import os
import csv
import requests

dir = os.path.dirname(os.path.abspath(__file__))

destination_dir = os.path.join(dir, '../external-templates')
sources_list = os.path.join(dir, '../sources.csv')

# Downloads the file from a given URL, to the local destination
def download(url: str, filename: str):
    file_path = os.path.join(destination_dir, filename)
    r = requests.get(url, stream=True)
    if r.ok:
        print('saving to', os.path.abspath(file_path))
        with open(file_path, 'wb') as f:
            for chunk in r.iter_content(chunk_size=1024 * 8):
                if chunk:
                    f.write(chunk)
                    f.flush()
                    os.fsync(f.fileno())
    else:  # HTTP status code 4XX/5XX
        print('Download failed: status code {}\n{}'.format(r.status_code, r.text))

# Gets list of URLs to download from CSV file
def get_source_list():
  sources=[]
  with open(sources_list, mode='r') as file:
      csvFile = csv.reader(file)
      for lines in csvFile:#
          sources.append(lines)
  return sources

# Create destination folder if not yet present
if not os.path.exists(destination_dir):
  os.makedirs(destination_dir)

# For each source, download the templates JSON file
for sourceUrl in get_source_list():
  download(sourceUrl[1], sourceUrl[0] + '.json')