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

from __future__ import annotations

from typing import Iterable, TYPE_CHECKING

if TYPE_CHECKING:
    from ..ExecContext import ExecContext

from ..util import run_cmd, run_sudo

from ..Package import Package, meta_tags

_meta_map: dict[str, str]|None = None

def meta_map():
    global _meta_map
    if _meta_map is None:
        _meta_map = Package.order_tags({
            'name': 'Name',
            'vendor': 'Vendor',
            'packager': 'Packager',
            'url': 'URL',
            'maintainer': None, # RPM doesn't have a maintainer field
        })
    return _meta_map

async def run_rpm(args: list[str], sudo: bool=False, ec: ExecContext=None, **kwargs): # export
    cmd = ['/usr/bin/rpm']
    cmd.extend(args)
    if sudo:
        return await run_sudo(cmd, ec=ec, **kwargs)
    return await run_cmd(cmd, ec=ec, **kwargs)

async def query_packages(names: Iterable[str] = [], ec: ExecContext=None) -> Iterable[Package]: # export
    fmt_str = '|'.join([(f'%{{{tag}}}' if tag else '') for tag in meta_map().values()]) + r'\n'
    opts = ['-q', '--queryformat', fmt_str]
    if not names:
        opts.append('-a')
    specs, stderr, status  = await run_rpm([*opts, *names], throw=True, sudo=False, ec=ec)
    return Package.parse_specs_str(specs)

async def list_files(pkg: str, ec: ExecContext=None) -> list[str]: # export
    file_list_str, stderr, status  = await run_rpm(['-ql', pkg], throw=True, sudo=False, ec=ec)
    return file_list_str.splitlines()