'use strict';

const ShellyEmergencyStop = require('../robot/ShellyEmergencyStop');

const OFF_URL    = 'http://shelly.local/rpc/Switch.Set?id=0&on=false';
const ON_URL     = 'http://shelly.local/rpc/Switch.Set?id=0&on=true';
const STATUS_URL = 'http://shelly.local/rpc/Switch.GetStatus?id=0';

function makeHttpGetJson(data, statusCode = 200) {
  return jest.fn(() => Promise.resolve({
    ok: statusCode >= 200 && statusCode < 300,
    status: statusCode,
    data
  }));
}

function makeHttpGet(statusCode = 200) {
  return jest.fn(() => Promise.resolve({
    ok: statusCode >= 200 && statusCode < 300,
    status: statusCode
  }));
}

describe('ShellyEmergencyStop — Konstruktor', () => {
  test('url wird korrekt gesetzt', () => {
    const s = new ShellyEmergencyStop(OFF_URL);
    expect(s.url).toBe(OFF_URL);
  });

  test('_onUrl ersetzt on=false durch on=true', () => {
    const s = new ShellyEmergencyStop(OFF_URL);
    expect(s._onUrl).toBe(ON_URL);
  });

  test('_statusUrl zeigt auf Switch.GetStatus', () => {
    const s = new ShellyEmergencyStop(OFF_URL);
    expect(s._statusUrl).toBe(STATUS_URL);
  });

  test('null-URL → _offUrl, _onUrl und _statusUrl sind null', () => {
    const s = new ShellyEmergencyStop(null);
    expect(s._offUrl).toBeNull();
    expect(s._onUrl).toBeNull();
    expect(s._statusUrl).toBeNull();
  });

  test('Initialzustand ist ready', () => {
    const s = new ShellyEmergencyStop(OFF_URL);
    expect(s.state).toBe('ready');
    expect(s.error).toBeNull();
  });
});

describe('ShellyEmergencyStop — SenderInterface', () => {
  test('connect() gibt Instanz zurück', async () => {
    const s = new ShellyEmergencyStop(OFF_URL);
    await expect(s.connect()).resolves.toBe(s);
  });

  test('send() gibt false zurück (kein GCode-Empfänger)', () => {
    const s = new ShellyEmergencyStop(OFF_URL);
    expect(s.send('G1 X10')).toBe(false);
  });

  test('getStatus() enthält state und url', () => {
    const s = new ShellyEmergencyStop(OFF_URL);
    const st = s.getStatus();
    expect(st.state).toBe('ready');
    expect(st.url).toBe(OFF_URL);
  });

  test('alarmUnlock() gibt {ok:true, skipped:true} zurück', async () => {
    const s = new ShellyEmergencyStop(OFF_URL);
    await expect(s.alarmUnlock()).resolves.toEqual({ ok: true, skipped: true });
  });
});

describe('ShellyEmergencyStop — emergencyStop()', () => {
  test('ruft _offUrl auf', async () => {
    const httpGet = makeHttpGet(200);
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetFn: httpGet });
    await s.emergencyStop();
    expect(httpGet).toHaveBeenCalledWith(OFF_URL);
  });

  test('setzt state=stopped bei HTTP 200', async () => {
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetFn: makeHttpGet(200) });
    const result = await s.emergencyStop();
    expect(result.ok).toBe(true);
    expect(s.state).toBe('stopped');
    expect(s.error).toBeNull();
  });

  test('setzt state=error bei HTTP 500', async () => {
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetFn: makeHttpGet(500) });
    const result = await s.emergencyStop();
    expect(result.ok).toBe(false);
    expect(s.state).toBe('error');
    expect(s.error).toBe('HTTP 500');
  });

  test('setzt state=error bei Netzwerkfehler', async () => {
    const httpGet = jest.fn(() => Promise.reject(new Error('ECONNREFUSED')));
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetFn: httpGet });
    const result = await s.emergencyStop();
    expect(result.ok).toBe(false);
    expect(result.error).toBe('ECONNREFUSED');
    expect(s.state).toBe('error');
  });

  test('gibt {ok:false} wenn url null ist', async () => {
    const s = new ShellyEmergencyStop(null);
    const result = await s.emergencyStop();
    expect(result.ok).toBe(false);
    expect(result.error).toMatch(/no shelly url/);
  });
});

describe('ShellyEmergencyStop — powerOn()', () => {
  test('ruft _onUrl auf (on=true)', async () => {
    const httpGet = makeHttpGet(200);
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetFn: httpGet });
    await s.powerOn();
    expect(httpGet).toHaveBeenCalledWith(ON_URL);
  });

  test('setzt state=ready bei HTTP 200', async () => {
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetFn: makeHttpGet(200) });
    const result = await s.powerOn();
    expect(result.ok).toBe(true);
    expect(s.state).toBe('ready');
  });

  test('setzt state=error bei HTTP 503', async () => {
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetFn: makeHttpGet(503) });
    const result = await s.powerOn();
    expect(result.ok).toBe(false);
    expect(s.state).toBe('error');
  });

  test('gibt {ok:false} wenn url null ist', async () => {
    const s = new ShellyEmergencyStop(null);
    const result = await s.powerOn();
    expect(result.ok).toBe(false);
  });
});

describe('ShellyEmergencyStop — getArmed()', () => {
  const SHELLY_ON  = { id: 0, source: 'WS_in', output: true,  apower: 15.5, voltage: 234.9, freq: 50.1, current: 0.144 };
  const SHELLY_OFF = { id: 0, source: 'WS_in', output: false, apower: 0.0,  voltage: 235.2, freq: 50.1, current: 0.000 };

  test('ruft _statusUrl (Switch.GetStatus?id=0) auf', async () => {
    const httpGetJson = makeHttpGetJson(SHELLY_ON);
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetJsonFn: httpGetJson });
    await s.getArmed();
    expect(httpGetJson).toHaveBeenCalledWith(STATUS_URL);
  });

  test('armed=true wenn output:true', async () => {
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetJsonFn: makeHttpGetJson(SHELLY_ON) });
    const result = await s.getArmed();
    expect(result.ok).toBe(true);
    expect(result.armed).toBe(true);
    expect(result.voltage).toBe(234.9);
    expect(result.power).toBe(15.5);
  });

  test('armed=false wenn output:false', async () => {
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetJsonFn: makeHttpGetJson(SHELLY_OFF) });
    const result = await s.getArmed();
    expect(result.ok).toBe(true);
    expect(result.armed).toBe(false);
  });

  test('armed=false bei HTTP-Fehler (503)', async () => {
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetJsonFn: makeHttpGetJson(null, 503) });
    const result = await s.getArmed();
    expect(result.ok).toBe(false);
    expect(result.armed).toBe(false);
  });

  test('armed=false bei Netzwerkfehler', async () => {
    const httpGetJson = jest.fn(() => Promise.reject(new Error('ECONNREFUSED')));
    const s = new ShellyEmergencyStop(OFF_URL, { httpGetJsonFn: httpGetJson });
    const result = await s.getArmed();
    expect(result.ok).toBe(false);
    expect(result.armed).toBe(false);
    expect(result.error).toBe('ECONNREFUSED');
  });

  test('armed=false wenn url null ist', async () => {
    const s = new ShellyEmergencyStop(null);
    const result = await s.getArmed();
    expect(result.ok).toBe(false);
    expect(result.armed).toBe(false);
    expect(result.error).toMatch(/no shelly url/);
  });
});