import argparse
import configparser
import ezdxf
import os
import sys

"""
Dieses Programm:
- liest die dxf Datei und holt sich von den Layern der dxf Datei die Positionen  
+ der Motoren, Sensoren und Aktoren
+ der Unterverteiler
+ der Polylinien der Kabelpritschen
- erzeugt daraus eine .json Datei im Work Ordner

"""
def write_results(jsnResults, outdir, filename):
    """ write results to a json file
    """
    print("writing results to a json file ...")
    outfile = os.path.join(outdir, filename)
    with open(outfile, 'w', encoding='utf-8') as fh:
        fh.write(jsnResults)
    print("done")

def get_input_positions(doc):
    """hole alle Positionen der Eingänge 
    """
    pass

def get_output_positions(doc):
    """hole alle Positionen der Ausgänge 
    """
    pass

def get_rack_positions(doc):
    """hole alle Positionen aller Kabelpritschen 
    """
    pass

def get_dxf_file(filepath):
    """hole das dxf file 
    """
    try:
        doc = ezdxf.readfile(filepath)
    except IOError:
        print(f"Not a DXF file or a generic I/O error.")
        sys.exit(1)
    except ezdxf.DXFStructureError:
        print(f"Invalid or corrupted DXF file.")
        sys.exit(2)
    return doc

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='fetches the x/y positions from a dxf file', prog='getpositions')
    parser.add_argument('-f', '--filename', action='store', default="ST_6300_Steuerungstestlayout1_neueBloecke.dwg", help='which file should be fetched', metavar='myfile.dwg')
    parser.add_argument('-i', '--input', action='store_true', help='fetch all position of inputs')
    parser.add_argument('-o', '--output', action='store_true', help='fetch all positions of outputs')
    parser.add_argument('-r', '--rack', action='store_true', help='fetch all positions of all cable racks')

    args = parser.parse_args()

    out_dir = os.environ.get('PROJECT_DATA')
    work_dir = os.environ.get('PROJECT_WORK')
    filename = args.filename

    doc = get_dxf_file(os.path.join(work_dir, filename))

    res = dict()
    if args.input:
        res = get_input_positions(doc)
    if args.output:
        get_input_positions(doc)
    if args.rack:
        get_input_positions(doc)
    
    else:
        parser.print_help()