local scriptName = "landfill"
local args = {...}

if #args < 3 then
    print("Usage: " .. scriptName .. " <width> <depth> <channel>")
    return
end

local WIDTH = tonumber(args[1])
local DEPTH = tonumber(args[2])
local CHANNEL = args[3]

dofile("turtle_bot")

if not COLOR_CHANNELS[CHANNEL] then
    print(CHANNEL .. " is not a valid color channel.")
    return
end


local t = TurtleBot.new(scriptName, "North")
t:connect()

local function selectBlocks()
    for _, v in pairs(t:inventory()) do
        if v.name ~= ITEMS.enderChest.name then
            turtle.select(v.slot)
            break
        end
    end
end


local function place(direction)
    local placeFunc = turtle.place
    if direction == "up" then
        placeFunc = turtle.placeUp
    elseif direction == "down" then
        placeFunc = turtle.placeDown
    end

    selectBlocks()
    placeFunc()
end


local function collectBlocks()
    for i=1, 2 do
        t:enderCollect(COLOR_CHANNELS[CHANNEL], 64)
    end
    t:dig("up")
end


local function fill()
    local y = 0
    while t:down() do
        y = y + 1
        sleep(.5)
    end

    for _ = 1, y do
        t:up()
        place("down")
    end
end


local function traverseRow(steps)
    for _ = 1, steps do
        local inventory = t:inventory()
        if #inventory < 2 then
            collectBlocks()
        end
        fill()
        t:enderRefuel(2000, 5000, ITEMS.charcoal)
        t:dig("up")
        sleep(.5)
        t:forward()
    end
end


local function main()
    for w = 1, WIDTH do
        traverseRow(DEPTH - 1)
        if w ~= WIDTH then
            if w % 2 == 1 then
                t:right()
                traverseRow(1)
                t:right()
            else
                t:left()
                traverseRow(1)
                t:left()
            end
        end
    end
    if WIDTH % 2 == 0 then
        t:right()
        t:right()
        traverseRow(WIDTH - 1)
        t:right()
        t:right()
    end
end

t:execute(main)