#!/usr/bin/python

import nilmtools.filter
import nilmdb.client
import numpy as np
import sys

def main():
    f = nilmtools.filter.Filter()
    parser = f.setup_parser("Copy a stream")

    # Parse arguments
    try:
        args = f.parse_args()
    except nilmtools.filter.MissingDestination as e:
        print "Source is %s (%s)" % (e.src, e.layout)
        print "Destination %s doesn't exist" % (e.dest)
        print "You could make it with a command like:"
        print "  nilmtool create", e.dest, e.layout
        raise SystemExit(1)

    # Copy metadata
    meta = f.client.stream_get_metadata(args.srcpath)
    f.check_dest_metadata(meta)

    # Copy all rows of data as ASCII strings
    extractor = nilmdb.client.Client(args.url).stream_extract
    inserter = nilmdb.client.Client(args.url).stream_insert_context
    for (start, end) in f.intervals():
        print "Processing", f.interval_string((start, end))
        with inserter(args.destpath, start, end) as insert_ctx:
            for row in extractor(args.srcpath, start, end):
                insert_ctx.insert(row + "\n")

if __name__ == "__main__":
    main()