#!/usr/bin/env python3

import os
import requests
import sys
import time


SEPARATOR = ';'


def load_temps() -> str:
    base_url = 'https://webb.nasa.gov/content/webbLaunch/flightCurrentState2.0.json'
    timestamp = int(time.time())
    url = f'{base_url}?unique={timestamp}'
    result = requests.get(url)
    if result.status_code != 200:
        print(f'Could not load data. Status: {result.status_code}', file=sys.stderr)
        sys.exit(1)
    data = result.json()['currentState']
    cols = [
        timestamp,
        data['tempWarmSide1C'],
        data['tempWarmSide2C'],
        data['tempCoolSide1C'],
        data['tempCoolSide2C']
    ]
    return SEPARATOR.join((str(x) for x in cols))


def write_csv(line: str, file: os.PathLike = 'data.csv'):
    lines = []
    if not os.path.isfile(file):
        header = (
            'timestamp' +
            SEPARATOR +
            'tempWarmSide1C' +
            SEPARATOR +
            'tempWarmSide2C' +
            SEPARATOR +
            'tempCoolSide1C' +
            SEPARATOR +
            'tempCoolSide2C'
        )
        lines.append(header)
    lines.append(line)
    with open(file, mode='a') as f:
        f.write('\n'.join(lines) + '\n')


if __name__ == '__main__':
    data = load_temps()
    write_csv(data)