# standard imports
import sys
import logging
import datetime

# external imports
from cic_eth_registry import CICRegistry
from cic_eth_registry.lookup.tokenindex import TokenIndexLookup
from cic_types.models.person import Person
from chainlib.eth.address import to_checksum_address
from chainlib.encode import TxHexNormalizer
from hexathon import add_0x

# local imports
from clicada.tx import TxGetter
from clicada.user import FileUserStore
from clicada.token import (
        FileTokenStore,
        token_balance,
        )
from clicada.tx import ResolvedTokenTx
from clicada.error import MetadataNotFoundError

logg = logging.getLogger(__name__)

tx_normalizer = TxHexNormalizer()


def process_args(argparser):
    argparser.add_argument('-m', '--method', type=str, help='lookup method')
    argparser.add_argument('--meta-url', dest='meta_url', type=str, help='Url to retrieve metadata from')
    argparser.add_argument('-f', '--force-update', dest='force_update', action='store_true', help='Update records of mutable entries')
    argparser.add_argument('identifier', type=str, help='user identifier')


def extra_args():
    return {
        'force_update': '_FORCE',
        'method': 'META_LOOKUP_METHOD',
        'meta_url': 'META_URL',
        'identifier': '_IDENTIFIER',
            }


def apply_args(config, args):
    if config.get('META_LOOKUP_METHOD'):
        raise NotImplementedError('Sorry, currently only "phone" lookup method is implemented')


def validate(config, args):
    pass


def execute(ctrl):
    tx_getter = TxGetter(ctrl.get('TX_CACHE_URL'), 10)

    store_path = '.clicada'
    user_phone_file_label = 'phone'
    user_phone_store = FileUserStore(ctrl.opener('meta'), ctrl.chain(), user_phone_file_label, store_path, int(ctrl.get('FILESTORE_TTL')))

    ctrl.notify('resolving identifier {} to wallet address'.format(ctrl.get('_IDENTIFIER')))
    user_address = user_phone_store.by_phone(ctrl.get('_IDENTIFIER'), update=ctrl.get('_FORCE'))
    if user_address == None:
        ctrl.ouch('unknown identifier: {}\n'.format(ctrl.get('_IDENTIFIER')))
        sys.exit(1)
    try:
        user_address = to_checksum_address(user_address)
    except ValueError:
        ctrl.ouch('invalid response "{}" for {}\n'.format(user_address, ctrl.get('_IDENTIFIER')))
        sys.exit(1)

    logg.debug('loaded user address {} for {}'.format(user_address, ctrl.get('_IDENTIFIER')))

    user_address_normal = tx_normalizer.wallet_address(user_address)
    ctrl.notify('retrieving txs for address {}'.format(user_address_normal))
    txs = tx_getter.get(user_address)

    token_store = FileTokenStore(ctrl.chain(), ctrl.conn(), 'token', store_path)

    user_address_file_label = 'address'
    user_address_store = FileUserStore(ctrl.opener('meta'), ctrl.chain(), user_address_file_label, store_path, int(ctrl.get('FILESTORE_TTL')))

    ctrl.notify('resolving metadata for address {}'.format(user_address_normal))
    try:
        r = user_address_store.by_address(user_address_normal, update=ctrl.get('_FORCE'))
    except MetadataNotFoundError as e:
        ctrl.ouch('could not resolve metadata for user: {}'.format(e))
        sys.exit(1)

    ctrl.write("""Phone: {}
Network address: {}
Chain: {}
Name: {}
Registered: {}
Gender: {}
Location: {}
Products: {}
Tags: {}""".format(
    ctrl.get('_IDENTIFIER'),
    add_0x(user_address),
    ctrl.chain().common_name(),
    str(r),
    datetime.datetime.fromtimestamp(r.date_registered).ctime(),
    r.gender,
    r.location['area_name'],
    ','.join(r.products),
    ','.join(r.tags),
    )
)

    tx_lines = []
    seen_tokens = {}
    for tx_src in txs['data']:
        ctrl.notify('resolve details for tx {}'.format(tx_src['tx_hash']))
        tx = ResolvedTokenTx.from_dict(tx_src)
        tx.resolve(token_store, user_address_store, show_decimals=True, update=ctrl.get('_FORCE'))
        tx_lines.append(tx)
        seen_tokens[tx.source_token_label] = tx.source_token
        seen_tokens[tx.destination_token_label] = tx.destination_token

    for k in seen_tokens.keys():
        ctrl.notify('resolve token {}'.format(seen_tokens[k]))
        (token_symbol, token_decimals) = token_store.by_address(seen_tokens[k])
        ctrl.notify('get token balance for {} => {}'.format(token_symbol, seen_tokens[k]))
        balance = token_balance(ctrl.chain(), ctrl.conn(), seen_tokens[k], user_address)
        fmt =  '{:.' + str(token_decimals) + 'f}'
        decimal_balance = fmt.format(balance / (10 ** token_decimals))
        ctrl.write("Balances:\n    {} {}".format(token_symbol, decimal_balance))

    print()
    for l in tx_lines:
        ctrl.write(l)