import prisma from './prisma'
import { unstable_cache } from 'next/cache'

const getCachedSystemConfig = unstable_cache(
  async () => {
    try {
      const configs = await prisma.systemConfig.findMany()
      return configs.reduce((acc, conf) => {
        acc[conf.key] = conf.value
        return acc
      }, {} as Record<string, string>)
    } catch (e) {
      console.error('Failed to load system config from DB:', e)
      return {}
    }
  },
  ['system-config'],
  { tags: ['system-config'] }
)

export async function getSystemConfig() {
  return getCachedSystemConfig()
}

/**
 * Get a config value with a default fallback
 */
export async function getConfigValue(key: string, defaultValue: string = ''): Promise<string> {
  const config = await getSystemConfig()
  return config[key] || defaultValue
}

/**
 * Get a numeric config value with a default fallback
 */
export async function getConfigNumber(key: string, defaultValue: number): Promise<number> {
  const value = await getConfigValue(key, String(defaultValue))
  const num = parseFloat(value)
  return isNaN(num) ? defaultValue : num
}

/**
 * Get a boolean config value with a default fallback
 */
export async function getConfigBoolean(key: string, defaultValue: boolean): Promise<boolean> {
  const value = await getConfigValue(key, String(defaultValue))
  return value === 'true'
}

/**
 * Search configuration defaults
 */
export const SEARCH_DEFAULTS = {
  SEMANTIC_THRESHOLD: 0.65,
  RRF_K_BASE: 20,
  RRF_K_ADAPTIVE: true,
  KEYWORD_BOOST_EXACT: 2.0,
  KEYWORD_BOOST_CONCEPTUAL: 0.7,
  SEMANTIC_BOOST_EXACT: 0.7,
  SEMANTIC_BOOST_CONCEPTUAL: 1.5,
  QUERY_EXPANSION_ENABLED: false,
  QUERY_EXPANSION_MAX_SYNONYMS: 3,
  DEBUG_MODE: false,
} as const