-- DEFAULTS TO TURNING TURTLE NORTH ( Z - AXIS )
function faceNorth()
    local startX, startY, startZ = gps.locate()
    startY = nil
    turtle.back()
    local endX, endY, endZ = gps.locate()
    endY = nil
    turtle.forward()
    if(endX < startX) then turtle.turnLeft()
    elseif (endX > startX) then turtle.turnRight()
    elseif (endZ < startZ) then turtle.turnRight() turtle.turnRight()
    end
end

-- MOVES TO COORDINATES X, Y, Z
function moveTo(x, y, z)
    faceNorth()
    local curX, curY, curZ = gps.locate()
    local xDist = math.abs(x - curX)
    local yDist = math.abs(y - curY)
    local zDist = math.abs(z - curZ)
    local xMethod local yMethod local zMethod
    if (curX > x) then xMethod = turtle.back else xMethod = turtle.forward end
    if (curY > y) then yMethod = turtle.down else yMethod = turtle.up end
    if (curZ > z) then zMethod = turtle.back else zMethod = turtle.forward end

    while (zDist > 0) do
        zMethod()
        zDist = zDist - 1
    end
    turtle.turnLeft()
    while (xDist > 0) do
        xMethod()
        xDist = xDist - 1
    end
    while (yDist > 0) do
        yMethod()
        yDist = yDist - 1
    end
end

function resetPos()
    local file = fs.open("Settings", "r")
    local startX = file.readLine()
    local startY = file.readLine()
    local startZ = file.readLine()
    file.close()
    moveTo(startX, startY, startZ)
end

function getSeedIndex()
    for slot = 1, 16, 1 do
        local item = turtle.getItemDetail(slot)
        if ( (item ~= nil) and ( (string.match(item.name, "seed") ) or (string.match(item.name, "potato") ) or (string.match(item.name, "carrot") ) ) ) then
            return slot
        end
    end
end

function getCrop()
    local isBlock, data = turtle.inspectDown()
    if(isBlock)then
        if ( ( string.match(data.name, "croptopia:") or string.match(data.name, "wheat") or string.match(data.name, "potato") or string.match(data.name, "carrot")) and data['state']['age'] == 7) then
            turtle.digDown()
            seedIndex = getSeedIndex()
            if(seedIndex ~= nil) then
                turtle.select(seedIndex)
                turtle.placeDown()
            end
        end
    else
        seedIndex = getSeedIndex()
        if(seedIndex ~= nil) then
            turtle.digDown()
            turtle.select(seedIndex)
            turtle.placeDown()
        end
    end
end