blood_altar

-- Blood Altar Turtle (redstone-based crafting, ASCII UI)
local TIMEOUT = 60  -- seconds to wait before giving up

---------------------------------------------------
-- Helpers
---------------------------------------------------
local function header(title)
    term.clear()
    term.setCursorPos(1,1)
    print("=== Blood Altar Turtle ===")
    print("--------------------------")
    print(title)
    print("")
end

local function getSlot1ItemId()
    local data = turtle.getItemDetail(1)
    if not data then return nil end
    return data.name
end

---------------------------------------------------
-- Crafting Logic
---------------------------------------------------
local function processOne()
    if turtle.getItemCount(1) == 0 then return false end

    local itemId = getSlot1ItemId()
    if not itemId then return false end

    header("Preparing item: " .. itemId)

    -- Drop item into altar
    turtle.select(1)
    while not turtle.drop(1) do
        header("Preparing item: " .. itemId)
        print("[!] Altar occupied. Waiting...")
        sleep(1)
    end
    turtle.suckUp(1)
    turtle.select(16)

    -- Wait for redstone signal or timeout
    local crafted = false
    local timer = os.startTimer(TIMEOUT)
    local waited = 0

    while true do
        header("Processing item: " .. itemId)
        print("[...] Waiting for altar signal")
        print("     Time waited: " .. waited .. "s / " .. TIMEOUT .. "s")

        local event, arg = os.pullEvent() -- wait for any event
        if event == "redstone" then
            crafted = true
            break
        elseif event == "timer" and arg == timer then
            header("Processing item: " .. itemId)
            print("[!] Timeout reached (" .. TIMEOUT .. "s). Assuming stuck.")
            break
        end
        waited = waited + 1
    end

    -- Pull finished item
    turtle.suck()

    -- Exit if slot 1 is empty
    if turtle.getItemCount(1) == 0 then
        header("Shutting down...")
        print("No more items in slot 1. Exiting program.")
        error("Slot 1 empty, exiting.")  -- stops the program
    end

    return true
end

---------------------------------------------------
-- Main Loop
---------------------------------------------------
header("Ready")
print("Put raw items in slot 1.")
print("Turtle will wait for altar signal.")
print("Timeout after " .. TIMEOUT .. " seconds.\n")

while true do
    if not processOne() then
        sleep(1)
    end
end