local success, block = turtle.inspectUp()
local success, bottom = turtle.inspectDown()
halt = 0
wait = 0
up = 0
local modem = peripheral.wrap("left")

function imMaster()
    t = peripheral.wrap("front")
    for i = 1,15 do
        turtle.suckUp(1)
        turtle.place()
        peripheral.call("front", "turnOn")
        print("Turtle", i, " deployed!")
        if turtle.place() == false then
            wait = 1
            while wait == 1 do
                sleep(1)
                turtle.detect()
                if turtle.detect() == false then
                    wait = 0
                end
            end
            turtle.place()
        end
    end
    turtle.forward()
    turtle.digDown()
end

function position()
    while halt == 0 do
        turtle.forward()
        if turtle.detect() == true then
            halt = 1
        end
    end
    halt = 0
    turtle.turnLeft()
end

function imSlave()
    if turtle.detectUp() == false then
        up = 1
        while up == 1 do
            turtle.up()
            if turtle.detectUp() == true then
                up = 0
                turtle.turnRight()
            end
        end
        if turtle.detect() == false then
            while halt == 0 do
                turtle.forward()
                if turtle.detect() == true then
                    halt = 1
                end
            end
            halt = 0
        end
        turtle.turnLeft()
        turtle.digDown()
    else
        turtle.turnRight()
        if turtle.detect() == false then
            while halt == 0 do
                turtle.forward()
                if turtle.detect() == true then
                    halt = 1
                end
            end
            halt = 0
        end
        turtle.turnLeft()
        turtle.digDown()
    end
end




if block.name == "minecraft:shulker_box" then
    imMaster()
else
    imSlave()
end

rednet.open("left", 1)

while true do
    id, msg = rednet.receive()
    print(msg)
    if msg == "tunnel" then
        for i = 1,50 do
            turtle.dig()
            turtle.forward()
            print(i)
        end
        turtle.turnLeft()
        turtle.turnLeft()
        for i = 1,50 do
            turtle.dig()
            turtle.forward()
            print(i)
        end
        sleep(10)
        if turtle.detectDown() == false then
            print("Im on bottom")
            for i = 1,3 do
                turtle.digUp()
                turtle.up()
            end
            for i = 1,3 do
                turtle.down()
            end
            turtle.turnLeft()
            local success, chest = turtle.inspect()
            if chest.name == "minecraft:chest" then
                for i = 1,4 do
                    for i = 1,16 do
                        turtle.select(i)
                        turtle.drop()
                    end
                    sleep(2)
                end
                turtle.turnLeft()
                turtle.turnLeft()
                for i = 1,3 do
                    turtle.dig()
                    turtle.forward()
                end
                turtle.turnLeft()
                turtle.forward()
                turtle.turnRight()
                turtle.turnRight()
            else
                for i = 1,4 do
                    for i = 1,16 do
                        turtle.select(i)
                        turtle.drop()
                    end
                end
            end
        else
            sleep(20)
        end
    end
end