_LineNum > m_Height)
    {
        m_CurrentViewLine = m_LineNum - m_Height;
    }
}


void LogConsole::Print()
{
    ::std::vector<std::string>::iterator it;

    it = m_Log.begin();
    it += m_CurrentViewLine;

    u32 count = 0;
    for(; it != m_Log.end() && count < m_Height && count < m_MaxLine; it++)
    {
        m_RenderSystem->DrawText(0, count++ * 10, "%s", it->c_str());
    }

    if(m_LineNum > m_Height)
    {
        DrawScrollBar();
    }
}


void LogConsole::AddWrapedText(const char* str)
{
    m_Log.push_back(::std::string(str));
}

void LogConsole::DrawScrollBar()
{
    m_RenderSystem->SetColor(0.4f, 0.4f, 0.4f);
    m_RenderSystem->DrawLine((m_Width + 1) * FONT_WIDTH, 0, (m_Width + 2) * FONT_WIDTH - 1, 0);
    m_RenderSystem->DrawLine((m_Width + 1)* FONT_WIDTH, 0, (m_Width + 1)* FONT_WIDTH, m_Height * FONT_HEIGHT);
    m_RenderSystem->DrawLine((m_Width + 2) * FONT_WIDTH - 1, 0, (m_Width  + 2) * FONT_WIDTH - 1, m_Height * FONT_HEIGHT);
    m_RenderSystem->DrawLine((m_Width + 1)* FONT_WIDTH, m_Height * FONT_HEIGHT - 1, (m_Width + 2) * FONT_WIDTH - 1, m_Height * FONT_HEIGHT - 1);

    u32 y = (m_Height * FONT_HEIGHT - 2) * m_CurrentViewLine / m_MaxLine;
    m_RenderSystem->SetColor(0.7f, 0.7f, 0.7f);
    m_RenderSystem->FillRectangle((m_Width + 1) * FONT_WIDTH, y + 1, FONT_WIDTH - 1, FONT_HEIGHT - 4);

    m_RenderSystem->SetColor(1.f, 1.f, 1.f);
}

} //namespace ConsoleBackup