"""Export local workbook details or import a private quote snapshot into SQLite."""

import argparse
from contextlib import closing
import json
from pathlib import Path
import sqlite3
import sys

sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
from logistics_chat.quote_data import import_snapshot
from logistics_chat.quote_workbook import export_snapshot


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    source = parser.add_mutually_exclusive_group(required=True)
    source.add_argument('--xlsx', type=Path)
    source.add_argument('--snapshot', type=Path)
    parser.add_argument('--output', type=Path, help='New private snapshot output for --xlsx')
    parser.add_argument('--db', type=Path)
    parser.add_argument('--activate', action='store_true', help='Use this version as general US rates without expiry')
    args = parser.parse_args()
    if args.xlsx:
        if not args.output or args.db or args.output.exists():
            parser.error('--xlsx requires a new --output path, without --db')
        snapshot = export_snapshot(args.xlsx)
        with args.output.open('x', encoding='utf-8') as target:
            json.dump(snapshot, target, ensure_ascii=False, separators=(',', ':'))
        print(json.dumps({key:len(snapshot[key]) for key in ('rates','warehouses','postcodes','documents')}))
        return
    if not args.db or not args.db.is_file() or not args.snapshot.is_file() or args.snapshot.stat().st_size > 20*1024*1024:
        parser.error('Import requires an existing database and a private snapshot smaller than 20 MB')
    snapshot = json.loads(args.snapshot.read_text(encoding='utf-8-sig'))
    with closing(sqlite3.connect(args.db)) as connection, connection:
        print(json.dumps(import_snapshot(connection, snapshot, activate=args.activate)))


if __name__ == '__main__':
    main()