import { ipcMain } from 'electron'
import { IPC } from '../../../shared/ipc-channels'
import type { ChapterStatus, PublishStatus } from '../../../shared/types'
import { BookRegistryService } from '../../services/book-registry'
import { ftsSync } from '../../services/fts-sync.service'
import { wrap } from '../result'

export function registerChapterHandlers(registry: BookRegistryService): void {
  ipcMain.handle(
    IPC.VOLUME_CREATE,
    (_event, { bookId, name }: { bookId: string; name: string }) =>
      wrap(() => {
        const repo = registry.getVolumeRepo(bookId)
        const volumes = repo.list()
        return repo.create(name, volumes.length)
      })
  )

  ipcMain.handle(
    IPC.VOLUME_UPDATE,
    (
      _event,
      { bookId, volumeId, name, description }: { bookId: string; volumeId: string; name?: string; description?: string }
    ) => wrap(() => registry.getVolumeRepo(bookId).update(volumeId, { name, description }))
  )

  ipcMain.handle(
    IPC.VOLUME_DELETE,
    (_event, { bookId, volumeId }: { bookId: string; volumeId: string }) =>
      wrap(() => {
        registry.getVolumeRepo(bookId).delete(volumeId)
      })
  )

  ipcMain.handle(
    IPC.CHAPTER_CREATE,
    (
      _event,
      { bookId, volumeId, title }: { bookId: string; volumeId: string; title: string }
    ) =>
      wrap(() => {
        const repo = registry.getChapterRepo(bookId)
        const sortOrder = repo.nextSortOrder(volumeId)
        const chapter = repo.create(volumeId, title, sortOrder)
        ftsSync.upsert(registry.getDb(bookId), 'chapter', chapter.id, chapter.title, chapter.content)
        return chapter
      })
  )

  ipcMain.handle(
    IPC.CHAPTER_GET,
    (_event, { bookId, chapterId }: { bookId: string; chapterId: string }) =>
      wrap(() => {
        const ch = registry.getChapterRepo(bookId).get(chapterId)
        if (!ch) throw new Error('Chapter not found')
        return ch
      })
  )

  ipcMain.handle(
    IPC.CHAPTER_UPDATE,
    (
      _event,
      {
        bookId,
        chapterId,
        title,
        content,
        status,
        cursorOffset
      }: {
        bookId: string
        chapterId: string
        title?: string
        content?: string
        status?: ChapterStatus
        cursorOffset?: number
      }
    ) =>
      wrap(() => {
        const chapter = registry.getChapterRepo(bookId).update(chapterId, {
          title,
          content,
          status,
          cursorOffset
        })
        ftsSync.upsert(
          registry.getDb(bookId),
          'chapter',
          chapter.id,
          chapter.title,
          chapter.content
        )
        registry.updateMeta(bookId, { lastChapterId: chapterId })
        return chapter
      })
  )

  ipcMain.handle(
    IPC.CHAPTER_DELETE,
    (_event, { bookId, chapterId }: { bookId: string; chapterId: string }) =>
      wrap(() => {
        registry.getChapterRepo(bookId).delete(chapterId)
        ftsSync.remove(registry.getDb(bookId), 'chapter', chapterId)
      })
  )

  ipcMain.handle(
    IPC.CHAPTER_REORDER,
    (_event, { bookId, volumeId, orderedIds }: { bookId: string; volumeId: string; orderedIds: string[] }) =>
      wrap(() => registry.getChapterRepo(bookId).reorderVolume(volumeId, orderedIds))
  )

  ipcMain.handle(
    IPC.CHAPTER_MOVE_TO_VOLUME,
    (
      _event,
      {
        bookId,
        chapterId,
        targetVolumeId,
        targetIndex
      }: { bookId: string; chapterId: string; targetVolumeId: string; targetIndex: number }
    ) =>
      wrap(() => registry.getChapterRepo(bookId).moveToVolume(chapterId, targetVolumeId, targetIndex))
  )

  ipcMain.handle(
    IPC.CHAPTER_SET_PUBLISH_STATUS,
    (
      _event,
      { bookId, chapterId, publishStatus }: { bookId: string; chapterId: string; publishStatus: PublishStatus }
    ) => wrap(() => registry.getChapterRepo(bookId).setPublishStatus(chapterId, publishStatus))
  )
}