#! /usr/bin/env python3
#
# Check for updates on Arvados, pull the TTL and push into Virtuoso
#
# You can run this in a Guix container with
#
#    ~/opt/guix/bin/guix environment -C guix --ad-hoc raptor2 python python-requests curl --network -- python3 ./scripts/update_virtuoso/check_for_updates.py cache.txt dba dba
#
# Note you'll need to run from the root dir. Remove the ./cache.txt file if you want to force an update.
#
import requests
import time
import sys
import os.path
import subprocess

assert(len(sys.argv)==4)
fn = sys.argv[1]
user = sys.argv[2]
pwd = sys.argv[3]

force = False
if fn== "--force":
  force = True

no_cache = False
if fn == "--no-cache":
  no_cache = True
  print("Skipping cache check and download of metadata.ttl")

scriptdir = os.path.dirname(os.path.realpath(__file__))
print(scriptdir)
basedir = os.path.dirname(os.path.dirname(scriptdir))

def upload(fn):
    # Upload into Virtuoso using CURL
    # cmd = "curl -X PUT --digest -u dba:dba -H Content-Type:text/turtle -T metadata.ttl -G http://localhost:8890/sparql-graph-crud-auth --data-urlencode graph=http://covid-19.genenetwork.org/graph".split(" ")
    # print("DELETE "+fn)
    # cmd = ("curl --digest --user dba:%s --verbose --url -G http://sparql.genenetwork.org/sparql-graph-crud-auth --data-urlencode graph=http://covid-19.genenetwork.org/graph -X DELETE" % pwd).split(" ")

    print("VALIDATE "+fn)
    cmd = f"rapper -i turtle {fn}"
    print(cmd)
    p = subprocess.Popen(cmd.split(" "),stdout=subprocess.PIPE,stderr=subprocess.PIPE)
    out, err = p.communicate()
    if p.returncode != 0:
      print(out,err)
    assert(p.returncode == 0)

    print("UPLOADING "+fn)
    cmd = ("curl -X PUT --digest -u dba:%s -H Content-Type:text/turtle -T %s -G http://sparql.genenetwork.org/sparql-graph-crud-auth --data-urlencode graph=http://covid-19.genenetwork.org/graph/%s" % (pwd, fn, os.path.basename(fn)) )
    print(cmd)
    p = subprocess.Popen(cmd.split(" "),stdout=subprocess.PIPE,stderr=subprocess.PIPE)
    out, err = p.communicate()
    print(out,err)
    assert(p.returncode == 0)

url = 'https://collections.lugli.arvadosapi.com/c=lugli-4zz18-z513nlpqm03hpca/mergedMetadata.ttl'
# --- Fetch headers from TTL file on Arvados
#  curl --head https://download.lugli.arvadosapi.com/c=lugli-4zz18-z513nlpqm03hpca/_/mergedmetadata.ttl
r = requests.head(url)
print(r.headers)
if not force and not no_cache:
  print(r.headers['Last-Modified'])

  # --- Convert/validate time stamp
  # ValueError: time data 'Tue, 21 Apr 2020 23:47:43 GMT' does not match format '%a %b %d %H:%M:%S %Y'
  last_modified_str = r.headers['Last-Modified']
  t_stamp = time.strptime(last_modified_str,"%a, %d %b %Y %H:%M:%S %Z" )
  print(t_stamp)

# OK, it works, now check last stored value in the cache
stamp = None
if os.path.isfile(fn):
    file = open(fn,"r")
    stamp = file.read()
    file.close

if force or no_cache or stamp != last_modified_str:
    print("Delete graphs")
    for graph in ["labels.ttl", "metadata.ttl", "countries.ttl"]:
        cmd = ("curl --digest -u dba:%s --verbose --url http://127.0.0.1:8890/sparql-graph-crud-auth?graph=http://covid-19.genenetwork.org/graph/%s -X DELETE" % (pwd, graph))
        print(cmd)
        p = subprocess.Popen(cmd.split(" "))
        output = p.communicate()[0]
        print(output)
        # assert(p.returncode == 0) -> may prevent update

    upload(basedir+"/semantic_enrichment/labels.ttl")
    upload(basedir+"/semantic_enrichment/countries.ttl")

    if force or not no_cache:
        print("Fetch metadata TTL")
        r = requests.get(url)
        assert(r.status_code == 200)
        with open("metadata.ttl", "w") as f:
            f.write(r.text)
            f.close
    upload("metadata.ttl")
    if not force and not no_cache:
        with open(fn,"w") as f:
            f.write(last_modified_str)
else:
    print("Metadata is up to date")