bufferAPI = {}
bufferAPI.term = _G.term

-- Colour Manager

bufferAPI.colour = {}
bufferAPI.colour.tohex = {[1] = "0",[2] = "1",[4] = "2",[8] = "3",[16] = "4",[32] = "5",[64] = "6",[128] = "7",[256] = "8",[512] = "9",[1024] = "a",[2048] = "b",[4098] = "c",[8192] = "d",[16384] = "e",[32768] = "f"}
bufferAPI.colour.todec = {}
for i,k in pairs(bufferAPI.colour.tohex) do
    bufferAPI.colour.todec[k] = i
end
-- Buffer Manager

bufferAPI.buffer = {}
bufferAPI.buffer.textColour = bufferAPI.colour.tohex[term.getTextColour()]
bufferAPI.buffer.backColour = bufferAPI.colour.tohex[term.getBackgroundColour()]
bufferAPI.buffer.cursorX = 1
bufferAPI.buffer.cursorY = 1
bufferAPI.buffer.width , bufferAPI.buffer.height = term.getSize()

-- Default Term
function bufferAPI.getCursorPos()
    return bufferAPI.buffer.cursorX , bufferAPI.buffer.cursorY
end

function bufferAPI.current()
    return bufferAPI
end

function bufferAPI.getBackgroundColour()
    return bufferAPI.buffer.backColour
end

function bufferAPI.getTextColour()
    return bufferAPI.buffer.textColour
end

function bufferAPI.scroll(nA)
--WIP
end

function bufferAPI.redirect(tT)
    return bufferAPI.term.redirect(tT)
end

function bufferAPI.setTextColour(nC)
    if type(nC) == "number" then
        bufferAPI.buffer.textColour = bufferAPI.colour.tohex[nC]
        return bufferAPI.term.setTextColour(nC)
    elseif type(nC) == "string" then
        bufferAPI.buffer.textColour = nC
        return bufferAPI.term.setTextColour(bufferAPI.colour.todec[nC])
    end
end

function bufferAPI.native()
    return bufferAPI.term.native
end

function bufferAPI.getSize()
    return bufferAPI.buffer.width , bufferAPI.buffer.height
end

function bufferAPI.write(sText)
    for i=1,#sText do
        if bufferAPI.main[bufferAPI.buffer.cursorY][bufferAPI.buffer.cursorX+i-1] then
            bufferAPI.main[bufferAPI.buffer.cursorY][bufferAPI.buffer.cursorX+i-1] = bufferAPI.buffer.textColour .. bufferAPI.buffer.backColour .. sText:sub(i,i)
        end
    end
    bufferAPI.buffer.cursorX = bufferAPI.buffer.cursorX + #sText
    return bufferAPI.term.write(sText)
end


function bufferAPI.setCursorPos(nX,nY)
    bufferAPI.buffer.cursorX = nX
    bufferAPI.buffer.cursorY = nY
    return bufferAPI.term.setCursorPos(nX,nY)
end

function bufferAPI.clear()
    for y=1,bufferAPI.buffer.height do
        bufferAPI.main[y] = {}
        for x=1,bufferAPI.buffer.width do
            bufferAPI.main[y][x] = bufferAPI.buffer.textColour .. bufferAPI.buffer.backColour .. " "
        end
    end
end

function bufferAPI.setCursorBlink(bA)
    return bufferAPI.term.setCursorBlink(bA)
end

function bufferAPI.blit(sText,sTextC,sBackC)
    if not ((#sTextC == #sText) and (#sBackC == #sTextC)) then
        error("Arguments must be the same length")
    end
    for i=1,#sText do
        if bufferAPI.main[bufferAPI.buffer.cursorY][bufferAPI.buffer.cursorX+i-1] then
            bufferAPI.main[bufferAPI.buffer.cursorY][bufferAPI.buffer.cursorX+i-1] = sTextC:sub(i,i) .. sTextB:sub(i,i) .. sText:sub(i,i)
        end
    end
    bufferAPI.buffer.cursorX = bufferAPI.buffer.cursorX + #sText
    return bufferAPI.term.blit(sText,sTextC,sBackC)
end

function bufferAPI.setBackgroundColour(nC)
    if type(nC) == "number" then
        bufferAPI.buffer.backColour = bufferAPI.colour.tohex[nC]
        return bufferAPI.term.setBackgroundColour(nC)
    elseif type(nC) == "string" then
        bufferAPI.buffer.backColour = nC
        return bufferAPI.term.setBackgroundColour(bufferAPI.colour.todec[nC])
    end
end

function bufferAPI.clearLine()
    for x=1,bufferAPI.buffer.width do
        bufferAPI.main[bufferAPI.buffer.cursorY][x] = bufferAPI.buffer.textColour .. bufferAPI.buffer.backColour .. " "
    end
    return buffer.term.clearLine()
end

function bufferAPI.isColour()
    return buffer.term.isColour()
end

bufferAPI.isColor = bufferAPI.isColour
bufferAPI.setTextColor = bufferAPI.setTextColour
bufferAPI.getTextColor = bufferAPI.getTextColor
bufferAPI.setBackgroundColor = bufferAPI.setBackgroundColour
bufferAPI.getBackgroundColor = bufferAPI.getBackgroundColor

-- Generation
bufferAPI.main = {}
for y=1,bufferAPI.buffer.height do
    bufferAPI.main[y] = {}
    for x=1,bufferAPI.buffer.width do
        bufferAPI.main[y][x] = bufferAPI.buffer.textColour .. bufferAPI.buffer.backColour .. " "
    end
end