export type ThemeId =
  | 'default'
  | 'bamboo'
  | 'moonlit'
  | 'ricepaper'
  | 'mist'
  | 'teagarden'
  | 'twilight'

export type Language = 'zh-CN' | 'en'
export type ChapterStatus = 'draft' | 'review' | 'done'
export type BookStatus = 'draft' | 'ongoing' | 'done'
export type PublishStatus = 'draft' | 'ready' | 'published'
export type OutlineStatus = 'pending' | 'writing' | 'done' | 'abandoned'
export type SettingType = 'character' | 'location' | 'item' | 'skill' | 'faction' | 'custom'
export type SnapshotType = 'auto' | 'manual' | 'persist' | 'ai'
export type LandmarkType = 'todo' | 'foreshadow' | 'research' | 'custom'
export type EditTargetKind = 'chapter' | 'outline' | 'setting' | 'inspiration'
export type EditTarget = { kind: EditTargetKind; id: string }
export type SearchScope = 'all' | 'volume' | 'chapter'
export type SearchSourceKind = 'chapter' | 'outline' | 'setting' | 'inspiration' | 'bookmark'

export type ActionId =
  | 'saveChapter'
  | 'newChapter'
  | 'focusMode'
  | 'globalSearch'
  | 'closeTab'
  | 'openReference'
  | 'insertLandmark'
  | 'openLandmarks'
  | 'exportBook'
  | 'toggleTTS'
  | 'captureInspiration'

export enum ErrorCode {
  DB_READ_FAILED = 'DB_READ_FAILED',
  DB_WRITE_FAILED = 'DB_WRITE_FAILED',
  FILE_NOT_FOUND = 'FILE_NOT_FOUND',
  IMPORT_INVALID = 'IMPORT_INVALID',
  UNKNOWN = 'UNKNOWN'
}

export interface IpcError {
  code: ErrorCode
  message: string
  recoverable: boolean
}

export type IpcResult<T> = { ok: true; data: T } | { ok: false; error: IpcError }

export interface GlobalSettings {
  penName: string
  onboardingCompleted: boolean
  theme: ThemeId
  language: Language
  dailyWordGoal: number
  shortcuts: Record<ActionId, string>
  snapshotIntervalMs: number
  snapshotMaxAuto: number
  snapshotMaxPersist: number
  searchHistory: string[]
  aiConfig: AiConfig
  namingIgnoreWords: string[]
}

export interface BookMeta {
  id: string
  name: string
  category: string
  targetWordCount: number | null
  dbPath: string
  status: BookStatus
  lastOpenedAt: string
  lastChapterId: string | null
  createdAt: string
}

export interface CreateBookParams {
  name: string
  category: string
  targetWordCount?: number | null
  createSampleChapter?: boolean
}

export interface Volume {
  id: string
  name: string
  description: string
  sortOrder: number
}

export interface Chapter {
  id: string
  volumeId: string | null
  title: string
  content: string
  status: ChapterStatus
  wordCount: number
  sortOrder: number
  cursorOffset: number
  publishStatus?: PublishStatus
  povCharacterId?: string | null
  summary?: string
  storyTime?: string | null
}

export interface OutlineItem {
  id: string
  parentId: string | null
  title: string
  description: string
  status: OutlineStatus
  expectedWordCount: number | null
  chapterId: string | null
  sortOrder: number
  createdAt: string
  updatedAt: string
  children?: OutlineItem[]
}

export interface SettingEntry {
  id: string
  type: SettingType
  name: string
  description: string
  properties: Record<string, unknown>
  chapterIds?: string[]
  createdAt: string
  updatedAt: string
}

export interface InspirationEntry {
  id: string
  title: string
  content: string
  tags: string[]
  createdAt: string
  updatedAt: string
}

export interface Snapshot {
  id: string
  chapterId: string
  type: SnapshotType
  name: string
  content: string
  createdAt: string
}

export interface Bookmark {
  id: string
  chapterId: string
  position: number
  label: string
  landmarkType: LandmarkType
  resolved: boolean
  createdAt: string
}

export interface SearchOptions {
  regex?: boolean
  caseSensitive?: boolean
  matchWholeWord?: boolean
}

export interface SearchResult {
  kind: SearchSourceKind
  id: string
  title: string
  snippet: string
  chapterId?: string
  position?: number
}

export interface WordFreqResult {
  words: { token: string; count: number }[]
}

export interface BookOpenResult {
  meta: BookMeta
  volumes: Volume[]
  chapters: Chapter[]
  outlines: OutlineItem[]
  settings: SettingEntry[]
  inspirations: InspirationEntry[]
}

export interface UpdateChapterParams {
  bookId: string
  chapterId: string
  title?: string
  content?: string
  status?: ChapterStatus
  cursorOffset?: number
}

export type AiBackend = 'lmstudio' | 'openai' | 'anthropic'
export type AiMessageRole = 'user' | 'assistant' | 'system'
export type AiWritingMode = 'chat' | 'interactive' | 'auto' | 'wizard'

export interface AiConfig {
  backend: AiBackend
  baseUrl: string
  model: string
  apiKey?: string
  timeoutMs: number
  maxTokens: number
}

export const DEFAULT_AI_CONFIG: AiConfig = {
  backend: 'lmstudio',
  baseUrl: 'http://127.0.0.1:1234',
  model: 'gemma-4-e4b-it',
  timeoutMs: 60_000,
  maxTokens: 2048
}

export interface AiContextBinding {
  chapterIds: string[]
  outlineIds: string[]
  settingIds: string[]
  inspirationIds: string[]
}

export interface AiSession {
  id: string
  title: string
  model: string
  archived: boolean
  context: AiContextBinding
  createdAt: string
  updatedAt: string
}

export interface AiMessage {
  id: string
  sessionId: string
  role: AiMessageRole
  content: string
  createdAt: string
}

export interface NamingConflict {
  termA: string
  termB: string
  confidence: number
  reason: string
  suggestedCanonical?: string
}

export interface AiStreamChunkEvent {
  messageId: string
  delta: string
  done: boolean
}

export interface AiNetworkStatusEvent {
  online: boolean
}

export type ContextPreviewKind = 'chapter' | 'outline' | 'setting' | 'inspiration'

export interface ContextPreviewItem {
  kind: ContextPreviewKind
  id: string
  title: string
  excerpt: string
  charCount: number
}

export interface AiContextBuildResult {
  systemPrompt: string
  preview: ContextPreviewItem[]
}