/**
 * ToolActivityLog -- Real-time tool call activity display.
 *
 * Renders tool calls in a human-readable format:
 * - Friendly tool names instead of internal identifiers
 * - Args filtered to hide UUIDs/internal codes on success
 * - Full details shown on error for debugging
 */

import React, { useState} from 'react';
import type { ToolActivity } from './useWorkspace';
import { useLanguage } from '../../../providers/language/LanguageContext';

interface ToolActivityLogProps {
  activities: ToolActivity[];
}

const _UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;

const _HIDDEN_ARG_KEYS = new Set([
  'mandateId', 'userId', 'featureInstanceId', 'workflowId', 'sessionId',
]);

function _isInternalValue(v: unknown): boolean {
  if (typeof v !== 'string') return false;
  if (_UUID_RE.test(v)) return true;
  if (v.length > 60 && !v.includes(' ')) return true;
  return false;
}

function _formatArgs(args: Record<string, any>, isError: boolean): string {
  const parts: string[] = [];
  for (const [k, v] of Object.entries(args)) {
    if (!isError && _HIDDEN_ARG_KEYS.has(k)) continue;
    if (!isError && _isInternalValue(v)) continue;

    let display: string;
    if (typeof v === 'string') {
      display = v.length > 80 ? v.slice(0, 77) + '...' : v;
    } else if (typeof v === 'number' || typeof v === 'boolean') {
      display = String(v);
    } else if (v === null || v === undefined) {
      continue;
    } else {
      const json = JSON.stringify(v);
      display = json.length > 80 ? json.slice(0, 77) + '...' : json;
    }
    parts.push(`${k}: ${display}`);
  }
  return parts.join(', ') || (isError ? JSON.stringify(args) : '');
}

export const ToolActivityLog: React.FC<ToolActivityLogProps> = ({ activities }) => {
  const { t } = useLanguage();
  const [expandedId, setExpandedId] = useState<string | null>(null);

  const _formatResult = (result: string): string => {
    if (!result) return '';
    const trimmed = result.trim();

    if (trimmed.startsWith('{') || trimmed.startsWith('[')) {
      try {
        const parsed = JSON.parse(trimmed);
        if (Array.isArray(parsed)) {
          return t('{count} Ergebnisse', { count: parsed.length });
        }
        if (typeof parsed === 'object' && parsed !== null) {
          const keys = Object.keys(parsed);
          if (parsed.count !== undefined) return t('{count} Einträge', { count: parsed.count });
          if (parsed.total !== undefined) return t('{count} Einträge', { count: parsed.total });
          if (parsed.rows && Array.isArray(parsed.rows)) {
            return t('{count} Zeilen', { count: parsed.rows.length });
          }
          if (parsed.data && Array.isArray(parsed.data)) {
            return t('{count} Einträge', { count: parsed.data.length });
          }
          if (parsed.result !== undefined) {
            const r = String(parsed.result);
            return r.length > 120 ? r.slice(0, 117) + '...' : r;
          }
          if (keys.length <= 3) {
            return keys.map((k) => `${k}: ${String(parsed[k]).slice(0, 40)}`).join(', ');
          }
          return t('Objekt ({count} Felder)', { count: keys.length });
        }
      } catch {
        // not valid JSON
      }
    }

    return trimmed.length > 150 ? trimmed.slice(0, 147) + '...' : trimmed;
  };

  const _getToolLabel = (toolName: string): string => {
    switch (toolName) {
      case 'addNode': return t('Knoten hinzufügen');
      case 'aggregateTable': return t('Tabelle aggregieren');
      case 'browseContainer': return t('Datei durchsuchen');
      case 'browseDataSource': return t('Datenquelle durchsuchen');
      case 'browseTable': return t('Tabelle durchsuchen');
      case 'clickup_createTask': return t('ClickUp-Aufgabe erstellen');
      case 'clickup_searchTasks': return t('ClickUp-Aufgaben suchen');
      case 'clickup_updateTask': return t('ClickUp-Aufgabe aktualisieren');
      case 'connectNodes': return t('Knoten verbinden');
      case 'copyFile': return t('Datei kopieren');
      case 'createChart': return t('Diagramm erstellen');
      case 'createGroup': return t('Gruppe anlegen');
      case 'createFolder': return t('Ordner anlegen');
      case 'createRecord': return t('Datensatz erstellen');
      case 'deleteFile': return t('Datei löschen');
      case 'deleteGroup': return t('Gruppe löschen');
      case 'deleteFolder': return t('Ordner löschen');
      case 'deleteRecord': return t('Datensatz löschen');
      case 'describeImage': return t('Bild beschreiben');
      case 'detectLanguage': return t('Sprache erkennen');
      case 'downloadFromDataSource': return t('Aus Datenquelle laden');
      case 'executeCode': return t('Code ausführen');
      case 'extractContainerItem': return t('Element extrahieren');
      case 'generateImage': return t('Bild erzeugen');
      case 'getFileInfo': return t('Datei-Info abrufen');
      case 'getTableSchema': return t('Tabellenschema abrufen');
      case 'jira_connect': return t('Jira verbinden');
      case 'jira_exportTickets': return t('Jira-Tickets exportieren');
      case 'jira_importTickets': return t('Jira-Tickets importieren');
      case 'listAvailableNodeTypes': return t('Verfügbare Knotentypen auflisten');
      case 'listConnections': return t('Verbindungen auflisten');
      case 'listFiles': return t('Dateien auflisten');
      case 'listGroups': return t('Gruppen auflisten');
      case 'listItemsInGroup': return t('Gruppeninhalt auflisten');
      case 'addItemsToGroup': return t('Zu Gruppe hinzufügen');
      case 'moveItemsBetweenGroups': return t('Zwischen Gruppen verschieben');
      case 'ensureInstanceGroup': return t('Instanzgruppe sicherstellen');
      case 'ensureTempGroup': return t('Temp-Gruppe sicherstellen');
      case 'listFolders': return t('Ordner auflisten');
      case 'listTables': return t('Tabellen auflisten');
      case 'listWorkflowHistory': return t('Workflow-Verlauf');
      case 'moveFile': return t('Datei verschieben');
      case 'moveGroup': return t('Gruppe verschieben');
      case 'renameGroup': return t('Gruppe umbenennen');
      case 'moveFolder': return t('Ordner verschieben');
      case 'neutralizeData': return t('Daten neutralisieren');
      case 'outlook_composeAndDraftReply': return t('Outlook-Antwort entwerfen');
      case 'outlook_readEmails': return t('Outlook-E-Mails lesen');
      case 'outlook_searchEmails': return t('Outlook durchsuchen');
      case 'outlook_sendDraft': return t('Outlook-Entwurf senden');
      case 'queryFeatureInstance': return t('Feature abfragen');
      case 'queryTable': return t('Tabelle abfragen');
      case 'readContentObjects': return t('Inhalte lesen');
      case 'readFile': return t('Datei lesen');
      case 'readUrl': return t('URL lesen');
      case 'readWorkflowGraph': return t('Workflow-Graph lesen');
      case 'readWorkflowMessages': return t('Workflow-Nachrichten lesen');
      case 'removeNode': return t('Knoten entfernen');
      case 'renderDocument': return t('Dokument rendern');
      case 'replaceInFile': return t('Text in Datei ersetzen');
      case 'requestToolbox': return t('Toolbox anfordern');
      case 'renameFile': return t('Datei umbenennen');
      case 'renameFolder': return t('Ordner umbenennen');
      case 'searchDataSource': return t('In Datenquelle suchen');
      case 'searchDocuments': return t('Dokumente suchen');
      case 'searchInFileContent': return t('In Datei suchen');
      case 'sendMail': return t('E-Mail senden');
      case 'setNodeParameter': return t('Knotenparameter setzen');
      case 'sharepoint_findDocuments': return t('SharePoint-Dokumente finden');
      case 'sharepoint_readDocuments': return t('SharePoint-Dokumente lesen');
      case 'sharepoint_upload': return t('SharePoint-Upload');
      case 'speechToText': return t('Sprache zu Text');
      case 'summarizeContent': return t('Inhalt zusammenfassen');
      case 'tagFile': return t('Datei taggen');
      case 'textToSpeech': return t('Text zu Sprache');
      case 'translateText': return t('Text übersetzen');
      case 'trustee_refreshAccountingData': return t('Treuhand-Buchhaltung aktualisieren');
      case 'uploadToExternal': return t('Extern hochladen');
      case 'validateGraph': return t('Graph validieren');
      case 'webSearch': return t('Websuche');
      case 'writeFile': return t('Datei schreiben');
      default: return toolName;
    }
  };

  const _getStatusLabel = (status: string): string => {
    switch (status) {
      case 'calling': return t('läuft');
      case 'success': return t('OK');
      case 'error': return t('Fehler');
      default: return status;
    }
  };

  if (!activities.length) {
    return (
      <div style={{ padding: 16, textAlign: 'center', color: 'var(--color-text-secondary, #999)', fontSize: 12 }}>
        {t('Noch keine Aktivität')}
      </div>
    );
  }

  return (
    <div style={{ padding: 8 }}>
      {activities.map(activity => {
        const isError = activity.status === 'error';
        const isExpanded = expandedId === activity.id;
        const friendlyName = _getToolLabel(activity.toolName);
        const argsText = activity.args && Object.keys(activity.args).length > 0
          ? _formatArgs(activity.args, isError)
          : '';
        const resultText = activity.result ? _formatResult(activity.result) : '';

        return (
          <div
            key={activity.id}
            style={{
              padding: '8px 10px',
              marginBottom: 6,
              borderRadius: 6,
              fontSize: 12,
              border: `1px solid ${
                activity.status === 'calling'
                  ? 'var(--color-warning, #ffc107)'
                  : activity.status === 'success'
                    ? 'var(--color-success, #4caf50)'
                    : 'var(--color-error, #f44336)'
              }30`,
              background: activity.status === 'calling'
                ? 'rgba(255, 193, 7, 0.08)'
                : activity.status === 'success'
                  ? 'rgba(76, 175, 80, 0.06)'
                  : 'rgba(244, 67, 54, 0.06)',
              cursor: 'pointer',
              transition: 'background 0.15s ease',
            }}
            onClick={() => setExpandedId(isExpanded ? null : activity.id)}
          >
            <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
              <span style={{ fontWeight: 600 }}>
                {friendlyName}
                {friendlyName !== activity.toolName && (
                  <span style={{ fontWeight: 400, opacity: 0.5, marginLeft: 6, fontSize: 10 }}>
                    {activity.toolName}
                  </span>
                )}
              </span>
              <span style={{
                fontSize: 10,
                padding: '1px 6px',
                borderRadius: 3,
                background: activity.status === 'calling'
                  ? 'var(--color-warning, #ffc107)'
                  : activity.status === 'success'
                    ? 'var(--color-success, #4caf50)'
                    : 'var(--color-error, #f44336)',
                color: '#fff',
              }}>
                {_getStatusLabel(activity.status)}
              </span>
            </div>

            {argsText && (
              <div style={{ marginTop: 4, color: 'var(--color-text-secondary, #666)', fontSize: 11 }}>
                {argsText}
              </div>
            )}

            {resultText && !isError && (
              <div style={{
                marginTop: 4,
                color: 'var(--color-success, #388e3c)',
                fontSize: 11,
                maxHeight: isExpanded ? 'none' : 40,
                overflow: 'hidden',
              }}>
                {resultText}
              </div>
            )}

            {activity.error && (
              <div style={{ marginTop: 4, color: 'var(--color-error, #c62828)', fontSize: 11 }}>
                {activity.error}
              </div>
            )}

            {isExpanded && activity.args && Object.keys(activity.args).length > 0 && (
              <details open style={{ marginTop: 6 }}>
                <summary style={{ fontSize: 10, color: 'var(--color-text-secondary, #888)', cursor: 'pointer' }}>
                  {t('Alle Parameter')}
                </summary>
                <pre style={{
                  fontSize: 10,
                  margin: '4px 0 0',
                  padding: 6,
                  background: 'rgba(0,0,0,0.04)',
                  borderRadius: 4,
                  overflow: 'auto',
                  maxHeight: 200,
                  whiteSpace: 'pre-wrap',
                  wordBreak: 'break-all',
                }}>
                  {JSON.stringify(activity.args, null, 2)}
                </pre>
              </details>
            )}

            {isExpanded && activity.result && (
              <details open style={{ marginTop: 4 }}>
                <summary style={{ fontSize: 10, color: 'var(--color-text-secondary, #888)', cursor: 'pointer' }}>
                  {t('Vollständiges Ergebnis')}
                </summary>
                <pre style={{
                  fontSize: 10,
                  margin: '4px 0 0',
                  padding: 6,
                  background: 'rgba(0,0,0,0.04)',
                  borderRadius: 4,
                  overflow: 'auto',
                  maxHeight: 300,
                  whiteSpace: 'pre-wrap',
                  wordBreak: 'break-all',
                }}>
                  {activity.result}
                </pre>
              </details>
            )}
          </div>
        );
      })}
    </div>
  );
};