/**
 * SharePoint node config - connection selector, path, search query.
 * Uses SharepointBrowseTree (FolderTree-style) for file selection.
 */

import React, { useEffect, useState, useCallback } from 'react';
import type { NodeConfigRendererProps } from './types';
import { fetchConnections, fetchBrowse, type UserConnection, type BrowseEntry } from '../../../api/automation2Api';
import { SharepointBrowseTree } from '../../FolderTree/SharepointBrowseTree';

export const SharePointNodeConfig: React.FC<NodeConfigRendererProps> = ({
  params,
  updateParam,
  instanceId,
  request,
  nodeType = 'sharepoint.findFile',
}) => {
  const [connections, setConnections] = useState<UserConnection[]>([]);
  const [browseExpanded, setBrowseExpanded] = useState(false);
  const [copySourceExpanded, setCopySourceExpanded] = useState(false);
  const [copyDestExpanded, setCopyDestExpanded] = useState(false);
  const [connectionsLoading, setConnectionsLoading] = useState(false);

  const connectionId = (params.connectionId as string) ?? '';
  const pathParam = 'path';
  const path = (params.path as string) ?? (params.filePath as string) ?? '';

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

  const loadChildren = useCallback(
    async (pathToLoad: string): Promise<BrowseEntry[]> => {
      if (!instanceId || !request || !connectionId) return [];
      const r = await fetchBrowse(request, instanceId, connectionId, 'sharepoint', pathToLoad);
      return r?.items ?? [];
    },
    [instanceId, request, connectionId]
  );

  const selectPath = useCallback(
    (p: string) => {
      updateParam(pathParam, p);
      setBrowseExpanded(false);
    },
    [updateParam, pathParam]
  );

  const selectSourcePath = useCallback(
    (p: string) => {
      updateParam('sourcePath', p);
      setCopySourceExpanded(false);
    },
    [updateParam]
  );

  const selectDestPath = useCallback(
    (p: string) => {
      updateParam('destPath', p);
      setCopyDestExpanded(false);
    },
    [updateParam]
  );

  const needsPath = !['sharepoint.findFile'].includes(nodeType);
  const needsSearch = nodeType === 'sharepoint.findFile';
  const needsSiteId = false;
  const hasPathInput = ['sharepoint.readFile', 'sharepoint.uploadFile', 'sharepoint.downloadFile', 'sharepoint.copyFile'].includes(nodeType);

  return (
    <>
      <div>
        <label>Connection</label>
        <select
          value={connectionId}
          onChange={(e) => updateParam('connectionId', e.target.value)}
          disabled={connectionsLoading}
        >
          <option value="">{connectionsLoading ? 'Loading...' : 'Select connection'}</option>
          {connections.map((c) => (
            <option key={c.id} value={c.id}>
              {c.externalUsername ?? c.id}
            </option>
          ))}
        </select>
      </div>
      {needsSearch && (
        <div>
          <label>Search query / path</label>
          <input
            value={(params.searchQuery as string) ?? ''}
            onChange={(e) => updateParam('searchQuery', e.target.value)}
            placeholder="/sites/SiteName/Shared Documents or search term"
          />
        </div>
      )}
      {needsPath && nodeType === 'sharepoint.listFiles' && (
        <div>
          <label>Folder path</label>
          <input
            value={path}
            onChange={(e) => updateParam('path', e.target.value)}
            placeholder="/ or /sites/SiteName/Shared Documents/Folder"
          />
        </div>
      )}
      {needsPath && ['sharepoint.readFile', 'sharepoint.uploadFile', 'sharepoint.downloadFile'].includes(nodeType) && (
        <div>
          <label>{nodeType === 'sharepoint.uploadFile' ? 'Target folder path' : 'Path'}</label>
          <input
            value={(params.path as string) ?? (params.filePath as string) ?? ''}
            onChange={(e) => updateParam('path', e.target.value)}
            placeholder={
              nodeType === 'sharepoint.downloadFile'
                ? '/sites/SiteName/Shared Documents/file.pdf'
                : nodeType === 'sharepoint.uploadFile'
                  ? '/sites/.../Shared Documents/TargetFolder/'
                  : 'File or folder path'
            }
          />
        </div>
      )}
      {needsSiteId && (
        <div>
          <label>Site ID</label>
          <input
            value={(params.siteId as string) ?? ''}
            onChange={(e) => updateParam('siteId', e.target.value)}
            placeholder="SharePoint site ID"
          />
        </div>
      )}
      {nodeType === 'sharepoint.copyFile' && (
        <>
          <div>
            <label>Source file</label>
            <input
              value={(params.sourcePath as string) ?? ''}
              onChange={(e) => updateParam('sourcePath', e.target.value)}
              placeholder="/sites/.../folder/file.pdf"
            />
          </div>
          <div>
            <label>Destination folder</label>
            <input
              value={(params.destPath as string) ?? ''}
              onChange={(e) => updateParam('destPath', e.target.value)}
              placeholder="/sites/.../target-folder/"
            />
          </div>
          {connectionId && (
            <>
              <details
                open={copySourceExpanded}
                onToggle={(e) => setCopySourceExpanded((e.target as HTMLDetailsElement).open)}
                style={{
                  marginTop: 12,
                  border: '1px solid var(--border-color, #e0e0e0)',
                  borderRadius: 6,
                  background: 'var(--bg-secondary, #f8f9fa)',
                  overflow: 'hidden',
                }}
              >
                <summary style={{ padding: '0.5rem 0.75rem', cursor: 'pointer', fontWeight: 500, fontSize: '0.875rem' }}>
                  📂 Source file durchsuchen
                </summary>
                <div style={{ padding: '0.5rem 0.75rem', borderTop: '1px solid var(--border-color, #e0e0e0)', maxHeight: 280, overflowY: 'auto' }}>
                  <SharepointBrowseTree rootPath="/" onLoadChildren={loadChildren} onSelectFile={selectSourcePath} selectedPath={(params.sourcePath as string) || null} />
                </div>
              </details>
              <details
                open={copyDestExpanded}
                onToggle={(e) => setCopyDestExpanded((e.target as HTMLDetailsElement).open)}
                style={{
                  marginTop: 8,
                  border: '1px solid var(--border-color, #e0e0e0)',
                  borderRadius: 6,
                  background: 'var(--bg-secondary, #f8f9fa)',
                  overflow: 'hidden',
                }}
              >
                <summary style={{ padding: '0.5rem 0.75rem', cursor: 'pointer', fontWeight: 500, fontSize: '0.875rem' }}>
                  📂 Zielordner durchsuchen
                </summary>
                <div style={{ padding: '0.5rem 0.75rem', borderTop: '1px solid var(--border-color, #e0e0e0)', maxHeight: 280, overflowY: 'auto' }}>
                  <SharepointBrowseTree rootPath="/" onLoadChildren={loadChildren} onSelectFile={() => {}} onSelectFolder={selectDestPath} selectedPath={(params.destPath as string) || null} />
                </div>
              </details>
            </>
          )}
        </>
      )}
      {connectionId && needsPath && hasPathInput && !['sharepoint.copyFile'].includes(nodeType) && (
        <details
          open={browseExpanded}
          onToggle={(e) => setBrowseExpanded((e.target as HTMLDetailsElement).open)}
          style={{
            marginTop: 12,
            border: '1px solid var(--border-color, #e0e0e0)',
            borderRadius: 6,
            background: 'var(--bg-secondary, #f8f9fa)',
            overflow: 'hidden',
          }}
        >
          <summary
            style={{
              padding: '0.5rem 0.75rem',
              cursor: 'pointer',
              fontWeight: 500,
              fontSize: '0.875rem',
              display: 'flex',
              alignItems: 'center',
              gap: '0.5rem',
              userSelect: 'none',
            }}
          >
            <span style={{ opacity: browseExpanded ? 0.7 : 1 }}>📂</span>
            SharePoint durchsuchen
          </summary>
          <div
            style={{
              padding: '0.5rem 0.75rem',
              borderTop: '1px solid var(--border-color, #e0e0e0)',
              maxHeight: 280,
              overflowY: 'auto',
            }}
          >
            <SharepointBrowseTree
              rootPath="/"
              onLoadChildren={loadChildren}
              onSelectFile={selectPath}
              selectedPath={path || null}
            />
          </div>
        </details>
      )}
    </>
  );
};