export type Term = '春' | '暑' | '秋' | '寒'

export interface StudentProfile {
  id: string
  name: string
  grade: string
  subject: string
  academicYear: number
  term: Term
  guardianTitle: string
  startTime: string
  endTime: string
  createdAt: number
  updatedAt: number
}

export interface StudentProfileDefaults {
  grade: string
  subject: string
  lessonDurationMinutes: number
}

export interface StudentDraft {
  name: string
  grade: string
  subject: string
  academicYear: number
  term: Term
  guardianTitle: string
  startTime: string
  endTime: string
}

export interface FeedbackRecord {
  id: string
  profileId: string | null
  feedbackDate: string
  content: string
  createdAt: number
  updatedAt: number
}

export interface FeedbackDraft {
  profileId: string | null
  feedbackDate: string
  content: string
  feedbackSessionId?: string | null
}

export interface HealthStatus {
  status: string
  databaseConfigured: boolean
  speechConfigured: boolean
  speechAvailable: boolean
  speechProvider: string | null
  summaryConfigured: boolean
  wechatAuthConfigured: boolean
  developmentAuthEnabled: boolean
}

export type VoiceProcessingStatus = 'recording' | 'processing' | 'ready' | 'failed'

export interface VoiceAudioSegment {
  id: string
  sequence: number
  durationMs: number
  status: 'processing' | 'ready' | 'failed'
  errorMessage: string | null
}

export interface VoiceLesson {
  id: string
  sequence: number
  status: VoiceProcessingStatus
  durationMs: number
  appliedDirectly: boolean
  includedInGeneration: boolean
  transcript: string
  segments: VoiceAudioSegment[]
  startedAt: number
  endedAt: number | null
}

export interface FeedbackSession {
  id: string
  profileId: string | null
  feedbackDate: string
  content: string
  status: 'active' | 'finalized'
  lessonCount: number
  totalDurationMs: number
  processingSegmentCount: number
  failedSegmentCount: number
  needsGeneration: boolean
  lessons: VoiceLesson[]
  latestSummaryRun: FeedbackSummaryRun | null
  createdAt: number
  updatedAt: number
}

export type FeedbackSummaryStatus = 'queued' | 'processing' | 'ready' | 'failed' | 'applied'

export interface FeedbackSummaryRun {
  id: string
  feedbackSessionId: string
  lessonIds: string[]
  status: FeedbackSummaryStatus
  content: string | null
  method: string | null
  model: string | null
  promptVersion: string
  characterCount: number | null
  errorMessage: string | null
  attempts: number
  createdAt: number
  completedAt: number | null
  appliedAt: number | null
}

export interface VoiceLessonCreated {
  id: string
  sequence: number
  status: VoiceProcessingStatus
  startedAt: number
}

export interface VoiceLessonFinished {
  id: string
  status: VoiceProcessingStatus
  durationMs: number
  transcript: string
  canApplyDirectly: boolean
}

export interface GeneratedFeedback {
  content: string
  method: 'llm' | 'llm_hierarchical' | 'extractive'
}