var User = require("./user");
var DataSavable = require("./SavableData");
var E = require("./Errors");
var utils = require('./utils');
var global = require("./global");
var fs = require("fs");



module.exports = class UserManager extends DataSavable{
  constructor()
  {
    super();
    utils.mkdir(global.userPath);
    this.index=0;
    this.users={}; // id: name
    this.path = "data/users.json";
    this.load();
  }

  createUser(name, password)
  {
    console.log("createUser('"+name+"', '"+password+"')")
    if(this.findIdByName(name)>=0) return -1;
    var u = new User( name, password);
    this.users[this.index]=name;
    this.index++;
    utils.mkdir(global.pathToUserDir(name));
    u.save();
    this.save();
    return u;
  }

  removeUser(name)
  {
    var user = this.getUser(name);
    if(!E.check(user))
      return user;

    var id = this.findIdByName(name);
    delete this.users[id];
    console.log("-- "+global.pathToUserDir(name)+" --")
    utils.rmdir(global.pathToUserDir(name));

    this.save();
    return E.SUCCESS;
  }

  renameUser(oldName, newName)
  {


    var oldPath = global.pathToUserDir(oldName);
    var newPath = global.pathToUserDir(newName);

    console.log(oldPath+" -> "+newPath);
    try {
      utils.mv(oldPath, newPath);
    } catch (e) {
      return E.UNKNWON;
    } finally {
    }

    var id = this.findIdByName(oldName);
    this.users[id]=newName;
    this.save();


    var user = this.getUser(newName);
    if(!E.check(user))
      return user;

    user.name=newName;
    user.save();
    return E.SUCCESS;
  }

  editUser(name, data)
  {

    console.log("\n\n'"+data.name+"' "+"'"+name+"'")
    if(data.name!=undefined && data.name!=name)
    {
      var t = this.renameUser(name, data.name);
      if( !E.check(t) )
        return t;
      this.save();
      name=data.name;
    }

    var user = this.getUser(name);
    if(!E.check(user))
      return user;

            console.log("\n\ndata: "+JSON.stringify(data));
                  console.log("avant: "+JSON.stringify(user));
    Object.assign(user, data);
          console.log("apres: "+JSON.stringify(user));
    user.save();
    return E.SUCCESS;
  }




  findIdByName(name)
  {
    var keys = Object.keys(this.users);
    for(var i=0; i<keys.length; i++)
      if(this.users[keys[i]]==name)
        return keys[i];
    return -1;
  }

  getUser(name)
  {
    var id = this.findIdByName(name);
    if(id<0) return E.BAD_USER;
    var user = new User();
    return user.load(name);
  }

  getUserList()
  {
    return  Object.values(this.users);
  }


}