import { getDb } from './db'

interface ScanConfig {
  schedule: string
  enabled: boolean
  lastScanAt: number | null
}

function getSetting(key: string): string | null {
  const db = getDb()
  const row = db
    .prepare('SELECT value FROM app_settings WHERE key = ?')
    .get(key) as { value: string } | undefined
  return row?.value ?? null
}

function setSetting(key: string, value: string): void {
  const db = getDb()
  db.prepare('INSERT OR REPLACE INTO app_settings (key, value) VALUES (?, ?)').run(key, value)
}

export function getScanConfig(): ScanConfig {
  const schedule = getSetting('scan_schedule') ?? '0 * * * *'
  const enabled = getSetting('scan_enabled') !== 'false'
  const lastRanRaw = getSetting('scan_last_ran')
  const lastScanAt =
    lastRanRaw && lastRanRaw.length > 0 ? parseInt(lastRanRaw, 10) : null
  return { schedule, enabled, lastScanAt }
}

export function updateScanConfig(schedule: string, enabled: boolean): void {
  setSetting('scan_schedule', schedule)
  setSetting('scan_enabled', enabled ? 'true' : 'false')
}

export function setScanLastRan(ts: number): void {
  setSetting('scan_last_ran', String(ts))
}

// ─── AI Settings ─────────────────────────────────────────────────────────────

interface AiConfig {
  endpoint: string
  model: string
  modelTagging: string
  modelDescribe: string
  modelExtract: string
  modelTranslate: string
  enabled: boolean
}

export function getAiConfig(): AiConfig {
  const endpoint = getSetting('ai_endpoint') ?? ''
  const model = getSetting('ai_model') ?? ''
  const modelTagging = getSetting('ai_model_tagging') ?? ''
  const modelDescribe = getSetting('ai_model_describe') ?? ''
  const modelExtract = getSetting('ai_model_extract') ?? ''
  const modelTranslate = getSetting('ai_model_translate') ?? ''
  const enabled = getSetting('ai_enabled') === 'true'
  return { endpoint, model, modelTagging, modelDescribe, modelExtract, modelTranslate, enabled }
}

export function updateAiConfig(
  endpoint: string,
  model: string,
  enabled: boolean,
  modelTagging?: string,
  modelDescribe?: string,
  modelExtract?: string,
  modelTranslate?: string,
): void {
  setSetting('ai_endpoint', endpoint)
  setSetting('ai_model', model)
  setSetting('ai_enabled', enabled ? 'true' : 'false')
  if (modelTagging !== undefined) setSetting('ai_model_tagging', modelTagging)
  if (modelDescribe !== undefined) setSetting('ai_model_describe', modelDescribe)
  if (modelExtract !== undefined) setSetting('ai_model_extract', modelExtract)
  if (modelTranslate !== undefined) setSetting('ai_model_translate', modelTranslate)
}

export function getPreferredLanguage(): string {
  return getSetting('preferred_language') ?? 'English'
}

export function setPreferredLanguage(language: string): void {
  setSetting('preferred_language', language)
}