<template>
    <DocSectionText v-bind="$attrs">
        <p><a href="https://vee-validate.logaretm.com/v4/">VeeValidate</a> is a popular library for handling forms in Vue.</p>
    </DocSectionText>
    <div class="card flex justify-content-center">
        <form @submit="onSubmit" class="flex flex-column gap-2">
            <CascadeSelect
                v-model="value"
                :class="{ 'p-invalid': errorMessage }"
                :options="countries"
                optionLabel="cname"
                optionGroupLabel="name"
                :optionGroupChildren="['states', 'cities']"
                style="min-width: 14rem"
                placeholder="Select a City"
                aria-describedby="cc-error"
            />
            <small id="cc-error" class="p-error">{{ errorMessage || '&nbsp;' }}</small>
            <Button type="submit" label="Submit" />
        </form>
    </div>
    <DocSectionCode :code="code" :dependencies="{ 'vee-validate': '4.8.2' }" />
</template>

<script>
import { useToast } from 'primevue/usetoast';
import { useField, useForm } from 'vee-validate';

export default {
    setup() {
        const { handleSubmit, resetForm } = useForm();
        const { value, errorMessage } = useField('value', validateField);
        const toast = useToast();

        function validateField(value) {
            if (!value) {
                return 'City is required.';
            }

            return true;
        }

        const onSubmit = handleSubmit((values) => {
            if (values.value) {
                toast.add({ severity: 'info', summary: 'Form Submitted', detail: values.value.cname, life: 3000 });
                resetForm();
            }
        });

        return { value, handleSubmit, onSubmit, errorMessage };
    },
    data() {
        return {
            selectedCity: null,
            countries: [
                {
                    name: 'Australia',
                    code: 'AU',
                    states: [
                        {
                            name: 'New South Wales',
                            cities: [
                                { cname: 'Sydney', code: 'A-SY' },
                                { cname: 'Newcastle', code: 'A-NE' },
                                { cname: 'Wollongong', code: 'A-WO' }
                            ]
                        },
                        {
                            name: 'Queensland',
                            cities: [
                                { cname: 'Brisbane', code: 'A-BR' },
                                { cname: 'Townsville', code: 'A-TO' }
                            ]
                        }
                    ]
                },
                {
                    name: 'Canada',
                    code: 'CA',
                    states: [
                        {
                            name: 'Quebec',
                            cities: [
                                { cname: 'Montreal', code: 'C-MO' },
                                { cname: 'Quebec City', code: 'C-QU' }
                            ]
                        },
                        {
                            name: 'Ontario',
                            cities: [
                                { cname: 'Ottawa', code: 'C-OT' },
                                { cname: 'Toronto', code: 'C-TO' }
                            ]
                        }
                    ]
                },
                {
                    name: 'United States',
                    code: 'US',
                    states: [
                        {
                            name: 'California',
                            cities: [
                                { cname: 'Los Angeles', code: 'US-LA' },
                                { cname: 'San Diego', code: 'US-SD' },
                                { cname: 'San Francisco', code: 'US-SF' }
                            ]
                        },
                        {
                            name: 'Florida',
                            cities: [
                                { cname: 'Jacksonville', code: 'US-JA' },
                                { cname: 'Miami', code: 'US-MI' },
                                { cname: 'Tampa', code: 'US-TA' },
                                { cname: 'Orlando', code: 'US-OR' }
                            ]
                        },
                        {
                            name: 'Texas',
                            cities: [
                                { cname: 'Austin', code: 'US-AU' },
                                { cname: 'Dallas', code: 'US-DA' },
                                { cname: 'Houston', code: 'US-HO' }
                            ]
                        }
                    ]
                }
            ],
            code: {
                basic: `
<template>
    <div class="card flex justify-content-center">
        <form @submit="onSubmit" class="flex flex-column gap-2">
            <CascadeSelect v-model="value" :class="{ 'p-invalid': errorMessage }" :options="countries" optionLabel="cname"
                optionGroupLabel="name" :optionGroupChildren="['states', 'cities']" style="min-width: 14rem" placeholder="Select a City" aria-describedby="cc-error" />
            <small class="p-error" id="cc-error">{{ errorMessage || '&nbsp;' }}</small>
            <Button type="submit" label="Submit" />
        </form>
        <Toast />
    </div>
</template>`,
                options: `
<template>
    <div class="card flex justify-content-center">
        <form @submit="onSubmit" class="flex flex-column gap-2">
            <CascadeSelect v-model="value" :class="{ 'p-invalid': errorMessage }" :options="countries" optionLabel="cname"
                optionGroupLabel="name" :optionGroupChildren="['states', 'cities']" style="min-width: 14rem" placeholder="Select a City" aria-describedby="cc-error" />
            <small class="p-error" id="cc-error">{{ errorMessage || '&nbsp;' }}</small>
            <Button type="submit" label="Submit" />
        </form>
        <Toast />
    </div>
</template>

<script>
import { useToast } from 'primevue/usetoast';
import { useField, useForm } from 'vee-validate';

export default {
    setup() {
        const { handleSubmit, resetForm } = useForm();
        const { value, errorMessage } = useField('value', validateField);
        const toast = useToast();

        function validateField(value) {
            if (!value) {
                return 'City is required.';
            }

            return true;
        }

        const onSubmit = handleSubmit((values) => {
            if (values.value) {
                toast.add({ severity: 'info', summary: 'Form Submitted', detail: values.value.cname, life: 3000 });
                resetForm();
            }
        });

        return { value, handleSubmit, onSubmit, errorMessage };
    },
    data() {
        return {
            selectedCity: null,
            countries: [
                {
                    name: 'Australia',
                    code: 'AU',
                    states: [
                        {
                            name: 'New South Wales',
                            cities: [
                                { cname: 'Sydney', code: 'A-SY' },
                                { cname: 'Newcastle', code: 'A-NE' },
                                { cname: 'Wollongong', code: 'A-WO' }
                            ]
                        },
                        {
                            name: 'Queensland',
                            cities: [
                                { cname: 'Brisbane', code: 'A-BR' },
                                { cname: 'Townsville', code: 'A-TO' }
                            ]
                        }
                    ]
                },
                {
                    name: 'Canada',
                    code: 'CA',
                    states: [
                        {
                            name: 'Quebec',
                            cities: [
                                { cname: 'Montreal', code: 'C-MO' },
                                { cname: 'Quebec City', code: 'C-QU' }
                            ]
                        },
                        {
                            name: 'Ontario',
                            cities: [
                                { cname: 'Ottawa', code: 'C-OT' },
                                { cname: 'Toronto', code: 'C-TO' }
                            ]
                        }
                    ]
                },
                {
                    name: 'United States',
                    code: 'US',
                    states: [
                        {
                            name: 'California',
                            cities: [
                                { cname: 'Los Angeles', code: 'US-LA' },
                                { cname: 'San Diego', code: 'US-SD' },
                                { cname: 'San Francisco', code: 'US-SF' }
                            ]
                        },
                        {
                            name: 'Florida',
                            cities: [
                                { cname: 'Jacksonville', code: 'US-JA' },
                                { cname: 'Miami', code: 'US-MI' },
                                { cname: 'Tampa', code: 'US-TA' },
                                { cname: 'Orlando', code: 'US-OR' }
                            ]
                        },
                        {
                            name: 'Texas',
                            cities: [
                                { cname: 'Austin', code: 'US-AU' },
                                { cname: 'Dallas', code: 'US-DA' },
                                { cname: 'Houston', code: 'US-HO' }
                            ]
                        }
                    ]
                }
            ]
        }
    }
};
<\/script>`,
                composition: `
<template>
    <div class="card flex justify-content-center">
        <form @submit="onSubmit" class="flex flex-column gap-2">
            <CascadeSelect v-model="value" :class="{ 'p-invalid': errorMessage }" :options="countries" optionLabel="cname"
                optionGroupLabel="name" :optionGroupChildren="['states', 'cities']" style="min-width: 14rem" placeholder="Select a City" aria-describedby="cc-error" />
            <small class="p-error" id="cc-error">{{ errorMessage || '&nbsp;' }}</small>
            <Button type="submit" label="Submit" />
        </form>
        <Toast />
    </div>
</template>

<script setup>
import { ref } from 'vue';
import { useToast } from 'primevue/usetoast';
import { useField, useForm } from 'vee-validate';

const { handleSubmit, resetForm } = useForm();
const { value, errorMessage } = useField('value', validateField);
const toast = useToast();
const selectedCity = ref();
const countries = ref([
    {
        name: 'Australia',
        code: 'AU',
        states: [
            {
                name: 'New South Wales',
                cities: [
                    { cname: 'Sydney', code: 'A-SY' },
                    { cname: 'Newcastle', code: 'A-NE' },
                    { cname: 'Wollongong', code: 'A-WO' }
                ]
            },
            {
                name: 'Queensland',
                cities: [
                    { cname: 'Brisbane', code: 'A-BR' },
                    { cname: 'Townsville', code: 'A-TO' }
                ]
            }
        ]
    },
    {
        name: 'Canada',
        code: 'CA',
        states: [
            {
                name: 'Quebec',
                cities: [
                    { cname: 'Montreal', code: 'C-MO' },
                    { cname: 'Quebec City', code: 'C-QU' }
                ]
            },
            {
                name: 'Ontario',
                cities: [
                    { cname: 'Ottawa', code: 'C-OT' },
                    { cname: 'Toronto', code: 'C-TO' }
                ]
            }
        ]
    },
    {
        name: 'United States',
        code: 'US',
        states: [
            {
                name: 'California',
                cities: [
                    { cname: 'Los Angeles', code: 'US-LA' },
                    { cname: 'San Diego', code: 'US-SD' },
                    { cname: 'San Francisco', code: 'US-SF' }
                ]
            },
            {
                name: 'Florida',
                cities: [
                    { cname: 'Jacksonville', code: 'US-JA' },
                    { cname: 'Miami', code: 'US-MI' },
                    { cname: 'Tampa', code: 'US-TA' },
                    { cname: 'Orlando', code: 'US-OR' }
                ]
            },
            {
                name: 'Texas',
                cities: [
                    { cname: 'Austin', code: 'US-AU' },
                    { cname: 'Dallas', code: 'US-DA' },
                    { cname: 'Houston', code: 'US-HO' }
                ]
            }
        ]
    }
]);

function validateField(value) {
    if (!value) {
        return 'City is required.';
    }

    return true;
}

const onSubmit = handleSubmit((values) => {
    if (values.value) {
        toast.add({ severity: 'info', summary: 'Form Submitted', detail: values.value.cname, life: 3000 });
        resetForm();
    }
});
<\/script>
`
            }
        };
    }
};
</script>
