-- Crafting Turtle Script
-- Run this on the crafting turtle (turtle with crafting table).
-- Listens for craft commands from the master computer via wired modem.

local CRAFT_CHANNEL       = 4203
local CRAFT_REPLY_CHANNEL = 4204

-- Find modem (wired or wireless)
local modem = peripheral.find("modem")
if not modem then
    print("[ERR] No modem found! Attach a wired modem.")
    return
end

modem.open(CRAFT_CHANNEL)

print("=================================")
print("  Crafting Turtle (Listener)")
print("=================================")
print("")
print("Listening on channel " .. CRAFT_CHANNEL)
print("Ready for craft commands from master.")
print("")

while true do
    local event, side, channel, replyChannel, message = os.pullEvent("modem_message")
    if channel == CRAFT_CHANNEL and type(message) == "table" and message.type == "craft" then
        local count = message.count or 1
        print(string.format("[CRAFT] Received craft request (count=%d)", count))

        local ok, err = turtle.craft(count)

        if ok then
            print("[CRAFT] Success!")
        else
            print("[CRAFT] Failed: " .. tostring(err))
        end

        modem.transmit(replyChannel, CRAFT_CHANNEL, {
            type    = "craft_result",
            success = ok,
            error   = not ok and tostring(err) or nil,
        })
    end
end