#!/usr/bin/env python3
"""Translate S3-owned state classifications without redefining their meaning."""
import argparse
import json
import sys
import uuid
from pathlib import Path
from receiver import read_json, instant, STATES


def translate(report, contract):
    if (set(report) != {'schema', 'cluster_uid', 'evaluated_at', 'signals', 'transport',
                       'guarantees', 'threshold_status', 'healthy'}
            or report['schema'] != 'railiance-platform.assurance-signal.v1'
            or report['cluster_uid'] != 'a553c742-0115-43d4-99a4-a5ca56fe0786'
            or report['transport'] != 'unmonitored'
            or report['guarantees'] != 'unsupported'
            or report['threshold_status'] != 'local-diagnostic-only'
            or set(report['signals']) != set(contract['signals'])):
        raise ValueError('unexpected platform report')
    instant(report['evaluated_at'])
    states = {}
    for name, value in report['signals'].items():
        if (set(value) != {'state', 'owner'} or value['state'] not in STATES
                or value['owner'] not in ('railiance-platform', 'rapp-postgres')):
            raise ValueError('unexpected signal')
        states[name] = value['state']
    if type(report['healthy']) is not bool or report['healthy'] != all(s == 'healthy' for s in states.values()):
        raise ValueError('inconsistent summary')
    return dict(schema='railiance-telemetry.signal.v1', id=str(uuid.uuid4()),
        stream=contract['stream'], producer=contract['producer'],
        observed_at=report['evaluated_at'], states=states)


if __name__ == '__main__':
    p = argparse.ArgumentParser(description=__doc__)
    p.add_argument('--contract', required=True, type=Path)
    p.add_argument('report', type=Path)
    a = p.parse_args()
    try:
        print(json.dumps(translate(read_json(a.report), read_json(a.contract))))
    except (OSError, ValueError, KeyError, TypeError, AttributeError):
        print(json.dumps({'status': 'rejected', 'error': 'invalid-platform-report'}))
        sys.exit(2)