'use strict';
const { load, DEFAULTS } = require('../robot/RobotConfig');

function makeFs(content) {
  return {
    readFileSync: jest.fn(() => content)
  };
}

function makeFailFs() {
  return {
    readFileSync: jest.fn(() => { throw new Error('ENOENT'); })
  };
}

const log = { warn: jest.fn(), log: jest.fn(), error: jest.fn() };

const FULL_ROBOT_JSON = {
  kinematics: { type: 'arm3segmentlinearx' },
  motion: { defaultFeedrate: 2300, speedMode: 'legacy', speedModeOptions: ['legacy', 'correct'] },
  controllers: {
    base:  { ip: 'fluidNcBase.local',   port: 2300, protocol: 'telnet', axes: ['x', 'y', 'z']   },
    elbow: { ip: 'fluidNcEllbow.local', port: 5000, protocol: 'telnet', axes: ['a', null, null]  },
    hand:  { ip: 'fluidNcHand.local',   port: 5000, protocol: 'telnet', axes: ['c', 'e', 'b']   }
  },
  links: {
    Arm1:    { skeleton: { from: [0,0,0], to: [0,-250,0] } },
    Arm2:    { skeleton: { from: [0,0,0], to: [0,-250,0] } },
    Ellbow:  { skeleton: { from: [0,0,0], to: [90,0,0]   } },
    Hand:    { skeleton: { from: [0,0,0], to: [0,-35,0]  } },
    FingerA: { skeleton: { from: [0,0,0], to: [0,-60,0]  } }
  }
};

describe('RobotConfig.load — Vollständige robot.json', () => {
  let cfg;
  beforeEach(() => {
    cfg = load(makeFs(JSON.stringify(FULL_ROBOT_JSON)), {}, log);
  });

  test('kinematics.type aus robot.json', () => {
    expect(cfg.kinematics.type).toBe('arm3segmentlinearx');
  });

  test('l1/l2 aus links.Arm1/Arm2.skeleton.to[1] (Betrag)', () => {
    expect(cfg.kinematics.l1).toBe(250);
    expect(cfg.kinematics.l2).toBe(250);
  });

  test('l3 aus Hand + Finger (Handgelenk → Fingerspitze), NICHT Ellbow-Versatz', () => {
    expect(cfg.kinematics.l3).toBe(95);   // |Hand.to[1]|=35 + |FingerA.to[1]|=60
  });

  test('kinematics.l1/l2/l3 explizit in robot.json überschreiben die links-Ableitung', () => {
    const json = { ...FULL_ROBOT_JSON, kinematics: { type: 'arm3segmentlinearx', l1: 260, l2: 270, l3: 50 } };
    const c = load(makeFs(JSON.stringify(json)), {}, log);
    expect(c.kinematics.l1).toBe(260);
    expect(c.kinematics.l2).toBe(270);
    expect(c.kinematics.l3).toBe(50);
  });

  test('motion.defaultFeedrate aus robot.json', () => {
    expect(cfg.motion.defaultFeedrate).toBe(2300);
  });

  test('motion.speedMode aus robot.json', () => {
    expect(cfg.motion.speedMode).toBe('legacy');
  });

  test('motion.useSpeedCalc false für legacy', () => {
    expect(cfg.motion.useSpeedCalc).toBe(false);
  });

  test('controllers enthält alle drei Endpunkte', () => {
    expect(cfg.controllers.base.ip).toBe('fluidNcBase.local');
    expect(cfg.controllers.base.port).toBe(2300);
    expect(cfg.controllers.base.protocol).toBe('telnet');
    expect(cfg.controllers.elbow.port).toBe(5000);
    expect(cfg.controllers.hand.ip).toBe('fluidNcHand.local');
  });

  test('heartbeatInterval Default wenn nicht in robot.json', () => {
    expect(cfg.controllers.base.heartbeatInterval).toBe(DEFAULTS.controllers.base.heartbeatInterval);
    expect(cfg.controllers.elbow.heartbeatInterval).toBe(DEFAULTS.controllers.elbow.heartbeatInterval);
    expect(cfg.controllers.hand.heartbeatInterval).toBe(DEFAULTS.controllers.hand.heartbeatInterval);
  });

  test('axesByController gibt korrektes Array zurück', () => {
    expect(cfg.axesByController('base')).toEqual(['x', 'y', 'z']);
    expect(cfg.axesByController('elbow')).toEqual(['a', null, null]);
    expect(cfg.axesByController('hand')).toEqual(['c', 'e', 'b']);
  });

  test('axesByController gibt [] für unbekannten Key zurück', () => {
    expect(cfg.axesByController('unknown')).toEqual([]);
  });
});

describe('RobotConfig.load — Fehlerbehandlung', () => {
  test('fehlende robot.json → Defaults', () => {
    const cfg = load(makeFailFs(), {}, log);
    expect(cfg.kinematics.l1).toBe(DEFAULTS.kinematics.l1);
    expect(cfg.motion.defaultFeedrate).toBe(DEFAULTS.motion.defaultFeedrate);
    expect(cfg.controllers.base.ip).toBe(DEFAULTS.controllers.base.ip);
  });

  test('ungültiges JSON → Defaults', () => {
    const cfg = load(makeFs('{ not valid json }'), {}, log);
    expect(cfg.kinematics.type).toBe(DEFAULTS.kinematics.type);
  });

  test('fehlende links → kinematics-Defaults', () => {
    const json = { ...FULL_ROBOT_JSON };
    delete json.links;
    const cfg = load(makeFs(JSON.stringify(json)), {}, log);
    expect(cfg.kinematics.l1).toBe(DEFAULTS.kinematics.l1);
    expect(cfg.kinematics.l3).toBe(DEFAULTS.kinematics.l3);
  });
});

describe('RobotConfig.load — Env-Override', () => {
  test('ROBOT_DEFAULT_FEEDRATE überschreibt robot.json', () => {
    const env = { ROBOT_DEFAULT_FEEDRATE: '5000' };
    const cfg = load(makeFs(JSON.stringify(FULL_ROBOT_JSON)), env, log);
    expect(cfg.motion.defaultFeedrate).toBe(5000);
  });

  test('ROBOT_SPEED_MODE=correct setzt useSpeedCalc=true', () => {
    const env = { ROBOT_SPEED_MODE: 'correct' };
    const cfg = load(makeFs(JSON.stringify(FULL_ROBOT_JSON)), env, log);
    expect(cfg.motion.speedMode).toBe('correct');
    expect(cfg.motion.useSpeedCalc).toBe(true);
  });

  test('GRBL_BASE_IP überschreibt controller.base.ip', () => {
    const env = { GRBL_BASE_IP: '192.168.1.10' };
    const cfg = load(makeFs(JSON.stringify(FULL_ROBOT_JSON)), env, log);
    expect(cfg.controllers.base.ip).toBe('192.168.1.10');
  });

  test('GRBL_ELLBOW_IP überschreibt controller.elbow.ip', () => {
    const env = { GRBL_ELLBOW_IP: '192.168.1.11' };
    const cfg = load(makeFs(JSON.stringify(FULL_ROBOT_JSON)), env, log);
    expect(cfg.controllers.elbow.ip).toBe('192.168.1.11');
  });

  test('GRBL_HAND_IP überschreibt controller.hand.ip', () => {
    const env = { GRBL_HAND_IP: '192.168.1.12' };
    const cfg = load(makeFs(JSON.stringify(FULL_ROBOT_JSON)), env, log);
    expect(cfg.controllers.hand.ip).toBe('192.168.1.12');
  });
});

describe('RobotConfig.load — speedMode correct', () => {
  test('speedMode correct aus robot.json setzt useSpeedCalc=true', () => {
    const json = { ...FULL_ROBOT_JSON, motion: { ...FULL_ROBOT_JSON.motion, speedMode: 'correct' } };
    const cfg = load(makeFs(JSON.stringify(json)), {}, log);
    expect(cfg.motion.useSpeedCalc).toBe(true);
  });

  test('ROBOT_USE_SPEED_CALC=true setzt useSpeedCalc', () => {
    const env = { ROBOT_USE_SPEED_CALC: 'true' };
    const cfg = load(makeFs(JSON.stringify(FULL_ROBOT_JSON)), env, log);
    expect(cfg.motion.useSpeedCalc).toBe(true);
  });
});

describe('RobotConfig.load — heartbeatInterval', () => {
  test('heartbeatInterval aus robot.json überschreibt Default', () => {
    const json = {
      ...FULL_ROBOT_JSON,
      controllers: {
        ...FULL_ROBOT_JSON.controllers,
        base:  { ...FULL_ROBOT_JSON.controllers.base,  heartbeatInterval: 5000 },
        elbow: { ...FULL_ROBOT_JSON.controllers.elbow, heartbeatInterval: 30000 },
      }
    };
    const cfg = load(makeFs(JSON.stringify(json)), {}, log);
    expect(cfg.controllers.base.heartbeatInterval).toBe(5000);
    expect(cfg.controllers.elbow.heartbeatInterval).toBe(30000);
    // hand nicht gesetzt → Default
    expect(cfg.controllers.hand.heartbeatInterval).toBe(DEFAULTS.controllers.hand.heartbeatInterval);
  });

  test('fehlende heartbeatInterval → Default (10 000 ms)', () => {
    const cfg = load(makeFailFs(), {}, log);
    expect(cfg.controllers.base.heartbeatInterval).toBe(10000);
  });
});

describe('RobotConfig.load — emergencyStop (Shelly)', () => {
  test('DEFAULTS.controllers.emergencyStop hat protocol=shelly und url=null', () => {
    expect(DEFAULTS.controllers.emergencyStop.protocol).toBe('shelly');
    expect(DEFAULTS.controllers.emergencyStop.url).toBeNull();
    expect(DEFAULTS.controllers.emergencyStop.urlOn).toBeNull();
    expect(DEFAULTS.controllers.emergencyStop.urlStatus).toBeNull();
  });

  test('emergencyStop.url aus robot.json wird übernommen', () => {
    const shellyUrl = 'http://shelly.local/rpc/Switch.Set?id=0&on=false';
    const json = {
      ...FULL_ROBOT_JSON,
      controllers: {
        ...FULL_ROBOT_JSON.controllers,
        emergencyStop: { protocol: 'shelly', url: shellyUrl }
      }
    };
    const cfg = load(makeFs(JSON.stringify(json)), {}, log);
    expect(cfg.controllers.emergencyStop.protocol).toBe('shelly');
    expect(cfg.controllers.emergencyStop.url).toBe(shellyUrl);
  });

  test('emergencyStop.urlOn + urlStatus aus robot.json werden übernommen (IP statt .local)', () => {
    const base = 'http://192.168.0.99';
    const json = {
      ...FULL_ROBOT_JSON,
      controllers: {
        ...FULL_ROBOT_JSON.controllers,
        emergencyStop: {
          protocol:  'shelly',
          url:       `${base}/rpc/Switch.Set?id=0&on=false`,
          urlOn:     `${base}/rpc/Switch.Set?id=0&on=true`,
          urlStatus: `${base}/rpc/Switch.GetStatus?id=0`,
        }
      }
    };
    const cfg = load(makeFs(JSON.stringify(json)), {}, log);
    expect(cfg.controllers.emergencyStop.url).toBe(`${base}/rpc/Switch.Set?id=0&on=false`);
    expect(cfg.controllers.emergencyStop.urlOn).toBe(`${base}/rpc/Switch.Set?id=0&on=true`);
    expect(cfg.controllers.emergencyStop.urlStatus).toBe(`${base}/rpc/Switch.GetStatus?id=0`);
  });

  test('SHELLY_URL Env-Variable überschreibt url aus robot.json', () => {
    const envUrl  = 'http://192.168.0.99/rpc/Switch.Set?id=0&on=false';
    const cfg = load(makeFs(JSON.stringify(FULL_ROBOT_JSON)), { SHELLY_URL: envUrl }, log);
    expect(cfg.controllers.emergencyStop.url).toBe(envUrl);
  });

  test('fehlendes emergencyStop in robot.json → url=null (Default)', () => {
    // FULL_ROBOT_JSON hat kein emergencyStop → fällt auf Default zurück
    const cfg = load(makeFs(JSON.stringify(FULL_ROBOT_JSON)), {}, log);
    expect(cfg.controllers.emergencyStop.protocol).toBe('shelly');
    expect(cfg.controllers.emergencyStop.url).toBeNull();
    expect(cfg.controllers.emergencyStop.urlOn).toBeNull();
    expect(cfg.controllers.emergencyStop.urlStatus).toBeNull();
  });

  test('emergencyStop hat keine ip/port/axes/heartbeatInterval Felder', () => {
    const cfg = load(makeFailFs(), {}, log);
    expect(cfg.controllers.emergencyStop.ip).toBeUndefined();
    expect(cfg.controllers.emergencyStop.port).toBeUndefined();
    expect(cfg.controllers.emergencyStop.axes).toBeUndefined();
    expect(cfg.controllers.emergencyStop.heartbeatInterval).toBeUndefined();
  });
});