const os = require('os');
const path = require('path');
const fsp = require('fs/promises');
const cfg = require('../src/config');
const store = require('../src/store/fileStore');
const units = require('../src/gcode/units');
const { ActiveState } = require('../src/active/activeState');

let tmp;
beforeEach(async () => {
  tmp = await fsp.mkdtemp(path.join(os.tmpdir(), 'fsvc-act-'));
  cfg.storageDir = tmp;
});
afterEach(async () => {
  await fsp.rm(tmp, { recursive: true, force: true });
});

test('Teaching: load(leer) → appendPoint → reload findet Zeile + Cursor', async () => {
  const a = new ActiveState();
  await a.load('teach_1'); // existiert nicht → leer angelegt
  expect(a.getState().lineCount).toBe(0);

  const pose = { x: 0, y: 300, z: 0, a: Math.PI / 2, b: -Math.PI / 2, c: 0, e: 0 };
  const r = await a.appendPoint(pose, 1000);
  expect(r.index).toBe(0);
  expect(r.line).toContain('a90.00'); // in Grad gespeichert

  const b = new ActiveState();
  await b.load('teach_1');
  expect(b.getState().lineCount).toBe(1);
  expect(b.getState().cursor).toBe(0);
});

test('Playback: stepping liefert driver-native (Radian) Zeilen, Grenzen werfen', async () => {
  await store.write('play_1', {
    name: 'Play 1',
    lines: [
      'G90 G1 x0 y300 z0 a90.00 b-90.00 c0.00 e0.00 f1000 ;1',
      'G90 G1 x10 y300 z0 a0.00 b-90.00 c0.00 e0.00 f1000 ;2',
    ],
  });
  const a = new ActiveState();
  await a.load('play_1');

  const first = await a.first();
  expect(first.cursor).toBe(0);
  expect(first.line).not.toMatch(/;/);
  const aVal = Number(first.line.split(/\s+/).find((t) => t.startsWith('a')).slice(1));
  expect(aVal).toBeCloseTo(Math.PI / 2, 4);

  expect((await a.next()).cursor).toBe(1);
  await expect(a.next()).rejects.toThrow(); // über das Ende → CURSOR_OUT_OF_RANGE
});

test('Cursor liegt im .json-Sidecar, .gcode bleibt sauber (kein !-Marker)', async () => {
  await store.write('cur_1', {
    name: 'Cur',
    lines: [
      'G90 G1 x0 y0 z0 a0 b0 c0 e0 f1000 ;1',
      'G90 G1 x1 y0 z0 a0 b0 c0 e0 f1000 ;2',
    ],
  });
  const a = new ActiveState();
  await a.load('cur_1');
  await a.next(); // cursor → 1 (kein Persist)
  await a.appendLine('G4 P0.1'); // persistiert, cursor → 2

  const prog = await store.read('cur_1');
  // .gcode-Zeilen sind sauber — kein '!'-Marker
  const marked = prog.lines.filter(units.hasCursorMarker);
  expect(marked).toHaveLength(0);
  // Cursor steht im .json-Sidecar
  expect(prog.cursor).toBe(2);
  // Korrekte Zeile am Ende
  expect(units.splitComment(prog.lines[2]).code).toBe('G4 P0.1');
});

test('Stepping ohne aktives Programm → auto-lädt Default (leer → EMPTY_PROGRAM)', async () => {
  const a = new ActiveState();
  // next() lädt automatisch das Default-Programm; da es (im tmp) leer ist → EMPTY_PROGRAM
  await expect(a.next()).rejects.toMatchObject({ code: 'EMPTY_PROGRAM' });
  expect(a.programId).toBe(cfg.defaultProgramId); // Default wurde geladen
});

test('FShow ohne FLoad → auto-lädt Default und liefert volle Zeilenliste', async () => {
  await store.write(cfg.defaultProgramId, {
    name: 'log',
    lines: [
      'G90 G1 x0 y300 z0 a90.00 b-90.00 c0.00 e0.00 f1000 ;1',
      'G90 G1 x10 y300 z0 a0.00 b-90.00 c0.00 e0.00 f1000 ;2',
    ],
  });
  const a = new ActiveState();
  const state = await a.show(); // frisch, ohne vorheriges FLoad/FPoint
  expect(state.programId).toBe(cfg.defaultProgramId);
  expect(state.lineCount).toBe(2);
  expect(state.lines).toHaveLength(2); // volle Liste für die Anzeige
  expect(state.lines[0]).toContain('a90.00'); // in Grad, wie gespeichert
});

test('Stepping nach Neustart liest Default-Programm von Disk (FFirst ohne FLoad)', async () => {
  // Simuliert: log.gcode liegt auf Disk, frischer ActiveState (wie nach Container-Neustart)
  await store.write(cfg.defaultProgramId, {
    name: 'log',
    lines: [
      'G90 G1 x0 y300 z0 a90.00 b-90.00 c0.00 e0.00 f1000 ;1',
      'G90 G1 x10 y300 z0 a0.00 b-90.00 c0.00 e0.00 f1000 ;2',
    ],
    cursor: 1,
  });
  const a = new ActiveState();
  const r = await a.first(); // ohne vorheriges FLoad → Default wird geladen
  expect(a.programId).toBe(cfg.defaultProgramId);
  expect(r.cursor).toBe(0);
  expect(a.getState().lineCount).toBe(2);
});

test('FPoint ohne aktives Programm → auto-lädt Default-Programm (log)', async () => {
  const a = new ActiveState();
  // appendPoint lädt automatisch das Default-Programm und legt es leer an
  const r = await a.appendPoint({ x: 0, y: 0, z: 0, a: 0, b: 0, c: 0, e: 0 });
  expect(r.index).toBe(0);
  expect(a.programId).toBeTruthy(); // Default-Programm wurde geladen
});