_G.requireInjector(_ENV)

local Point = require('point')
local Util  = require('util')

local scanner = device['plethora:scanner'] or error('Plethora scanner required')

local crops = {
  ['minecraft:wheat'] =
    { seed = 'minecraft:wheat_seeds', mature = 7 },
  ['minecraft:carrots'] =
    { seed = 'minecraft:carrot', mature = 7 },
  ['minecraft:potatoes'] =
    { seed = 'minecraft:potato', mature = 7 },
  ['minecraft:beetroots'] =
    { seed = 'minecraft:beetroot_seeds', mature = 3 },
}

local function scan()
  local blocks = scanner.scan()
  Util.filterInplace(blocks, function(v)
    if v.name == 'minecraft:reeds' then
      return v.y == 0
    end
    return crops[v.name] and
      scanner.getBlockMeta(v.x, v.y, v.z).metadata == crops[v.name].mature
    end)
  
  return blocks
end

local function harvest(blocks)
  Point.eachClosest(turtle.point, blocks, function(b)
    Util.print(b)
    if b.name == 'minecraft:reeds' then
      turtle.goto(b)
    else
      turtle.goto(Point.above(b))
      turtle.digDown()
      turtle.placeDown(crops[b.name].seed)
      turtle.select(1)
    end
  end)
end

turtle.reset()
local directions = { [5] = 2, [3] = 3, [4] = 0, [2] = 1, }
turtle.placeUp('minecraft:chest') or error('Missing chest')
local _, bi = turtle.inspectUp()
turtle.digUp()
turtle.point.heading = directions[bi.metadata]

turtle.setPolicy('digOnly')

while true do
  print('scanning')
  local blocks = scan()
  turtle.setPoint({ x = 0, y = 0, z = 0, heading = turtle.point.heading })
  harvest(blocks)
  print('sleeping')
  os.sleep(10)
end