# encoding: utf-8
"""
Console script entry points for CLI tools.
"""
__copyright__ = "Copyright (C) 2015 University of Wisconsin SSEC. All rights reserved."

import io
import os
import logging
from datetime import datetime

from edosl0util import split, trunc, stream, merge, jpssrdr

LOG = logging


def _timestamp(v):
    return datetime.strptime(v, '%Y-%m-%d %H:%M:%S')


def _default_parser():
    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument('-v', '--verbose', action='store_true')
    return parser


def _configure_logging(args):
    level = logging.DEBUG if getattr(args, 'verbose', False) else logging.WARN
    logging.basicConfig(level=level, format='%(message)s')


def cmd_trunc():
    parser = _default_parser()
    parser.add_argument('-o', '--output')
    parser.add_argument('filename')
    parser.add_argument('start', type=_timestamp, help='YYYY-MM-DD HH:MM:SS')
    parser.add_argument('end', type=_timestamp, help='YYYY-MM-DD HH:MM:SS')
    args = parser.parse_args()
    _configure_logging(args)

    output = args.output or os.path.basename(args.filename) + '.trunc'
    with io.open(output, 'wb') as fptr:
        for pkt in trunc.trunc_file(args.filename, args.start, args.end):
            fptr.write(pkt.bytes())


def cmd_split():
    parser = _default_parser()
    parser.add_argument('--minutes', type=int, default=6)
    parser.add_argument('filepath')
    args = parser.parse_args()
    _configure_logging(args)

    for stamp, fpath in split.split_file(args.filepath, args.minutes, os.getcwd()):
        LOG.info('wrote bucket {} to {}'.format(stamp.isoformat(), fpath))


def cmd_info():
    parser = _default_parser()
    parser.add_argument('filepath')
    args = parser.parse_args()
    _configure_logging(args)

    num_packets = 0
    packets = stream.PacketStream(io.open(args.filepath, 'rb'))
    first = datetime(3000, 1, 1)
    last = datetime(1970, 1, 1)
    while True:
        try:
            packet = packets.next()
            num_packets += 1
        except stream.PacketTooShort as err:
            LOG.warn("corrupt packet stream after %d packets: %s",
                     num_packets, err)
            break
        except StopIteration:
            break
        if packet.stamp:
            first = min(packet.stamp, first)
            last = max(packet.stamp, last)
    total = 0
    first, last, info = packets.info()
    LOG.info("First: %s", first)
    LOG.info("Last: %s", last)
    for apid, dat in info.items():
        total += dat['count']
        LOG.info("%d: count=%d missing=%d", apid, dat['count'], dat['num_missing'])
    LOG.info("{} total packets".format(total))


def cmd_merge():
    parser = _default_parser()
    parser.add_argument('-o', '--output', default='out.pds')
    parser.add_argument('pds', nargs='+')
    args = parser.parse_args()
    _configure_logging(args)

    merge.merge_files(args.pds, args.output)


def cmd_rdr2l0():
    parser = _default_parser()
    parser.add_argument('-o', '--output')
    parser.add_argument('-f', '--skipfill', action='store_true')
    parser.add_argument('sensor', choices=('viirs', 'atms', 'cris'))
    parser.add_argument('rdr')
    args = parser.parse_args()
    _configure_logging(args)

    output = args.output or args.rdr + '.pds'
    with io.open(output, 'wb') as fptr:
        for packet in jpssrdr.convert_to_nasa_l0(args.sensor, args.rdr):
            fptr.write(packet)