#!/usr/bin/env python
"""

This script scans a directory for files with companion '.json' files, then loads 
the data from the file, and attaches the .json contents using the 'extended_metadata'
system in the library

Sample call:
python load_data_with_metadata.py <api_key> <api_url> /data/folder "API Imports"

NOTE:  The upload method used requires the data library filesystem upload allow_library_path_paste
"""
import os
import shutil
import sys
import json
import time
import argparse

sys.path.insert( 0, os.path.dirname( __file__ ) )
from common import submit, display

def load_file(fullpath, api_key, api_url, library_id, library_folder_id, uuid_field=None):
    data = {}
    data['folder_id'] = library_folder_id
    data['file_type'] = 'auto'
    data['dbkey'] = ''
    data['upload_option'] = 'upload_paths'
    data['filesystem_paths'] = fullpath
    data['create_type'] = 'file'
    data['link_data_only'] = 'link_to_files'

    handle = open( fullpath + ".json" )
    smeta = handle.read()
    handle.close()
    ext_meta = json.loads(smeta)
    data['extended_metadata'] = ext_meta
    if uuid_field is not None and uuid_field in ext_meta:
        data['uuid'] = ext_meta[uuid_field]

    libset = submit(api_key, api_url + "libraries/%s/contents" % library_id, data, return_formatted = True)
    print libset


def main(api_key, api_url, in_folder, data_library, uuid_field=None):
    # Find/Create data library with the above name.  Assume we're putting datasets in the root folder '/'
    libs = display(api_key, api_url + 'libraries', return_formatted=False)
    library_id = None
    for library in libs:
        if library['name'] == data_library:
            library_id = library['id']
    if not library_id:
        lib_create_data = {'name':data_library}
        library = submit(api_key, api_url + 'libraries', lib_create_data, return_formatted=False)
        library_id = library['id']
    folders = display(api_key, api_url + "libraries/%s/contents" % library_id, return_formatted = False)
    for f in folders:
        if f['name'] == "/":
            library_folder_id = f['id']
    if not library_id or not library_folder_id:
        print "Failure to configure library destination."
        sys.exit(1)

    if os.path.isfile(in_folder):
        if os.path.exists(in_folder + ".json"):
            fullpath = os.path.abspath(in_folder)
            print "Loading", fullpath
            load_file(fullpath, api_key, api_url, library_id, library_folder_id, uuid_field)
    else:
        for fname in os.listdir(in_folder):
            fullpath = os.path.join(in_folder, fname)
            if os.path.isfile(fullpath) and os.path.exists(fullpath + ".json"):
                print "Loading", fullpath
                load_file(fullpath, api_key, api_url, library_id, library_folder_id, uuid_field)

if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument("api_key", help="API KEY")
    parser.add_argument('api_url', help='API URL')
    parser.add_argument("in_folder", help="Input Folder")
    parser.add_argument("data_library", help="Data Library")
    parser.add_argument("--uuid_field", help="UUID Field", default=None)
    args = parser.parse_args()
    main(args.api_key, args.api_url, args.in_folder, args.data_library, args.uuid_field)