import { describe, it, expect } from 'vitest'
import { D3ROError, ErrorCode } from '@d3ro/core/errors'
import { IPC_CHANNELS } from '@d3ro/core/ipc-channels'
import { getDictionaryService } from '../../src/main/services/DictionaryService'
import { registerDictionaryHandlers } from '../../src/main/ipc/dictionary-handlers'
import { invokeIpc, useRedHarness } from './harness'
import { USER_TEXT } from './fixtures'

useRedHarness()

describe('유스케이스: 사용자 사전 CRUD / 검색 / 힌트 / IPC', () => {
  it('빈 사전 목록은 0건이다', () => {
    const page = getDictionaryService().list({ page: 0, pageSize: 20 })
    expect(page.total).toBe(0)
    expect(page.entries).toEqual([])
  })

  it('단어를 추가하면 목록에 나타난다', () => {
    const entry = getDictionaryService().add({ word: 'D3RO' })
    expect(entry.word).toBe('D3RO')
    expect(entry.category).toBe('user')
    expect(entry.usageCount).toBe(0)
    expect(getDictionaryService().list({ page: 0, pageSize: 10 }).total).toBe(1)
  })

  it('발음과 기술 카테고리를 지정해 추가한다', () => {
    const entry = getDictionaryService().add({
      word: 'Whisper',
      pronunciation: '위스퍼',
      category: 'technical',
    })
    expect(entry.pronunciation).toBe('위스퍼')
    expect(entry.category).toBe('technical')
  })

  it('유니코드 단어도 추가된다', () => {
    const entry = getDictionaryService().add({ word: USER_TEXT.UNICODE })
    expect(entry.word).toBe(USER_TEXT.UNICODE)
  })

  it('빈 단어 추가는 거부된다', () => {
    expect(() => getDictionaryService().add({ word: '   ' })).toThrow(D3ROError)
    try {
      getDictionaryService().add({ word: '' })
      expect.unreachable()
    } catch (err) {
      expect(err).toBeInstanceOf(D3ROError)
      expect((err as D3ROError).code).toBe(ErrorCode.DictionaryImportInvalidFormat)
    }
  })

  it('같은 단어+카테고리 중복 추가는 DictionaryDuplicate 이다', () => {
    getDictionaryService().add({ word: USER_TEXT.DUP })
    expect(() => getDictionaryService().add({ word: USER_TEXT.DUP })).toThrow(D3ROError)
    try {
      getDictionaryService().add({ word: USER_TEXT.DUP })
    } catch (err) {
      expect((err as D3ROError).code).toBe(ErrorCode.DictionaryDuplicate)
    }
  })

  it('같은 단어를 다른 카테고리로 추가할 수 있다', () => {
    getDictionaryService().add({ word: 'API', category: 'user' })
    const tech = getDictionaryService().add({ word: 'API', category: 'technical' })
    expect(tech.category).toBe('technical')
    expect(getDictionaryService().list({ page: 0, pageSize: 10 }).total).toBe(2)
  })

  it('단어 수정이 반영된다', () => {
    const created = getDictionaryService().add({ word: 'old' })
    const updated = getDictionaryService().update({ id: created.id, word: 'new' })
    expect(updated?.word).toBe('new')
    expect(getDictionaryService().list({ page: 0, pageSize: 10 }).entries[0].word).toBe('new')
  })

  it('없는 id 수정은 null 이다', () => {
    expect(getDictionaryService().update({ id: 'missing', word: 'x' })).toBeNull()
  })

  it('단어 삭제 후 목록에서 사라진다', () => {
    const created = getDictionaryService().add({ word: 'gone' })
    expect(getDictionaryService().delete(created.id)).toBe(true)
    expect(getDictionaryService().list({ page: 0, pageSize: 10 }).total).toBe(0)
  })

  it('없는 id 삭제는 false 이다', () => {
    expect(getDictionaryService().delete('missing')).toBe(false)
  })

  it('검색은 부분 일치한다', () => {
    getDictionaryService().add({ word: '인공지능' })
    getDictionaryService().add({ word: '자연어' })
    const found = getDictionaryService().search({ query: '인공', page: 0, pageSize: 10 })
    expect(found.total).toBe(1)
    expect(found.entries[0].word).toBe('인공지능')
  })

  it('검색 무결과는 빈 페이지이다', () => {
    getDictionaryService().add({ word: 'foo' })
    expect(getDictionaryService().search({ query: 'zzz', page: 0, pageSize: 10 }).total).toBe(0)
  })

  it('사용 횟수 증가가 저장된다', () => {
    const created = getDictionaryService().add({ word: 'hint' })
    getDictionaryService().incrementUsage(created.id)
    getDictionaryService().incrementUsage(created.id)
    const listed = getDictionaryService().list({ page: 0, pageSize: 10 }).entries[0]
    expect(listed.usageCount).toBe(2)
    expect(listed.lastUsedAt).toBeGreaterThan(0)
  })

  it('getPromptHints 는 사용 빈도 순 단어 목록이다', () => {
    const a = getDictionaryService().add({ word: 'alpha' })
    getDictionaryService().add({ word: 'beta' })
    getDictionaryService().incrementUsage(a.id)
    const hints = getDictionaryService().getPromptHints()
    expect(hints.startsWith('alpha')).toBe(true)
    expect(hints).toContain('beta')
  })

  it('빈 사전의 prompt hint 는 빈 문자열이다', () => {
    expect(getDictionaryService().getPromptHints()).toBe('')
  })

  it('IPC dictionary:add / getAll 왕복', async () => {
    registerDictionaryHandlers()
    const add = await invokeIpc(IPC_CHANNELS.DICTIONARY.ADD, { word: 'IPCWORD' })
    expect(add.success).toBe(true)
    const all = await invokeIpc(IPC_CHANNELS.DICTIONARY.GET_ALL, { page: 0, pageSize: 10 })
    expect(all.success).toBe(true)
    if (all.success) expect(all.data.total).toBe(1)
  })

  it('IPC dictionary:add 빈 단어는 실패한다', async () => {
    registerDictionaryHandlers()
    const res = await invokeIpc(IPC_CHANNELS.DICTIONARY.ADD, { word: '  ' })
    expect(res.success).toBe(false)
  })

  it('IPC dictionary:add 중복은 DictionaryDuplicate 이다', async () => {
    registerDictionaryHandlers()
    await invokeIpc(IPC_CHANNELS.DICTIONARY.ADD, { word: 'dup' })
    const res = await invokeIpc(IPC_CHANNELS.DICTIONARY.ADD, { word: 'dup' })
    expect(res.success).toBe(false)
    if (!res.success) expect(res.error.code).toBe(ErrorCode.DictionaryDuplicate)
  })

  it('IPC dictionary:update 없는 id 는 DictionaryNotFound 이다', async () => {
    registerDictionaryHandlers()
    const res = await invokeIpc(IPC_CHANNELS.DICTIONARY.UPDATE, { id: 'missing', word: 'x' })
    expect(res.success).toBe(false)
    if (!res.success) expect(res.error.code).toBe(ErrorCode.DictionaryNotFound)
  })

  it('IPC dictionary:delete 없는 id 는 DictionaryNotFound 이다', async () => {
    registerDictionaryHandlers()
    const res = await invokeIpc(IPC_CHANNELS.DICTIONARY.DELETE, { id: 'missing' })
    expect(res.success).toBe(false)
    if (!res.success) expect(res.error.code).toBe(ErrorCode.DictionaryNotFound)
  })

  it('IPC dictionary:search 는 서비스 검색을 노출한다', async () => {
    registerDictionaryHandlers()
    getDictionaryService().add({ word: '검색대상' })
    const res = await invokeIpc(IPC_CHANNELS.DICTIONARY.SEARCH, { query: '검색', page: 0, pageSize: 10 })
    expect(res.success).toBe(true)
    if (res.success) expect(res.data.total).toBe(1)
  })
})