import { render, screen } from '@testing-library/react';
import { PlaceView } from '@/components/places/PlaceView';
import type { PlaceDetail } from '@/lib/places';

const detail: PlaceDetail = {
  place: { kind: 'town', slug: 'brentwood', name: 'Brentwood', count: 29,
           parent_authority: 'Essex', phases: ['primary'] },
  schools: [
    { urn: 1, school_name: 'Alpha Primary', rwm_expected_pct: 82,
      ofsted_grade: 1, phase: 'Primary' } as never,
    { urn: 2, school_name: 'Beta Primary', rwm_expected_pct: 44,
      ofsted_grade: 3, phase: 'Primary' } as never,
  ],
  averages: { rwm_expected_pct: 63, attainment_8_score: null },
};

describe('PlaceView', () => {
  it('leads with an H1 that matches how the place is searched', () => {
    render(<PlaceView detail={detail} phase="primary" englandAverage={61}
      neighbours={[]} />);
    expect(screen.getByRole('heading', { level: 1 }))
      .toHaveTextContent(/primary schools in brentwood/i);
  });

  it('states the count so the page says something before the table', () => {
    render(<PlaceView detail={detail} phase="primary" englandAverage={61}
      neighbours={[]} />);
    expect(screen.getByText(/29 schools/i)).toBeInTheDocument();
  });

  it('compares the local average against England, which a list cannot', () => {
    render(<PlaceView detail={detail} phase="primary" englandAverage={61}
      neighbours={[]} />);
    expect(screen.getByTestId('local-vs-england')).toHaveTextContent('63');
    expect(screen.getByTestId('local-vs-england')).toHaveTextContent('61');
  });

  it('links every school in scope, which is what de-orphans them', () => {
    render(<PlaceView detail={detail} phase="primary" englandAverage={61}
      neighbours={[]} />);
    expect(screen.getAllByRole('link', { name: /Primary$/ })).toHaveLength(2);
  });

  it('links to the parent authority so the place sits in a hierarchy', () => {
    render(<PlaceView detail={detail} phase="primary" englandAverage={61}
      neighbours={[]} />);
    expect(screen.getByRole('link', { name: /Essex/i }))
      .toHaveAttribute('href', '/schools/authority/essex');
  });

  it('shows the Ofsted distribution, not just a count of Outstanding', () => {
    render(<PlaceView detail={detail} phase="primary" englandAverage={61}
      neighbours={[]} />);
    expect(screen.getByTestId('ofsted-distribution')).toBeInTheDocument();
  });

  it('links to neighbouring places so the page is not a dead end', () => {
    render(<PlaceView detail={detail} phase="primary" englandAverage={61}
      neighbours={[{ kind: 'town', slug: 'romford', name: 'Romford', count: 40 }]} />);
    expect(screen.getByRole('link', { name: /Romford/ }))
      .toHaveAttribute('href', '/schools/romford');
  });

  it('says nothing about an average it does not have', () => {
    render(<PlaceView detail={{ ...detail, averages:
      { rwm_expected_pct: null, attainment_8_score: null } }}
      phase="primary" englandAverage={61} neighbours={[]} />);
    expect(screen.queryByTestId('local-vs-england')).not.toBeInTheDocument();
  });
});

describe('PlaceView structured data', () => {
  function jsonLd() {
    const { container } = render(<PlaceView detail={detail} phase="primary"
      englandAverage={61} neighbours={[]} />);
    const el = container.querySelector('script[type="application/ld+json"]');
    return JSON.parse(el!.textContent!);
  }

  it('declares the page as a ranked list, not prose', () => {
    const types = jsonLd()['@graph'].map((n: { '@type': string }) => n['@type']);
    expect(types).toContain('ItemList');
    expect(types).toContain('BreadcrumbList');
  });

  it('gives every listed school an absolute URL on the canonical host', () => {
    const list = jsonLd()['@graph'].find((n: { '@type': string }) => n['@type'] === 'ItemList');
    expect(list.itemListElement).toHaveLength(2);
    for (const item of list.itemListElement) {
      expect(item.url).toMatch(/^https:\/\/www\.schoolcompare\.co\.uk\/school\//);
    }
  });
});

describe('PlaceView phase variants', () => {
  it('links the phase variants that exist', () => {
    render(<PlaceView detail={detail} englandAverage={61} neighbours={[]} />);
    expect(screen.getByRole('link', { name: /Primary schools in Brentwood/i }))
      .toHaveAttribute('href', '/schools/brentwood/primary');
  });

  it('links no variant for a phase below its own threshold', () => {
    render(<PlaceView detail={detail} englandAverage={61} neighbours={[]} />);
    expect(screen.queryByRole('link', { name: /Secondary schools in Brentwood/i }))
      .not.toBeInTheDocument();
  });

  it('does not link sideways from a variant page to itself', () => {
    render(<PlaceView detail={detail} phase="primary" englandAverage={61}
      neighbours={[]} />);
    expect(screen.queryByRole('link', { name: /Primary schools in Brentwood/i }))
      .not.toBeInTheDocument();
  });
});

describe('PlaceView presentation', () => {
  // /schools/brentwood shipped with 8 of 27 rows blank: an unphased page shows
  // one primary-only measure for a list that also holds secondaries.
  const mixed: PlaceDetail = {
    place: { kind: 'town', slug: 'brentwood', name: 'Brentwood', count: 4,
             parent_authority: 'Essex', phases: ['primary', 'secondary'] },
    schools: [
      { urn: 1, school_name: 'Alpha Primary', phase: 'Primary',
        rwm_expected_pct: 82, attainment_8_score: null } as never,
      { urn: 2, school_name: 'Beta High', phase: 'Secondary',
        rwm_expected_pct: null, attainment_8_score: 47 } as never,
    ],
    averages: { rwm_expected_pct: 63, attainment_8_score: 45 },
  };

  it('gives each phase its own table rather than one column of blanks', () => {
    render(<PlaceView detail={mixed} englandAverage={61} neighbours={[]} />);
    expect(screen.getByRole('heading', { name: /^Primary schools/ })).toBeInTheDocument();
    expect(screen.getByRole('heading', { name: /^Secondary schools/ })).toBeInTheDocument();
    expect(screen.getByText('82%')).toBeInTheDocument();
    expect(screen.getByText('47')).toBeInTheDocument();
  });

  it('names the measure in plain words, not jargon', () => {
    // The first cut said "RWM expected", which appears nowhere else on the site.
    render(<PlaceView detail={mixed} englandAverage={61} neighbours={[]} />);
    expect(screen.getByText('Reading, writing & maths')).toBeInTheDocument();
    expect(screen.getByText('Attainment 8')).toBeInTheDocument();
    expect(screen.queryByText(/RWM expected/i)).not.toBeInTheDocument();
  });

  it('says a missing result is unpublished rather than showing a bare dash', () => {
    const noResult: PlaceDetail = {
      ...mixed,
      schools: [{ urn: 3, school_name: 'New Primary', phase: 'Primary',
                  rwm_expected_pct: null, attainment_8_score: null } as never],
    };
    render(<PlaceView detail={noResult} englandAverage={61} neighbours={[]} />);
    expect(screen.getByText('Not published')).toBeInTheDocument();
  });

  it('styles school links to the site convention rather than browser default', () => {
    const { container } = render(<PlaceView detail={mixed} englandAverage={61}
      neighbours={[]} />);
    const link = container.querySelector('a[href^="/school/"]');
    expect(link?.className).toBeTruthy();
  });

  it('a phased page shows one table and no phase headings', () => {
    render(<PlaceView detail={mixed} phase="primary" englandAverage={61}
      neighbours={[]} />);
    expect(screen.queryByRole('heading', { name: /^Secondary schools/ }))
      .not.toBeInTheDocument();
  });
});

describe('PlaceView table alignment', () => {
  const aligned: PlaceDetail = {
    place: { kind: 'town', slug: 'brentwood', name: 'Brentwood', count: 2,
             parent_authority: 'Essex', phases: ['primary'] },
    schools: [
      { urn: 1, school_name: 'Alpha Primary', phase: 'Primary',
        rwm_expected_pct: 82, attainment_8_score: null } as never,
    ],
    averages: { rwm_expected_pct: 63, attainment_8_score: null },
  };

  it('aligns the measure heading and its values with the same class', () => {
    // They were aligned by two different selectors whose specificity did not
    // match: `.table th:last-child` (0,2,1) won and went right, while `.num`
    // (0,1,0) lost to `.table td` (0,1,1) and stayed left. Sharing one class
    // is what makes them impossible to drift apart.
    const { container } = render(<PlaceView detail={aligned} englandAverage={61}
      neighbours={[]} />);
    const th = container.querySelectorAll('th')[1];
    const td = container.querySelectorAll('tbody td')[1];
    expect(th.className).toBeTruthy();
    expect(td.className).toBe(th.className);
  });

  it('leaves the school-name column unclassed so it takes the spare width', () => {
    const { container } = render(<PlaceView detail={aligned} englandAverage={61}
      neighbours={[]} />);
    expect(container.querySelectorAll('th')[0].className).toBe('');
  });
});

describe('PlaceView authorities', () => {
  const straddling: PlaceDetail = {
    place: { kind: 'outcode', slug: 'sw19', name: 'SW19', count: 33,
             parent_authority: 'Merton', phases: ['primary'],
             authorities: [
               { name: 'Merton', slug: 'merton', count: 26 },
               { name: 'Wandsworth', slug: 'wandsworth', count: 7 },
             ] },
    schools: [
      { urn: 1, school_name: 'Alpha Primary', phase: 'Primary',
        rwm_expected_pct: 82, attainment_8_score: null } as never,
    ],
    averages: { rwm_expected_pct: 63, attainment_8_score: null },
  };

  it('names every authority the place straddles, not just the largest', () => {
    // SW19 is mostly Merton but partly Wandsworth. Naming one asserts
    // something false about a quarter of outcodes.
    render(<PlaceView detail={straddling} englandAverage={61} neighbours={[]} />);
    expect(screen.getByRole('link', { name: 'Merton' }))
      .toHaveAttribute('href', '/schools/authority/merton');
    expect(screen.getByRole('link', { name: 'Wandsworth' }))
      .toHaveAttribute('href', '/schools/authority/wandsworth');
  });

  it('joins them readably rather than as a bare list', () => {
    // Asserted on the summary line's whole text: a loose /and/ matcher also
    // hits "Wandsworth".
    const { container } = render(<PlaceView detail={straddling}
      englandAverage={61} neighbours={[]} />);
    const summary = container.querySelector('header p');
    expect(summary?.textContent).toContain('Merton and Wandsworth');
  });

  it('falls back to the single parent when the field is absent', () => {
    // A cached API response predating the authorities field must not blank
    // the line entirely.
    const legacy = { ...straddling,
      place: { ...straddling.place, authorities: undefined } };
    render(<PlaceView detail={legacy} englandAverage={61} neighbours={[]} />);
    expect(screen.getByRole('link', { name: 'Merton' })).toBeInTheDocument();
  });
});