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

from argparse import Namespace, ArgumentParser

from ..Cmd import Cmd

class CmdCheck(Cmd): # export

    def __init__(self) -> None:
        super().__init__('check', help='Check for circular dependencies between given modules')

    def add_arguments(self, parser: ArgumentParser) -> None:
        super().add_arguments(parser)
        parser.add_argument('module', nargs='*', help='Modules')
        parser.add_argument('-f', '--flavour', nargs='?', default = 'build')

    def _run(self, args: Namespace) -> None:
        graph = {}
        path = []
        self.app.read_dep_graph(args.module, args.flavour, graph)
        unvisited = list(graph.keys())
        temp = set()
        while len(unvisited) != 0:
            m = unvisited[0]
            self.app.debug('Checking circular dependency of', m)
            last = self.app.check_circular_deps(m, args.flavour, self.app.flip_graph(graph), unvisited, temp, path)
            if last is not None:
                self.app.debug('Found circular dependency below', m, ', last is', last)
                print('Found circular dependency in flavour', args.flavour, ':', ' -> '.join(path))
                exit(1)
        print('No circular dependency found for flavour', args.flavour, ' in modules:',
                ' '.join(args.module))
        exit(0)