/* Lib for interacting with customized ILIAS php */
const _ = require("lodash")
const settings = require("../settings")
const {getObjIdFromRefId} = require("./db")
const db = require("./db")
const {url, iliastoken} = settings.ilias
const search = require("./search")

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

module.exports = {
   ping,

   getUser,

   importIliasUser,

   createKurs,

   anmelden,
   abmelden,

   deleteUser,
   deleteAllUsers,
   // deleteTeilnahme,


}

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

async function ping() {
   const sp = new URLSearchParams({
      command: "ping",
      token: iliastoken,
   })
   let url2 = `${url}?${sp.toString()}`
   const res = await fetch(url2, {method: "GET"})
   return await res.json() //
}

/////// GET USER ////////////////////////////////////////////////////////////////
async function getUser (usr_id) {
   const sp = new URLSearchParams({
      command: "getUser",
      usr_id,
      token: iliastoken,
   })
   let url2 = `${url}?${sp.toString()}`
   const res = await fetch(url2, {method: "GET"})
   return await res.json() //
}

/////// USER IMPORT ////////////////////////////////////////////////////////////////

/**
 * Format in POPCORN für SOAP; ausprobieren ob das hier auch funktioniert, v.a. die user-defined-fields
 *   const user = {
 *       login: "123456789",
 *       passwd: "123456789",
 *       passwd_type: "plain",
 *       firstname: "Adolfo",
 *       lastname: "de la Cruz",
 *       email: "alex@gorillaeis.com",
 *       gender: "m",
 *       department: "Bananenpflücker",
 *       institution: "Globus Budapest",
 *       role: 4, // assigned global role id
 *       udf: {
 *          "Markt": "Markt UDF 2",
 *          "Marktnummer": "Marktnummer UDF 2",
 *          "Personalnummer": "Personal UDF 2",
 *       },
 *    }
 * @param user
 * @returns {Promise<any>}
 */
async function importIliasUser (user) {
   const sp = new URLSearchParams({
      command: "importUser",
      token: iliastoken,
   })
   let url2 = `${url}?${sp.toString()}`

   const udfDef = await db.getUdf()
   const udfMap = _.keyBy(udfDef, "field_name")
   user.udf = _.mapKeys(user.udf, function (value, key) {
      return udfMap[key].field_id
   })

   const res = await fetch(url2, {
      method: "POST",
      body: JSON.stringify(user)
   })
   const text = await res.text()
   try {
      return JSON.parse(text)
   } catch (ex) {
      console.error(ex.message)
      console.log(text)
      throw ex
   }
}

/////// USER DELETE ////////////////////////////////////////////////////////////////

async function deleteUser (obj_id, dry = false) {
   const sp = new URLSearchParams({
      command: "deleteUser",
      obj_id,
      // dry: "1",
      dry: dry ? "1" : "0",
      token: iliastoken,
   })
   let url2 = `${url}?${sp.toString()}`
   const res = await fetch(url2, {method: "DELETE"})
   const data = await res.json()
   // TODO update search index
   return data //
}

async function deleteAllUsers () {
   const {data: users} = await db.getUsers(0, 100000)
   const res = {
      command: "deleteAllUsers",
      start: new Date(),
      end: new Date(),
      duration: null,
      count: 0,
      userIds: [],
   }
   for (const user of users) {
      await deleteUser(user.usr_id)
      res.count += 1
      res.userIds.push(user.usr_id)
   }
   res.end = new Date()
   res.duration = res.end - res.start
   // TODO update search index
   return res
}

// async function deleteTeilnahme (ref_id, usr_id, dry = false) {
//    const {obj_id} = await getObjIdFromRefId(ref_id)
//    const sp = new URLSearchParams({
//       command: "deleteTeilnahme",
//       course_id: obj_id,
//       usr_id,
//       dry: dry ? "1" : "0",
//       token: iliastoken,
//    })
//    let url2 = `${url}?${sp.toString()}`
//    console.log("libIlias.deleteTeilnahme >>>", url2)
//    let res
//    try {
//       res = await fetch(url2, {method: "DELETE"})
//       return await res.json()
//    } catch (ex) {
//       console.error(ex)
//       throw ex
//    }
// }

/////// KURS ////////////////////////////////////////////////////////////////

async function createKurs(kurs) {
   const sp = new URLSearchParams({
      command: "createKurs",
      token: iliastoken,
   })
   let url2 = `${url}?${sp.toString()}`
   const res = await fetch(url2, {
      method: "POST",
      body: JSON.stringify(kurs),
   })
   return await res.json()
}


/////// Anmelden / Abmelden ////////////////////////////////////////////////////////////////

async function anmelden (usr_id, course_id) {
   // const role = await db.getMemberRoleForCourse(course_id) // nein es wird relative id gebraucht, siehe php
   const sp = new URLSearchParams({
      command: "anmelden",
      usr_id,
      course_id,
      token: iliastoken,
   })
   let url2 = `${url}?${sp.toString()}`
   console.log(url2)
   const res = await fetch(url2, {method: "POST"})
   return await res.json()
}

async function abmelden (usr_id, course_id) {
   const sp = new URLSearchParams({
      command: "abmelden",
      usr_id,
      course_id,
      token: iliastoken,
   })
   let url2 = `${url}?${sp.toString()}`
   console.log(url2)
   const res = await fetch(url2, {method: "DELETE"})
   return await res.json()
}