#!/bin/python3

import os
import sys
import json
import psycopg2
import requests

from datetime import datetime
from datetime import timedelta
from tzlocal import get_localzone


apiKey = os.environ['el_elvia_token']
apiUrl = "https://elvia.azure-api.net/customer/metervalues/api/v1/metervalues"

pg_db = os.environ['el_pg_db']
pg_host = os.environ['el_pg_host']
pg_table = "elvia"

startTime = datetime.now(get_localzone()) - timedelta(days = 2)
startTime = startTime.isoformat('T')

endTime = datetime.now(get_localzone()).isoformat('T')


### Get the data
try:
    url = apiUrl + "?startTime=" + startTime + "&endTime=" + endTime

    # Request headers
    hdr = {
        'Cache-Control': 'no-cache',
        'Authorization': "Bearer " + apiKey,
    }

    response = requests.get(url, headers=hdr)
    if response.status_code != 200:
        print(response.status_code)
        print("Oh shit")
        response.raise_for_status()

except Exception as e:
    print("oh lol")
    sys.exit(e)

data = response.json()
print("Got "+ str(len(data['meteringpoints'][0]['metervalue']['timeSeries'])) +" items from between "+ startTime + " and " + endTime)

### insert data into database

values = []
for item in data['meteringpoints'][0]['metervalue']['timeSeries']:
    # Only deal with verified items.
    if item['verified']:
        values.append((data['meteringpoints'][0]['meteringPointId'], item['startTime'], item['endTime'], item['value'], item['uom'], item['production']))

# connect to database
conn = psycopg2.connect(database=pg_db, host=pg_host)
cur = conn.cursor()

# count rows before we start
cur.execute("SELECT COUNT(*) FROM " + pg_table)
before = cur.fetchone()

# insert data
try:
    cur.executemany("INSERT INTO " + pg_table + " VALUES(%s,%s,%s,%s,%s,%s) ON CONFLICT (startTime,endTime) DO NOTHING", values)
    conn.commit()
except Exception as e:
    conn.rollback()
    raise e

# count rows after we finnish
cur.execute("SELECT COUNT(*) FROM " + pg_table)
after = cur.fetchone()

# count *new* rows
newRows = after[0] - before[0]

# close connection
conn.close()

print("Successfully inserted " + str(newRows) + " records into the database")