# standard imports
import logging
import importlib
import os

# external imports
from cic_types.ext.metadata import MetadataRequestsHandler
from cic_types.ext.metadata.signer import Signer as MetadataSigner

# local imports
from cic import (
        Proof,
        Processor,
        )
from cic.output import (
        HTTPWriter,
        KeyedWriterFactory,
        )
from cic.meta import (
        Meta,
        MetadataWriter,
        )
from cic.attachment import Attachment
from cic.network import Network
from cic.token import Token
from typing import Optional
logg = logging.getLogger(__name__)





def init_writers_from_config(config):
    w = {
            'meta': None,
            'attachment': None,
            'proof': None,
            'ext': None,
        }
    for v in w.keys():
        k = 'CIC_CORE_{}_WRITER'.format(v.upper())
        (d, c) = config.get(k).rsplit('.', maxsplit=1)
        m = importlib.import_module(d)
        o = getattr(m, c)
        w[v] = o
        
    return w


def deploy(config, target: str,contract_directory: str, metadata_endpoint: Optional[str], keystore_directory: str, key_file_path: str, gpg_passphrase: str):
    modname = 'cic.ext.{}'.format(target)
    cmd_mod = importlib.import_module(modname)

    writers = init_writers_from_config(config)
    output_directory =  os.path.join(contract_directory, 'out')
    output_writer_path_meta = output_directory
    if metadata_endpoint != None:
        MetadataRequestsHandler.base_url = metadata_endpoint
        MetadataSigner.gpg_path = os.path.join('/tmp')
        MetadataSigner.key_file_path = key_file_path
        MetadataSigner.gpg_passphrase = gpg_passphrase
        writers['proof'] = KeyedWriterFactory(MetadataWriter, HTTPWriter).new
        writers['attachment'] = KeyedWriterFactory(None, HTTPWriter).new
        writers['meta'] = MetadataWriter
        output_writer_path_meta = metadata_endpoint
    
    ct = Token(path=contract_directory)
    cm = Meta(path=contract_directory, writer=writers['meta'](path=output_writer_path_meta))
    ca = Attachment(path=contract_directory, writer=writers['attachment'](path=output_writer_path_meta))
    cp = Proof(path=contract_directory, attachments=ca, writer=writers['proof'](path=output_writer_path_meta))
    cn = Network(path=contract_directory)

    ca.load()
    ct.load()
    cp.load()
    cm.load()
    cn.load()

    chain_spec = None
    try:
        chain_spec = config.get('CHAIN_SPEC')
    except KeyError:
        chain_spec = cn.chain_spec
        config.add(chain_spec, 'CHAIN_SPEC', exists_ok=True)
        logg.debug(f'CHAIN_SPEC config set to {str(chain_spec)}')

    (rpc, signer) = cmd_mod.parse_adapter(config, keystore_directory)

    ref = cn.resource(target)
    chain_spec = cn.chain_spec(target)
    logg.debug('found reference {} chain spec {} for target {}'.format(ref['contents'], chain_spec, target))
    c = getattr(cmd_mod, 'new')(chain_spec, ref['contents'], cp, signer_hint=signer, rpc=rpc, outputs_writer=writers['ext'](path=output_directory))
    c.apply_token(ct)

    p = Processor(proof=cp, attachment=ca, metadata=cm, extensions=[c])
    p.process()