term.clear()


function writeln(text)
    a, b = term.getCursorPosition()
    if text == nil then
        text = ""
    end
    write(text)
    c, b = term.getCursorPosition()
    term.setCursorPosition(c, b + 1)
end

function getPos()
    x, y, z = gps.locate(1)
    if x == nil then
        writeln("please enter coordinates, where drone is in, by x, y, z seperated by enters")
        x = io.read()
        y = io.read()
        z = io.read()
        writeln()

        writeln("your enterd coordinates are:")
        write(x)
        write(", ")
        write(y)
        write(", ")
        write(z)
        writeln()
        writeln("press enter to continue")
        io.read()
        term.clear
    end
    return x, y, z
end

function dropInvDown()
    tmp = turtle.getSelectedSlot()
    for i = 1, 16, 1 do
        turtle.select(i)
        turtle.dropDown()
    turtle.select(tmp)
end

function mineSquare(wid, len, currentHeight,yStart)
    for i = 0, len, 1 do
        for i1 = 0, wid, 1 do
            tmp = turtle.getSelectedSlot()
            turtle.select(16)
            if turtle.getItemCount() != 0 do
                heightdif = yStart - currentHeight
                while(counter5000 = heightdif != 0) do
                    turtle.up()
                    counter5000 - 1
                end

                turtle.turnLeft()
                turtle.turnLeft()
                i2 = 0
                while(i2 != i1) do
                    turtle.forward()
                    i2 + 1
                end
                i2 = 0
                turtle.turnRight
                while(i2 != i) do
                    turtle.forward()
                    i2 + 1
                end
                turtle.turnLeft()
                turtle.forward()
                turtle.turnLeft()
                turtle.turnLeft()

                dropInvDown()
                turtle.forward()

                i2 = 0
                while(i2 != i1) do
                    turtle.forward()
                    i2 + 1
                end
                i2 = 0
                turtle.turnRight
                while(i2 != i) do
                    turtle.forward()
                    i2 + 1
                end
                i2 = 0

                while(counter5000 = heightdif != 0) do
                    turtle.down()
                    counter5000 - 1
                end

                turtle.turnLeft()
            end
            turtle.select(tmp)

            if turtle.detect() do
                turtle.dig()
            end
            turtle.select(16)
            if turtle.getItemCount() != 0 do
                turtle.turnLeft()
                turtle.turnLeft()
                i2 = 0
                while(i2 != i1) do
                    turtle.forward()
                    i2 + 1
                end
                i2 = 0
                turtle.turnRight
                while(i2 != i) do
                    turtle.forward()
                    i2 + 1
                end
                turtle.turnLeft()
                turtle.forward()
                turtle.turnLeft()
                turtle.turnLeft()

                dropInvDown()
                turtle.forward()

                i2 = 0
                while(i2 != i1) do
                    turtle.forward()
                    i2 + 1
                end
                i2 = 0
                turtle.turnRight
                while(i2 != i) do
                    turtle.forward()
                    i2 + 1
                end
                i2 = 0
                turtle.turnLeft()
            end
            turtle.select(tmp)
            turtle.forward()
            if wid == i1 do
                turtle.turnLeft()
                turtle.turnLeft()
                i2 = 0
                while(i2 != wid) do
                    turtle.forward()
                    i1 + 1
                end
                i2 = 0
                turtle.turnLeft()
                turtle.dig()
                turtle.forward()
                turtle.turnLeft()
            end
        end
    end

    turtle.turnLeft()
    turtle.turnLeft()
    i2 = 0
    while(i2 != len) do
        turtle.forward()
        i2 + 1
    end
    i2 = 0
    turtle.turnRight
    while(i2 != wid) do
        turtle.forward()
        i2 + 1
    end
    i2 = 0
    turtle.turnRight
end

function squareMining(xStart, yStart, zStart)
    writeln("Enter width and length seperated by enters")
    wid = io.read()
    len = io.read()
    currentHeight = yStart
    writeln("to start press enter")
    io.read()
    turtle.forward()

    mineSquare(wid, len, currentHeight, yStart)

    for currentHeight, 4, -1 do
        if turtle.detectDown() do
            turtle.digDown()
        end
        turtle.down()
        mineSquare(wid, len)
    end
end

function stripMining(xStart, yStart, zStart)
    writeln("not implemented yet")
end

function main()
    --implement check fuel
    turtle.refuel()

    dropInvDown()

    xStart, yStart, zStart = getPos()


    mode = 9
    while(mode != 0) do
        writeln("Press 1 & enter for square mining, press 2 & enter for strip mining and press 0 & enter to quit")
        mode = io.read()
        if input == 1 then
            term.clear()
            squareMining(xStart, yStart, zStart)
        elseif input == 2 then
            term.clear()
            stripMining(xStart, yStart, zStart)
        elseif input == 0 then
        else
            writeln("gz du bist retarded")
        end
    end
end

main()