#!/usr/bin/env python3
import json
import tempfile
import threading
import urllib.request
from pathlib import Path
from led_panel import Handler, ThreadingHTTPServer
import led_panel


def req(port, path, body=None):
    data = None
    headers = {}
    if body is not None:
        data = json.dumps(body).encode()
        headers['Content-Type'] = 'application/json'
    r = urllib.request.Request(f'http://127.0.0.1:{port}{path}', data=data, headers=headers)
    with urllib.request.urlopen(r, timeout=5) as resp:
        return json.loads(resp.read().decode())


def main():
    with tempfile.TemporaryDirectory() as td:
        root = Path(td)
        d = root / 'blue:wan'
        d.mkdir()
        (d / 'brightness').write_text('0')
        (d / 'max_brightness').write_text('1')
        (d / 'trigger').write_text('[none] timer')
        (d / 'delay_on').write_text('500')
        (d / 'delay_off').write_text('500')
        led_panel.LED_ROOT = root
        httpd = ThreadingHTTPServer(('127.0.0.1', 0), Handler)
        port = httpd.server_address[1]
        t = threading.Thread(target=httpd.serve_forever, daemon=True)
        t.start()
        try:
            leds = req(port, '/api/leds')
            assert leds['ok'] and leds['leds'][0]['name'] == 'blue:wan'
            b = req(port, '/api/brightness', {'name':'blue:wan','value':1})
            assert b['ok'] and (d / 'brightness').read_text() == '1'
            tr = req(port, '/api/trigger', {'name':'blue:wan','trigger':'timer'})
            assert tr['ok']
            assert (d / 'trigger').read_text() == 'timer'
            delay = req(port, '/api/delay', {'name':'blue:wan','field':'delay_on','value':123})
            assert delay['ok'] and (d / 'delay_on').read_text() == '123'
            print('OK: API write regression passed')
        finally:
            httpd.shutdown()

if __name__ == '__main__':
    main()