#!/usr/bin/env python3
#
# fdroid.py - part of the FDroid server tools
# Copyright (C) 2010-2015, Ciaran Gultnieks, ciaran@ciarang.com
# Copyright (C) 2013-2014 Daniel Marti <mvdan@mvdan.cc>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import sys
import logging

import fdroidserver.common
import fdroidserver.metadata
from argparse import ArgumentError
from collections import OrderedDict

commands = OrderedDict([
    ("build", "Build a package from source"),
    ("init", "Quickly start a new repository"),
    ("publish", "Sign and place packages in the repo"),
    ("gpgsign", "Add gpg signatures for packages in repo"),
    ("update", "Update repo information for new packages"),
    ("verify", "Verify the integrity of downloaded packages"),
    ("checkupdates", "Check for updates to applications"),
    ("import", "Add a new application from its source code"),
    ("install", "Install built packages on devices"),
    ("readmeta", "Read all the metadata files and exit"),
    ("rewritemeta", "Rewrite all the metadata files"),
    ("lint", "Warn about possible metadata errors"),
    ("scanner", "Scan the source code of a package"),
    ("dscanner", "Dynamically scan APKs post build"),
    ("stats", "Update the stats of the repo"),
    ("server", "Interact with the repo HTTP server"),
    ("signindex", "Sign indexes created using update --nosign"),
    ("btlog", "Update the binary transparency log for a URL"),
    ("signatures", "Extract signatures from APKs"),
])


def print_help():
    print("usage: fdroid [-h|--help|--version] <command> [<args>]")
    print("")
    print("Valid commands are:")
    for cmd, summary in commands.items():
        print("   " + cmd + ' ' * (15 - len(cmd)) + summary)
    print("")


def main():

    if len(sys.argv) <= 1:
        print_help()
        sys.exit(0)

    command = sys.argv[1]
    if command not in commands:
        if command in ('-h', '--help'):
            print_help()
            sys.exit(0)
        elif command == '--version':
            import os.path
            output = 'no version info found!'
            cmddir = os.path.realpath(os.path.dirname(__file__))
            moduledir = os.path.realpath(os.path.dirname(fdroidserver.common.__file__) + '/..')
            if cmddir == moduledir:
                # running from git
                os.chdir(cmddir)
                if os.path.isdir('.git'):
                    import subprocess
                    try:
                        output = subprocess.check_output(['git', 'describe'],
                                                         stderr=subprocess.STDOUT,
                                                         universal_newlines=True)
                    except subprocess.CalledProcessError:
                        output = 'git commit ' + subprocess.check_output(['git', 'rev-parse', 'HEAD'],
                                                                         universal_newlines=True)
                elif os.path.exists('setup.py'):
                    import re
                    m = re.search(r'''.*[\s,\(]+version\s*=\s*["']([0-9a-z.]+)["'].*''',
                                  open('setup.py').read(), flags=re.MULTILINE)
                    if m:
                        output = m.group(1) + '\n'
            else:
                from pkg_resources import get_distribution
                output = get_distribution('fdroidserver').version + '\n'
            print(output),
            sys.exit(0)
        else:
            print("Command '%s' not recognised.\n" % command)
            print_help()
            sys.exit(1)

    verbose = any(s in sys.argv for s in ['-v', '--verbose'])
    quiet = any(s in sys.argv for s in ['-q', '--quiet'])

    # Helpful to differentiate warnings from errors even when on quiet
    logformat = '%(levelname)s: %(message)s'
    loglevel = logging.INFO
    if verbose:
        loglevel = logging.DEBUG
    elif quiet:
        loglevel = logging.WARN

    logging.basicConfig(format=logformat, level=loglevel)

    if verbose and quiet:
        logging.critical("Specifying --verbose and --quiet and the same time is silly")
        sys.exit(1)

    # Trick optparse into displaying the right usage when --help is used.
    sys.argv[0] += ' ' + command

    del sys.argv[1]
    mod = __import__('fdroidserver.' + command, None, None, [command])

    try:
        mod.main()
    # These are ours, contain a proper message and are "expected"
    except (fdroidserver.common.FDroidException,
            fdroidserver.metadata.MetaDataException) as e:
        if verbose:
            raise
        else:
            logging.critical(str(e))
        sys.exit(1)
    except ArgumentError as e:
        logging.critical(str(e))
        sys.exit(1)
    except KeyboardInterrupt:
        print('')
        sys.exit(1)
    # These should only be unexpected crashes due to bugs in the code
    # str(e) often doesn't contain a reason, so just show the backtrace
    except Exception as e:
        logging.critical("Unknown exception found!")
        raise
    sys.exit(0)


if __name__ == "__main__":
    main()