# Copyright (c) 2008-2010, 2012-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014 Brett Cannon <brett@python.org>
# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
# Copyright (c) 2015-2018 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
# Copyright (c) 2016 Alexander Pervakov <frost.nzcr4@jagmort.com>

# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/master/COPYING

"""
  %prog [options] <packages>

  create UML diagrams for classes and modules in <packages>
"""
from __future__ import print_function

import os
import subprocess
import sys

from pylint.config import ConfigurationMixIn
from pylint.pyreverse.inspector import Linker, project_from_files
from pylint.pyreverse.diadefslib import DiadefsHandler
from pylint.pyreverse import writer
from pylint.pyreverse.utils import insert_default_options

OPTIONS = (
    (
        "filter-mode",
        dict(
            short="f",
            default="PUB_ONLY",
            dest="mode",
            type="string",
            action="store",
            metavar="<mode>",
            help="""filter attributes and functions according to
    <mode>. Correct modes are :
                            'PUB_ONLY' filter all non public attributes
                                [DEFAULT], equivalent to PRIVATE+SPECIAL_A
                            'ALL' no filter
                            'SPECIAL' filter Python special functions
                                except constructor
                            'OTHER' filter protected and private
                                attributes""",
        ),
    ),
    (
        "class",
        dict(
            short="c",
            action="append",
            metavar="<class>",
            dest="classes",
            default=[],
            help="create a class diagram with all classes related to <class>;\
 this uses by default the options -ASmy",
        ),
    ),
    (
        "show-ancestors",
        dict(
            short="a",
            action="store",
            metavar="<ancestor>",
            type="int",
            help="show <ancestor> generations of ancestor classes not in <projects>",
        ),
    ),
    (
        "all-ancestors",
        dict(
            short="A",
            default=None,
            help="show all ancestors off all classes in <projects>",
        ),
    ),
    (
        "show-associated",
        dict(
            short="s",
            action="store",
            metavar="<association_level>",
            type="int",
            help="show <association_level> levels of associated classes not in <projects>",
        ),
    ),
    (
        "all-associated",
        dict(
            short="S",
            default=None,
            help="show recursively all associated off all associated classes",
        ),
    ),
    (
        "show-builtin",
        dict(
            short="b",
            action="store_true",
            default=False,
            help="include builtin objects in representation of classes",
        ),
    ),
    (
        "module-names",
        dict(
            short="m",
            default=None,
            type="yn",
            metavar="[yn]",
            help="include module name in representation of classes",
        ),
    ),
    # TODO : generate dependencies like in pylint
    # ("package-dependencies",
    # dict(short="M", action="store", metavar='<package_depth>', type='int',
    #     help='show <package_depth> module dependencies beyond modules in \
    # <projects> (for the package diagram)')),
    (
        "only-classnames",
        dict(
            short="k",
            action="store_true",
            default=False,
            help="don't show attributes and methods in the class boxes; \
this disables -f values",
        ),
    ),
    (
        "output",
        dict(
            short="o",
            dest="output_format",
            action="store",
            default="dot",
            metavar="<format>",
            help="create a *.<format> output file if format available.",
        ),
    ),
    (
        "ignore",
        {
            "type": "csv",
            "metavar": "<file[,file...]>",
            "dest": "black_list",
            "default": ("CVS",),
            "help": "Add files or directories to the blacklist. They "
            "should be base names, not paths.",
        },
    ),
    (
        "project",
        {
            "default": "",
            "type": "string",
            "short": "p",
            "metavar": "<project name>",
            "help": "set the project name.",
        },
    ),
)


def _check_graphviz_available(output_format):
    """check if we need graphviz for different output format"""
    try:
        subprocess.call(["dot", "-V"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    except OSError:
        print(
            "The output format '%s' is currently not available.\n"
            "Please install 'Graphviz' to have other output formats "
            "than 'dot' or 'vcg'." % output_format
        )
        sys.exit(32)


class Run(ConfigurationMixIn):
    """base class providing common behaviour for pyreverse commands"""

    options = OPTIONS  # type: ignore

    def __init__(self, args):
        ConfigurationMixIn.__init__(self, usage=__doc__)
        insert_default_options()
        args = self.load_command_line_configuration()
        if self.config.output_format not in ("dot", "vcg"):
            _check_graphviz_available(self.config.output_format)

        sys.exit(self.run(args))

    def run(self, args):
        """checking arguments and run project"""
        if not args:
            print(self.help())
            return 1
        # insert current working directory to the python path to recognize
        # dependencies to local modules even if cwd is not in the PYTHONPATH
        sys.path.insert(0, os.getcwd())
        try:
            project = project_from_files(
                args,
                project_name=self.config.project,
                black_list=self.config.black_list,
            )
            linker = Linker(project, tag=True)
            handler = DiadefsHandler(self.config)
            diadefs = handler.get_diadefs(project, linker)
        finally:
            sys.path.pop(0)

        if self.config.output_format == "vcg":
            writer.VCGWriter(self.config).write(diadefs)
        else:
            writer.DotWriter(self.config).write(diadefs)
        return 0


if __name__ == "__main__":
    Run(sys.argv[1:])
