#!/usr/bin/python
#
# Copyright 2010 Brian Dolbec <brian.dolbec@gmail.com>
# Copyright(c) 2010, Gentoo Foundation
# Copyright 2003-2004 Karl Trygve Kalleberg
# Licensed under the GNU General Public License, v2

"""Gentoo's installed packages analysis and repair tool"""


# Move to Imports section after Python 2.6 is stable


__docformat__ = "epytext"
# version is dynamically set by meson dist
__version__ = "@VERSION@"
__productname__ = "enalyze"
__authors__ = "Brian Dolbec, <brian.dolbec@gmail.com>"

# make an exportable copy of the info for help output
MODULE_INFO = {
    "__docformat__": __docformat__,
    "__doc__": __doc__,
    "__version__": __version__,
    "__productname__": __productname__,
    "__authors__": __authors__,
}

import errno
import sys
from getopt import getopt, GetoptError

import portage

import gentoolkit as gen
from gentoolkit import errors
from gentoolkit import pprinter as pp
from gentoolkit.base import (
    initialize_configuration,
    split_arguments,
    parse_global_options,
    print_help,
)


NAME_MAP = {"a": "analyze", "r": "rebuild"}

FORMATTED_OPTIONS = (
    ("    (a)nalyze", "analyzes the installed PKG database USE flag or keyword useage"),
    (
        "    (r)ebuild",
        "analyzes the Installed PKG database and generates files suitable",
    ),
    ("  ", "to replace corrupted or missing /etc/portage/package.* files"),
)


def expand_module_name(module_name):
    """Returns one of the values of NAME_MAP or raises KeyError"""

    if module_name == "list":
        # list is a Python builtin type, so we must rename our module
        return "list_"
    elif module_name in NAME_MAP.values():
        return module_name
    else:
        return NAME_MAP[module_name]


def main():
    """Parse input and run the program."""

    short_opts = "hqCNV"
    long_opts = ("help", "quiet", "nocolor", "no-color", "no-pipe", "version", "debug")

    initialize_configuration()

    try:
        global_opts, args = getopt(sys.argv[1:], short_opts, long_opts)
    except GetoptError as err:
        sys.stderr.write(" \n")
        sys.stderr.write(pp.error("Global %s\n" % err))
        print_help(MODULE_INFO, FORMATTED_OPTIONS, with_description=False)
        sys.exit(2)

    # Parse global options
    need_help = parse_global_options(global_opts, args, MODULE_INFO, FORMATTED_OPTIONS)

    if gen.CONFIG["quiet"]:
        gen.CONFIG["verbose"] = False

    try:
        module_name, module_args = split_arguments(args)
    except IndexError:
        print_help(MODULE_INFO, FORMATTED_OPTIONS)
        sys.exit(2)

    if need_help:
        module_args.append("--help")

    try:
        expanded_module_name = expand_module_name(module_name)
    except KeyError:
        sys.stderr.write(pp.error("Unknown module '%s'" % module_name))
        print_help(MODULE_INFO, FORMATTED_OPTIONS, with_description=False)
        sys.exit(2)

    try:
        loaded_module = __import__(expanded_module_name, globals(), locals(), [], 1)
        loaded_module.main(module_args)
    except portage.exception.AmbiguousPackageName as err:
        raise errors.GentoolkitAmbiguousPackage(err.args[0])
    except OSError as err:
        if err.errno != errno.EPIPE:
            raise


if __name__ == "__main__":
    main()
