#!/usr/bin/env python
import os
import sys
import glob
import logging
from datetime import datetime

from metobs.data import wind_vector_components
from aosstower.record import RecordV1, LineParseError
from aosstower.model import RrdModel, ModelError

LOG = logging

if __name__ == '__main__':

    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument('-o', '--outdb', dest='outdb', default='out.db', 
            help='Destination RRD database. Must not exist')
    argdt = lambda v: datetime.strptime(v, '%Y-%m-%d')
    parser.add_argument('-s', '--db-start', type=argdt, default=datetime.now(),
            help='Reference start date for database (YYYY-MM-DD)')
    parser.add_argument('-d', '--db-days', type=int, default=365,
            help='Size of DB in days')
    parser.add_argument('files', nargs='?', type=argparse.FileType('r'),
            default=sys.stdin, 
            help="List of time sorted input data files")

    args = parser.parse_args()

    logging.basicConfig(level=logging.INFO)

    assert not os.path.exists(args.outdb)
    rrd = RrdModel(args.outdb)
    rrd.initialize(args.db_start, days=args.db_days)
    LOG.info("initilized %s", args.outdb)

    for each in args.files.readlines():
        fpath = each.strip()
        if not os.path.exists(fpath):
            LOG.warn("%s does not exist", fpath)
            continue

        LOG.info("adding %s", fpath)
        for line in open(fpath).readlines():
            if not line.strip():
                continue
            try:
                record = RecordV1(line)
            except LineParseError as err:
                LOG.error(str(err))
                continue

            windspd = float(record['wind_speed'])
            winddir = float(record['wind_dir'])
            u_e, u_n, spd = wind_vector_components(windspd, winddir)
            record['winddir_east'] = u_e
            record['winddir_north'] = u_n
            record['wind_speed'] = spd

            try:
                rrd.add_record(record)
            except ModelError:
                LOG.exception("Could not insert: %s", record)