import { VercelRequest, VercelResponse } from '@vercel/node'
import axios from 'axios'

import dbConnect from '../lib/dbConnect'
import URLModel from '../lib/schema'

export default async (request: VercelRequest, response: VercelResponse) => {
  const { method } = request
  await dbConnect()

  switch (method) {
    case 'POST':
      if (!request.body || !request.body.url) {
        return response.status(400).json({
          success: false,
          message: 'Invalid body'
        })
      }

      try {
        await axios.get(request.body.url)
      } catch (err) {
        console.error(err)
        return response.status(400).json({
          success: false,
          message: 'Invalid URL'
        })
      }

      try {
        const url = new URLModel({
          url: request.body.url
        })

        await url.save()

        return response.status(200).json({
          success: true,
          url,
          message: `Added ${url.url}`
        })
      } catch (err) {
        console.error(err)
        return response.status(400).json({
          success: false,
          message: 'Already exist?'
        })
      }
    case 'DELETE':
      if (!request.query.url) {
        return response.status(400).json({
          success: false,
          message: 'Invalid body'
        })
      }

      try {
        const url = request.query.url

        if (typeof url != 'string') {
          return response.status(400).json({
            success: false,
            message: 'Query URL isn\'t string'
          })
        }

        const del = await URLModel.findOneAndDelete({
          url
        })

        if (del != null) {
          return response.status(200).json({
            success: true,
            message: `Deleted ${url}`,
            url
          })
        } else {
          return response.status(400).json({
            success: false,
            message: 'URL not exist?',
            url
          })
        }
      } catch (err) {
        console.error(err)
        return response.status(400).json({
          success: false,
          message: 'Error Deleting from DB'
        })
      }
    default:
      response.status(200).json({
        db: await URLModel.find()
      })

      break
  }
}