import { randomUUID } from 'crypto'
import type { InspirationEntry, SettingType } from '../../../shared/types'
import type { SqliteDb } from '../types'
import { stripHtml } from '../../services/word-count'
import type { OutlineRepository } from './outline.repo'
import type { SettingRepository } from './setting.repo'

function mapRow(row: Record<string, unknown>): InspirationEntry {
  let tags: string[] = []
  try {
    tags = JSON.parse((row.tags as string) || '[]') as string[]
  } catch {
    tags = []
  }
  return {
    id: row.id as string,
    title: row.title as string,
    content: row.content as string,
    tags,
    createdAt: row.created_at as string,
    updatedAt: row.updated_at as string
  }
}

export class InspirationRepository {
  constructor(private db: SqliteDb) {}

  create(title = '', content = '', tags: string[] = []): InspirationEntry {
    const id = randomUUID()
    this.db
      .prepare(`INSERT INTO inspiration (id, title, content, tags) VALUES (?, ?, ?, ?)`)
      .run(id, title, content, JSON.stringify(tags))
    return this.get(id)!
  }

  get(id: string): InspirationEntry | null {
    const row = this.db.prepare('SELECT * FROM inspiration WHERE id = ?').get(id) as
      | Record<string, unknown>
      | undefined
    return row ? mapRow(row) : null
  }

  list(): InspirationEntry[] {
    return (
      this.db.prepare('SELECT * FROM inspiration ORDER BY updated_at DESC').all() as Record<string, unknown>[]
    ).map(mapRow)
  }

  update(
    id: string,
    patch: Partial<{ title: string; content: string; tags: string[] }>
  ): InspirationEntry {
    const existing = this.get(id)
    if (!existing) throw new Error('Inspiration not found')

    this.db
      .prepare(
        `UPDATE inspiration SET title = ?, content = ?, tags = ?, updated_at = datetime('now') WHERE id = ?`
      )
      .run(
        patch.title ?? existing.title,
        patch.content ?? existing.content,
        JSON.stringify(patch.tags ?? existing.tags),
        id
      )
    return this.get(id)!
  }

  delete(id: string): void {
    this.db.prepare('DELETE FROM inspiration WHERE id = ?').run(id)
  }

  convertToOutline(id: string, outlineRepo: OutlineRepository) {
    const item = this.get(id)
    if (!item) throw new Error('Inspiration not found')

    const outline = outlineRepo.create(null, item.title || '未命名灵感', outlineRepo.nextSortOrder(null))
    outlineRepo.update(outline.id, { description: stripHtml(item.content) })
    this.delete(id)
    return outlineRepo.get(outline.id)!
  }

  convertToSetting(id: string, type: SettingType, settingRepo: SettingRepository) {
    const item = this.get(id)
    if (!item) throw new Error('Inspiration not found')

    const setting = settingRepo.create(type, item.title || '未命名设定', stripHtml(item.content))
    this.delete(id)
    return setting
  }
}