import { db } from '~/drizzle/db'
import { systemSettings } from '~/drizzle/schema'
import { cacheService } from '../services/cacheService'
import { isRedisReady } from '../utils/redis'

// 过滤敏感字段，只返回公开配置
const publicFields = [
  'siteTitle',
  'siteLogoUrl',
  'schoolLogoHomeUrl',
  'schoolLogoPrintUrl',
  'siteDescription',
  'siteVersion',
  'submissionGuidelines',
  'icpNumber',
  'gonganNumber',
  'enablePlayTimeSelection',
  'enableSubmissionLimit',
  'dailySubmissionLimit',
  'weeklySubmissionLimit',
  'monthlySubmissionLimit',
  'showBlacklistKeywords',
  'hideStudentInfo',
  'enableReplayRequests',
  'enableCollaborativeSubmission',
  'enableSubmissionRemarks',
  'enableRequestTimeLimitation',
  'forceBlockAllRequests',
  'smtpEnabled',
  'defaultTheme',
  'enabledThemes',
  'scheduleDaysBeforeEnabled',
  'scheduleDaysBefore',
  'scheduleDaysAfterEnabled',
  'scheduleDaysAfter'
]

const filterPublicSettings = (data: any) => {
  if (!data) {
    return {}
  }
  const result: Record<string, any> = {}
  for (const key of publicFields) {
    if (Object.prototype.hasOwnProperty.call(data, key)) {
      result[key] = data[key]
    }
  }
  return result
}

export default defineEventHandler(async (event) => {
  try {
    // 优先从Redis缓存获取系统设置
    if (isRedisReady()) {
      const cachedSettings = await cacheService.getSystemSettings()
      if (cachedSettings) {
        console.log('[API] 系统设置缓存命中')
        return filterPublicSettings(cachedSettings)
      }
    }

    // 缓存未命中或Redis不可用，从数据库获取
    const settingsResult = await db.select().from(systemSettings).limit(1)
    let settings = settingsResult[0] || null

    if (!settings) {
      // 如果不存在，创建默认设置
      const newSettings = await db
        .insert(systemSettings)
        .values({
          enablePlayTimeSelection: false,
          siteTitle: 'VoiceHub',
          siteLogoUrl: '/images/site-logo.png',
          schoolLogoHomeUrl: '/images/school-logo-white.png',
          schoolLogoPrintUrl: '/images/school-logo-transparent.png',
          siteDescription: '校园广播站点歌系统 - 让你的声音被听见',
          siteVersion: process.env.NUXT_PUBLIC_SITE_VERSION || null,
          submissionGuidelines: '请遵守校园规定，提交健康向上的歌曲。',
          icpNumber: null,
          enableSubmissionLimit: false,
          dailySubmissionLimit: null,
          weeklySubmissionLimit: null,
          showBlacklistKeywords: false,
          hideStudentInfo: true,
          enableCollaborativeSubmission: true,
          enableSubmissionRemarks: false,
          enableRequestTimeLimitation: false,
          forceBlockAllRequests: false,
          enableReplayRequests: false,
          smtpEnabled: false,
          defaultTheme: 'System',
          enabledThemes: '["System","ClassicDark","ClassicLight","ModernLight"]',
          scheduleDaysBeforeEnabled: false,
          scheduleDaysBefore: 30,
          scheduleDaysAfterEnabled: false,
          scheduleDaysAfter: 14
        })
        .returning()

      settings = newSettings[0]
    }

    const publicSettings = filterPublicSettings(settings)

    // 将结果缓存到Redis（如果可用）- 永久缓存
    if (settings && isRedisReady()) {
      await cacheService.setSystemSettings(settings)
      console.log('[API] 系统设置已缓存到Redis')
    }

    return publicSettings
  } catch (error) {
    console.error('获取系统设置失败:', error)
    throw createError({
      statusCode: 500,
      statusMessage: '获取系统设置失败'
    })
  }
})