jest.mock('@angular/common/http', () => ({
  HttpClient: class {},
  HttpErrorResponse: class {},
}));

import {
  GraphProjectionDims,
  GraphSeries,
  isValidEventWindow,
  projectGraphPoints,
} from '../../frontend/src/app/features/scoreboard/scoreboard.pure';

const DIMS: GraphProjectionDims = {
  width: 800,
  height: 320,
  padL: 40,
  padR: 16,
  padT: 16,
  padB: 28,
};

const innerW = DIMS.width - DIMS.padL - DIMS.padR;
const innerH = DIMS.height - DIMS.padT - DIMS.padB;
const xMin = DIMS.padL;
const xMax = DIMS.padL + innerW;
const yMin = DIMS.padT;
const yMax = DIMS.padT + innerH;

function parsePoints(str: string): Array<{ x: number; y: number }> {
  if (!str) return [];
  return str.split(' ').map((pair) => {
    const [xs, ys] = pair.split(',');
    return { x: Number(xs), y: Number(ys) };
  });
}

describe('isValidEventWindow', () => {
  it('returns false when end is before start', () => {
    expect(
      isValidEventWindow('2026-07-23T00:00:00.000Z', '2026-07-22T00:00:00.000Z'),
    ).toBe(false);
  });

  it('returns false when start equals end', () => {
    expect(
      isValidEventWindow('2026-07-23T00:00:00.000Z', '2026-07-23T00:00:00.000Z'),
    ).toBe(false);
  });

  it('returns false for non-finite Date strings', () => {
    expect(isValidEventWindow('not a date', '2026-07-22T00:00:00.000Z')).toBe(false);
    expect(isValidEventWindow('2026-07-23T00:00:00.000Z', 'garbage')).toBe(false);
  });

  it('returns false for null/undefined', () => {
    expect(isValidEventWindow(null, '2026-07-22T00:00:00.000Z')).toBe(false);
    expect(isValidEventWindow('2026-07-23T00:00:00.000Z', undefined)).toBe(false);
  });

  it('returns true only when end is strictly after start', () => {
    expect(
      isValidEventWindow('2026-07-22T00:00:00.000Z', '2026-07-23T00:00:00.000Z'),
    ).toBe(true);
  });
});

describe('projectGraphPoints — reversed/invalid window (Job 912 repro)', () => {
  const view = {
    startUtc: '2026-07-23T00:00:00.000Z',
    endUtc: '2026-07-22T00:00:00.000Z',
  };
  const series: GraphSeries = {
    playerId: 'p1',
    playerName: 'p1',
    colorIndex: 0,
    points: [
      { tUtc: '2026-07-22T12:00:00.000Z', value: 0 },
      { tUtc: '2026-07-22T18:00:00.000Z', value: 100 },
    ],
  };

  it('returns empty string when endUtc is before startUtc (no off-canvas polyline)', () => {
    expect(projectGraphPoints(view, series, DIMS)).toBe('');
  });

  it('renders zero series for the component when the event window is reversed', () => {
    const out = projectGraphPoints(view, series, DIMS);
    expect(parsePoints(out)).toEqual([]);
  });
});

describe('projectGraphPoints — happy path', () => {
  const view = {
    startUtc: '2025-01-01T00:00:00.000Z',
    endUtc: '2025-01-02T00:00:00.000Z',
  };
  const series: GraphSeries = {
    playerId: 'p1',
    playerName: 'p1',
    colorIndex: 0,
    points: [
      { tUtc: '2025-01-01T00:00:00.000Z', value: 0 },
      { tUtc: '2025-01-01T12:00:00.000Z', value: 50 },
      { tUtc: '2025-01-02T00:00:00.000Z', value: 100 },
    ],
  };

  it('anchors the first point at padL and keeps every X inside the plot area', () => {
    const out = projectGraphPoints(view, series, DIMS);
    const pts = parsePoints(out);
    expect(pts.length).toBe(3);
    pts.forEach((p) => {
      expect(Number.isFinite(p.x)).toBe(true);
      expect(p.x).toBeGreaterThanOrEqual(xMin);
      expect(p.x).toBeLessThanOrEqual(xMax);
      expect(p.y).toBeGreaterThanOrEqual(yMin);
      expect(p.y).toBeLessThanOrEqual(yMax);
    });
    expect(pts[0].x).toBeCloseTo(xMin, 2);
    expect(pts[pts.length - 1].x).toBeLessThanOrEqual(xMax + 1e-6);
  });

  it('does not regress to the previous off-canvas X values', () => {
    const out = projectGraphPoints(view, series, DIMS);
    expect(out).not.toMatch(/16965896296/);
    expect(out).not.toMatch(/-64281599960/);
    expect(out).not.toMatch(/NaN/);
    expect(out).not.toMatch(/Infinity/);
  });
});

describe('projectGraphPoints — zero-span and invalid timestamps', () => {
  it('returns empty string when startUtc equals endUtc', () => {
    const view = {
      startUtc: '2025-01-01T00:00:00.000Z',
      endUtc: '2025-01-01T00:00:00.000Z',
    };
    const series: GraphSeries = {
      playerId: 'p1',
      playerName: 'p1',
      colorIndex: 0,
      points: [{ tUtc: '2025-01-01T00:00:00.000Z', value: 10 }],
    };
    expect(projectGraphPoints(view, series, DIMS)).toBe('');
  });

  it('produces only finite, in-bounds coordinates when a point timestamp is invalid', () => {
    const view = {
      startUtc: '2025-01-01T00:00:00.000Z',
      endUtc: '2025-01-02T00:00:00.000Z',
    };
    const series: GraphSeries = {
      playerId: 'p1',
      playerName: 'p1',
      colorIndex: 0,
      points: [
        { tUtc: 'not-a-date', value: 50 },
        { tUtc: '2025-01-01T12:00:00.000Z', value: 100 },
      ],
    };
    const out = projectGraphPoints(view, series, DIMS);
    const pts = parsePoints(out);
    expect(pts.length).toBe(2);
    pts.forEach((p) => {
      expect(Number.isFinite(p.x)).toBe(true);
      expect(Number.isFinite(p.y)).toBe(true);
      expect(p.x).toBeGreaterThanOrEqual(xMin);
      expect(p.x).toBeLessThanOrEqual(xMax);
      expect(p.y).toBeGreaterThanOrEqual(yMin);
      expect(p.y).toBeLessThanOrEqual(yMax);
    });
  });
});