import './shortcuts.css';

import { MenuDivider } from '@szhsin/react-menu';
import { memo } from 'preact/compat';
import { useRef, useState } from 'preact/hooks';
import { useHotkeys } from 'react-hotkeys-hook';
import { useNavigate } from 'react-router-dom';
import { useSnapshot } from 'valtio';

import { SHORTCUTS_META } from '../components/shortcuts-settings';
import { api } from '../utils/api';
import { getLists } from '../utils/lists';
import states from '../utils/states';

import AsyncText from './AsyncText';
import Icon from './icon';
import Link from './link';
import Menu2 from './menu2';
import MenuLink from './menu-link';
import SubMenu2 from './submenu2';

function Shortcuts() {
  const { instance } = api();
  const snapStates = useSnapshot(states);
  const { shortcuts, settings } = snapStates;

  if (!shortcuts.length) {
    return null;
  }
  if (
    settings.shortcutsViewMode === 'multi-column' ||
    (!settings.shortcutsViewMode && settings.shortcutsColumnsMode)
  ) {
    return null;
  }

  const menuRef = useRef();

  const hasLists = useRef(false);
  const formattedShortcuts = shortcuts
    .map((pin, i) => {
      const { type, ...data } = pin;
      if (!SHORTCUTS_META[type]) return null;
      let { id, path, title, subtitle, icon } = SHORTCUTS_META[type];

      if (typeof id === 'function') {
        id = id(data, i);
      }
      if (typeof path === 'function') {
        path = path(
          {
            ...data,
            instance: data.instance || instance,
          },
          i,
        );
      }
      if (typeof title === 'function') {
        title = title(data, i);
      }
      if (typeof subtitle === 'function') {
        subtitle = subtitle(data, i);
      }
      if (typeof icon === 'function') {
        icon = icon(data, i);
      }

      if (id === 'lists') {
        hasLists.current = true;
      }

      return {
        id,
        path,
        title,
        subtitle,
        icon,
      };
    })
    .filter(Boolean);

  const navigate = useNavigate();
  useHotkeys(['1', '2', '3', '4', '5', '6', '7', '8', '9'], (e, handler) => {
    const index = parseInt(handler.keys[0], 10) - 1;
    if (index < formattedShortcuts.length) {
      const { path } = formattedShortcuts[index];
      if (path) {
        navigate(path);
        menuRef.current?.closeMenu?.();
      }
    }
  });

  const [lists, setLists] = useState([]);

  return (
    <div id="shortcuts">
      {snapStates.settings.shortcutsViewMode === 'tab-menu-bar' ? (
        <nav
          class="tab-bar"
          onContextMenu={(e) => {
            e.preventDefault();
            states.showShortcutsSettings = true;
          }}
        >
          <ul>
            {formattedShortcuts.map(
              ({ id, path, title, subtitle, icon }, i) => {
                return (
                  <li key={`${i}-${id}-${title}-${subtitle}-${path}`}>
                    <Link
                      class={subtitle ? 'has-subtitle' : ''}
                      to={path}
                      onClick={(e) => {
                        if (e.target.classList.contains('is-active')) {
                          e.preventDefault();
                          const page = document.getElementById(`${id}-page`);
                          console.log(id, page);
                          if (page) {
                            page.scrollTop = 0;
                            const updatesButton =
                              page.querySelector('.updates-button');
                            if (updatesButton) {
                              updatesButton.click();
                            }
                          }
                        }
                      }}
                    >
                      <Icon icon={icon} size="xl" alt={title} />
                      <span>
                        <AsyncText>{title}</AsyncText>
                        {subtitle && (
                          <>
                            <br />
                            <small>{subtitle}</small>
                          </>
                        )}
                      </span>
                    </Link>
                  </li>
                );
              },
            )}
          </ul>
        </nav>
      ) : (
        <Menu2
          instanceRef={menuRef}
          overflow="auto"
          viewScroll="close"
          menuClassName="glass-menu shortcuts-menu"
          gap={8}
          position="anchor"
          onMenuChange={(e) => {
            if (e.open && hasLists.current) {
              getLists().then(setLists);
            }
          }}
          menuButton={
            <button
              type="button"
              id="shortcuts-button"
              class="plain"
              onContextMenu={(e) => {
                e.preventDefault();
                states.showShortcutsSettings = true;
              }}
              onTransitionStart={(e) => {
                // Close menu if the button disappears
                try {
                  const { target } = e;
                  if (getComputedStyle(target).pointerEvents === 'none') {
                    menuRef.current?.closeMenu?.();
                  }
                } catch (e) {}
              }}
            >
              <Icon icon="shortcut" size="xl" alt="Shortcuts" />
            </button>
          }
        >
          {formattedShortcuts.map(({ id, path, title, subtitle, icon }, i) => {
            if (id === 'lists') {
              return (
                <SubMenu2
                  menuClassName="glass-menu"
                  overflow="auto"
                  gap={-8}
                  label={
                    <>
                      <Icon icon={icon} size="l" />
                      <span class="menu-grow">
                        <AsyncText>{title}</AsyncText>
                      </span>
                      <Icon icon="chevron-right" />
                    </>
                  }
                >
                  <MenuLink to="/l">
                    <span>All Lists</span>
                  </MenuLink>
                  <MenuDivider />
                  {lists?.map((list) => (
                    <MenuLink key={list.id} to={`/l/${list.id}`}>
                      <span>{list.title}</span>
                    </MenuLink>
                  ))}
                </SubMenu2>
              );
            }

            return (
              <MenuLink
                to={path}
                key={`${i}-${id}-${title}-${subtitle}-${path}`}
                class="glass-menu-item"
              >
                <Icon icon={icon} size="l" />{' '}
                <span class="menu-grow">
                  <span>
                    <AsyncText>{title}</AsyncText>
                  </span>
                  {subtitle && (
                    <>
                      {' '}
                      <small class="more-insignificant">{subtitle}</small>
                    </>
                  )}
                </span>
                <span class="menu-shortcut hide-until-focus-visible">
                  {i + 1}
                </span>
              </MenuLink>
            );
          })}
        </Menu2>
      )}
    </div>
  );
}

export default memo(Shortcuts);