import { Component } from '../../../lib/vues6/vues6.js'
import { location_service } from '../../service/Location.service.js'
import { auth_api } from '../../service/AuthApi.service.js'

const template = `
<div class="coreid-login-form col-lg-6 col-md-8 col-sm-10 col-xs-12 offset-lg-3 offset-md-2 offset-sm-1 offset-xs-0 text-left">
    <div class="coreid-login-form-inner">
        <div class="coreid-login-form-header font-weight-light">{{ app_name }}</div>
        <div class="coreid-login-form-message">{{ message }}</div>
        <form class="coreid-form" v-on:submit.prevent="do_nothing">
            <div class="form-group">
                <input
                    v-if="step === 1"
                    type="text"
                    id="coreid-registration-form-first"
                    name="first_name"
                    class="form-control"
                    placeholder="First Name"
                    v-model="first_name"
                    autofocus
                    @keyup="on_key_up"
                    :disabled="loading || step > 1"
                >
            </div>
            <div class="form-group">
                <input
                    v-if="step === 1"
                    type="text"
                    id="coreid-registration-form-last"
                    name="last_name"
                    class="form-control"
                    placeholder="Last Name"
                    v-model="last_name"
                    autofocus
                    @keyup="on_key_up"
                    :disabled="loading || step > 1"
                >
            </div>
            <div class="form-group">
                <input
                    v-if="step === 2 || step === 3"
                    type="text"
                    id="coreid-registration-form-username"
                    name="username"
                    class="form-control"
                    placeholder="Username"
                    v-model="username"
                    autofocus
                    @keyup="on_key_up"
                    :disabled="loading || step != 2"
                    ref="input_username"
                >
            </div>
            <div class="form-group">
                <input
                    v-if="step === 3"
                    type="email"
                    id="coreid-registration-form-email"
                    name="email"
                    class="form-control"
                    placeholder="E-Mail"
                    v-model="email"
                    autofocus
                    @keyup="on_key_up"
                    :disabled="loading || step != 3"
                    ref="input_email"
                >
            </div>
            <div v-if="error_message" class="error-message">{{ error_message }}</div>
            <div v-if="other_message" class="other-message">{{ other_message }}</div>
            <div class="buttons text-right">
                <small
                    class="mr-3"
                    v-if="step === 1 && !loading"
                ><a href="#" class="text-secondary" @click="on_login_click">Already have an account?</a></small>
                <button
                    type="button"
                    class="btn btn-primary"
                    :disabled="loading"
                    v-if="step > 1"
                    v-on:click="back_click"
                >Back</button>  
                <button
                    type="button"
                    class="btn btn-primary"
                    :disabled="loading || btn_disabled"
                    v-on:click="step_click"
                >{{ button_text }}</button>  
            </div>
        </form>
        <div class="coreid-loading-spinner" v-if="loading"><div class="inner"></div></div>
    </div>
</div>
`
// Required: First Name, Last Name, Username, E-Mail, Password (Confirm)
export default class RegistrationFormComponent extends Component {
    static get selector() { return 'coreid-registration-form' }
    static get template() { return template }
    static get props() { return ['app_name'] }

    loading = false
    step = 1
    other_message = ''
    error_message = ''
    message = ''
    btn_disabled = true
    button_text = 'Continue'

    first_name = ''
    last_name = ''
    username = ''
    email = ''

    async vue_on_create() {
        this.message = 'Create an account to continue:'
    }

    async step_click() {
        this.loading = true
        this.error_message = ''
        this.other_message = ''
        if ( this.step === 1 ) {
            if ( !this.first_name.trim() || !this.last_name.trim() ) {
                this.error_message = 'Please provide your first and last name.'
                this.loading = false
                return
            }

            this.message = `Hi, ${this.first_name.trim()}. Now, you need to choose a username:`
            this.$nextTick(() => {
                this.$refs.input_username.focus()
            })
        } else if ( this.step === 2 ) {
            if ( await auth_api.username_taken(this.username) ) {
                this.error_message = 'That username is already taken.'
                this.loading = false
                return
            }

            this.$nextTick(function() {
                this.$nextTick(() => {
                    this.$refs.input_email.focus()
                })
            })
        } else if ( this.step === 3 ) {
            if ( !(await auth_api.validate_email(this.email)) ) {
                this.error_message = 'Please provide a valid e-mail address.'
                this.loading = false
                return
            }

            if ( await auth_api.email_taken(this.email) ) {
                this.error_message = 'That e-mail address is already taken.'
                this.loading = false
                return
            }

            try {
                const user = await auth_api.register_user({
                    first_name: this.first_name,
                    last_name: this.last_name,
                    uid: this.username,
                    email: this.email,
                })

                if ( !user ) this.error_message = 'Sorry, an unknown error has occurred and we are unable to continue at this time.'
                else this.other_message = 'Welcome! Let\'s get your password set up...'
                this.btn_disabled = true
                return location_service.redirect('/dash', 2000)
            } catch (e) {
                this.error_message = e.message || 'Sorry, an unknown error has occurred and we are unable to continue at this time.'
                this.loading = false
                return
            }
        }

        if ( this.step < 3 ) this.step += 1
        this.loading = false
        this.btn_disabled = true
    }

    async back_click() {
        this.error_message = ''
        this.other_message = ''
        this.step -= 1
        this.on_key_up()

        if ( this.step === 1 ) {
            this.message = 'Create an account to continue:'
        }
    }

    on_key_up(event) {
        if ( this.step === 1 ) {
            this.btn_disabled = !(this.first_name.trim() && this.last_name.trim())
        } else if ( this.step === 2 ) {
            this.btn_disabled = !this.username.trim() || !this.username.match(/^([A-Z]|[a-z]|[0-9]|_|-|\.)+$/)
        } else if ( this.step === 3 ) {
            this.btn_disabled = !this.email.trim()
        }

        if ( event.keyCode === 13 ) {
            // Enter was pressed
            event.preventDefault()
            event.stopPropagation()
            if ( !this.btn_disabled ) return this.step_click()
        }
    }

    on_login_click() {
        this.loading = true
        this.other_message = 'Okay! We\'ll have you login instead...'
        location_service.redirect('/auth/login', 1500)
    }

    do_nothing() {}
}