import { describe, expect, it } from 'vitest';
import {
  OutlineError,
  looksIndented,
  parseOutline,
  toFlatLines,
} from '@/services/outlineParser';

describe('lecture d une liste simple', () => {
  it('produit un noeud par ligne', () => {
    const result = parseOutline('VLAN\nVPN\nFirewall');

    expect(result.count).toBe(3);
    expect(result.depth).toBe(1);
    expect(result.roots.map((node) => node.text)).toEqual(['VLAN', 'VPN', 'Firewall']);
    expect(result.roots.every((node) => node.children.length === 0)).toBe(true);
  });

  it('ignore les lignes vides et les espaces superflus', () => {
    const result = parseOutline('VLAN\n\n   \nVPN\n\n');
    expect(result.roots.map((node) => node.text)).toEqual(['VLAN', 'VPN']);
  });

  it('retire les puces et les numerotations', () => {
    const result = parseOutline('- VLAN\n* VPN\n1. Firewall\n2) Switch');
    expect(result.roots.map((node) => node.text)).toEqual(['VLAN', 'VPN', 'Firewall', 'Switch']);
  });

  it('refuse un texte sans ligne exploitable', () => {
    expect(() => parseOutline('   \n\n')).toThrow(OutlineError);
  });

  it('applique la limite de noeuds', () => {
    const texte = Array.from({ length: 12 }, (_unused, index) => `N${index}`).join('\n');
    expect(() => parseOutline(texte, 5)).toThrow(/limite/i);
  });
});

describe('lecture d une arborescence indentee', () => {
  const OUTLINE = [
    'Infrastructure',
    '  Reseau',
    '    VLAN',
    '    VPN',
    '    Firewall',
    '  Virtualisation',
    '    Proxmox',
    '    Docker',
    '  Services',
    '    GLPI',
    '    Grafana',
  ].join('\n');

  it('reconstruit la hierarchie complete', () => {
    const result = parseOutline(OUTLINE);

    expect(result.count).toBe(11);
    expect(result.depth).toBe(3);
    expect(result.roots).toHaveLength(1);

    const racine = result.roots[0];
    expect(racine?.text).toBe('Infrastructure');
    expect(racine?.children.map((node) => node.text)).toEqual([
      'Reseau',
      'Virtualisation',
      'Services',
    ]);
    expect(racine?.children[0]?.children.map((node) => node.text)).toEqual([
      'VLAN',
      'VPN',
      'Firewall',
    ]);
    expect(racine?.children[2]?.children).toHaveLength(2);
  });

  it('accepte les tabulations', () => {
    const result = parseOutline('Reseau\n\tVLAN\n\tVPN\n\t\tSite A');

    expect(result.roots[0]?.children.map((node) => node.text)).toEqual(['VLAN', 'VPN']);
    expect(result.roots[0]?.children[1]?.children[0]?.text).toBe('Site A');
  });

  it('accepte plusieurs racines', () => {
    const result = parseOutline('Reseau\n  VLAN\nServices\n  GLPI');
    expect(result.roots.map((node) => node.text)).toEqual(['Reseau', 'Services']);
  });

  it('tolere un texte entierement indente', () => {
    const result = parseOutline('    Reseau\n      VLAN');
    expect(result.roots[0]?.text).toBe('Reseau');
    expect(result.roots[0]?.children[0]?.text).toBe('VLAN');
  });

  it('refuse une indentation incoherente', () => {
    // "C" ne correspond a aucun niveau ouvert : ni 0, ni 4.
    expect(() => parseOutline('A\n    B\n  C')).toThrow(/incoherente/i);
  });

  it('refuse une ligne moins indentee que la premiere', () => {
    expect(() => parseOutline('  A\nB')).toThrow(/moins indentee/i);
  });

  it('refuse une arborescence trop profonde', () => {
    const profond = Array.from({ length: 25 }, (_unused, index) =>
      `${' '.repeat(index * 2)}N${index}`,
    ).join('\n');
    expect(() => parseOutline(profond)).toThrow(/profonde/i);
  });

  it('signale la ligne fautive', () => {
    try {
      parseOutline('A\n    B\n  C');
      expect.unreachable('une erreur etait attendue');
    } catch (error) {
      expect(error).toBeInstanceOf(OutlineError);
      expect((error as OutlineError).line).toBe(3);
    }
  });
});

describe('detection du mode', () => {
  it('reconnait un texte indente', () => {
    expect(looksIndented('A\n  B')).toBe(true);
    expect(looksIndented('A\n\tB')).toBe(true);
    expect(looksIndented('A\nB')).toBe(false);
  });

  it('extrait les lignes utiles', () => {
    expect(toFlatLines('- A\n\n  \n2. B\r\nC')).toEqual(['A', 'B', 'C']);
  });
});