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
  const db = 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) {
        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: request.body.url
          }
        )
      } catch (err) {
        console.log(err)
        return response.status(400).json(
          {
            success: false,
            message: 'Error Inserting to DB'
          }
        )
      }

      break
    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'
            }
          )
        }

        await URLModel.deleteOne({
          url
        })

        return response.status(200).json(
          {
            success: true,
            message: 'Deleted!',
            url
          }
        )
      } catch (err) {
        console.log(err)
        return response.status(400).json(
          {
            success: false,
            message: 'Error Deleting from DB'
          }
        )
      }

      break
    default:
      const urls = await URLModel.find()

      response.status(200).json(
        {
          db: urls
        }
      )

      break
  }
}