const express = require("express");
const fs = require("fs-extra");
const dayjs=require('dayjs');
const path = require("path");
// Classes
const Pagans = require("../models/Pagans.js");
const Odmdb = require("../models/Odmdb.js");
// Middlewares
const checkHeaders = require("../middlewares/checkHeaders.js");
const isAuthenticated = require("../middlewares/isAuthenticated.js");

const conf = require(`../../../conf.json`);
const currentmod = "pagans";
const log = conf.api.activelog.includes(currentmod);

const router = express.Router();
/**
 *  /api/models/Pagans.js
 * 
 * Managed:

/**
 * Alias exist then return public key or not 
 * @api {get} adminapi/pagans/alias/:alias - alias Get 
 * @apiName isalias
 * @apiGroup Pagans
 * @apiDescription If alias exist return its publickey
 * 
 * @param {string} alias 
 * 
 * @apiError {json} aliasdoesnotexist  
 * @apiErrorExample {json}
 * HTTP/1.1 404 Not Found
   {"status":404,"ref":"pagans","msg":"aliasdoesnotexist","data": { alias}}
 *
 * @apiSuccess {object}  indexfile content
 * @apiSuccessExample {json} Success-Response:
 * HTTP/1.1 200 OK
 * {"status":200, ref:"pagans","msg":"aliasexist","data": { alias, publicKey }}
 *  *
 **/
router.get("/alias/:alias", (req, res) => {
  const getalias = Pagans.getalias(req.params.alias);
  res.status(getalias.status).send(getalias);
});
/**
 * @api {get} adminapi/pagans/logout - pagan Logout
 * @apiName Removetoken
 * @apiGroup Pagans
 * @apiDescription Remove server's token only the owner of the token (no one else can delete a token )
 *
 * @apiSuccess {object}  indexfile content
 * @apiSuccessExample {json} Success-Response:
 * HTTP/1.1 200 OK
 * {status: 200, ref: "Pagans", msg: "logout"
 *
 */
router.get("/logout", checkHeaders, isAuthenticated, (req, res) => {
  if (log) console.log(currentmod,"Logout:",req.session.header);
  const logout = Pagans.logout(
    req.session.header.xalias,
    req.session.header.xtribe,
    req.session.header.xdays,
    req.session.header.xhash
  );
  res.status(logout.status).json(logout);
});
/**
 * @api {get} adminapi/pagans/isauth  - pagan isAuthenticated?
 * @apiName isAuth
 * @apiGroup Pagans
 * @apiDescription Check if pagan's token is still valid
 *
 * @apiError (400) missingheaders
 * @apiError (400) xaliasdoesnotexist
 * @apiError (400) signaturefailled
 * @apiError (401) aliasanonymous
 * @apiError (404) tribedoesnotexist
 *
 * @apiSuccess (200) valid
 * {object} data contains indexfile requested
 *
 */
router.get("/isauth", checkHeaders, isAuthenticated, (req, res) => {
  res.status(200).send({
    status: 200,
    ref: "headers",
    msg: "authenticated",
    data: {
      xalias: req.session.header.xalias,
      xprofils: req.session.header.xprofils,
    },
  });
});
//  @a    pi  Body {object} schema:pagans <a href='/nationchains/schema/pagans.json' target='_blank'>/nationchains/schema/pagans.json</a>
 
/**
 * @api {post} adminapi/pagans  - pagan Post
 * @apiName addpagan
 * @apiGroup Pagans
 * @apiDescription
 *  Create a pagan account from alias, publickey, if trusted recovery =>
 *  If trustedtribe is true then create a person in xtribe/person/xalias.json with profil.auth={email,privatekey, passphrase}.
 * 
 *  Middleware isAuthenticated check that:
 *  - xhash is well signed from private key linked to the publickey of alias
 *  - check that alias does not already exist (if yes then verifiedsigne would be false)
 * Need to wait next block chain to be sure that alias is register in the blokchain
 * @apiBody {string} alias available (that does not already exist check get /api/alias/:alias that must return 404).
 * @apiBody {string} publickey  
 * @apiBody {string} [email] if specified then an email is sent to it with public and privatekey
 * @apiBody {string} [privatekey]
 * @apiBody {string} [passphrase] if not specidied => passphrase=""
 * @apiBody {string} [trustedtribe] the tribename  if not specified then the process will only create a pagan identity, else an item person is create for trustedtribe (that must exist with profil 'person'). To create a person with an existing pagan identity use put /api/person/:alias after authenticated you (headers). In case a person is created then we use all valid other apiBody respecting the persons schema (see put persons)
 * 
 * @apiError {json} objectNotfound the file does not exist 
 * @apiErrorExample {json}
 * HTTP/1.1 404 Not Found
   {"status":404,"ref":"Odmdb","msg":"pathnamedoesnotexist","data":{indexpath}}
 *
 * @apiSuccess {object}  indexfile content
 * @apiSuccessExample {json} Success-Response:
 * HTTP/1.1 200 OK
 * {"status":200, "ref":"Odmdb", "msg":"indexexist", "data":{indexname,content:{index file}}
 * 
 */
router.post("/", checkHeaders, isAuthenticated, async (req, res) => {
  if (log) console.log(currentmod,"post with", req.body);
  const role = {
    xalias: req.session.header.xalias,
    xprofils: req.session.header.xprofils,
  };
  const emailregex =
  /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
  if (!(req.body.trustedtribe && req.body.email && emailregex.test(req.body.email) )) {
   res.status(400).json({status:400,ref:"Pagans",msg:"emailerr", data:{email:req.body.email}})
   return
  }
  const objpagan = { alias: req.body.alias, publickey: req.body.publickey };
  console.log(path.resolve(`../objects/pagans`))
  const newpagan = Odmdb.cud(`../objects/pagans`, "C", objpagan, role);
  const createprocess={status:200, ref:"Pagans", msg:"successfulcreate",data:{alias:req.body.alias}};
  if (newpagan.status == 200) {
    if (req.body.email) {
      const emailsent = await Pagans.sendmailkey({
       alias: req.body.alias,
       privatekey: req.body.privatekey,
       tribe: req.session.header.xtribe,
       passprhase: req.body.passphrase,
       publickey: req.body.publickey,
       email: req.body.email,
       lg: req.session.header.xlang
      }
      );
      createprocess.data.emailsent = (emailsent.status == 200);
      createprocess.data.email=req.body.email
      createprocess.data.tribe=req.session.header.xtribe;
      if (emailsent.status!=200) {
        console.log("pagans err to send email emailsent: ",emailsent)
        createprocess.data.emailerror = emailsent.data.err;
      }
    }
    if (req.body.trustedtribe) {
      const persondata = {
        alias: req.body.alias,
        owner: req.body.alias,
        profils: ["pagans", "persons"],
        recoveryauth: {
          email: req.body.email,
          privatekey: req.body.privatekey,
          publickey: req.body.publickey,
          passphrase: req.body.passphrase,
        },
      };
      const personup = Odmdb.cud(`../../${req.body.trustedtribe}/objects/persons`, "C", persondata, {xprofils:["pagan"],xalias:req.body.alias}); 
      if (log) console.log(currentmod,'person create',personup)
      if (personup.status==200){
        createprocess.data.createperson=true;
      }else{
        createprocess.data.createperson=false;
        createprocess.data.errorperson=true;
        createprocess.data.errpersonup=personup.data;
        if (log) console.log(currentmod,"Warning pagan created but person not created and no recovery registration", personup);
      }
      res.status(createprocess.status).json(createprocess);
    }else{
      res.status(newpagan.status).json(newpagan);
    }
  } else {
    //error to create pagan certaily already exist
    res.status(newpagan.status).json(newpagan);
  }
});
/**
 * @api {delete} adminapi/pagans/alias/:alias - pagan Delete
 * @apiName deletepagan
 * @apiGroup Pagans
 * @apiDescription
 *  Delete an alias and his publickey, this mean that publickey disapear as well as alias. We set dt_delete
 * */
router.delete("/alias/:alias", checkHeaders, isAuthenticated, (req, res) => {
  const personpath=`../objects/pagans`;
  const role = {
    xalias: req.session.header.xalias,
    xprofils: req.session.header.xprofils,
  };
  req.session.header.role
  const delperson = Odmdb.cud(personpath,"U",{alias:req.params.alias,dt_delete:dayjs().toISOString()},role,true);
  if (log) console.log(currentmod,`DELETE person ${personpath}/${req.params.alias}.json `);
  if (log) console.log(delperson)
  res.status(delperson.status).json(delperson);

  if (log) console.log(`DELETE pagans adminapi/objects/pagans/${req.params.alias}.json`);
  const result = Pagans.delete(req.params.alias, req.session.header);
  res.status(result.status).send(result);
});
/**
 * @api {delete} adminapi/pagans/person/:tribe/:alias - person Delete
 * @apiName deleteperson
 * @apiGroup Pagans
 * @apiDescription
 *  Unsubscribe a person to a tribe => remove a person item and all data link to this alias. An asynchrone process turn each day to clean data in tribe, if a persons does not exist anymore in the tribe. Pagans alias is still existing as it is autonomous. It is possible to delete pagans see "pagan Delete".
 * @apiHeader {array} xprofils list of profil of authenticated user
 * @apiHeader {string} xalias current user
 * @apiParam  {string} tribe where person alias exist
 * @apiParam   {string} alias to delete as person
 * */
router.delete("/person/:tribe/:alias", checkHeaders, isAuthenticated, (req, res) => {
  const personpath=`../../${req.params.tribe}/objects/persons`;
  const role = {
    xalias: req.session.header.xalias,
    xprofils: req.session.header.xprofils,
  };
  req.session.header.role
  const delperson = Odmdb.cud(personpath,"D",{alias:req.params.alias},role,true);
  if (log) console.log(currentmod,`DELETE person ${personpath}/${req.params.alias}.json `);
  if (log) console.log(currentmod,"delete person ",delperson)
  res.status(delperson.status).json(delperson);
});

/**
 * @api {get} adminapi/pagans/person/:alias - person Get
 * @apiName getpersondata
 * @apiDescription Get person information from his alias for a xtribe (data and profils per apps)
 * @apiGroup Pagans
 *
 * @apiParam {string} alias
 *
 * @apiSuccess (200) personExist
 * @apiSuccessExample {json}
 * {status:200, ref:"pagans",msg:"personexist",data: { person } }
 *
 * @apiError (404) Notfound
 * @apiErrorExample {json}
 *  {status: 404, ref:"pagans",msg:"persondoesnotexist",data: { person } }
 *
 * @todo check accessright  for req.session.header.xalias to see if jhe can get person data
 * if req.param.alias ==  req.session.header.xalias  => Owner
 * else need accessright to on person  set at R
 * */
router.get("/person/:alias", checkHeaders, isAuthenticated, (req, res) => {
  console.log(path.resolve(`../../${req.session.header.xtribe}/objects/persons`))
  const getperson=Odmdb.r( `../../${req.session.header.xtribe}/objects/persons`,req.params.alias,{ xprofils: req.session.header.xprofils, xalias: req.session.header.xalias })
  res.status(getperson.status).send(getperson);
});

/**
 * @api {put} adminapi/pagans/person/:tribe - person Put
 * @apiName updateperson
 * @apiGroup Pagans
 * @apiDescription add or update a person = alias in tribe. xalias authenticated (in header) must have a profil with accessright into schema person to create a person.
 * @apiHeader {string} xhash authenthicate hash with current user keys
 * @apiHeader {string} xalias current user
 * @apiHeader {string} xprofils profil list
 * @apiParam {object} schema:persons <a href='https://smatchit.io/smatchit/schema/persons.json' target='_blank'>https://dnstribe/tribe/schema/persons.json</a>
 * 
 */
router.put("/person/:tribe", checkHeaders, isAuthenticated, (req, res) => {
  //console.log(req.body);
  const pathobj=`../../${req.params.tribe}/objects/persons`;
  const action = (fs.existsSync(`${pathobj}/itm/${req.body.alias}.json`))? "U":"C";
  //set req.body to be in line with schema
  if (!req.body.profils){
    req.body.profils=["anonymous","pagans","persons"]
  }
  const personup = Odmdb.cud(pathobj, action, req.body, {xprofils:req.session.header.xprofils, xalias:req.session.header.xalias}); 
  if (log) console.log(currentmod,' personupdate or create:',personup)
  res.status(personup.status).json(personup);
});

/**
 * @api {post} adminapi/pagans/keyrecovery - recovery keys
 * @apiName  recoveryKey
 * @apiGroup Pagans
 * @apiDescription Send mails with all registers identities (one per alias where recoveryauth.email is register). Search can be request by email or by alias for a tribe. It is looking for in person.recoveryauth.email to send keys. One mail is sent by alias. So if n alias has the same recoveryaut.email then it will send n email.
 * @apiBody {string} emailalias type of search (email or alias)
 * @apiBody {string} tribe tribename into looking for
 * @apiBody {string} search an email or an alias
 *   
 * @apiSuccess {object}  send recovery email
 * @apiSuccessExample {json} Success-Response:
 * HTTP/1.1 200 OK
 * {"status":200, "ref":"Pagans", "msg":"recoveryemailsent", "data":{email,tribe,numberemailsent'}}
 * 
 * @apiError (404) {string} recoveryemailnotfound email does not exist for this tribe
 * @apiErrorExample {json} 
 *  {status: 404, ref:"pagans",msg:"recoveryemailnotfound",data: { tribe,email } }
 *
 */
router.post("/keyrecovery", checkHeaders, (req, res) => {
  let emailist=[]
  let alias =req.body.search;
  if (req.body.emailalias=="email"){
    req.body.search=req.body.search.toLowerCase();
    const idxreco=`../../${req.body.tribe}/objects/persons/idx/emailrecovery_alias.json`;
    if (fs.existsSync(idxreco)){
      const emailreco = fs.readJSONSync(idxreco);
      const listalias = (emailreco[req.body.search])? emailreco[req.body.search]: []; 
      listalias.forEach(a=>{
          emailist.push({alias:a,tribe:req.body.tribe,lg:req.session.header.xlang})
      })
    }
  }else if (req.body.emailalias=="alias"){
    const falias= `../../${req.body.tribe}/objects/persons/itm/${req.body.search}.json`;
    if (fs.existsSync(falias)){
      emailist.push({alias:req.body.search,tribe:req.body.tribe,lg:req.session.header.xlang})
    }
  }else{
    //console later
  }
  
  emailist.forEach(e => {
    console.log(e)
    const ret= Pagans.sendmailkey(e)
  })

  if (emailist.length>0) {
    res.status(200).json({status:200,ref:"Pagans",msg:"recoveryemailsent",data:{numberemailsent:emailist.length}});
  }else{
    res.status(404).json({status:404,ref:"Pagans",msg:"recoveryemailnotfound",data:{tribe:req.body.tribe}});
  }
});

module.exports = router;