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import gzip
from pathlib import Path
import re
from typing import Mapping

from .base import Repository, Version

__all__ = [
    'focal_main_amd64',
    'focal_restricted_amd64',
    'focal_universe_amd64',
    'focal_multiverse_amd64',

    'focal_updates_main_amd64',
    'focal_updates_restricted_amd64',
    'focal_updates_universe_amd64',
    'focal_updates_multiverse_amd64',

    'focal_backports_main_amd64',
    'focal_backports_restricted_amd64',
    'focal_backports_universe_amd64',
    'focal_backports_multiverse_amd64',

    'focal_security_main_amd64',
    'focal_security_restricted_amd64',
    'focal_security_universe_amd64',
    'focal_security_multiverse_amd64',

    'groovy_main_amd64',
    'groovy_restricted_amd64',
    'groovy_universe_amd64',
    'groovy_multiverse_amd64',

    'groovy_updates_main_amd64',
    'groovy_updates_restricted_amd64',
    'groovy_updates_universe_amd64',
    'groovy_updates_multiverse_amd64',

    'groovy_backports_main_amd64',
    'groovy_backports_restricted_amd64',
    'groovy_backports_universe_amd64',
    'groovy_backports_multiverse_amd64',

    'groovy_security_main_amd64',
    'groovy_security_restricted_amd64',
    'groovy_security_universe_amd64',
    'groovy_security_multiverse_amd64',
]

PACKAGE_REVISION_INFO = re.compile(r'(\+\w+)*-\d+$')

def parse_cached(cached: Path) -> Mapping[str, Version]:
    result = dict()
    with gzip.open(cached, mode='rt') as file:
        this_package = None
        this_version = None
        for line in file:
            line = line.strip()
            pieces = line.split(': ', 1)
            if len(pieces) != 2:
                continue
            line_type, line_data = pieces
            if line_type == 'Package':
                this_package = line_data
            elif line_type == 'Version':
                this_version = line_data

            if this_package is not None and this_version is not None:
                clean_version = PACKAGE_REVISION_INFO.sub('', this_version)
                result[this_package] = Version(this_version, clean_version)
                this_version = None
                this_package = None
    return result

def build_repo(name: str, dist: str, section: str, arch: str = 'all') -> Repository:
    url = f'http://archive.ubuntu.com/ubuntu/dists/{dist}/{section}/binary-{arch}/Packages.gz'
    return Repository(
        family='Ubuntu',
        repo=name,
        index_url=url,
        parse=parse_cached,
    )

focal_main_amd64 = build_repo('20.04 Focal (main/amd64)', 'focal', 'main', 'amd64')
focal_restricted_amd64 = build_repo('20.04 Focal (restricted/amd64)', 'focal', 'restricted', 'amd64')
focal_universe_amd64 = build_repo('20.04 Focal (universe/amd64)', 'focal', 'universe', 'amd64')
focal_multiverse_amd64 = build_repo('20.04 Focal (multiverse/amd64)', 'focal', 'multiverse', 'amd64')

focal_updates_main_amd64 = build_repo('20.04 Focal Updates (main/amd64)', 'focal-updates', 'main', 'amd64')
focal_updates_restricted_amd64 = build_repo('20.04 Focal Updates (restricted/amd64)', 'focal-updates', 'restricted', 'amd64')
focal_updates_universe_amd64 = build_repo('20.04 Focal Updates (universe/amd64)', 'focal-updates', 'universe', 'amd64')
focal_updates_multiverse_amd64 = build_repo('20.04 Focal Updates (multiverse/amd64)', 'focal-updates', 'multiverse', 'amd64')

focal_backports_main_amd64 = build_repo('20.04 Focal Backports (main/amd64)', 'focal-backports', 'main', 'amd64')
focal_backports_restricted_amd64 = build_repo('20.04 Focal Backports (restricted/amd64)', 'focal-backports', 'restricted', 'amd64')
focal_backports_universe_amd64 = build_repo('20.04 Focal Backports (universe/amd64)', 'focal-backports', 'universe', 'amd64')
focal_backports_multiverse_amd64 = build_repo('20.04 Focal Backports (multiverse/amd64)', 'focal-backports', 'multiverse', 'amd64')

focal_security_main_amd64 = build_repo('20.04 Focal Updates (main/amd64)', 'focal-security', 'main', 'amd64')
focal_security_restricted_amd64 = build_repo('20.04 Focal Updates (restricted/amd64)', 'focal-security', 'restricted', 'amd64')
focal_security_universe_amd64 = build_repo('20.04 Focal Updates (universe/amd64)', 'focal-security', 'universe', 'amd64')
focal_security_multiverse_amd64 = build_repo('20.04 Focal Updates (multiverse/amd64)', 'focal-security', 'multiverse', 'amd64')

groovy_main_amd64 = build_repo('20.10 Groovy (main/amd64)', 'groovy', 'main', 'amd64')
groovy_restricted_amd64 = build_repo('20.10 Groovy (restricted/amd64)', 'groovy', 'restricted', 'amd64')
groovy_universe_amd64 = build_repo('20.10 Groovy (universe/amd64)', 'groovy', 'universe', 'amd64')
groovy_multiverse_amd64 = build_repo('20.10 Groovy (multiverse/amd64)', 'groovy', 'multiverse', 'amd64')

groovy_updates_main_amd64 = build_repo('20.10 Groovy Updates (main/amd64)', 'groovy-updates', 'main', 'amd64')
groovy_updates_restricted_amd64 = build_repo('20.10 Groovy Updates (restricted/amd64)', 'groovy-updates', 'restricted', 'amd64')
groovy_updates_universe_amd64 = build_repo('20.10 Groovy Updates (universe/amd64)', 'groovy-updates', 'universe', 'amd64')
groovy_updates_multiverse_amd64 = build_repo('20.10 Groovy Updates (multiverse/amd64)', 'groovy-updates', 'multiverse', 'amd64')

groovy_backports_main_amd64 = build_repo('20.10 Groovy Backports (main/amd64)', 'groovy-backports', 'main', 'amd64')
groovy_backports_restricted_amd64 = build_repo('20.10 Groovy Backports (restricted/amd64)', 'groovy-backports', 'restricted', 'amd64')
groovy_backports_universe_amd64 = build_repo('20.10 Groovy Backports (universe/amd64)', 'groovy-backports', 'universe', 'amd64')
groovy_backports_multiverse_amd64 = build_repo('20.10 Groovy Backports (multiverse/amd64)', 'groovy-backports', 'multiverse', 'amd64')

groovy_security_main_amd64 = build_repo('20.10 Groovy Updates (main/amd64)', 'groovy-security', 'main', 'amd64')
groovy_security_restricted_amd64 = build_repo('20.10 Groovy Updates (restricted/amd64)', 'groovy-security', 'restricted', 'amd64')
groovy_security_universe_amd64 = build_repo('20.10 Groovy Updates (universe/amd64)', 'groovy-security', 'universe', 'amd64')
groovy_security_multiverse_amd64 = build_repo('20.10 Groovy Updates (multiverse/amd64)', 'groovy-security', 'multiverse', 'amd64')