import { describe, it, expect } from 'vitest'
import { D3ROError, ErrorCode } from '@d3ro/core/errors'
import { IPC_CHANNELS } from '@d3ro/core/ipc-channels'
import { getHistoryService } from '../../src/main/services/HistoryService'
import { getMemoService } from '../../src/main/services/MemoService'
import { registerMemoHandlers } from '../../src/main/ipc/memo-handlers'
import { historyInput, invokeIpc, useRedHarness } from './harness'

useRedHarness()

describe('유스케이스: 메모 태그 추가/삭제/검색/내보내기', () => {
  function seedHistory(): string {
    return getHistoryService().create(historyInput()).id
  }

  it('새 히스토리에는 태그가 없다', () => {
    const id = seedHistory()
    expect(getMemoService().getTagsForEntry(id)).toEqual([])
  })

  it('태그를 달면 소문자로 정규화된다', () => {
    const id = seedHistory()
    const tag = getMemoService().addTag(id, '  IDEA  ')
    expect(tag.tag).toBe('idea')
    expect(getMemoService().getTagsForEntry(id)).toHaveLength(1)
  })

  it('같은 태그 중복은 MemoTagDuplicate 다', () => {
    const id = seedHistory()
    getMemoService().addTag(id, 'work')
    expect(() => getMemoService().addTag(id, 'WORK')).toThrow(D3ROError)
    try {
      getMemoService().addTag(id, 'work')
    } catch (err) {
      expect((err as D3ROError).code).toBe(ErrorCode.MemoTagDuplicate)
    }
  })

  it('빈 태그는 거부된다', () => {
    const id = seedHistory()
    expect(() => getMemoService().addTag(id, '   ')).toThrow()
  })

  it('태그 제거 후 목록이 비다', () => {
    const id = seedHistory()
    getMemoService().addTag(id, 'tmp')
    getMemoService().removeTag(id, 'tmp')
    expect(getMemoService().getTagsForEntry(id)).toEqual([])
  })

  it('없는 태그 제거는 MemoTagNotFound 다', () => {
    const id = seedHistory()
    expect(() => getMemoService().removeTag(id, 'ghost')).toThrow(D3ROError)
    try {
      getMemoService().removeTag(id, 'ghost')
    } catch (err) {
      expect((err as D3ROError).code).toBe(ErrorCode.MemoTagNotFound)
    }
  })

  it('전체 태그 카운트가 사용 횟수를 반영한다', () => {
    const a = seedHistory()
    const b = seedHistory()
    getMemoService().addTag(a, 'shared')
    getMemoService().addTag(b, 'shared')
    getMemoService().addTag(a, 'solo')
    const all = getMemoService().getAllTags()
    const shared = all.find((t) => t.tag === 'shared')
    expect(shared?.count).toBe(2)
  })

  it('태그로 히스토리를 검색한다', () => {
    const a = seedHistory()
    seedHistory()
    getMemoService().addTag(a, 'findme')
    const page = getMemoService().searchByTag({ tag: 'findme', page: 0, pageSize: 10 })
    expect(page.total).toBe(1)
    expect(page.entries[0].id).toBe(a)
  })

  it('없는 태그 검색은 0건이다', () => {
    seedHistory()
    expect(getMemoService().searchByTag({ tag: 'none', page: 0, pageSize: 10 }).total).toBe(0)
  })

  it('마크다운 내보내기는 파일을 만들고 내용을 담는다', () => {
    const id = seedHistory()
    getMemoService().addTag(id, 'export')
    const filePath = getMemoService().exportMarkdown({ tag: 'export' })
    expect(filePath.endsWith('.md')).toBe(true)
    const fs = require('fs') as typeof import('fs')
    const body = fs.readFileSync(filePath, 'utf-8')
    expect(body).toContain('#export')
    expect(body.length).toBeGreaterThan(10)
  })

  it('매칭 없는 내보내기도 파일을 만들되 비었음을 표시한다', () => {
    const filePath = getMemoService().exportMarkdown({ tag: 'absent' })
    const fs = require('fs') as typeof import('fs')
    const body = fs.readFileSync(filePath, 'utf-8')
    expect(body).toMatch(/No memo entries found/i)
  })

  it('IPC memo:addTag / getTags 왕복', async () => {
    registerMemoHandlers()
    const id = seedHistory()
    const add = await invokeIpc(IPC_CHANNELS.MEMO.ADD_TAG, { historyId: id, tag: 'ipc' })
    expect(add.success).toBe(true)
    const tags = await invokeIpc(IPC_CHANNELS.MEMO.GET_TAGS, { historyId: id })
    expect(tags.success).toBe(true)
    if (tags.success) expect(tags.data[0].tag).toBe('ipc')
  })

  it('IPC 중복 태그는 MemoTagDuplicate 다', async () => {
    registerMemoHandlers()
    const id = seedHistory()
    await invokeIpc(IPC_CHANNELS.MEMO.ADD_TAG, { historyId: id, tag: 'dup' })
    const res = await invokeIpc(IPC_CHANNELS.MEMO.ADD_TAG, { historyId: id, tag: 'dup' })
    expect(res.success).toBe(false)
    if (!res.success) expect(res.error.code).toBe(ErrorCode.MemoTagDuplicate)
  })

  it('IPC 없는 태그 제거는 MemoTagNotFound 다', async () => {
    registerMemoHandlers()
    const id = seedHistory()
    const res = await invokeIpc(IPC_CHANNELS.MEMO.REMOVE_TAG, { historyId: id, tag: 'nope' })
    expect(res.success).toBe(false)
    if (!res.success) expect(res.error.code).toBe(ErrorCode.MemoTagNotFound)
  })

  it('IPC getAllTags / searchByTag', async () => {
    registerMemoHandlers()
    const id = seedHistory()
    getMemoService().addTag(id, 'listed')
    const all = await invokeIpc(IPC_CHANNELS.MEMO.GET_ALL_TAGS)
    expect(all.success).toBe(true)
    const search = await invokeIpc(IPC_CHANNELS.MEMO.SEARCH_BY_TAG, {
      tag: 'listed',
      page: 0,
      pageSize: 10,
    })
    expect(search.success).toBe(true)
    if (search.success) expect(search.data.total).toBe(1)
  })
})