planter

local ms = require("movescript")
local robot = require("robot")
local component = require("component")
local ic = component.inventory_controller

local function equipItemOrWait(name)
  repeat
    local success = ms.selectItem(name)
    if not success then
      print("Please add more " .. name .. ", then press enter.")
      io.read()
    end
  until success
  ic.equip()
end

local function goToNextSpot()
  equipItemOrWait("pickaxe")
  while robot.detect() do
    ms.exec("d_U")
  end
  ms.exec("F")
  while not robot.detectDown() do
    ms.exec("d_D")
  end
  ms.exec("d_U")
end

local function plantSpot(cropName)
  repeat
    equipItemOrWait("hoe")
    robot.useDown()
    equipItemOrWait(cropName)
    local success = robot.useDown()
  until success
end

local function plantArea(length, width, cropName)
  goToNextSpot()
  plantSpot(cropName)
  ms.exec("R")
  for row = 1, length do
    for col = 1, width - 1 do
      goToNextSpot()
      plantSpot(cropName)
    end
    if row % 2 == 1 then
      ms.exec("L")
    else
      ms.exec("R")
    end
    if row ~= length then
      goToNextSpot()
      plantSpot(cropName)
    end
    if row % 2 == 1 then
      ms.exec("L")
    else
      ms.exec("R")
    end
    print("Completed row " .. row .. " of " .. length)
  end
end


local args = {...}

local length = tonumber(args[1])
local width = tonumber(args[2])
local cropName = args[3]
if not length or not width or not cropName then
  error("Invalid args.")
end
print("Planting an area " .. length .. " by " .. width .. " with " .. cropName .. ".")
plantArea(length, width, cropName)