// Logic to login, or create / update a user (and also logout)
<template lang="pug">
div
  input#modalUser.modal(type="checkbox" @change="trySetEnterTime")
  div(role="dialog")
    .card
      label.modal-close(for="modalUser")
      h3 {{ stage }}
      form#userForm(@submit.prevent="onSubmit()")
        div(v-show="stage!='Login'")
          fieldset
            label(for="username") Name
            input#username(type="text" v-model="user.name")
          fieldset
            <label for="useremail">Email</label>
            <input id="useremail" type="email" v-model="user.email"/>
          fieldset
            <label for="notifyNew">Notify new moves &amp; games</label>
            <input id="notifyNew" type="checkbox" v-model="user.notify"/>
        div(v-show="stage=='Login'")
          fieldset
            <label for="nameOrEmail">Name or Email</label>
            <input id="nameOrEmail" type="text" v-model="nameOrEmail"/>
      .button-group
        button#submit(@click="onSubmit()")
          span {{ submitMessage }}
          i.material-icons send
        button(v-if="stage!='Update'" @click="toggleStage()")
          span {{ stage=="Login" ? "Register" : "Login" }}
        button(v-if="stage=='Update'" onClick="location.replace('/logout')")
          span Logout
      #dialog(:style="{display: displayInfo}") {{ infoMsg }}
</template>

<script>
import { store } from "@/store";
export default {
  name: 'my-upsert-user',
	data: function() {
		return {
			user: store.state.user, //initialized with global user object
			nameOrEmail: "", //for login
			stage: (!store.state.user.id ? "Login" : "Update"),
			infoMsg: "",
			enterTime: Number.MAX_SAFE_INTEGER, //for a basic anti-bot strategy
		};
	},
	computed: {
		submitMessage: function() {
			switch (this.stage)
			{
				case "Login":
					return "Go";
				case "Register":
					return "Send";
				case "Update":
					return "Apply";
			}
		},
		displayInfo: function() {
			return (this.infoMsg.length > 0 ? "block" : "none");
		},
	},
	methods: {
		trySetEnterTime: function(event) {
			if (!!event.target.checked)
				this.enterTime = Date.now();
		},
		toggleStage: function() {
			// Loop login <--> register (update is for logged-in users)
			this.stage = (this.stage == "Login" ? "Register" : "Login");
		},
		ajaxUrl: function() {
			switch (this.stage)
			{
				case "Login":
					return "/sendtoken";
				case "Register":
					return "/register";
				case "Update":
					return "/update";
			}
		},
		ajaxMethod: function() {
			switch (this.stage)
			{
				case "Login":
					return "GET";
				case "Register":
					return "POST";
				case "Update":
					return "PUT";
			}
		},
		infoMessage: function() {
			switch (this.stage)
			{
				case "Login":
					return "Connection token sent. Check your emails!";
				case "Register":
					return "Registration complete! Please check your emails.";
				case "Update":
					return "Modifications applied!";
			}
		},
		onSubmit: function() {
			// Basic anti-bot strategy:
			const exitTime = Date.now();
			if (this.stage == "Register" && exitTime - this.enterTime < 5000)
				return; //silently return, in (curious) case of it was legitimate
			let error = undefined;
			if (this.stage == 'Login')
			{
				const type = (this.nameOrEmail.indexOf('@') >= 0 ? "email" : "name");
				error = checkNameEmail({[type]: this.nameOrEmail});
			}
			else
				error = checkNameEmail(this.user);
			if (!!error)
				return alert(error);
			this.infoMsg = "Processing... Please wait";
			ajax(this.ajaxUrl(), this.ajaxMethod(),
				this.stage == "Login" ? { nameOrEmail: this.nameOrEmail } : this.user,
				res => {
					this.infoMsg = this.infoMessage();
					if (this.stage != "Update")
					{
						this.nameOrEmail = "";
						this.user["email"] = "";
						this.user["name"] = "";
						// Store our identifiers in local storage (by little anticipation...)
						localStorage["myid"] = res.id;
						localStorage["myname"] = res.name;
            // Also in global object
            this.$user.id = res.id;
            this.$user.name = res.name;
					}
					setTimeout(() => {
						this.infoMsg = "";
						if (this.stage == "Register")
							this.stage = "Login";
						document.getElementById("modalUser").checked = false;
					}, 2000);
				},
				err => {
					this.infoMsg = "";
					alert(err);
				}
			);
		},
	},
};
</script>