# external imports
from chainlib.settings import process_settings as base_process_settings
from chainlib.error import SignerMissingException
from hexathon import add_0x

# local imports
import chainlib.eth.cli


def process_settings_rpc(settings, config):
    rpc = chainlib.eth.cli.Rpc(settings.get('WALLET'))
    conn = rpc.connect_by_config(config)

    try:
        settings.set('SIGNER', rpc.get_signer())
        sender_address = rpc.get_sender_address()
        settings.set('SENDER_ADDRESS', add_0x(sender_address))
    except AttributeError:
        pass
    except SignerMissingException:
        pass

    gas_oracle = rpc.get_gas_oracle()
    settings.set('GAS_ORACLE', gas_oracle)

    nonce_oracle = rpc.get_nonce_oracle()
    settings.set('NONCE_ORACLE', nonce_oracle)

    settings.set('CONN', conn)
    settings.set('RPC_ID_GENERATOR', rpc.id_generator)
    settings.set('RPC_SEND', config.true('_RPC_SEND'))
    return settings


def process_settings_wallet(settings, config):
    wallet = chainlib.eth.cli.Wallet()
    wallet.from_config(config)

    recipient_in = None
    try:
        recipient_in = config.get('_RECIPIENT')
    except KeyError:
        return settings

    if wallet.get_signer_address() == None and recipient_in != None:
        recipient_in = wallet.from_address(recipient_in)

    recipient = add_0x(recipient_in)

    if not config.true('_UNSAFE') and recipient != recipient_in:
        raise ValueError('invalid checksum address: {}'.format(recipient_in))


    settings.set('WALLET', wallet)
    settings.set('RECIPIENT', recipient)
    return settings


def process_settings_contract(settings, config):
    exec_address_in = None
    try:
        exec_address_in = config.get('_EXEC_ADDRESS')
    except KeyError:
        return settings

    exec_address = add_0x(exec_address_in)

    if not config.true('_UNSAFE') and exec_address != exec_address_in:
        raise ValueError('invalid checksum address: {}'.format(exec_address_in))

    settings.set('EXEC', exec_address)
    return settings


def process_settings(settings, config):
    settings = base_process_settings(settings, config)
    settings = process_settings_wallet(settings, config)
    settings = process_settings_rpc(settings, config)
    return settings