import type { NextApiRequest, NextApiResponse } from "next"
import sqlite3 from "sqlite3"
import path from "path"

interface BulkImportItem {
  domain: string
  risk_level: number
  categories: string[]
  description?: string
}

export default async function handler(req: NextApiRequest, res: NextApiResponse) {
  if (req.method !== "POST") return res.status(405).json({ error: "Method not allowed" })
  
  const { sources } = req.body as { sources: BulkImportItem[] }
  
  if (!sources || !Array.isArray(sources)) {
    return res.status(400).json({ error: "Sources array required" })
  }
  
  const dbPath = path.join(process.cwd(), "database", "antihoax.db")
  const db = new sqlite3.Database(dbPath)
  
  try {
    let imported = 0
    let skipped = 0
    
    for (const source of sources) {
      if (!source.domain || !source.risk_level) {
        skipped++
        continue
      }
      
      // Check if domain already exists
      const existing = await new Promise<any>((resolve, reject) => {
        db.get(
          "SELECT id FROM sources WHERE domain = ?",
          [source.domain],
          (err, row) => {
            if (err) reject(err)
            else resolve(row)
          }
        )
      })
      
      if (existing) {
        skipped++
        continue
      }
      
      // Insert new source
      await new Promise<void>((resolve, reject) => {
        db.run(
          `INSERT INTO sources (domain, title, risk_level, status, description, created_at)
           VALUES (?, ?, ?, 'verified', ?, datetime('now'))`,
          [source.domain, source.domain, source.risk_level, source.description || ''],
          function(err) {
            if (err) reject(err)
            else resolve()
          }
        )
      })
      
      imported++
    }
    
    res.json({ 
      success: true, 
      imported,
      skipped,
      total: sources.length
    })
    
  } catch (error) {
    console.error('Bulk import error:', error)
    res.status(500).json({ error: "Import failed" })
  } finally {
    db.close()
  }
}