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# Takes the f_index and/or the l_index and saves them in the account file
# "f_index" is the index of the first address with balance and "l_index" is the index of the last address with balance
def write_fal_balance(f_index=0, l_index=0):
    if f_index > 0 and l_index > 0:
        fal_balance[0]["f_index"] = f_index
        fal_balance[0]["l_index"] = l_index

    elif f_index > 0:
        fal_balance[0]["f_index"] = f_index
    elif l_index > 0:

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# Writes the index, address and balance, as well as the checksum of address + seed into the account file
def write_address_data(index, address, balance):
    address = address_checksum(address)
    for p in address_data:
        if p["address"] == address:
            p["balance"] = balance
            with open(file_name, 'w') as account_data:
                json.dump(raw_account_data, account_data)
            return

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# Gets the first address after the last address with balance. If there is no saved address it will generate a new one
def get_deposit_address():
    try:
        l_index = fal_balance[0]["l_index"]
        if l_index == 0:
            deposit_address = address_data[0]["address"]
            return deposit_address

        for p in address_data:
            address = p["address"]

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# Displays all saved addresses and there balance
def full_account_info():
    update_addresses_balance(fal_balance[0]["f_index"])
    update_fal_balance()
    if len(address_data) > 0:
        all_address_data = ""
        for p in address_data:
            address = p["address"]
            checksum = p["checksum"]
            balance = int(p["balance"])

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# Displays all addresses with balance, the total account balance and a deposit address.
# In case that there are no saved addresses it will ask if the account should be scanned for balance
# If the User answers with no, then it will just generate a deposit address (at index 0)
def standard_account_info():
    address_count = len(address_data)
    update_addresses_balance(fal_balance[0]["f_index"])
    update_fal_balance()

    if address_count < 1:
        find_balance(10)

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# Will ask the user to enter the amount and Units (Iota, MegaIota, GigaIota,etc.)
def transfer_value_user_input():
    print("\n\nEnter a number and the the unit size.\n"
          "Avaliable units are \"i\"(Iota), \"ki\"(KiloIota), \"mi\"(MegaIota), "
          "\"gi\"(GigaIota) and \"ti\"(TerraIota)\n"
          "Example: If you enter \"12.3 gi\", I will send 12.3 GigaIota\n")
    ask_user = True
    while ask_user:
        user_input = raw_input("Please enter the amount to send: ")
        user_input = user_input.upper()

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# Gets all necessary data from the user to make one or more transfers
def prepare_transferes():
    new_transfer = True
    prepared_transferes = []
    while new_transfer:
        get_recipient_address = True
        while get_recipient_address:
            recipient_address = raw_input("\nPlease enter the receiving address: ")

            if len(recipient_address) == 81:

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# Takes the prepared transaction data and sends it to the IOTA node for attaching itto the tangle
def send_transfer(prepared_transferes):
    print("Sending transfer, this can take a while...")
    change_addy = bytes(get_deposit_address())
    api = Iota(iota_node, seed)
    api.send_transfer(
        depth=7,
        transfers=prepared_transferes,
        change_address=change_addy,
        min_weight_magnitude=18

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# -------------------------------------Transaction history------------------------------------------------------------


# Reads the data from the account file and displays it to the user.
# If full_history is True it will print all transactions that are saved.
# If full_history is false it will print only confirmed transactions unless the transaction is no older then
# 6 hours, then it will print the transaction regardless of it's confirmation state
def print_transaction_history(full_history=False, print_history=True):
    regex = r"^(?=.*?[9])(?=.*?[A-Z])[A-Z9_]+$"
    current_unix_time = time.time()

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#execute command according to transaction tag
#To turn on led use this command TURNONLED999999999999999999
#To turn off led use this command TURNOFFLED99999999999999999
#To rotate servo motor use this command TURNONSERVO9999999999999999
def execute_command(command):
    print("Transaction tag: " + command)
    if command == 'TURNONLED':
        blink_led(True)
    elif command == 'TURNOFFLED':
        blink_led(False)