# -*- coding: utf-8 -*-
# Copyright (C) 2017  IRISA
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# The original code contained here was initially developed by:
#
#     Pierre Vignet.
#     IRISA
#     Dyliss team
#     IRISA Campus de Beaulieu
#     35042 RENNES Cedex, FRANCE
"""Entry point and argument parser for cadbiom_cmd package"""
from __future__ import unicode_literals
from __future__ import print_function

# Standard imports
import argparse
import os
import sys

# Custom imports
import cadbiom.commons as cm

LOGGER = cm.logger()

def launch_researchs(args):
    """Parse arguments and launch Cadbiom search of MACs
    (Minimal Activation Conditions).
    """

    # Module import
    import solution_search
    params = args_to_param(args)
    solution_search.launch_researchs(params) # !


def launch_sort(args):
    """Read a solution file or a directory containing solution files
    (*cam* files), and sort all frontier places/boundaries in alphabetical order.
    """

    # Module import
    import solution_sort
    params = args_to_param(args)
    solution_sort.sort_solutions(params['path'])


def traj_2_graph(args):
    """Parse a complete solution file and make a representation of trajectories.
    """

    # Module import
    import solution_repr
    params = args_to_param(args)
    params['output'] = params['output'] if params['output'][-1] == '/' \
                        else params['output'] + '/'
    solution_repr.parse_trajectories_main(
        params['output'],
        params['chart_file'],
        params['sol_file']
    )

def traj_2_json(args):
    """Create a JSON formated file containing all data from complete MAC files
    (frontier places/boundaries and decompiled steps with their respective
    events).

    This is a function to quickly search all transition attributes involved
    in a solution.
    """

    # Module import
    import solution_repr
    params = args_to_param(args)
    params['output'] = params['output'] if params['output'][-1] == '/' \
                        else params['output'] + '/'
    solution_repr.traj_2_json(
        params['output'],
        params['chart_file'],
        params['path'],
        conditions=not params['no_conditions'], # Inv the param...
    )

def model_comp(args):
    """Model consistency checking.

    Check if the graphs of two models have the same topology, nodes & edges
    attributes/roles.
    """

    # Module import
    import solution_repr
    params = args_to_param(args)
    params['output'] = params['output'] if params['output'][-1] == '/' \
                        else params['output'] + '/'
    solution_repr.graph_isomorph_test(
        params['model_file_1'],
        params['model_file_2'],
        params['output'],
        params['graphs'],
        params['json'],
    )


def model_info(args):
    """Provide several levels of information about the structure of the model
    and its places/entities.
    """

    # Module import
    import solution_repr
    params = args_to_param(args)

    params['output_dir'] = params['output'] if params['output'][-1] == '/' \
                        else params['output'] + '/'
    solution_repr.model_info(**params)


def model_graph(args):
    """Information about the graph based on the model.

    Get centralities (degree, in_degree, out_degree, closeness, betweenness).
    Forge a GraphML file.
    """

    # Module import
    import solution_repr
    params = args_to_param(args)
    params['output_dir'] = params['output'] if params['output'][-1] == '/' \
                        else params['output'] + '/'
    solution_repr.model_graph(**params)


def merge_cams(args):
    """Merge solutions to a csv file."""

    # Module import
    import solution_merge
    params = args_to_param(args)
    solution_merge.merge_cams_to_csv(params['solutions_directory'],
                                     params['output'])


def args_to_param(args):
    """Return argparse namespace as a dict {variable name: value}"""
    return {k: v for k, v in vars(args).items() if k != 'func'}


class ReadableFile(argparse.Action):
    """
    http://stackoverflow.com/questions/11415570/directory-path-types-with-argparse
    """

    def __call__(self, parser, namespace, values, option_string=None):
        prospective_file = values

        if not os.path.isfile(prospective_file):
            raise argparse.ArgumentTypeError(
                "readable_file:{0} is not a valid path".format(
                    prospective_file)
                )

        if os.access(prospective_file, os.R_OK):
            setattr(namespace, self.dest, prospective_file)
        else:
            raise argparse.ArgumentTypeError(
                "readable_file:{0} is not a readable file".format(
                    prospective_file)
                )


class ReadableDir(argparse.Action):
    """
    http://stackoverflow.com/questions/11415570/directory-path-types-with-argparse
    """

    def __call__(self, parser, namespace, values, option_string=None):
        prospective_dir = values

        if not os.path.isdir(prospective_dir):
            raise argparse.ArgumentTypeError(
                "readable_dir:{0} is not a valid path".format(
                    prospective_dir)
                )

        if os.access(prospective_dir, os.R_OK):
            setattr(namespace, self.dest, prospective_dir)
        else:
            raise argparse.ArgumentTypeError(
                "readable_dir:{0} is not a readable dir".format(
                    prospective_dir)
                )


def main():
    """Argument parser"""

    # parser configuration
    parser = argparse.ArgumentParser(description=__doc__)
    # Default log level: debug
    parser.add_argument('-vv', '--verbose', nargs='?', default='info')
    # Subparsers
    subparsers = parser.add_subparsers(title='subcommands')

    # PS: nargs='?' = optional
    # subparser: Compute macs
    #    steps      = 10
    #    final_prop = "P"
    #    start_prop = None
    #    inv_prop   = None
    parser_input_file = subparsers.add_parser(
        'compute_macs',
        help=launch_researchs.__doc__,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )
    parser_input_file.add_argument('chart_file')
    # Get final_property alone OR an input_file containing multiple properties
    group = parser_input_file.add_mutually_exclusive_group(required=True)
    group.add_argument('final_prop', nargs='?')
    group.add_argument('--input_file', action=ReadableFile, nargs='?',
        help="Without input file, there will be only one process. " + \
        "While there will be 1 process per line (per logical formula " + \
        "on each line)")
    parser_input_file.add_argument('--output', action=ReadableDir, nargs='?',
        default='result/', help="Output directory.")

    # default: False
    parser_input_file.add_argument('--combinations', action='store_true',
        help="If input_file is set, we can compute all combinations of " + \
        "given elements on each line")
    parser_input_file.add_argument('--steps', type=int, nargs='?', default=10,
        help="Maximum of allowed steps to find macs")
    # https://docs.python.org/dev/library/argparse.html#action
    # all_macs to False by default
    parser_input_file.add_argument('--all_macs', action='store_true',
        help="Solver will try to search all macs with 0 to the maximum of " + \
        "allowed steps.")
    # continue to False by default
    parser_input_file.add_argument('--continue', action='store_true',
        help="Resume previous computations; if there is a mac file from " + \
        "a previous work, last frontier places/boundaries will be reloaded.")
    parser_input_file.add_argument('--start_prop', nargs='?', default=None)
    parser_input_file.add_argument('--inv_prop', nargs='?', default=None)

    parser_input_file.set_defaults(func=launch_researchs)


    # subparser: Sort solutions in alphabetical order in place
    # Solution file (complete or not)
    parser_solutions_sort = subparsers.add_parser('sort_solutions',
                                                  help=launch_sort.__doc__)
    parser_solutions_sort.add_argument('path',
        help="Solution file or directory with solution files " + \
        "(output of 'compute_macs' command).")
    parser_solutions_sort.set_defaults(func=launch_sort)


    # subparser: Representation of the trajectories of MACs in a complete file.
    # Model file (xml : cadbiom language)
    # Solution file (cam_complete)
    parser_trajectories = subparsers.add_parser(
        'traj_2_graph',
        help=traj_2_graph.__doc__,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser_trajectories.add_argument('chart_file',
        help="bcx model file.")
    parser_trajectories.add_argument('sol_file',
        help="Complete solution file or directory with solution files " + \
        "(output of 'compute_macs' command).")
    parser_trajectories.add_argument('--output', action=ReadableDir,
        nargs='?', default='graphs/',
        help="Output directory for GraphML files.")
    parser_trajectories.set_defaults(func=traj_2_graph)


    # subparser: Decompilation of trajectories of MACs in a complete file/dir.
    # Model file (xml : cadbiom language)
    # Solution file (cam_complete)
    parser_traj_2_json = subparsers.add_parser(
        'traj_2_json',
        help=traj_2_json.__doc__,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser_traj_2_json.add_argument('chart_file',
        help="bcx model file.")
    parser_traj_2_json.add_argument('path',
        help="Complete solution file or directory with solution files " + \
        "(*cam_complete.txt files) generated with the 'compute_macs' command.")
    parser_traj_2_json.add_argument('--output', action=ReadableDir,
        nargs='?', default='decompiled_solutions/',
        help="Directory for newly created files.")
    parser_traj_2_json.add_argument('--no_conditions', action='store_true',
        help="Don't export conditions of transitions. This allows " + \
        "to have only places/entities that are used inside trajectories; " + \
        "thus, inhibitors nodes are not present in the json file")
    parser_traj_2_json.set_defaults(func=traj_2_json)


    # subparser: Merge solutions to a csv file
    # Solution file (cam)
    # Output (csv)
    parser_merge_cams = subparsers.add_parser(
        'merge_cams',
        help=merge_cams.__doc__,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )
    parser_merge_cams.add_argument('solutions_directory', nargs='?',
        default='result/')
    parser_merge_cams.add_argument('--output', nargs='?',
        default='result/merged_cams.csv',
        help="CSV file: <Final property formula>;<cam>")
    parser_merge_cams.set_defaults(func=merge_cams)


    # subparser: Model comparison
    # 2 models
    parser_model_comparison = subparsers.add_parser(
        'model_comp',
        help=model_comp.__doc__,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )
    parser_model_comparison.add_argument('model_file_1',
        help="bcx model file.")
    parser_model_comparison.add_argument('model_file_2',
        help="bcx model file.")
    # Export graphs for the 2 models; default: false
    parser_model_comparison.add_argument('--graphs', action='store_true',
        help="Create two GraphML files from the given models.")
    parser_model_comparison.add_argument('--json', action='store_true',
        help="Create a summary dumped into a json file.")
    parser_model_comparison.add_argument('--output', action=ReadableDir,
        nargs='?', default='graphs/',
        help="Directory for created graphs files.")
    parser_model_comparison.set_defaults(func=model_comp)


    # subparser: Model infos
    # 1 model
    parser_model_info = subparsers.add_parser(
        'model_info',
        help=model_info.__doc__,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )
    parser_model_info.add_argument('model_file')
    # Filters
    group = parser_model_info.add_mutually_exclusive_group(required=True)
    # PS: Argparse doesn't allow to select a default value here
    group.add_argument('--default', action='store_true',
        help="Display quick description of the model "
        "(Number of places/entities, transitions, entity types, locations)")
    group.add_argument('--all_entities', action='store_true',
        help="Retrieve data for all places/entities of the model.")
    group.add_argument('--boundaries', action='store_true',
        help="Retrieve data only for the frontier places/boundaries of the model.")
    group.add_argument('--genes', action='store_true',
        help="Retrieve data only for the genes in the model.")
    # Outputs
    parser_model_info.add_argument('--csv', action='store_true',
        help="Create a CSV file containing data about previously filtered "
        "places/entities of the model.")
    parser_model_info.add_argument('--json', action='store_true',
        help="Create a JSON formated file containing data about previously "
        "filtered places/entities of the model, and a full summary about the "
        "model itself (boundaries, transitions, events, entities locations, "
        "entities types).")
    parser_model_info.add_argument('--output', action=ReadableDir,
        nargs='?', default='./',
        help="Directory for newly created files.")
    parser_model_info.set_defaults(func=model_info)


    # subparser: Model graph
    parser_model_graph = subparsers.add_parser(
        'model_graph',
        help=model_graph.__doc__,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )
    parser_model_graph.add_argument('model_file')
    # Additional data
    parser_model_graph.add_argument('--centralities', action='store_true',
        help="Get centralities for each node of the graph "
        "(degree, in_degree, out_degree, closeness, betweenness). "
        "Works in conjunction with the ``--json`` option.")
    # Outputs
    parser_model_graph.add_argument('--graph', action='store_true',
        help="Translate the model into a GraphML formated file which can "
        "be opened in Cytoscape.")
    parser_model_graph.add_argument('--json', action='store_true',
        help="Create a JSON formated file containing a summary of the graph "
        "based on the model.")
    parser_model_graph.add_argument('--json_graph', action='store_true',
        help="Create a JSON formated file containing the graph based on the "
        "model, which can be opened by Web applications.")
    parser_model_graph.add_argument('--output', action=ReadableDir,
        nargs='?', default='graphs/',
        help="Directory for newly created files.")
    parser_model_graph.set_defaults(func=model_graph)


    # Workaround for sphinx-argparse module that require the object parser
    # before the call of parse_args()
    if 'html' in sys.argv:
        return parser

    # get program args and launch associated command
    args = parser.parse_args()

    # Set log level
    cm.log_level(vars(args)['verbose'])

    # launch associated command
    args.func(args)