import { NextRequest, NextResponse } from 'next/server'

/**
 * SDK Export API
 *
 * GET /api/sdk/v1/export?format=json|pdf|zip - Export SDK data
 */

export async function GET(request: NextRequest) {
  try {
    const { searchParams } = new URL(request.url)
    const format = searchParams.get('format') || 'json'
    const tenantId = searchParams.get('tenantId') || 'default'

    switch (format) {
      case 'json':
        return exportJSON(tenantId)

      case 'pdf':
        return exportPDF(tenantId)

      case 'zip':
        return exportZIP(tenantId)

      default:
        return NextResponse.json(
          { error: `Unknown export format: ${format}` },
          { status: 400 }
        )
    }
  } catch (error) {
    console.error('Failed to export:', error)
    return NextResponse.json(
      { error: 'Failed to export' },
      { status: 500 }
    )
  }
}

function exportJSON(tenantId: string) {
  // In production, this would fetch the actual state from the database
  const exportData = {
    version: '1.0.0',
    exportedAt: new Date().toISOString(),
    tenantId,
    data: {
      useCases: [],
      screening: null,
      modules: [],
      requirements: [],
      controls: [],
      evidence: [],
      risks: [],
      dsfa: null,
      toms: [],
      vvt: [],
      documents: [],
    },
  }

  return new NextResponse(JSON.stringify(exportData, null, 2), {
    status: 200,
    headers: {
      'Content-Type': 'application/json',
      'Content-Disposition': `attachment; filename="compliance-export-${tenantId}-${new Date().toISOString().split('T')[0]}.json"`,
    },
  })
}

function exportPDF(tenantId: string) {
  // In production, this would generate a proper PDF using a library like pdfkit or puppeteer
  // For now, return a placeholder response
  return NextResponse.json({
    success: false,
    error: 'PDF export not yet implemented',
    message: 'PDF generation requires server-side rendering. Use JSON export for now.',
  }, { status: 501 })
}

function exportZIP(tenantId: string) {
  // In production, this would create a ZIP file with multiple documents
  // For now, return a placeholder response
  return NextResponse.json({
    success: false,
    error: 'ZIP export not yet implemented',
    message: 'ZIP generation requires additional server-side processing. Use JSON export for now.',
  }, { status: 501 })
}