import React, { useEffect } from "react";
import DOMPurify from "dompurify";
import "./styles.css";
import { executeEvent } from "../../utils/events";

const extractComponents = (url) => {
  if (!url || !url.startsWith("qortal://")) {
    // Check if url exists and starts with "qortal://"
    return null;
  }

  url = url.replace(/^(qortal\:\/\/)/, ""); // Safe to use replace now
  if (url.includes("/")) {
    let parts = url.split("/");
    const service = parts[0].toUpperCase();
    parts.shift();
    const name = parts[0];
    parts.shift();
    let identifier;
    const path = parts.join("/");
    return { service, name, identifier, path };
  }

  return null;
};

function processText(input) {
  const linkRegex = /(qortal:\/\/\S+)/g;
  function processNode(node) {
    if (node.nodeType === Node.TEXT_NODE) {
      const parts = node.textContent.split(linkRegex);
      if (parts.length > 0) {
        const fragment = document.createDocumentFragment();
        parts.forEach((part) => {
          if (part.startsWith("qortal://")) {
            const link = document.createElement("span");
            link.setAttribute("data-url", part);
            link.textContent = part;
            link.style.color = "var(--code-block-text-color)";
            link.style.textDecoration = "underline";
            link.style.cursor = "pointer";
            fragment.appendChild(link);
          } else {
            fragment.appendChild(document.createTextNode(part));
          }
        });
        node.replaceWith(fragment);
      }
    } else {
      Array.from(node.childNodes).forEach(processNode);
    }
  }

  const wrapper = document.createElement("div");
  wrapper.innerHTML = input;
  processNode(wrapper);
  return wrapper.innerHTML;
}

export const MessageDisplay = ({ htmlContent, isReply }) => {
  const linkify = (text) => {
    if (!text) return ""; // Return an empty string if text is null or undefined

    let textFormatted = text;
    const urlPattern = /(\bhttps?:\/\/[^\s<]+|\bwww\.[^\s<]+)/g;
    textFormatted = text.replace(urlPattern, (url) => {
      const href = url.startsWith("http") ? url : `https://${url}`;
      return `<a href="${DOMPurify.sanitize(
        href
      )}" class="auto-link">${DOMPurify.sanitize(url)}</a>`;
    });
    return processText(textFormatted);
  };

  const sanitizedContent = DOMPurify.sanitize(linkify(htmlContent), {
    ALLOWED_TAGS: [
      "a",
      "b",
      "i",
      "em",
      "strong",
      "p",
      "br",
      "div",
      "span",
      "img",
      "ul",
      "ol",
      "li",
      "h1",
      "h2",
      "h3",
      "h4",
      "h5",
      "h6",
      "blockquote",
      "code",
      "pre",
      "table",
      "thead",
      "tbody",
      "tr",
      "th",
      "td",
    ],
    ALLOWED_ATTR: [
      "href",
      "target",
      "rel",
      "class",
      "src",
      "alt",
      "title",
      "width",
      "height",
      "style",
      "align",
      "valign",
      "colspan",
      "rowspan",
      "border",
      "cellpadding",
      "cellspacing",
      "data-url",
    ],
  });

  const handleClick = async (e) => {
    e.preventDefault();

    const target = e.target;
    if (target.tagName === "A") {
      const href = target.getAttribute("href");
      if (chrome && chrome.tabs) {
        chrome.tabs.create({ url: href }, (tab) => {
          if (chrome.runtime.lastError) {
            console.error("Error opening tab:", chrome.runtime.lastError);
          } else {
            console.log("Tab opened successfully:", tab);
          }
        });
      }
    } else if (target.getAttribute("data-url")) {
      const url = target.getAttribute("data-url");
      const res = extractComponents(url);
      if (res) {
        const { service, name, identifier, path } = res;
        executeEvent("addTab", { data: { service, name, identifier, path } });
        executeEvent("open-apps-mode", {});
      }
    }
  };

  return (
    <div
      className={`tiptap ${isReply ? "isReply" : ""}`}
      dangerouslySetInnerHTML={{ __html: sanitizedContent }}
      onClick={handleClick}
    />
  );
};