os.loadAPI("gcapi")

existsMonitor = false
if peripheral.find("monitor") then
    os.loadAPI("nMon")
    existsMonitor = true
end

--peripheral.find() in Tekkit
function findPeripheral(pType)
    pList = {}
    for _,pName in pairs(peripheral.getNames()) do
        if peripheral.getType(pName) == pType then
            table.insert(pList, peripheral.wrap(pName))
        end
    end
    return unpack(pList)
end
peripheral.find = findPeripheral

--Split string
function split(self, delimiter)
    result = {};
    for match in (self..delimiter):gmatch("(.-)"..delimiter) do
        table.insert(result, match);
    end
    return result;
end
string.split = split
--------------------------------------------------------
-->                       MUSIC                      <--
--------------------------------------------------------
local pitchs = {[0]=0, [1]=0.53, [2]=0.56, [3]=0.6, [4]=0.63, [5]=0.67, [6]=0.7, [7]=0.75,
[8]=0.8,[9]=0.85,[10]=0.9,[11]=0.95,[12]=1,[13]=1.05,[14]=1.1,[15]=1.2,[16]=1.25,[17]=1.32,[18]=1.4,
[19]=1.5,[20]=1.6,[21]=1.7,[22]=1.8,[23]=1.9,[24]=2}

local instruments = {[1]="note.harp",[2]="note.bassattack",[3]="note.bd",[4]="note.snare",[5]="note.hat"}

local song = nil

local noteblocks = {peripheral.find("music")}

function playNote(instrument, pitch, vol)
    if instrument and pitch and vol then
        for _,noteblock in pairs(noteblocks) do
            noteblock.playSound(instrument, pitch, vol)
        end
    end
end

--------------------------------------------------------
-->                  Main programs                   <--
--------------------------------------------------------

function startSong()
    local delay = song["delay"]
    for i,tick in ipairs(song) do
        if existsMonitor then
            nMon.updateMonitor(i)
        end
        for instrumentID, notePitchs in pairs(tick) do
            for _,pitchID in pairs(notePitchs) do
                playNote(instruments[instrumentID], pitchs[pitchID], 0.7)
            end
        end
        sleep(delay)
    end
end

function clearTerminal()
    term.setCursorPos(1,1)
    term.clear()
end

if existsMonitor then
    nMon.setupMonitor()
end

userInput = ''
while true do
    clearTerminal()
    print("= List of songs To Be Added!")

    write("Song name: ")
    if not arepeat then
        userInput = read()
    end

    listC = gcapi.split((userInput .. ' '), ' ')

    if table.contains(listC , '-r' ) then
        arepeat = true
    end

    if userInput then
        filePath = "/songs/" .. string.split(userInput .. " ", " ")[1]
        print()

        if filePath and fs.exists(filePath) then
            file = fs.open(filePath, "r")
            song = textutils.unserialize(file.readAll())
            file.close()
            if existsMonitor then
                nMon.setSong(song)
            end
            startSong()
        else
            print("Song not found")
            sleep(2)
        end
    end
end