"""Check a filled-in review form and turn it into situations.json.

  python3 apply_review.py review/k60-s24

Reads candidates.json and review.json from that directory. If the form is complete and consistent, it
writes situations.json there and exits 0. Otherwise it prints every problem at once, writes nothing,
and exits 1.
"""
import datetime, json, pathlib, sys
import review_format as rf


def main(argv):
    if len(argv) != 2:
        print(__doc__.strip())
        return 2
    run_dir = pathlib.Path(argv[1])
    cand_path, form_path = run_dir / 'candidates.json', run_dir / 'review.json'
    for p in (cand_path, form_path):
        if not p.exists():
            print(f'{p} does not exist. Run review.py first, or check the directory name.')
            return 1
    candidates = json.loads(cand_path.read_text(encoding='utf-8'))
    try:
        form = json.loads(form_path.read_text(encoding='utf-8'))
    except json.JSONDecodeError as e:
        print(f'{form_path} is not valid JSON: line {e.lineno}, column {e.colno}: {e.msg}.')
        print('Common causes: a missing comma between fields, a trailing comma before } or ], or a quote left open.')
        return 1

    errors, warnings, result = rf.validate(candidates, form)
    for w in warnings:
        print(f'warning: {w}')
    if errors:
        print(f'\n{len(errors)} problem(s) to fix in {form_path}; nothing was written:')
        for e in errors:
            print(f'  - {e}')
        return 1

    result['applied'] = datetime.datetime.now().astimezone().isoformat(timespec='seconds')
    out = run_dir / 'situations.json'
    out.write_text(json.dumps(result, indent=1, ensure_ascii=False), encoding='utf-8')
    c = result['counts']
    print(f'\n{out}: {c["situations"]} situations from {c["accepted"]} accepted and {c["merged"]} merged '
          f'candidates; {c["rejected"]} rejected, {c["skipped"]} skipped.')
    for s in result['situations']:
        print(f'  {s["id"]} ({s["size"]} scenes, {s["stories"]} stories, from {"+".join(s["from"])}): {s["situation"]}')
    return 0


if __name__ == '__main__':
    sys.exit(main(sys.argv))