import { describe, it, expect, afterEach } from 'vitest'
import { DatabaseSync } from 'node:sqlite'
import { migrate } from '../../src/main/db/migrate'
import { VolumeRepository } from '../../src/main/db/repositories/volume.repo'
import { ChapterRepository } from '../../src/main/db/repositories/chapter.repo'
import { ChapterBridgeService } from '../../src/main/services/chapter-bridge.service'
import { AiClientService } from '../../src/main/services/ai-client.service'
import { DEFAULT_AI_CONFIG } from '../../src/shared/types'
import type { SqliteDb } from '../../src/main/db/types'

const AI_TEST_CONFIG = { ...DEFAULT_AI_CONFIG, timeoutMs: 240_000, maxTokens: 4096 }

describe('ChapterBridgeService', () => {
  let db: SqliteDb
  afterEach(() => db?.close())

  it('UT-BRIDGE-01: extracts tail and head', () => {
    db = new DatabaseSync(':memory:')
    migrate(db)
    const volId = new VolumeRepository(db).create('卷一', 0).id
    const chapterRepo = new ChapterRepository(db)
    chapterRepo.create(volId, '上一章', 0, `<p>${'甲'.repeat(400)}</p>`)
    const cur = chapterRepo.create(volId, '本章', 1, '<p>开头内容</p>')
    const service = new ChapterBridgeService(db)
    const result = service.extract(cur.id)
    expect(result.previousTail.length).toBeLessThanOrEqual(300)
    expect(result.previousTail.length).toBeGreaterThan(50)
    expect(result.currentHead).toContain('开头')
  })

  it('IT-BRIDGE-01: getBridge returns aiSuggestion from LM Studio', async () => {
    db = new DatabaseSync(':memory:')
    migrate(db)
    const volId = new VolumeRepository(db).create('卷一', 0).id
    const chapterRepo = new ChapterRepository(db)
    chapterRepo.create(
      volId,
      '上一章',
      0,
      '<p>林远站在演武场中央，众人目光汇聚，他知道从这一刻起一切都将不同。</p>'
    )
    const cur = chapterRepo.create(
      volId,
      '本章',
      1,
      '<p>晨光透过竹帘，林远深吸一口气推开了门。</p>'
    )
    const aiClient = new AiClientService(() => AI_TEST_CONFIG)
    const service = new ChapterBridgeService(db, aiClient)
    const result = await service.getBridge(cur.id, true)
    expect(result.aiSuggestion?.trim().length).toBeGreaterThan(10)
  }, 240_000)
})