import { DialogButton, Focusable, ModalRoot, PanelSection, showModal } from '@decky/ui';
import { lazy, useEffect, useMemo, useState } from 'react';
import { FaInfo, FaTimes } from 'react-icons/fa';

import { Announcement, getAnnouncements } from '../store';
import { useSetting } from '../utils/hooks/useSetting';

const SEVERITIES = {
  High: {
    color: '#bb1414',
    text: '#fff',
  },
  Medium: {
    color: '#bbbb14',
    text: '#fff',
  },
  Low: {
    color: '#1488bb',
    text: '#fff',
  },
};

const welcomeAnnouncement: Announcement = {
  id: 'welcomeAnnouncement',
  title: 'Welcome to Decky!',
  text: 'We hope you enjoy using Decky! If you have any questions or feedback, please let us know.',
  created: Date.now().toString(),
  updated: Date.now().toString(),
};

const welcomeAnnouncement2: Announcement = {
  id: 'welcomeAnnouncement2',
  title: 'Welcome to Decky 2!',
  text: '',
  created: Date.now().toString(),
  updated: Date.now().toString(),
};

export function AnnouncementsDisplay() {
  const [announcements, setAnnouncements] = useState<Announcement[]>([welcomeAnnouncement, welcomeAnnouncement2]);
  const [hiddenAnnouncementIds, setHiddenAnnouncementIds] = useSetting<string[]>('hiddenAnnouncementIds', []);

  function addAnnouncements(newAnnouncements: Announcement[]) {
    // Removes any duplicates and sorts by created date
    setAnnouncements((oldAnnouncements) => {
      const newArr = [...oldAnnouncements, ...newAnnouncements];
      const setOfIds = new Set(newArr.map((a) => a.id));
      return (
        (
          Array.from(setOfIds)
            .map((id) => newArr.find((a) => a.id === id))
            // Typescript doesn't type filter(Boolean) correctly, so I have to assert this
            .filter(Boolean) as Announcement[]
        ).sort((a, b) => {
          return new Date(b.created).getTime() - new Date(a.created).getTime();
        })
      );
    });
  }

  async function fetchAnnouncement() {
    const announcements = await getAnnouncements();
    announcements && addAnnouncements(announcements);
  }

  useEffect(() => {
    void fetchAnnouncement();
  }, []);

  const currentlyDisplayingAnnouncements: Announcement[] = useMemo(() => {
    return announcements.filter((announcement) => !hiddenAnnouncementIds.includes(announcement.id));
  }, [announcements, hiddenAnnouncementIds]);

  function hideAnnouncement(id: string) {
    setHiddenAnnouncementIds([...hiddenAnnouncementIds, id]);
    void fetchAnnouncement();
  }

  if (currentlyDisplayingAnnouncements.length === 0) {
    return null;
  }

  return (
    <PanelSection>
      {currentlyDisplayingAnnouncements.map((announcement) => (
        <Announcement
          key={announcement.id}
          announcement={announcement}
          onHide={() => hideAnnouncement(announcement.id)}
        />
      ))}
    </PanelSection>
  );
}

function Announcement({ announcement, onHide }: { announcement: Announcement; onHide: () => void }) {
  // Severity is not implemented in the API currently
  const severity = SEVERITIES['Low'];
  return (
    <Focusable
      style={{
        // Transparency is 20% of the color
        backgroundColor: `${severity.color}33`,
        color: severity.text,
        borderColor: severity.color,
        borderWidth: '2px',
        borderStyle: 'solid',
        padding: '0.7rem',
        display: 'flex',
        flexDirection: 'column',
        position: 'relative',
      }}
    >
      <div style={{ display: 'flex', justifyContent: 'space-between' }}>
        <span style={{ fontWeight: 'bold' }}>{announcement.title}</span>
        <DialogButton
          style={{
            width: '1rem',
            minWidth: '1rem',
            height: '1rem',
            padding: '0',
            display: 'flex',
            alignItems: 'center',
            justifyContent: 'center',
          }}
          onClick={() =>
            showModal(
              <AnnouncementModal
                announcement={announcement}
                onHide={() => {
                  console.log('On Hide');
                }}
              />,
            )
          }
        >
          <FaInfo
            style={{
              height: '.75rem',
            }}
          />
        </DialogButton>
        <DialogButton
          style={{
            width: '1rem',
            minWidth: '1rem',
            height: '1rem',
            padding: '0',
            display: 'flex',
            alignItems: 'center',
            justifyContent: 'center',
          }}
          onClick={() => onHide()}
        >
          <FaTimes
            style={{
              height: '.75rem',
            }}
          />
        </DialogButton>
      </div>
    </Focusable>
  );
}

const MarkdownRenderer = lazy(() => import('./Markdown'));

function AnnouncementModal({
  announcement,
  closeModal,
  onHide,
}: {
  announcement: Announcement;
  closeModal?: () => void;
  onHide: () => void;
}) {
  return (
    <ModalRoot>
      <span>{announcement.title}</span>
      <MarkdownRenderer
        onDismiss={() => {
          console.log('Dismiss');
          closeModal?.();
        }}
      >
        {announcement.text}
      </MarkdownRenderer>
    </ModalRoot>
  );
}