-- Function to read the bank ID from the configuration file
function readBankID()
    local file = fs.open("bank.cfg", "r")
    local bankID = file.readLine()
    file.close()
    return bankID
end

-- Function to connect to the bank (mockup)
function connectToBank(bankID)
    print("Connecting to bank with ID: " .. bankID)
    -- Simulate connection to the bank
    return true  -- Return true if the connection is successful
end

-- Function to send diamonds to the bank
function sendDiamondsToBank(diamonds)
    print("Sending " .. diamonds .. " diamonds to the bank...")
    -- Simulate sending diamonds
    return true  -- Return true if sending is successful
end

-- Function to request and get the PIN (mockup)
function requestPIN()
    print("Requesting PIN from the bank...")
    -- Simulate getting a PIN
    return "1234"  -- Mockup PIN for demonstration
end

-- Function to read the user's PIN from a file
function readUserPIN()
    local file = fs.open("user_pin.txt", "r")
    local pin = file.readLine()
    file.close()
    return pin
end

-- Function to update the balance
function updateBalance(diamonds)
    local balanceFile = "balance.txt"

    -- Read the current balance
    local currentBalance = 0
    if fs.exists(balanceFile) then
        local file = fs.open(balanceFile, "r")
        currentBalance = tonumber(file.readLine()) or 0
        file.close()
    end

    -- Update the balance
    currentBalance = currentBalance + diamonds

    -- Write the new balance back to the file
    local file = fs.open(balanceFile, "w")
    file.writeLine(tostring(currentBalance))
    file.close()

    print("Updated balance: " .. currentBalance)
end

-- Function to check for diamonds in the turtle's inventory
function checkDiamonds()
    local totalDiamonds = 0

    for slot = 1, 16 do
        turtle.select(slot)  -- Select the current slot
        if turtle.getItemCount() > 0 then  -- Check if the slot is not empty
            local itemDetail = turtle.getItemDetail()  -- Get item details
            if itemDetail.name == "minecraft:diamond" then  -- Check if it's a diamond
                totalDiamonds = totalDiamonds + itemDetail.count  -- Count the diamonds
            end
        end
    end

    return totalDiamonds  -- Return total diamonds found
end

-- Main program loop
while true do
    local diamonds = checkDiamonds()  -- Check for diamonds in the inventory
    if diamonds > 0 then
        local bankID = readBankID()  -- Get the bank ID from the config
        if connectToBank(bankID) then  -- Attempt to connect to the bank
            if sendDiamondsToBank(diamonds) then  -- Send diamonds
                local pin = requestPIN()  -- Request the PIN from the bank
                local userPIN = readUserPIN()  -- Read the user's PIN from a file

                if userPIN == pin then  -- Check if the user PIN matches
                    print("PIN accepted. Proceeding with transaction.")
                    updateBalance(diamonds)  -- Update the balance
                else
                    print("Invalid PIN entered.")
                end
            end
        end
    else
        print("No diamonds found in inventory.")
    end

    sleep(5)  -- Wait for 5 seconds before checking again (adjust as needed)
end