import React, { useState } from "react";
import {
  FaInfoCircle,
  FaGithub,
  FaChevronDown,
  FaChevronUp,
} from "react-icons/fa";

/**
 * This is a preview bar that is enabled by default to handle viewing content in preview & live mode, remove this for production use.
 **/

const PreviewBar = ({ isPreview, isDevelopmentMode }) => {
  const [open, setOpen] = useState(false);

  // handle view function to determine preview / live mode
  const handleView = () => {
    if (isDevelopmentMode) {
      alert("You are currently in Development Mode, Live Mode is unavailable.");
    } else {
      if (!isDevelopmentMode && !isPreview) {
        const xhr = new XMLHttpRequest();

        xhr.onload = function () {
          // Process our return data
          if (xhr.status >= 200 && xhr.status < 300) {
            // What do when the request is successful
            const previewKey = xhr.responseText;

            window.location.replace(
              `${window.location.pathname}?agilitypreviewkey=${escape(
                previewKey
              )}`
            );
          }
        };
        // Create and send a GET request
        xhr.open("GET", "/api/generatePreviewKey");
        xhr.send();
      } else {
        const exit = confirm("Would you like to exit Preview Mode?");
        if (exit === true) {
          window.location.href = `/api/exitPreview?slug=${window.location.pathname}`;
        } else return;
      }
    }
  };

  return (
    <div className="bg-agility relative px-8 text-gray-200">
      <div className="flex justify-between items-center max-w-screen-xl mx-auto">
        <div className="flex items-center">
          <span className="p-2 rounded-lg mr-4">
            <a
              href="https://www.agilitycms.com"
              target="_blank"
              title="Agility CMS"
            >
              <img
                src="https://static.agilitycms.com/brand/agility-triangle-yellow.svg"
                alt="Agility CMS"
                className="w-5 h-5 block md:hidden"
              />
              <img
                src="/assets/agility-preview-logo.svg"
                alt="Agility CMS"
                className="h-5 w-20 hidden md:block"
              />
            </a>
          </span>
          <div className="mr-4">
            <a
              href="https://help.agilitycms.com/hc/en-us"
              target="_blank"
              title="Help Center"
            >
              <div className="flex items-center">
                <FaInfoCircle className="text-2xl mr-2" />
                <p className="hidden md:block text-sm">Help Center</p>
              </div>
            </a>
          </div>
          <div>
            <a
              href="https://github.com/agility/agilitycms-nextjs-starter"
              target="_blank"
              title="View on GitHub"
              className="text-2xl"
            >
              <div className="flex items-center">
                <FaGithub className="mr-2" />
                <p className="hidden md:block text-sm">View on GitHub</p>
              </div>
            </a>
          </div>
        </div>
        <div
          className={`relative flex items-center ${
            open ? `bg-white ` : `bg-agility`
          } py-4`}
        >
          {isPreview ? (
            <p
              className={`hidden md:block text-sm px-2 ${
                open ? `text-agility` : `text-gray-200`
              }`}
            >
              Previewing <span className="font-bold">Latest</span> Changes
            </p>
          ) : (
            <p
              className={`hidden md:block text-sm px-2 ${
                open ? `text-agility` : `text-gray-200`
              }`}
            >
              Viewing <span className="font-bold">Published</span> Content
            </p>
          )}
          <div
            className="p-2 text-gray-200 rounded-lg cursor-pointer z-50"
            onClick={() => setOpen(!open)}
          >
            {open ? (
              <FaChevronUp className="text-agility" />
            ) : (
              <FaChevronDown className="text-gray-200" />
            )}
          </div>
          <div
            className="absolute bg-white text-white text-sm py-4 px-4 -right-0 -bottom-28 md:-bottom-16 z-50 rounded-b-lg shadow-xl md:max-w-full"
            style={{ display: open ? "block" : "none", width: "15.1rem" }}
          >
            {isPreview ? (
              <p className="mb-4 text-center md:hidden text-agility z-20">
                Previewing <span className="font-bold">Latest</span> Changes
              </p>
            ) : (
              <p className="mb-4 text-center md:hidden text-agility z-20">
                Viewing <span className="font-bold">Published</span> Content
              </p>
            )}
            <button
              className="text-gray-200 bg-agility p-2 w-full rounded-md text-sm"
              onClick={() => handleView()}
            >
              {`View ${isPreview ? `Live` : `Preview`} Mode`}
            </button>
          </div>
        </div>
      </div>
    </div>
  );
};

export default PreviewBar;