#!/usr/bin/env python3

"""Export Pacer data to InfluxDB"""

import datetime
import time
import sqlite3 as lite
import argparse
from influxdb import InfluxDBClient

def main(args):
    """Instantiate the connection to the InfluxDB client."""
    influx_db = InfluxDBClient(args.host, args.port, args.user, args.password, args.dbname)
    measurements = influx_db.get_list_measurements()
    time_stamp = 0
    lastdate = 0
    laststeps = 0
    if measurements != []:
        lastentry = influx_db.query('SELECT LAST("steps") FROM "steps"')
        points = lastentry.get_points('steps')
        lastdate = list(points)[0]['time']
        time_stamp = time.mktime(datetime.datetime.strptime(lastdate, '%Y-%m-%dT%H:%M:%SZ')
                         .timetuple())

        if time_stamp == datetime.datetime.now().timestamp() // 86400 * 86400 + time.timezone:
            points = lastentry.get_points('steps')
            laststeps = list(points)[0]['last']

    if args.verbose:
        print(f'last entry is {lastdate}, timestamp is {time_stamp}, \
        number of steps is {laststeps}\n')

    con = lite.connect(args.dbfile)
    with con:
        cur = con.cursor()
        cur.execute(f'SELECT recordedForDate,steps,distanceInMeters,activeTimeInSeconds,calories \
                     FROM dailyActivityLog \
                     WHERE recordedForDate >= {time_stamp} AND steps > {laststeps}')
        while True:
            row = cur.fetchone()
            if row is None:
                break
            mytime = datetime.datetime.fromtimestamp(row[0]).strftime('%Y-%m-%dT%H:%M:%SZ')
            data = [{"measurement":"steps",
                    "time":mytime,
                    "fields": {
                              "steps":row[1],
                              "distanceInMeters":row[2],
                              "activeTimeInSeconds":row[3],
                              "calories":row[4]
                              }
                    }]
            if args.verbose:
                print(f'writing data for {mytime}')
            influx_db.write_points(data)
        influx_db.close()

def parse_args():
    """Parse the args from main."""
    parser = argparse.ArgumentParser(
        description='Export Pacer data to InfluxDB')
    parser.add_argument('-v', '--verbose', required=False,
                        action="store_true",
                        help='verbose output')
    parser.add_argument('-H', '--host', type=str, required=False,
                        default='localhost',
                        help='hostname of InfluxDB http API')
    parser.add_argument('-u', '--user', type=str, required=False,
                        default='root',
                        help='username for InfluxDB http API')
    parser.add_argument('-p', '--password', type=str, required=False,
                        default='root',
                        help='passworid for InfluxDB http API')
    parser.add_argument('-P', '--port', type=int, required=False, default=8086,
                        help='port of InfluxDB http API')
    parser.add_argument('-n', '--dbname', type=str, required=True, default='demo',
                        help='InfluxDB database name')
    parser.add_argument('-f', '--dbfile', type=str, required=True, default='demo.db',
                        help='sqlite (pacer) database name')
    return parser.parse_args()

if __name__ == '__main__':
    main(parse_args())