"""An example program that uses the elsapy module"""

from elsapy.elsclient import ElsClient
from elsapy.elsprofile import ElsAuthor, ElsAffil
from elsapy.elsdoc import FullDoc, AbsDoc
from elsapy.elssearch import ElsSearch
import json
    
## Load configuration
con_file = open("config.json")
config = json.load(con_file)
con_file.close()

## Initialize client
client = ElsClient(config['apikey'])

def get_doc(doi):
    ## ScienceDirect (full-text) document example using DOI
    doi_doc = FullDoc(doi = doi)
    if doi_doc.read(client):
        print ("doi_doc.title: ", doi_doc.title)
        doi_doc.write()  
        return doi 
    else:
        return None