--block in front of turtle at beginning is bottom left corner
--when viewed from above
-- 1 = Wall
-- 2 = Roof
-- 3 = Door
-- 4 = Chest
-- 5 = Furnace
-- 6 = Bed

-- 16 = Fuel

local wallIndex = 1
local roofIndex = 2
local doorIndex = 3
local chestIndex = 4
local furnaceIndex = 5
local bedIndex = 6
local fuelIndex = 16

function forceMoveLeft()
    turtle.turnLeft()
    forceMoveForward()
    turtle.turnRight()
end

function forceTurnLeft()
    turtle.turnLeft()
    forceMoveForward()
end

function forceMoveRight()
    turtle.turnRight()
    forceMoveForward()
    turtle.turnLeft()
end

function forceMoveUp()
    while not turtle.up() do
        turtle.digUp()
    end
end

function forceMoveDown()
    while not turtle.down() do
        turtle.digDown()
    end
end

function forceMoveBack()
    turtle.turnLeft()
    turtle.turnLeft()
    forceMoveForward()
    turtle.turnLeft()
    turtle.turnLeft()
end

function forceMoveForward()
    refuel()
    while not turtle.forward() do
        turtle.dig()
    end
end

function refuel()
    if turtle.getFuelLevel() ~= "unlimited" and turtle.getFuelLevel() < 10 then
        print("Refuelling")
        turtle.select(fuelIndex)
        turtle.refuel(1)
    end
end

function fillInDirection(length, height, blockIndex)

    for h = 1, height do
        --move to just before the end
        for i = 1, length do
            print("Moving to end of section")
            forceMoveForward()
        end

        --now move backwards, placing blocks
        print("Placing row")
        for l = 1, length do
                turtle.back()
                placeByIndex(blockIndex)
        end

        print("Moving up for next section")
        forceMoveUp()
    end
    print("Resetting height")
    --reset to original position
    for h = 1, height do
        turtle.down()
    end
end

function placeByIndex(index)
    turtle.select(index)
    turtle.place()
end

function buildRoom()
    print("Building left wall")
    fillInDirection(3,2,wallIndex) --left wall

    turtle.turnRight()
    print("Building front wall")
    fillInDirection(3,2,wallIndex) -- front wall


    print("Adding door to front wall")
    --clear the door part of the wall and place door
    forceMoveRight()
    forceMoveForward()
    forceMoveForward()
    forceTurnLeft() -- clear bottom half of door
    forceMoveUp() -- clear top half of door
    turtle.down()
    turtle.back()
    placeByIndex(doorIndex)

    --move to the end of the front wall on the right
    turtle.turnRight()
    forceMoveForward()
    forceMoveForward()
    forceTurnLeft()

    print("Building right wall")
    fillInDirection(3,2,wallIndex) --right wall

    --move to place back wall
    forceMoveRight()
    forceMoveForward()
    forceMoveForward()
    forceMoveForward()
    forceMoveForward()
    forceTurnLeft()

    print("Building back wall")
    fillInDirection(3,2,wallIndex) --back wall

    print("Building the roof")
    forceMoveUp()
    forceMoveUp()
    forceMoveForward()
    turtle.turnLeft()
    for i = 1, 3 do
        fillInDirection(3,1,roofIndex)
        forceMoveRight()
    end

    print("Moving inside")
    for i = 1, 4 do
        forceMoveForward()
    end
    forceMoveDown()
    forceMoveDown()
    forceMoveForward()
    forceTurnLeft()
    forceMoveForward()
    turtle.turnLeft()
    --now facing door
    print("Facing door")
    redstone.setOutput("front",4)
    turtle.forward()


    --forceMoveBack()
    --fillInDirection(1,2,cornerIndex) -- corner

end

--Do the things
buildRoom()