const fastify = require('fastify')({
   logger: true
})
const _ = require("lodash")
const db = require("./lib/db")

const settings = require("./settings")

/////////////////////////////////////////////////////////////////////////

// AUTH
fastify.addHook("onRequest", async (req, res) => {
   const token = req.query.token
   if (token !== settings.authtoken) {
      console.error("# AUTH ERROR #", token)
      await promiseDelay(500) // delay response to avoid denial of service attacks
      res.code(403)
      return res.send({status: "error", error: "access denied"})
   }
   else {}
})

fastify
   /////// USER ////////////////////////////////////////////////////////////////
   .get('/users', async function (req, res) {
      const {offset, limit} = req.query
      const users = await db.getUsers(offset, limit)
      return res.send(users)
   })
   .get("/users/count", async function (req, res) {
      const count = await db.getUserCount()
      return res.send(count)
   })
   .get("/user/login/:login", async function (req, res) {
      const {login} = req.params
      const user = await db.getUserByLogin(login)
      if (user.length) {
         return res.send(user[0])
      }
      else {
         return res.code(404).send({status: "error", msg: "not found"})
      }
   })
   .get("/user/userid/:userid", async function (req, res) {
      const {userid} = req.params
      const user = await db.getUserByUserId(userid)
      if (user) {
         return res.send(user)
      }
      else {
         return res.code(404).send({status: "error", msg: "not found"})
      }
   })

   /////// ref_id / obj_id  ////////////////////////////////////////////////////////////////

   .get("/ref_id/:ref_id", async function (req, res) {
      const {ref_id} = req.params
      const data = await db.getObjIdFromRefId(ref_id)
      if (data) {
         return res.send(data)
      }
      else {
         return res.code(404).send({status: "error", msg: "not found"})
      }
   })
   .get("/obj_id/:obj_id", async function (req, res) {
      const {obj_id} = req.params
      let data = await db.getRefIdFromObjId(obj_id)
      if (data) {
         return res.send(data)
      }
      else {
         return res.code(404).send({status: "error", msg: "not found"})
      }
   })

   /////// Kurs ////////////////////////////////////////////////////////////////
   .get("/kurs", async function (req, res) {
      let data = await db.getKurse()
      if (data) {
         return res.send(data)
      }
      else {
         return res.code(404).send({status: "error", msg: "not found"})
      }
   })
   .get("/kurs/:refId", async function (req, res) {
      const {refId} = req.params
      let data = await db.getKurs(refId)
      if (data) {
         return res.send(data)
      }
      else {
         return res.code(404).send({status: "error", msg: "not found"})
      }
   })
   .get("/kurs/items/:refId", async function (req, res) {
      const {refId} = req.params
      let data = await db.getKursItems(refId)
      if (data) {
         return res.send(data)
      }
      else {
         return res.code(404).send({status: "error", msg: "not found"})
      }
   })
   .get("/kurs/teilnehmer/:refId", async function (req, res) {
      const {refId} = req.params
      let data = await db.getKursTeilnehmer(refId)
      if (data) {
         return res.send(data)
      }
      else {
         return res.code(404).send({status: "error", msg: "not found"})
      }
   })
   .get("/kurs/teilnehmer/:refId/count", async function (req, res) {
      const {refId} = req.params
      let data = await db.getKursTeilnehmerCount(refId)
      if (data) {
         return res.send(data)
      }
      else {
         return res.code(404).send({status: "error", msg: "not found"})
      }
   })



/////////////////////////////////////////////////////////////////////////

fastify.listen({port: settings.port}, function (err, address) {
   console.log("📡 -=> Listening on", address)
   if (err) {
      fastify.log.error(err)
      process.exit(1)
   }
   // Server is now listening on ${address}
})

/////////////////////////////////////////////////////////////////////////

async function promiseDelay (ms) {
   return new Promise(resolve => setTimeout(resolve, ms))
}