import { describe, expect, it } from 'vitest';
import { MAP_FORMAT_VERSION, type MindMap } from '@/types/map';
import { MapFormatError, normalizeMapDocument, serializeMap } from '@/services/mapSerialization';

/** Document v4 minimal : deux branches opposees et une relation entre feuilles. */
function documentV4(): Record<string, unknown> {
  return {
    version: 4,
    id: 'map-1',
    name: 'Infrastructure',
    createdAt: '2026-01-01T00:00:00.000Z',
    updatedAt: '2026-01-02T00:00:00.000Z',
    nodes: [
      { id: 'root', type: 'root', text: 'Infrastructure', position: { x: 0, y: 0 }, parentId: null },
      {
        id: 'reseau',
        type: 'standard',
        text: 'Reseau',
        position: { x: 240, y: 0 },
        parentId: 'root',
        order: 0,
        side: 'right',
      },
      {
        id: 'firewall',
        type: 'standard',
        text: 'Firewall',
        position: { x: 480, y: 0 },
        parentId: 'reseau',
        order: 0,
      },
      {
        id: 'services',
        type: 'standard',
        text: 'Services',
        position: { x: -240, y: 0 },
        parentId: 'root',
        order: 1,
        side: 'left',
      },
      {
        id: 'web',
        type: 'standard',
        text: 'Web',
        position: { x: -480, y: 0 },
        parentId: 'services',
        order: 0,
      },
    ],
    edges: [],
    relations: [
      {
        id: 'r-1',
        sourceId: 'firewall',
        targetId: 'web',
        label: 'protege',
        style: 'bezier',
        color: '#a855f7',
        width: 2,
        dashed: true,
        markerEnd: 'arrow',
      },
    ],
    viewport: { x: 0, y: 0, zoom: 1 },
    settings: { theme: 'default', layout: 'mindmap-both', branchStyle: 'bezier', showGrid: true },
  };
}

describe('lecture d un document v4', () => {
  it('conserve les cotes et les relations', () => {
    const map = normalizeMapDocument(documentV4(), { source: 'file' });
    expect(map.version).toBe(MAP_FORMAT_VERSION);

    const sides = new Map(map.nodes.map((node) => [node.id, node.side]));
    expect(sides.get('reseau')).toBe('right');
    expect(sides.get('services')).toBe('left');

    expect(map.relations).toHaveLength(1);
    expect(map.relations[0]?.label).toBe('protege');
    expect(map.relations[0]?.dashed).toBe(true);
    expect(map.relations[0]?.markerEnd).toBe('arrow');
    expect(map.settings.layout).toBe('mindmap-both');
  });

  it('ne modifie pas le document fourni', () => {
    const raw = documentV4();
    const before = JSON.stringify(raw);
    normalizeMapDocument(raw, { source: 'file' });
    expect(JSON.stringify(raw)).toBe(before);
  });

  it('est idempotent : renormaliser ne change plus rien', () => {
    const once = normalizeMapDocument(documentV4(), { source: 'file' });
    const twice = normalizeMapDocument(JSON.parse(JSON.stringify(once)), { source: 'file' });
    expect(twice.nodes).toEqual(once.nodes);
    expect(twice.relations).toEqual(once.relations);
  });

  it('survit a un aller-retour complet', () => {
    const map = normalizeMapDocument(documentV4(), { source: 'file' });
    const again = normalizeMapDocument(JSON.parse(serializeMap(map)), { source: 'file' });
    expect(again.relations).toEqual(map.relations);
    expect(again.nodes.map((node) => [node.id, node.side])).toEqual(
      map.nodes.map((node) => [node.id, node.side]),
    );
  });
});

describe('relations incoherentes', () => {
  it('retire une relation dont la source n existe pas', () => {
    const raw = documentV4();
    (raw.relations as Array<Record<string, unknown>>)[0]!.sourceId = 'fantome';
    expect(normalizeMapDocument(raw, { source: 'file' }).relations).toHaveLength(0);
  });

  it('retire une relation dont la cible n existe pas', () => {
    const raw = documentV4();
    (raw.relations as Array<Record<string, unknown>>)[0]!.targetId = 'fantome';
    expect(normalizeMapDocument(raw, { source: 'file' }).relations).toHaveLength(0);
  });

  it('retire une relation bouclant sur elle-meme', () => {
    const raw = documentV4();
    (raw.relations as Array<Record<string, unknown>>)[0]!.targetId = 'firewall';
    expect(normalizeMapDocument(raw, { source: 'file' }).relations).toHaveLength(0);
  });

  it('ne garde qu une relation par couple source / cible', () => {
    const raw = documentV4();
    const relations = raw.relations as Array<Record<string, unknown>>;
    relations.push({ ...relations[0], id: 'r-2' });
    expect(normalizeMapDocument(raw, { source: 'file' }).relations).toHaveLength(1);
  });

  it('ignore les champs de style invalides sans perdre la relation', () => {
    const raw = documentV4();
    const relation = (raw.relations as Array<Record<string, unknown>>)[0] as Record<string, unknown>;
    relation.style = 'zigzag';
    relation.color = 'javascript:alert(1)';
    relation.markerEnd = 'etoile';

    const parsed = normalizeMapDocument(raw, { source: 'file' }).relations[0];
    expect(parsed?.style).toBeUndefined();
    expect(parsed?.color).toBeUndefined();
    expect(parsed?.markerEnd).toBeUndefined();
    expect(parsed?.label).toBe('protege');
  });

  it('ignore un cote invalide', () => {
    const raw = documentV4();
    (raw.nodes as Array<Record<string, unknown>>)[1]!.side = 'haut';
    const map = normalizeMapDocument(raw, { source: 'file' });
    expect(map.nodes.find((node) => node.id === 'reseau')?.side).toBeUndefined();
  });

  it('refuse un document depassant la limite de relations', () => {
    const raw = documentV4();
    raw.relations = Array.from({ length: 30 }, (_item, index) => ({
      id: `r-${index}`,
      sourceId: 'firewall',
      targetId: 'web',
    }));
    expect(() => normalizeMapDocument(raw, { source: 'file', maxNodes: 10 })).toThrow(
      MapFormatError,
    );
  });
});

describe('migrations vers la v4', () => {
  function legacyDocument(version: number): Record<string, unknown> {
    return {
      version,
      id: `map-v${version}`,
      name: `Carte v${version}`,
      createdAt: '2025-01-01T00:00:00.000Z',
      updatedAt: '2025-01-01T00:00:00.000Z',
      nodes: [
        {
          id: 'root',
          type: 'root',
          text: 'Racine',
          position: { x: 0, y: 0 },
          parentId: null,
          style: version === 1 ? { width: 220, backgroundColor: '#ffffff' } : undefined,
        },
        {
          id: 'a',
          type: 'standard',
          text: 'A',
          position: { x: 200, y: 0 },
          parentId: 'root',
        },
        {
          id: 'b',
          type: 'standard',
          text: 'B',
          position: { x: 200, y: 80 },
          parentId: 'root',
        },
      ],
      edges: [
        { id: 'e-root-a', source: 'root', target: 'a' },
        { id: 'e-root-b', source: 'root', target: 'b' },
      ],
      viewport: { x: 0, y: 0, zoom: 1 },
      settings: { theme: 'default', layout: 'mindmap-right', branchStyle: 'bezier' },
    };
  }

  it('ouvre une carte v1 et la ramene au format courant', () => {
    const map = normalizeMapDocument(legacyDocument(1), { source: 'file' });
    expect(map.version).toBe(4);
    expect(map.relations).toEqual([]);
    // La largeur fixe de la v1 a rejoint layout.width.
    const root = map.nodes.find((node) => node.id === 'root');
    expect(root?.layout?.width).toBe(220);
    expect(root?.layout?.widthMode).toBe('fixed');
    expect(root?.style?.backgroundColor).toBe('#ffffff');
  });

  it('ouvre une carte v2 en materialisant l ordre puis la v4', () => {
    const map = normalizeMapDocument(legacyDocument(2), { source: 'file' });
    expect(map.version).toBe(4);
    expect(map.nodes.find((node) => node.id === 'a')?.order).toBe(0);
    expect(map.nodes.find((node) => node.id === 'b')?.order).toBe(1);
    expect(map.relations).toEqual([]);
  });

  it('ouvre une carte v3 sans rien inventer', () => {
    const map = normalizeMapDocument(legacyDocument(3), { source: 'file' });
    expect(map.version).toBe(4);
    expect(map.relations).toEqual([]);
    // Aucun cote : la carte reste exactement telle qu'elle etait.
    for (const node of map.nodes) expect(node.side).toBeUndefined();
  });

  it('accepte une carte historique lue depuis IndexedDB', () => {
    const stored = legacyDocument(2) as unknown as MindMap;
    const map = normalizeMapDocument(stored, { source: 'storage', allowEmpty: true });
    expect(map.version).toBe(4);
    expect(map.nodes).toHaveLength(3);
    expect(map.relations).toEqual([]);
  });

  it('refuse un document plus recent que le format connu', () => {
    const raw = { ...documentV4(), version: 99 };
    expect(() => normalizeMapDocument(raw, { source: 'file' })).toThrow(MapFormatError);
  });

  it('accepte une carte v4 sans champ relations', () => {
    const raw = documentV4();
    delete raw.relations;
    expect(normalizeMapDocument(raw, { source: 'file' }).relations).toEqual([]);
  });
});