import argparse
from pathlib import Path
from ..configuration import Config
from ..chat import ChatDB
from ..message import MessageFilter, Message


msg_suffix = Message.file_suffix_write


def convert(args: argparse.Namespace, config: Config) -> None:
    """
    Convert messages to a new format. Also used to change the suffix,
    to the latest default message file suffix.
    """
    chat = ChatDB.from_dir(Path(config.cache),
                           Path(config.db))
    # read all known message files
    msgs = chat.msg_gather(loc='disk', glob='*.*')
    # make a set of all message IDs
    # msg_ids = set([m.msg_id() for m in msgs])
    # set requested format and write all messages
    chat.set_msg_format(args.format)
    chat.msg_write(msgs)


def hist_cmd(args: argparse.Namespace, config: Config) -> None:
    """
    Handler for the 'hist' command.
    """

    mfilter = MessageFilter(tags_or=args.or_tags,
                            tags_and=args.and_tags,
                            tags_not=args.exclude_tags,
                            question_contains=args.question,
                            answer_contains=args.answer)
    chat = ChatDB.from_dir(Path(config.cache),
                           Path(config.db),
                           mfilter=mfilter)
    chat.print(args.source_code_only,
               args.with_tags,
               args.with_files)