import { describe, it, expect } from 'vitest';
import {
  buildPublicationAsciiDoc,
  renderPublication,
  renderPublicationFromEvents,
  renderEvent,
  toPublicationIndexLike,
} from './publication-helper.js';

const index = {
  kind: 30040 as const,
  title: 'My Book',
  d: 'my-book-v1',
  a: ['30041:abc:ch1', '30041:abc:ch2'],
  type: 'book',
};

const sections = [
  { address: '30041:abc:ch1', title: 'Chapter One', content: 'First chapter body.' },
  { address: '30041:abc:ch2', title: 'Chapter Two', content: 'Second chapter body.' },
];

describe('buildPublicationAsciiDoc', () => {
  it('builds combined AsciiDoc from index and sections', () => {
    const adoc = buildPublicationAsciiDoc({ index, sections });
    expect(adoc).toContain('= My Book');
    expect(adoc).toContain('== Chapter One');
    expect(adoc).toContain('First chapter body.');
    expect(adoc).toContain('== Chapter Two');
    expect(adoc).toContain('Second chapter body.');
  });

  it('throws if kind is not 30040', () => {
    expect(() =>
      buildPublicationAsciiDoc({
        index: { ...index, kind: 1 as 30040 },
        sections,
      })
    ).toThrow('Expected kind 30040');
  });
});

describe('renderPublication', () => {
  it('returns asciidoc, html, and tableOfContents', () => {
    const out = renderPublication({ index, sections });
    expect(out.asciidoc).toContain('= My Book');
    expect(out.html).toContain('My Book');
    expect(out.html).toContain('Chapter One');
    expect(out.html).toContain('First chapter body.');
    expect(typeof out.tableOfContents).toBe('string');
  });

  it('can disable toc', () => {
    const out = renderPublication({ index, sections }, { toc: false });
    expect(out.tableOfContents).toBe('');
  });
});

describe('toPublicationIndexLike', () => {
  it('parses event-like payload with kind 30040 and title', () => {
    const payload = {
      kind: 30040,
      tags: [
        ['title', 'Test Pub'],
        ['d', 'test-d'],
        ['a', '30041:pk1:d1'],
        ['a', '30041:pk1:d2'],
        ['type', 'blog'],
        ['image', 'https://example.com/cover.png'],
      ],
    };
    const parsed = toPublicationIndexLike(payload);
    expect(parsed).not.toBeNull();
    expect(parsed!.kind).toBe(30040);
    expect(parsed!.title).toBe('Test Pub');
    expect(parsed!.d).toBe('test-d');
    expect(parsed!.a).toEqual(['30041:pk1:d1', '30041:pk1:d2']);
    expect(parsed!.type).toBe('blog');
    expect(parsed!.image).toBe('https://example.com/cover.png');
  });

  it('returns null for wrong kind', () => {
    expect(toPublicationIndexLike({ kind: 1, tags: [['title', 'X']] })).toBeNull();
  });

  it('returns null when title is missing', () => {
    expect(toPublicationIndexLike({ kind: 30040, tags: [['d', 'x']] })).toBeNull();
  });
});

describe('renderEvent', () => {
  it('accepts event JSON and returns HTML', () => {
    const event = {
      kind: 30041,
      content: '= One section\n\nSome *bold* text.',
      tags: [['title', 'One section']],
      pubkey: 'abc',
    };
    const html = renderEvent(event);
    expect(html).toContain('<h1');
    expect(html).toContain('One section');
    expect(html).toContain('<strong>bold</strong>');
  });

  it('accepts 30818 wiki event', () => {
    const event = { kind: 30818, content: 'Wiki *content*.', tags: [] };
    const html = renderEvent(event);
    expect(html).toContain('Wiki');
    expect(html).toContain('<strong>content</strong>');
  });
});

describe('renderPublicationFromEvents', () => {
  it('accepts index event + section events JSON and returns one HTML page', () => {
    const indexEvent = {
      kind: 30040,
      content: '',
      tags: [
        ['title', 'My Book'],
        ['d', 'my-book'],
        ['a', '30041:pk:ch1'],
        ['a', '30041:pk:ch2'],
      ],
      pubkey: 'pk',
    };
    const sectionEvents = [
      {
        kind: 30041,
        content: 'First chapter body.',
        tags: [['title', 'Chapter One'], ['d', 'ch1']],
        pubkey: 'pk',
      },
      {
        kind: 30041,
        content: 'Second chapter body.',
        tags: [['title', 'Chapter Two'], ['d', 'ch2']],
        pubkey: 'pk',
      },
    ];
    const out = renderPublicationFromEvents(indexEvent, sectionEvents);
    expect(out.html).toContain('My Book');
    expect(out.html).toContain('Chapter One');
    expect(out.html).toContain('First chapter body.');
    expect(out.html).toContain('Chapter Two');
    expect(out.html).toContain('Second chapter body.');
    expect(out.asciidoc).toContain('= My Book');
  });

  it('throws if index event is not kind 30040', () => {
    expect(() =>
      renderPublicationFromEvents(
        { kind: 1, content: '', tags: [['title', 'X']] },
        []
      )
    ).toThrow('Event kind must be 30040');
  });
});