import { createLogger } from '@sim/logger'
import { getErrorMessage } from '@sim/utils/errors'
import Redis from 'ioredis'
import { type NextRequest, NextResponse } from 'next/server'
import { redisExecuteContract } from '@/lib/api/contracts/tools/databases/redis'
import { parseToolRequest } from '@/lib/api/server'
import { checkInternalAuth } from '@/lib/auth/hybrid'
import { validateDatabaseHost } from '@/lib/core/security/input-validation.server'
import { withRouteHandler } from '@/lib/core/utils/with-route-handler'

const logger = createLogger('RedisAPI')

export const POST = withRouteHandler(async (request: NextRequest) => {
  let client: Redis | null = null

  try {
    const auth = await checkInternalAuth(request)
    if (!auth.success || !auth.userId) {
      return NextResponse.json({ error: auth.error || 'Unauthorized' }, { status: 401 })
    }

    const parsed = await parseToolRequest(redisExecuteContract, request, {
      errorFormat: 'firstError',
      logger,
    })
    if (!parsed.success) return parsed.response
    const { url, command, args } = parsed.data.body

    const parsedUrl = new URL(url)
    const hostname =
      parsedUrl.hostname.startsWith('[') && parsedUrl.hostname.endsWith(']')
        ? parsedUrl.hostname.slice(1, -1)
        : parsedUrl.hostname
    const hostValidation = await validateDatabaseHost(hostname, 'host')
    if (!hostValidation.isValid) {
      return NextResponse.json({ error: hostValidation.error }, { status: 400 })
    }

    const resolvedIP = hostValidation.resolvedIP ?? hostname
    const tlsEnabled = parsedUrl.protocol === 'rediss:'
    const port = parsedUrl.port ? Number(parsedUrl.port) : 6379
    const username = parsedUrl.username ? decodeURIComponent(parsedUrl.username) : undefined
    const password = parsedUrl.password ? decodeURIComponent(parsedUrl.password) : undefined

    let db = 0
    if (parsedUrl.pathname && parsedUrl.pathname.length > 1) {
      const dbSegment = parsedUrl.pathname.slice(1)
      const parsedDb = Number.parseInt(dbSegment, 10)
      if (!Number.isFinite(parsedDb) || String(parsedDb) !== dbSegment) {
        return NextResponse.json(
          { error: `Invalid Redis database index in URL path: '${dbSegment}'` },
          { status: 400 }
        )
      }
      db = parsedDb
    }

    client = new Redis({
      host: resolvedIP,
      port,
      username,
      password,
      db,
      family: resolvedIP.includes(':') ? 6 : 4,
      tls: tlsEnabled ? { servername: hostname } : undefined,
      connectTimeout: 10000,
      commandTimeout: 10000,
      maxRetriesPerRequest: 1,
      lazyConnect: true,
    })

    await client.connect()

    const cmd = command.toUpperCase()
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    const result = await (client as any).call(cmd, ...args)

    await client.quit()
    client = null

    return NextResponse.json({ result })
  } catch (error) {
    logger.error('Redis command failed', { error })
    const errorMessage = getErrorMessage(error, 'Redis command failed')
    return NextResponse.json({ error: errorMessage }, { status: 500 })
  } finally {
    if (client) {
      try {
        await client.quit()
      } catch {
        client.disconnect()
      }
    }
  }
})