<template>
    <component :is="computedContent"></component>
</template>

<script setup lang="ts">
import DOMPurify from "dompurify";
import { computed } from "vue";
import { ImportMetaExtras } from "../../../import-meta";
import SMImageGallery from "./SMImageGallery.vue";

const props = defineProps({
    html: {
        type: String,
        default: "",
        required: true,
    },
});

/**
 * Return the html as a component, relative links as router-link and sanitized.
 */
const computedContent = computed(() => {
    let html = "";

    // Sanitize HTML
    html = DOMPurify.sanitize(html);

    // Convert local links to router-links
    const regexHref = new RegExp(
        `<a ([^>]*?)href="${
            (import.meta as ImportMetaExtras).env.APP_URL
        }(.*?>.*?)</a>`,
        "ig"
    );
    html = props.html.replace(regexHref, '<router-link $1to="$2</router-link>');

    // Convert image galleries to SMImageGallery component
    const regexGallery =
        /<div.*?class="tinymce-gallery".*?>\s*((?:<div class="tinymce-gallery-item" style="background-image: url\('.*?'\);">.*?<\/div>\s*)*)<\/div>/gi;

    const matches = [...html.matchAll(regexGallery)];
    for (const match of matches) {
        const images = match[1]; // Extract the captured group from the match
        const imageSrcs = images
            .match(/style="background-image: url\('(.*?)'\)/gi)
            .map((m) => m.match(/background-image: url\('(.*?)'\)/i)[1]);
        const smImageGallery = `<SMImageGallery :images='${JSON.stringify(
            imageSrcs
        )}' />`;
        html = html.replace(images, smImageGallery);
    }

    // Update local images to use at most the large size
    const regexImg = new RegExp(
        `<img ([^>]*?)src="${
            (import.meta as ImportMetaExtras).env.APP_URL
        }/storage/([^"]*?)"`,
        "ig"
    );
    html = html.replace(
        regexImg,
        `<img $1src="${
            (import.meta as ImportMetaExtras).env.APP_URL
        }/storage/$2?size=large"`
    );

    return {
        template: `<div class="html">${html}</div>`,
        components: {
            SMImageGallery,
        },
    };
});
</script>
