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

export function registerOutlineHandlers(registry: BookRegistryService): void {
  ipcMain.handle(IPC.OUTLINE_LIST, (_e, { bookId }: { bookId: string }) =>
    wrap(() => registry.getOutlineRepo(bookId).listFlat())
  )

  ipcMain.handle(
    IPC.OUTLINE_CREATE,
    (
      _e,
      {
        bookId,
        parentId,
        title,
        sortOrder
      }: { bookId: string; parentId?: string | null; title: string; sortOrder?: number }
    ) =>
      wrap(() => {
        const repo = registry.getOutlineRepo(bookId)
        const order = sortOrder ?? repo.nextSortOrder(parentId ?? null)
        const item = repo.create(parentId ?? null, title, order)
        const db = registry.getDb(bookId)
        ftsSync.upsert(db, 'outline', item.id, item.title, item.description)
        return item
      })
  )

  ipcMain.handle(
    IPC.OUTLINE_UPDATE,
    (
      _e,
      {
        bookId,
        id,
        patch
      }: {
        bookId: string
        id: string
        patch: Partial<{
          title: string
          description: string
          status: OutlineStatus
          expectedWordCount: number | null
          chapterId: string | null
          sortOrder: number
        }>
      }
    ) =>
      wrap(() => {
        const item = registry.getOutlineRepo(bookId).update(id, patch)
        const db = registry.getDb(bookId)
        ftsSync.upsert(db, 'outline', item.id, item.title, item.description)
        return item
      })
  )

  ipcMain.handle(IPC.OUTLINE_DELETE, (_e, { bookId, id }: { bookId: string; id: string }) =>
    wrap(() => {
      registry.getOutlineRepo(bookId).delete(id)
      ftsSync.remove(registry.getDb(bookId), 'outline', id)
    })
  )

  ipcMain.handle(
    IPC.OUTLINE_MOVE,
    (
      _e,
      {
        bookId,
        id,
        parentId,
        sortOrder
      }: { bookId: string; id: string; parentId?: string | null; sortOrder: number }
    ) => wrap(() => registry.getOutlineRepo(bookId).move(id, parentId ?? null, sortOrder))
  )
}