import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import Database from 'better-sqlite3';
import { runMigrations } from '../../src/main/db/migrations/index.js';
import { NoteRepository } from '../../src/main/repository/NoteRepository.js';

describe('NoteRepository — note_revisions', () => {
  let db: Database.Database;
  let repo: NoteRepository;

  beforeEach(() => {
    db = new Database(':memory:');
    db.pragma('foreign_keys = ON');
    runMigrations(db);
    repo = new NoteRepository(db);
  });

  afterEach(() => { db.close(); });

  describe('updateRawText', () => {
    it('notes.raw_text 갱신 + 새 user revision INSERT (single transaction)', () => {
      const v1At = new Date('2026-05-09T00:00:00Z');
      const { id } = repo.create({ rawText: 'v1' }, v1At);
      const t = new Date('2026-05-10T00:00:00Z');
      repo.updateRawText(id, 'v2', t);

      const note = db.prepare(`SELECT raw_text, updated_at FROM notes WHERE id=?`).get(id) as {
        raw_text: string;
        updated_at: string;
      };
      expect(note.raw_text).toBe('v2');
      expect(note.updated_at).toBe('2026-05-10T00:00:00.000Z');

      const revs = db
        .prepare(`SELECT raw_text, edited_by, edited_at FROM note_revisions WHERE note_id=? ORDER BY rev_id ASC`)
        .all(id) as Array<{ raw_text: string; edited_by: string; edited_at: string }>;
      expect(revs).toHaveLength(2); // capture + user
      expect(revs.at(0)!.edited_by).toBe('capture');
      expect(revs.at(0)!.raw_text).toBe('v1');
      expect(revs.at(1)!.edited_by).toBe('user');
      expect(revs.at(1)!.raw_text).toBe('v2');
      expect(revs.at(1)!.edited_at).toBe('2026-05-10T00:00:00.000Z');
    });

    it('atomic: 두 번 호출 시 두 revision 모두 누적 (chain history)', () => {
      const v1At = new Date('2026-05-09T00:00:00Z');
      const { id } = repo.create({ rawText: 'v1' }, v1At);
      repo.updateRawText(id, 'v2', new Date('2026-05-10T00:00:00Z'));
      repo.updateRawText(id, 'v3', new Date('2026-05-11T00:00:00Z'));
      const revs = db
        .prepare(`SELECT raw_text FROM note_revisions WHERE note_id=? ORDER BY rev_id ASC`)
        .all(id) as Array<{ raw_text: string }>;
      expect(revs.map((r) => r.raw_text)).toEqual(['v1', 'v2', 'v3']);
    });
  });

  describe('listRevisions', () => {
    it('DESC 순서 + edited_by + camelCase hydrate', () => {
      const v1At = new Date('2026-05-09T00:00:00Z');
      const { id } = repo.create({ rawText: 'v1' }, v1At);
      repo.updateRawText(id, 'v2', new Date('2026-05-10T00:00:00Z'));
      repo.updateRawText(id, 'v3', new Date('2026-05-11T00:00:00Z'));

      const revs = repo.listRevisions(id);
      expect(revs).toHaveLength(3);
      expect(revs.at(0)!.rawText).toBe('v3');
      expect(revs.at(0)!.editedBy).toBe('user');
      expect(revs.at(1)!.rawText).toBe('v2');
      expect(revs.at(1)!.editedBy).toBe('user');
      expect(revs.at(2)!.rawText).toBe('v1');
      expect(revs.at(2)!.editedBy).toBe('capture');
      expect(typeof revs.at(0)!.revId).toBe('number');
      expect(revs.at(0)!.noteId).toBe(id);
      expect(revs.at(0)!.editedAt).toBe('2026-05-11T00:00:00.000Z');
    });
  });

  describe('restoreRevision', () => {
    it('옛 raw_text 를 새 user revision 으로 INSERT + notes.raw_text 갱신', () => {
      const v1At = new Date('2026-05-09T00:00:00Z');
      const { id } = repo.create({ rawText: 'v1' }, v1At);
      repo.updateRawText(id, 'v2', new Date('2026-05-10T00:00:00Z'));
      repo.updateRawText(id, 'v3', new Date('2026-05-11T00:00:00Z'));

      const revs = repo.listRevisions(id);
      const v1 = revs.find((r) => r.rawText === 'v1');
      expect(v1).toBeDefined();

      repo.restoreRevision(id, v1!.revId, new Date('2026-05-12T00:00:00Z'));

      const note = db.prepare(`SELECT raw_text FROM notes WHERE id=?`).get(id) as { raw_text: string };
      expect(note.raw_text).toBe('v1');

      const after = repo.listRevisions(id);
      expect(after).toHaveLength(4); // v1(capture) + v2 + v3 + v1 restored (user)
      expect(after.at(0)!.rawText).toBe('v1');
      expect(after.at(0)!.editedBy).toBe('user');
      expect(after.at(0)!.editedAt).toBe('2026-05-12T00:00:00.000Z');
    });

    it('존재하지 않는 revId 는 throw', () => {
      const { id } = repo.create({ rawText: 'v1' });
      expect(() => repo.restoreRevision(id, 999_999, new Date())).toThrow(/not found/);
    });
  });

  describe('AiWorker source 회귀', () => {
    it('updateRawText 후 findById 가 latest raw_text 반환 (옛 revision 미노출)', () => {
      const v1At = new Date('2026-05-09T00:00:00Z');
      const { id } = repo.create({ rawText: 'v1' }, v1At);
      repo.updateRawText(id, 'v2 corrected', new Date('2026-05-10T00:00:00Z'));
      const note = repo.findById(id);
      expect(note?.rawText).toBe('v2 corrected');
    });
  });

  describe('importNote — capture revision 생성 (final review 보강)', () => {
    it('insert path: imported note 가 capture revision (createdAt = edited_at) 을 함께 갖는다', () => {
      const r = repo.importNote({
        id: '00000000-0000-0000-0000-000000000001',
        rawText: 'imported text',
        createdAt: '2026-04-01T00:00:00Z',
        updatedAt: '2026-04-02T00:00:00Z',
        aiTitle: 't',
        aiSummary: 's',
        titleEditedByUser: false,
        summaryEditedByUser: false,
        aiProvider: 'p',
        aiGeneratedAt: '2026-04-02T00:00:00Z',
        userIntent: null,
        intentPromptedAt: null,
        tags: []
      });
      expect(r.status).toBe('inserted');

      const revs = repo.listRevisions(r.id);
      expect(revs).toHaveLength(1);
      expect(revs[0]!.rawText).toBe('imported text');
      expect(revs[0]!.editedBy).toBe('capture');
      expect(revs[0]!.editedAt).toBe('2026-04-01T00:00:00Z');
    });

    it('fork path: id 충돌 시 fresh uuidv7 + 새 capture revision (옛 노트 revision 보존)', () => {
      // 기존 노트 (capture 'v1' revision 자동 생성됨)
      const existing = repo.create({ rawText: 'v1' });
      // 동일 id 로 다른 raw_text 를 import → fork
      const r = repo.importNote({
        id: existing.id,
        rawText: 'imported v2',
        createdAt: '2026-04-01T00:00:00Z',
        updatedAt: '2026-04-02T00:00:00Z',
        aiTitle: null,
        aiSummary: null,
        titleEditedByUser: false,
        summaryEditedByUser: false,
        aiProvider: null,
        aiGeneratedAt: null,
        userIntent: null,
        intentPromptedAt: null,
        tags: []
      });
      expect(r.status).toBe('forked');
      expect(r.id).not.toBe(existing.id);

      // forked 노트에 capture revision
      const forkRevs = repo.listRevisions(r.id);
      expect(forkRevs).toHaveLength(1);
      expect(forkRevs[0]!.rawText).toBe('imported v2');
      expect(forkRevs[0]!.editedBy).toBe('capture');

      // 기존 노트의 revision 은 그대로 보존
      const existingRevs = repo.listRevisions(existing.id);
      expect(existingRevs).toHaveLength(1);
      expect(existingRevs[0]!.rawText).toBe('v1');
    });
  });
});