# -*- coding: utf-8 -*-

import argparse
import os
from logging import INFO, basicConfig, getLogger

from bugbug import db, repository
from bugbug.utils import zstd_compress

basicConfig(level=INFO)
logger = getLogger(__name__)


class Retriever(object):
    def __init__(self, cache_root):
        self.cache_root = cache_root

        assert os.path.isdir(cache_root), f"Cache root {cache_root} is not a dir."
        self.repo_dir = os.path.join(cache_root, "mozilla-central")

    def retrieve_commits(self):
        repository.clone(self.repo_dir)

        if not db.is_old_version(repository.COMMITS_DB):
            db.download(repository.COMMITS_DB, support_files_too=True)

            for commit in repository.get_commits():
                pass

            rev_start = f"children({commit['node']})"
        else:
            rev_start = 0

        repository.download_commits(self.repo_dir, rev_start)

        logger.info("commit data extracted from repository")

        zstd_compress("data/commits.json")
        zstd_compress("data/commit_experiences.pickle")


def main():
    description = "Retrieve and extract the information from Mozilla-Central repository"
    parser = argparse.ArgumentParser(description=description)

    parser.add_argument("cache-root", help="Cache for repository clones.")

    args = parser.parse_args()

    retriever = Retriever(getattr(args, "cache-root"))

    retriever.retrieve_commits()