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

const DATA_DIR = process.env.NODE_ENV === 'production' && fs.existsSync('/data')
  ? '/data'
  : path.join(process.cwd(), 'data')
const FLUTTER_APPS_DIR = path.join(DATA_DIR, 'documents', 'flutter_apps')

export async function PUT(request: NextRequest) {
  try {
    const body = await request.json()
    const { name, dartCode, dependencies, pubspecYaml } = body

    if (!name) {
      return NextResponse.json(
        { success: false, error: 'App name is required' },
        { status: 400 }
      )
    }

    // Sanitize name
    const safeName = name.replace(/[^a-zA-Z0-9_-]/g, '_').toLowerCase()
    const fileName = `${safeName}.flutter.json`
    const filePath = path.join(FLUTTER_APPS_DIR, fileName)

    if (!fs.existsSync(filePath)) {
      return NextResponse.json(
        { success: false, error: `Flutter app '${safeName}' not found` },
        { status: 404 }
      )
    }

    // Read existing app
    const fileContent = fs.readFileSync(filePath, 'utf-8')
    const appData = JSON.parse(fileContent)

    // Update fields if provided
    if (dartCode !== undefined) {
      appData.dartCode = dartCode
    }
    if (dependencies !== undefined) {
      appData.dependencies = dependencies
    }
    if (pubspecYaml !== undefined) {
      appData.pubspecYaml = pubspecYaml
    }

    // Update metadata
    appData.metadata.modified = new Date().toISOString()

    // Save updated app
    fs.writeFileSync(filePath, JSON.stringify(appData, null, 2), 'utf-8')

    return NextResponse.json({
      success: true,
      appName: safeName,
      message: 'Flutter app updated successfully'
    })
  } catch (error) {
    console.error('Error updating Flutter app:', error)
    return NextResponse.json(
      { success: false, error: 'Failed to update Flutter app' },
      { status: 500 }
    )
  }
}