import { NextRequest, NextResponse } from 'next/server'
import { requireAuth } from '@/lib/auth'
import { readConfig } from '@/lib/config'
import { testDb, getDbStats, getTables, runQuery } from '@/lib/db'

export async function GET(req: NextRequest) {
  const err = await requireAuth(req)
  if (err) return err

  const dbId = req.nextUrl.searchParams.get('dbId')
  const action = req.nextUrl.searchParams.get('action') ?? 'stats'

  if (!dbId) return NextResponse.json({ error: 'dbId gerekli' }, { status: 400 })

  const config = await readConfig()
  const db = config.databases.find(d => d.id === dbId)
  if (!db) return NextResponse.json({ error: 'DB bulunamadı' }, { status: 404 })

  if (action === 'test') return NextResponse.json(await testDb(db))
  try {
    if (action === 'stats') return NextResponse.json(await getDbStats(db))
    if (action === 'tables') return NextResponse.json(await getTables(db))
  } catch (e: unknown) {
    return NextResponse.json({ error: e instanceof Error ? e.message : 'Bağlantı hatası' }, { status: 400 })
  }

  return NextResponse.json({ error: 'Geçersiz action' }, { status: 400 })
}

export async function POST(req: NextRequest) {
  const err = await requireAuth(req)
  if (err) return err

  const body = await req.json()
  if (body.action === 'test') {
    return NextResponse.json(await testDb(body.db))
  }

  const { dbId, sql } = body
  const config = await readConfig()
  const db = config.databases.find(d => d.id === dbId)
  if (!db) return NextResponse.json({ error: 'DB bulunamadı' }, { status: 404 })

  return NextResponse.json(await runQuery(db, sql))
}