import type { NextApiRequest, NextApiResponse } from "next"
import { db, schema } from '../../../lib/db/connection'
import { eq, desc, count } from 'drizzle-orm'

export default async function handler(req: NextApiRequest, res: NextApiResponse) {
  if (req.method !== "GET") return res.status(405).json({ error: "Method not allowed" })
  
  const { 
    status = 'verified',
    page = '1',
    limit = '20'
  } = req.query
  
  try {
    // Pagination
    const pageNum = parseInt(page as string)
    const limitNum = parseInt(limit as string)
    const offset = (pageNum - 1) * limitNum

    const results = await db.select({
      id: schema.sources.id,
      domain: schema.sources.domain,
      title: schema.sources.title,
      description: schema.sources.description,
      type: schema.sources.type,
      status: schema.sources.status,
      riskLevel: schema.sources.riskLevel,
      createdAt: schema.sources.createdAt,
    })
    .from(schema.sources)
    .where(eq(schema.sources.status, status as any))
    .orderBy(desc(schema.sources.createdAt))
    .limit(limitNum)
    .offset(offset)

    // Get total count
    const totalResult = await db.select({ count: count() })
      .from(schema.sources)
      .where(eq(schema.sources.status, status as any))

    const total = totalResult[0].count

    res.json({
      results,
      pagination: {
        page: pageNum,
        limit: limitNum,
        total,
        pages: Math.ceil(total / limitNum)
      }
    })

  } catch (error) {
    console.error('Advanced search error:', error)
    res.status(500).json({ error: "Search failed" })
  }
}