import express from 'express'
import * as z from 'zod'

import { Database } from './db'

const app = express()
const db = new Database({ readonly: true })

app.get('/', (req, res) => {
  const { id } = z
    .object({
      id: z.string(),
    })
    .parse(req.query)

  const r = db.get(id)
  if (!r) {
    res.sendStatus(404)
    return
  }

  res.json(r)
})

app.get('/q', (req, res) => {
  const { q, tag, page: _page = '1' } = z
    .object({
      q: z.string().optional(),
      tag: z.string().optional(),
      page: z
        .string()
        .refine((s) => /^\d+$/.test(s))
        .optional(),
    })
    .parse(req.query)

  const perPage = 5
  const offset = (parseInt(_page) - 1) * perPage

  if (q) {
    res.json(
      db.q(`${q} ${tag ? `tag:${tag}` : ''}`, {
        offset,
        limit: perPage,
      })
    )
    return
  }

  res.json(
    db.by(tag ? `tag:${tag}` : '', {
      offset,
      limit: perPage,
    })
  )
})

export default app