import './drafts.css';

import { useEffect, useMemo, useReducer, useState } from 'react';

import { api } from '../utils/api';
import db from '../utils/db';
import niceDateTime from '../utils/nice-date-time';
import states from '../utils/states';
import { getCurrentAccountNS } from '../utils/store-utils';

import Icon from './icon';
import Loader from './loader';
import MenuConfirm from './menu-confirm';

function Drafts({ onClose }) {
  const { masto } = api();
  const [uiState, setUIState] = useState('default');
  const [drafts, setDrafts] = useState([]);
  const [reloadCount, reload] = useReducer((c) => c + 1, 0);

  useEffect(() => {
    setUIState('loading');
    (async () => {
      try {
        const keys = await db.drafts.keys();
        if (keys.length) {
          const ns = getCurrentAccountNS();
          const ownKeys = keys.filter((key) => key.startsWith(ns));
          if (ownKeys.length) {
            const drafts = await db.drafts.getMany(ownKeys);
            drafts.sort(
              (a, b) =>
                new Date(b.updatedAt).getTime() -
                new Date(a.updatedAt).getTime(),
            );
            setDrafts(drafts);
          } else {
            setDrafts([]);
          }
        } else {
          setDrafts([]);
        }
        setUIState('default');
      } catch (e) {
        console.error(e);
        setUIState('error');
      }
    })();
  }, [reloadCount]);

  const hasDrafts = drafts?.length > 0;

  return (
    <div class="sheet">
      {!!onClose && (
        <button type="button" class="sheet-close" onClick={onClose}>
          <Icon icon="x" />
        </button>
      )}
      <header>
        <h2>
          Unsent drafts <Loader abrupt hidden={uiState !== 'loading'} />
        </h2>
        {hasDrafts && (
          <div class="insignificant">
            Looks like you have unsent drafts. Let's continue where you left
            off.
          </div>
        )}
      </header>
      <main>
        {hasDrafts ? (
          <>
            <ul class="drafts-list">
              {drafts.map((draft) => {
                const { updatedAt, key, draftStatus, replyTo } = draft;
                const updatedAtDate = new Date(updatedAt);
                return (
                  <li key={updatedAt}>
                    <div class="mini-draft-meta">
                      <b>
                        <Icon icon={replyTo ? 'reply' : 'quill'} size="s" />{' '}
                        <time>
                          {!!replyTo && (
                            <>
                              @{replyTo.account.acct}
                              <br />
                            </>
                          )}
                          {niceDateTime(updatedAtDate)}
                        </time>
                      </b>
                      <MenuConfirm
                        confirmLabel={<span>Delete this draft?</span>}
                        menuItemClassName="danger"
                        align="end"
                        disabled={uiState === 'loading'}
                        onClick={() => {
                          (async () => {
                            try {
                              // const yes = confirm('Delete this draft?');
                              // if (yes) {
                              await db.drafts.del(key);
                              reload();
                              // }
                            } catch (e) {
                              alert('Error deleting draft! Please try again.');
                            }
                          })();
                        }}
                      >
                        <button
                          type="button"
                          class="small light"
                          disabled={uiState === 'loading'}
                        >
                          Delete&hellip;
                        </button>
                      </MenuConfirm>
                    </div>
                    <button
                      type="button"
                      disabled={uiState === 'loading'}
                      class="draft-item"
                      onClick={async () => {
                        // console.log({ draftStatus });
                        let replyToStatus;
                        if (replyTo) {
                          setUIState('loading');
                          try {
                            replyToStatus = await masto.v1.statuses.fetch(
                              replyTo.id,
                            );
                          } catch (e) {
                            console.error(e);
                            alert('Error fetching reply-to status!');
                            setUIState('default');
                            return;
                          }
                          setUIState('default');
                        }
                        window.__COMPOSE__ = {
                          draftStatus,
                          replyToStatus,
                        };
                        states.showCompose = true;
                        states.showDrafts = false;
                      }}
                    >
                      <MiniDraft draft={draft} />
                    </button>
                  </li>
                );
              })}
            </ul>
            {drafts.length > 1 && (
              <p>
                <MenuConfirm
                  confirmLabel={<span>Delete all drafts?</span>}
                  menuItemClassName="danger"
                  disabled={uiState === 'loading'}
                  onClick={() => {
                    (async () => {
                      // const yes = confirm('Delete all drafts?');
                      // if (yes) {
                      setUIState('loading');
                      try {
                        await db.drafts.delMany(
                          drafts.map((draft) => draft.key),
                        );
                        setUIState('default');
                        reload();
                      } catch (e) {
                        console.error(e);
                        alert('Error deleting drafts! Please try again.');
                        setUIState('error');
                      }
                      // }
                    })();
                  }}
                >
                  <button
                    type="button"
                    class="light danger"
                    disabled={uiState === 'loading'}
                  >
                    Delete all&hellip;
                  </button>
                </MenuConfirm>
              </p>
            )}
          </>
        ) : (
          <p>No drafts found.</p>
        )}
      </main>
    </div>
  );
}

function MiniDraft({ draft }) {
  const { draftStatus, replyTo } = draft;
  const { status, spoilerText, poll, mediaAttachments } = draftStatus;
  const hasPoll = poll?.options?.length > 0;
  const hasMedia = mediaAttachments?.length > 0;
  const hasPollOrMedia = hasPoll || hasMedia;
  const firstImageMedia = useMemo(() => {
    if (!hasMedia) return;
    const image = mediaAttachments.find((media) => /image/.test(media.type));
    if (!image) return;
    const { file } = image;
    const objectURL = URL.createObjectURL(file);
    return objectURL;
  }, [hasMedia, mediaAttachments]);
  return (
    <>
      <div class="mini-draft">
        {hasPollOrMedia && (
          <div
            class={`mini-draft-aside ${firstImageMedia ? 'has-image' : ''}`}
            style={
              firstImageMedia
                ? {
                    '--bg-image': `url(${firstImageMedia})`,
                  }
                : {}
            }
          >
            {hasPoll && <Icon icon="poll" />}
            {hasMedia && (
              <span>
                <Icon icon="attachment" />{' '}
                <small>{mediaAttachments?.length}</small>
              </span>
            )}
          </div>
        )}
        <div class="mini-draft-main">
          {!!spoilerText && <div class="mini-draft-spoiler">{spoilerText}</div>}
          {!!status && <div class="mini-draft-status">{status}</div>}
        </div>
      </div>
    </>
  );
}

export default Drafts;