"""

Part of the bsie module.
A copy of the license is provided with the project.
Author: Matthias Baumgartner, 2022
"""
# standard imports
import argparse
import sys
import typing

# bsie imports
from bsie.extractor import ExtractorBuilder
from bsie.lib import PipelineBuilder
from bsie.reader import ReaderBuilder
from bsie.utils import bsfs, errors

# exports
__all__: typing.Sequence[str] = (
    'main',
    )


## code ##

def main(argv):
    """Show information from BSIE."""
    parser = argparse.ArgumentParser(description=main.__doc__, prog='info')
    parser.add_argument('what', choices=('predicates', 'schema'),
        help='Select what information to show.')
    args = parser.parse_args(argv)

    # FIXME: Read reader/extractor configs from a config file
    # reader builder
    rbuild = ReaderBuilder({
        })
    # extractor builder
    ebuild = ExtractorBuilder([
        {'bsie.extractor.generic.path.Path': {}},
        {'bsie.extractor.generic.stat.Stat': {}},
        {'bsie.extractor.generic.constant.Constant': dict(
            tuples=[('http://bsfs.ai/schema/Entity#author', 'Me, myself, and I')],
            schema='''
                bse:author rdfs:subClassOf bsfs:Predicate ;
                    rdfs:domain bsfs:Entity ;
                    rdfs:range xsd:string ;
                    bsfs:unique "true"^^xsd:boolean .
                ''',
            )},
        ])
    # pipeline builder
    pbuild = PipelineBuilder(
        bsfs.Namespace('http://example.com/me/'), # not actually used
        rbuild,
        ebuild,
        )

    # build pipeline
    pipeline = pbuild.build()

    # show info
    if args.what == 'predicates':
        # show predicates
        for pred in pipeline.schema.predicates():
            print(pred.uri)
    elif args.what == 'schema':
        # show schema
        print(bsfs.schema.to_string(pipeline.schema))
    else:
        # args.what is already checked by argparse
        raise errors.UnreachableError()


## main ##

if __name__ == '__main__':
    main(sys.argv[1:])

## EOF ##