/**
 * Email node config - connection selector, folder dropdown, query, subject, body.
 */

import React, { useEffect, useState } from 'react';
import type { NodeConfigRendererProps } from './types';
import { fetchConnections, fetchBrowse, type UserConnection, type BrowseEntry } from '../../../../api/workflowApi';

export const EmailNodeConfig: React.FC<NodeConfigRendererProps> = ({
  params,
  updateParam,
  instanceId,
  request,
  nodeType = 'email.checkEmail',
}) => {
  const [connections, setConnections] = useState<UserConnection[]>([]);
  const [folders, setFolders] = useState<BrowseEntry[]>([]);
  const [loading, setLoading] = useState(false);
  const [foldersLoading, setFoldersLoading] = useState(false);

  useEffect(() => {
    if (instanceId && request) {
      setLoading(true);
      fetchConnections(request, instanceId)
        .then(setConnections)
        .catch(() => setConnections([]))
        .finally(() => setLoading(false));
    }
  }, [instanceId, request]);

  const connectionId = (params.connectionId as string) ?? '';
  const selectedConn = connections.find((c) => c.id === connectionId);
  const mailService = selectedConn?.authority === 'google' ? 'gmail' : 'outlook';

  useEffect(() => {
    if (instanceId && request && connectionId) {
      setFoldersLoading(true);
      fetchBrowse(request, instanceId, connectionId, mailService, '/')
        .then((r) => setFolders(r.items.filter((e) => e.isFolder)))
        .catch(() => setFolders([]))
        .finally(() => setFoldersLoading(false));
    } else {
      setFolders([]);
    }
  }, [instanceId, request, connectionId, mailService]);

  const isDraft = nodeType === 'email.draftEmail';
  const isSearch = nodeType === 'email.searchEmail';
  const folderValue = (params.folder as string) ?? (isSearch ? 'All' : 'Inbox');

  return (
    <>
      <div>
        <label>Account</label>
        <select
          value={connectionId}
          onChange={(e) => updateParam('connectionId', e.target.value)}
          disabled={loading}
        >
          <option value="">{loading ? 'Loading...' : 'Select connection'}</option>
          {connections.map((c) => (
            <option key={c.id} value={c.id}>
              {c.externalEmail ?? c.externalUsername ?? c.id}
            </option>
          ))}
        </select>
      </div>
      {!isDraft && (
        <div>
          <label>Folder</label>
          <select
            value={folderValue}
            onChange={(e) => updateParam('folder', e.target.value)}
            disabled={foldersLoading || !connectionId}
          >
            <option value="">
              {foldersLoading ? 'Loading folders...' : !connectionId ? 'Select account first' : 'Select folder'}
            </option>
            {isSearch && <option value="All">All</option>}
            {folders.length > 0
              ? folders.map((f) => {
                  const folderId = (f.path ?? '').replace(/^\//, '') || (f.metadata as { id?: string })?.id || '';
                  const value = folderId || f.name;
                  if (!value) return null;
                  return (
                    <option key={value} value={value}>
                      {f.name}
                    </option>
                  );
                })
              : !isSearch && (
                  <>
                    <option value="Inbox">Inbox</option>
                    <option value="Drafts">Drafts</option>
                    <option value="SentItems">Sent Items</option>
                    <option value="DeletedItems">Deleted Items</option>
                    <option value="JunkEmail">Junk Email</option>
                  </>
                )}
            {folderValue &&
              !folders.some(
                (f) =>
                  ((f.path ?? '').replace(/^\//, '') || (f.metadata as { id?: string })?.id) === folderValue
              ) &&
              folderValue !== 'All' && (
                <option value={folderValue}>{folderValue}</option>
              )}
          </select>
        </div>
      )}
      {isSearch && (
        <>
          <div>
            <label>Search query (optional)</label>
            <input
              value={(params.query as string) ?? ''}
              onChange={(e) => updateParam('query', e.target.value)}
              placeholder="General search term (subject, body, from)"
            />
          </div>
          <div>
            <label>From address (optional)</label>
            <input
              value={(params.fromAddress as string) ?? ''}
              onChange={(e) => updateParam('fromAddress', e.target.value)}
              placeholder="e.g. sender@example.com"
            />
          </div>
          <div>
            <label>To address (optional)</label>
            <input
              value={(params.toAddress as string) ?? ''}
              onChange={(e) => updateParam('toAddress', e.target.value)}
              placeholder="e.g. recipient@example.com"
            />
          </div>
          <div>
            <label>Subject contains (optional)</label>
            <input
              value={(params.subjectContains as string) ?? ''}
              onChange={(e) => updateParam('subjectContains', e.target.value)}
              placeholder="Word or phrase in subject"
            />
          </div>
          <div>
            <label>Body/content contains (optional)</label>
            <input
              value={(params.bodyContains as string) ?? ''}
              onChange={(e) => updateParam('bodyContains', e.target.value)}
              placeholder="Word or phrase in email body"
            />
          </div>
          <div style={{ display: 'flex', alignItems: 'center', gap: '0.5rem' }}>
            <input
              type="checkbox"
              id="searchHasAttachment"
              checked={!!(params.hasAttachment as boolean)}
              onChange={(e) => updateParam('hasAttachment', e.target.checked)}
            />
            <label htmlFor="searchHasAttachment">Only emails with attachment</label>
          </div>
          <div>
            <label>Limit</label>
            <input
              type="number"
              value={(params.limit as number) ?? 100}
              onChange={(e) => updateParam('limit', parseInt(e.target.value, 10) || 100)}
            />
          </div>
        </>
      )}
      {nodeType === 'email.checkEmail' && (
        <>
          <div>
            <label>From address (optional)</label>
            <input
              value={(params.fromAddress as string) ?? ''}
              onChange={(e) => updateParam('fromAddress', e.target.value)}
              placeholder="e.g. sender@example.com"
            />
          </div>
          <div>
            <label>Subject contains (optional)</label>
            <input
              value={(params.subjectContains as string) ?? ''}
              onChange={(e) => updateParam('subjectContains', e.target.value)}
              placeholder="Word or phrase in subject"
            />
          </div>
          <div style={{ display: 'flex', alignItems: 'center', gap: '0.5rem' }}>
            <input
              type="checkbox"
              id="hasAttachment"
              checked={!!(params.hasAttachment as boolean)}
              onChange={(e) => updateParam('hasAttachment', e.target.checked)}
            />
            <label htmlFor="hasAttachment">Only emails with attachment</label>
          </div>
          <div>
            <label>Limit</label>
            <input
              type="number"
              value={(params.limit as number) ?? 100}
              onChange={(e) => updateParam('limit', parseInt(e.target.value, 10) || 100)}
            />
          </div>
        </>
      )}
      {isDraft && (
        <>
          <div>
            <label>Subject</label>
            <input
              value={(params.subject as string) ?? ''}
              onChange={(e) => updateParam('subject', e.target.value)}
              placeholder="Email subject (or leave empty if connected to AI node above)"
            />
          </div>
          <div>
            <label>Body</label>
            <textarea
              value={(params.body as string) ?? ''}
              onChange={(e) => updateParam('body', e.target.value)}
              placeholder="Email body (or leave empty if connected to AI node above)"
              rows={4}
            />
          </div>
          <div>
            <label>To (optional)</label>
            <input
              value={(params.to as string) ?? ''}
              onChange={(e) => updateParam('to', e.target.value)}
              placeholder="Recipient(s) (or from AI when connected)"
            />
          </div>
        </>
      )}
    </>
  );
};