local chatLineArr = [];
local chatNameArr = [];

local curSwitch = 0;

local chatMaxLines = 15;

local chatShowed = true;

local g_chatX = 5;
local g_chatY = 5;
chatInputSetPosition(g_chatX,g_chatY);

function newChatLine(name,text,n_r,n_g,n_b,r,g,b)
{
    if (chatLineArr.len() == 60)
    {
        drawDestroy(chatNameArr[0]);
        drawDestroy(chatLineArr[0]);
        chatNameArr.remove(0);
        chatLineArr.remove(0);
    }
    if (name != "")
    {
        chatNameArr.push(drawCreatePx(g_chatX,g_chatY,n_r,n_g,n_b,"Font_Old_10_White.TGA",name + ": "));
    }
    else
    {
        chatNameArr.push(drawCreatePx(g_chatX,g_chatY,n_r,n_g,n_b,"Font_Old_10_White.TGA",""));
    }
    chatLineArr.push(drawCreatePx(g_chatX + (drawGetWidthPx(chatNameArr[chatNameArr.len() - 1]) + 1),g_chatY,r,g,b,"Font_Old_10_White_Hi.TGA",text));
    if (chatLineArr.len() >= chatMaxLines && (curSwitch - (chatLineArr.len() - chatMaxLines) == 1 || (chatLineArr.len() - chatMaxLines) - curSwitch == 1))
    {
        curSwitch = (chatLineArr.len() - chatMaxLines);
    }
}

function chatUpdate()
{
    local curline = 0;
    if (chatShowed == true)
    {
        if (chatLineArr.len() != 0)
        {
            for (local i = 0; i < chatLineArr.len(); ++ i)
            {
                drawSetVisible(chatLineArr[i],false);
                drawSetVisible(chatNameArr[i],false);
            }
            if (chatLineArr.len() > chatMaxLines)
            {
                for (local j = curSwitch; j < (curSwitch + chatMaxLines); ++j)
                {
                    drawSetVisible(chatLineArr[j],true);
                    drawSetVisible(chatNameArr[j],true);
                    drawSetPositionPx(chatNameArr[j],g_chatX,g_chatY + (drawGetHeightPx(chatNameArr[j]) * curline));
                    local pos = drawGetPositionPx(chatLineArr[j]);
                    drawSetPositionPx(chatLineArr[j],pos.x,g_chatY +(drawGetHeightPx(chatNameArr[j]) * curline));
                    curline += 1;
                }
            }
            else
            {
                for (local j = curSwitch; j < chatLineArr.len(); ++j)
                {
                    drawSetVisible(chatLineArr[j],true);
                    drawSetVisible(chatNameArr[j],true);
                    drawSetPositionPx(chatNameArr[j],g_chatX,g_chatY + (drawGetHeightPx(chatNameArr[j]) * curline));
                    local pos = drawGetPositionPx(chatLineArr[j]);
                    drawSetPositionPx(chatLineArr[j],pos.x,g_chatY +(drawGetHeightPx(chatNameArr[j]) * curline));
                    curline += 1;
                }
            }
            local position = drawGetPosition(chatNameArr[chatNameArr.len() - 1]);
            chatInputSetPosition(g_chatX + 10,position.y + drawGetHeight(chatNameArr[chatNameArr.len() - 1]))
            print("" + position.y + drawGetHeight(chatNameArr[chatNameArr.len() - 1]));
        }
    }
}

function chatSwitch(side)
{
    if (side == 0)
    {
        if (chatLineArr.len() > chatMaxLines)
        {
            if ((curSwitch - 1) >= 0)
            {
                curSwitch-=1;
                chatUpdate();
            }
        }
    }
    else if (side == 1)
    {
        if (chatLineArr.len() > chatMaxLines)
        {
            if (chatLineArr.len() < 60)
            {
                if ((curSwitch + 1) <= (chatLineArr.len() - chatMaxLines))
                {
                    curSwitch+=1;
                    chatUpdate();
                }
            }
            else
            {
                if ((curSwitch + 1) <= (60 - chatMaxLines))
                {
                    curSwitch+=1;
                    chatUpdate();
                }
            };
        }
    }
    else if (side == 2)
    {
        curSwitch = 0;
        chatUpdate();
    }
    else if (side == 3)
    {
        if (chatLineArr.len() > chatMaxLines)
        {
            curSwitch = (chatLineArr.len() - chatMaxLines);
            chatUpdate();
        };
    }
}

function playerMsg(name,text,r,g,b)
{
    newChatLine(name,text,r,g,b,255,255,255);
    chatUpdate();
}

function serverMsg(text,r,g,b)
{
    newChatLine("",text,255,255,255,r,g,b);
    chatUpdate();
}

function sendPlayerMessage(id,sender_id,text)
{
    if (heroId == id)
    {
        local color = getPlayerColor(sender_id);
        playerMsg(getPlayerName(sender_id),text,color.r,color.g,color.b);
    }
}

function clearChat()
{
    if (chatLineArr.len() != 0)
    {
        for (local i = 0; i < chatLineArr.len(); ++i)
        {
            drawDestroy(chatLineArr[i]);
            drawDestroy(chatNameArr[i]);
        };
    };
    chatLineArr.clear();
    chatNameArr.clear();
    curSwitch = 0;
    chatInputSetPosition(g_chatX,g_chatY);
}

function chatVisible(toggle)
{
    if (toggle == true)
    {
        if (chatShowed == false)
        {
            chatShowed = true;
            if (chatLineArr.len() != 0)
            {
                for (local i = 0; i < chatLineArr.len(); ++i)
                {
                    drawSetVisible(chatLineArr[i],true);
                    drawSetVisible(chatNameArr[i],true);
                    chatUpdate();
                };
            };
        }
    }
    else if (toggle == false)
    {
        if (chatShowed == true)
        {
            chatShowed = false;
            if (chatLineArr.len() != 0)
            {
                for (local i = 0; i < chatLineArr.len(); ++i)
                {
                    drawSetVisible(chatLineArr[i],false);
                    drawSetVisible(chatNameArr[i],false);
                };
            };
        }
    }
}

function chatIsVisible()
{
    return chatShowed;
}


function sendMessage(id,text,r,g,b)
{
    if (heroId == id)
    {
        serverMsg(text,r,g,b);
    }
}

function setChatMaxLines(lines)
{
    if (lines >= 5 && lines <= 30)
    {
        chatMaxLines = lines;
        chatUpdate();
    }
}

function getChatMaxLines()
{
    return chatMaxLines;
}

function key(key)
{
    if (key == KEY_T)
    {
        if (!chatInputIsOpen())
        {
            chatInputOpen();
        }
    }
    else if (key == KEY_RETURN)
    {
        if(chatInputIsOpen())
        {
            sendPlayerMessage(heroId,heroId,chatInputGetText());
            chatInputSend();
            chatInputClear();
            chatInputClose();
        }
    }
    else if (key == KEY_ESCAPE)
    {
        if (chatInputIsOpen())
        {
            chatInputClear();
            chatInputClose();
        }
    }
    else if (key == KEY_UP)
    {
        if (chatInputIsOpen())
        {
            chatSwitch(0);
        }
    }
    else if (key == KEY_DOWN)
    {
        if (chatInputIsOpen())
        {
            chatSwitch(1);
        }
    }
    else if (key == KEY_HOME)
    {
        if (chatInputIsOpen())
        {
            chatSwitch(2);
        }
    }
    else if (key == KEY_END)
    {
        if (chatInputIsOpen())
        {
            chatSwitch(3);
        }
    }
}

addEventHandler("onKey",key);