/**
 * CommCoach Dossier View (Main View)
 *
 * Unified view per context: Coaching session, Tasks, Sessions history, Scores, Documents.
 * Voice first, always with text fallback.
 */

import React, { useState, useRef, useCallback, useEffect } from 'react';
import { useCommcoach } from '../../../hooks/useCommcoach';
import { useApiRequest } from '../../../hooks/useApi';
import { useInstanceId } from '../../../hooks/useCurrentInstance';
import api from '../../../api';
import {
  getDossierExportUrl, getSessionExportUrl,
  getDocumentsApi, uploadDocumentApi, deleteDocumentApi,
  getScoreHistoryApi, getPersonasApi,
  type CoachingDocument, type CoachingPersona,
} from '../../../api/commcoachApi';
import AutoScroll from '../../../components/UiComponents/AutoScroll/AutoScroll';
import ReactMarkdown from 'react-markdown';
import remarkGfm from 'remark-gfm';
import styles from './CommcoachDossierView.module.css';

type TabKey = 'coaching' | 'tasks' | 'sessions' | 'scores' | 'documents';

export const CommcoachDossierView: React.FC = () => {
  const coach = useCommcoach();
  const { request } = useApiRequest();
  const instanceId = useInstanceId();

  const [activeTab, setActiveTab] = useState<TabKey>('coaching');
  const [showNewContext, setShowNewContext] = useState(false);
  const [newTitle, setNewTitle] = useState('');
  const [newDescription, setNewDescription] = useState('');
  const [newCategory, setNewCategory] = useState('custom');

  const [newTaskTitle, setNewTaskTitle] = useState('');
  const [documents, setDocuments] = useState<CoachingDocument[]>([]);
  const [uploading, setUploading] = useState(false);
  const [scoreHistory, setScoreHistory] = useState<Record<string, Array<{ score: number; createdAt?: string }>>>({});
  const [personas, setPersonas] = useState<CoachingPersona[]>([]);
  const [selectedPersonaId, setSelectedPersonaId] = useState<string | undefined>(undefined);

  const inputRef = useRef<HTMLTextAreaElement>(null);
  const streamRef = useRef<MediaStream | null>(null);
  const speechRecognitionRef = useRef<SpeechRecognition | null>(null);
  const transcriptPartsRef = useRef<string[]>([]);
  const processedResultIndexRef = useRef(0);
  const silenceTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
  const [isListening, setIsListening] = useState(false);
  const [isUserSpeaking, setIsUserSpeaking] = useState(false);
  const [liveTranscript, setLiveTranscript] = useState('');
  const [isTtsPlaying, setIsTtsPlaying] = useState(false);

  // #region agent log
  const debugLogsRef = useRef<string[]>([]);
  const [debugVisible, setDebugVisible] = useState(false);
  const [debugSnapshot, setDebugSnapshot] = useState<string[]>([]);
  const _dlog = useCallback((tag: string, info?: string) => {
    const t = new Date();
    const ts = `${t.getMinutes()}:${String(t.getSeconds()).padStart(2,'0')}.${String(t.getMilliseconds()).padStart(3,'0')}`;
    const entry = `[${ts}] ${tag}${info ? ' ' + info : ''}`;
    debugLogsRef.current.push(entry);
    if (debugLogsRef.current.length > 80) debugLogsRef.current.shift();
  }, []);
  useEffect(() => { (window as any).__dlog = _dlog; return () => { delete (window as any).__dlog; }; }, [_dlog]);
  // #endregion

  // Auto-select first context
  useEffect(() => {
    if (!coach.selectedContextId && coach.contexts.length > 0) {
      coach.selectContext(coach.contexts[0].id, { skipSessionResume: true });
    }
  }, [coach.contexts, coach.selectedContextId, coach.selectContext]);

  // Load documents, scores, personas when context changes
  useEffect(() => {
    if (!instanceId || !coach.selectedContextId) return;
    getDocumentsApi(request, instanceId, coach.selectedContextId)
      .then(d => setDocuments(d))
      .catch(() => {});
    getScoreHistoryApi(request, instanceId, coach.selectedContextId)
      .then(h => setScoreHistory(h))
      .catch(() => {});
  }, [instanceId, request, coach.selectedContextId]);

  useEffect(() => {
    coach.onDocumentCreatedRef.current = (doc) => {
      setDocuments(prev => {
        if (prev.some(d => d.id === doc.id)) return prev;
        return [doc, ...prev];
      });
    };
    return () => { coach.onDocumentCreatedRef.current = null; };
  }, [coach.onDocumentCreatedRef]);

  useEffect(() => {
    if (!instanceId) return;
    getPersonasApi(request, instanceId)
      .then(p => setPersonas(p))
      .catch(() => {});
  }, [instanceId, request]);

  // TTS playing state sync
  useEffect(() => {
    if (!coach.session) return;
    const interval = setInterval(() => {
      setIsTtsPlaying(coach.isTtsPlayingRef.current);
    }, 200);
    return () => clearInterval(interval);
  }, [coach.session, coach.isTtsPlayingRef]);

  // Speech Recognition (only when coaching tab active + session running + not muted)
  useEffect(() => {
    if (activeTab !== 'coaching' || !coach.session || coach.isMuted) {
      if (speechRecognitionRef.current) {
        try { speechRecognitionRef.current.stop(); } catch { /* ignore */ }
        speechRecognitionRef.current = null;
      }
      if (streamRef.current) {
        streamRef.current.getTracks().forEach(t => t.stop());
        streamRef.current = null;
      }
      setIsListening(false);
      setIsUserSpeaking(false);
      return;
    }

    const SpeechRecognitionApi = (window as any).SpeechRecognition || (window as any).webkitSpeechRecognition;
    if (!SpeechRecognitionApi) return;

    let cancelled = false;
    const MIN_WORDS_TO_INTERRUPT = 4;

    const init = async () => {
      try {
        const stream = await navigator.mediaDevices.getUserMedia({
          audio: { echoCancellation: true, noiseSuppression: true },
        });
        if (cancelled) { stream.getTracks().forEach(t => t.stop()); return; }
        streamRef.current = stream;
        setIsListening(true);

        const recognition = new SpeechRecognitionApi();
        recognition.continuous = true;
        recognition.interimResults = true;
        recognition.lang = 'de-DE';

        const SILENCE_TIMEOUT_MS = 1500;

        const _sendAndClearTranscript = () => {
          const fullTranscript = transcriptPartsRef.current.join(' ').trim();
          // #region agent log
          const wc = fullTranscript.split(/\s+/).filter(Boolean).length;
          _dlog('SEND', `words=${wc} send=${wc>=MIN_WORDS_TO_INTERRUPT} "${fullTranscript.substring(0,60)}"`);
          // #endregion
          if (fullTranscript) {
            const wordCount = fullTranscript.split(/\s+/).filter(Boolean).length;
            if (wordCount >= MIN_WORDS_TO_INTERRUPT) coach.sendMessage(fullTranscript);
          }
          transcriptPartsRef.current = [];
          processedResultIndexRef.current = 0;
          setLiveTranscript('');
          setIsUserSpeaking(false);
        };

        const _resetSilenceTimer = () => {
          if (silenceTimerRef.current) clearTimeout(silenceTimerRef.current);
          silenceTimerRef.current = setTimeout(() => {
            if (cancelled) return;
            _sendAndClearTranscript();
          }, SILENCE_TIMEOUT_MS);
        };

        recognition.onspeechstart = () => {
          // #region agent log
          _dlog('SPCH-START', `tts=${coach.isTtsPlayingRef.current}`);
          // #endregion
          if (cancelled || coach.isTtsPlayingRef.current) return;
          setIsUserSpeaking(true);
          transcriptPartsRef.current = [];
          processedResultIndexRef.current = 0;
          setLiveTranscript('');
          _resetSilenceTimer();
        };

        recognition.onresult = (event: SpeechRecognitionEvent) => {
          if (cancelled) return;
          const interimParts: string[] = [];
          for (let i = processedResultIndexRef.current; i < event.results.length; i++) {
            const r = event.results[i];
            if (r.isFinal) {
              const text = r[0].transcript.trim();
              if (text) transcriptPartsRef.current.push(text);
              processedResultIndexRef.current = i + 1;
            } else {
              if (coach.isTtsPlayingRef.current) continue;
              const text = r[0].transcript.trim();
              if (text) interimParts.push(text);
            }
          }
          const currentInterim = interimParts.join(' ');
          const preview = [...transcriptPartsRef.current, currentInterim].join(' ').trim();
          setLiveTranscript(preview);
          if (preview) _resetSilenceTimer();
          const finalizedWords = transcriptPartsRef.current.join(' ').split(/\s+/).filter(Boolean).length;
          if (coach.isTtsPlayingRef.current && finalizedWords >= MIN_WORDS_TO_INTERRUPT) {
            coach.stopTts();
          }
        };

        recognition.onspeechend = () => {
          // #region agent log
          _dlog('SPCH-END', `tts=${coach.isTtsPlayingRef.current} parts=${transcriptPartsRef.current.length}`);
          // #endregion
          if (cancelled) return;
          if (silenceTimerRef.current) clearTimeout(silenceTimerRef.current);
          if (coach.isTtsPlayingRef.current) {
            transcriptPartsRef.current = [];
            processedResultIndexRef.current = 0;
            setLiveTranscript('');
            setIsUserSpeaking(false);
            return;
          }
          _sendAndClearTranscript();
        };

        recognition.onend = () => {
          // #region agent log
          _dlog('REC-END', `cancelled=${cancelled} sameRef=${speechRecognitionRef.current===recognition} tts=${coach.isTtsPlayingRef.current}`);
          // #endregion
          if (cancelled) return;
          if (coach.isTtsPlayingRef.current) return;
          if (speechRecognitionRef.current === recognition) {
            try { recognition.start(); } catch { speechRecognitionRef.current = null; }
          }
        };

        recognition.onerror = (event: any) => {
          // #region agent log
          _dlog('REC-ERR', event.error);
          // #endregion
          if (event.error === 'no-speech' || event.error === 'aborted') return;
          console.warn('SpeechRecognition error:', event.error);
        };

        speechRecognitionRef.current = recognition;
        recognition.start();
      } catch (err) {
        console.warn('Mic access failed:', err);
      }
    };

    init();
    return () => {
      // #region agent log
      _dlog('CLEANUP', `tab=${activeTab} sess=${coach.session?.id} muted=${coach.isMuted}`);
      // #endregion
      cancelled = true;
      coach.stopTts();
      if (silenceTimerRef.current) clearTimeout(silenceTimerRef.current);
      if (speechRecognitionRef.current) {
        try { speechRecognitionRef.current.stop(); } catch { /* ignore */ }
        speechRecognitionRef.current = null;
      }
      if (streamRef.current) {
        streamRef.current.getTracks().forEach(t => t.stop());
        streamRef.current = null;
      }
    };
  }, [activeTab, coach.session?.id, coach.isMuted]);

  // On mobile, SpeechRecognition and Audio output conflict for the audio session.
  // Pause recognition while TTS plays, resume when it stops.
  useEffect(() => {
    if (!speechRecognitionRef.current) return;
    if (isTtsPlaying) {
      // #region agent log
      _dlog('REC-SUSPEND', 'tts started, stopping recognition');
      // #endregion
      try { speechRecognitionRef.current.stop(); } catch { /* ignore */ }
    } else {
      // #region agent log
      _dlog('REC-RESUME', 'tts ended, restarting recognition');
      // #endregion
      try { speechRecognitionRef.current.start(); } catch { /* ignore */ }
    }
  }, [isTtsPlaying, _dlog]);

  // Reset mute when session ends
  useEffect(() => {
    if (!coach.session) coach.setMuted(false);
  }, [coach.session]);

  // Focus input on session start
  useEffect(() => {
    if (coach.session && inputRef.current) inputRef.current.focus();
  }, [coach.session]);

  const handleSend = useCallback(async () => {
    if (!coach.inputValue.trim() || coach.isStreaming) return;
    await coach.sendMessage(coach.inputValue);
  }, [coach]);

  const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
    if (e.key === 'Enter' && !e.shiftKey) { e.preventDefault(); handleSend(); }
  }, [handleSend]);

  const handleCreateContext = useCallback(async () => {
    if (!newTitle.trim()) return;
    await coach.createContext(newTitle, newDescription || undefined, newCategory);
    setNewTitle('');
    setNewDescription('');
    setNewCategory('custom');
    setShowNewContext(false);
  }, [newTitle, newDescription, newCategory, coach]);

  const handleSelectContext = useCallback((contextId: string) => {
    coach.selectContext(contextId, { skipSessionResume: true });
  }, [coach]);

  const handleUpload = useCallback(async (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0];
    if (!file || !instanceId || !coach.selectedContextId) return;
    setUploading(true);
    try {
      const doc = await uploadDocumentApi(instanceId, coach.selectedContextId, file);
      setDocuments(prev => [doc, ...prev]);
    } catch { /* upload failed */ } finally {
      setUploading(false);
      e.target.value = '';
    }
  }, [instanceId, coach.selectedContextId]);

  const handleDeleteDocument = useCallback(async (docId: string) => {
    if (!instanceId) return;
    try {
      await deleteDocumentApi(request, instanceId, docId);
      setDocuments(prev => prev.filter(d => d.id !== docId));
    } catch { /* delete failed */ }
  }, [instanceId, request]);

  const handleDownloadDocument = useCallback(async (doc: CoachingDocument) => {
    if (!doc.fileRef) return;
    try {
      const response = await api.get(`/api/files/${doc.fileRef}/download`, {
        responseType: 'blob',
      });
      const url = window.URL.createObjectURL(response.data);
      const a = document.createElement('a');
      a.href = url;
      a.download = doc.fileName;
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);
      window.URL.revokeObjectURL(url);
    } catch (err) {
      console.error('Download failed:', err);
    }
  }, []);

  const handleAddTask = useCallback(async () => {
    if (!newTaskTitle.trim()) return;
    await coach.addTask(newTaskTitle);
    setNewTaskTitle('');
  }, [newTaskTitle, coach]);

  if (coach.loadingContexts) {
    return <div className={styles.empty}><p>Lade...</p></div>;
  }

  return (
    <div className={styles.dossier}>
      {/* Context Selector */}
      <div className={styles.contextSelector}>
        {coach.contexts.map(ctx => (
          <button
            key={ctx.id}
            className={`${styles.contextChip} ${ctx.id === coach.selectedContextId ? styles.contextChipActive : ''}`}
            onClick={() => handleSelectContext(ctx.id)}
          >
            <span className={styles.contextChipIcon}>{_categoryIcon(ctx.category)}</span>
            {ctx.title}
          </button>
        ))}
        <button
          className={styles.contextChipNew}
          onClick={() => setShowNewContext(!showNewContext)}
          title="Neues Thema"
        >
          +
        </button>
      </div>

      {/* New Context Form */}
      {showNewContext && (
        <div className={styles.newContextForm}>
          <input
            className={styles.newContextInput}
            placeholder="Thema / Titel..."
            value={newTitle}
            onChange={e => setNewTitle(e.target.value)}
            onKeyDown={e => e.key === 'Enter' && handleCreateContext()}
            autoFocus
          />
          <input
            className={styles.newContextInput}
            placeholder="Beschreibung (optional)"
            value={newDescription}
            onChange={e => setNewDescription(e.target.value)}
          />
          <select className={styles.newContextInput} value={newCategory} onChange={e => setNewCategory(e.target.value)}>
            <option value="custom">Individuell</option>
            <option value="leadership">Führung</option>
            <option value="conflict">Konflikt</option>
            <option value="negotiation">Verhandlung</option>
            <option value="presentation">Präsentation</option>
            <option value="feedback">Feedback</option>
            <option value="delegation">Delegation</option>
            <option value="changeManagement">Change Management</option>
          </select>
          <div className={styles.newContextActions}>
            <button className={styles.btnPrimary} onClick={handleCreateContext} disabled={!newTitle.trim() || !!coach.actionLoading}>
              {coach.actionLoading === 'creating' ? 'Wird erstellt...' : 'Erstellen'}
            </button>
            <button className={styles.btnSecondary} onClick={() => setShowNewContext(false)}>Abbrechen</button>
          </div>
        </div>
      )}

      {/* No context selected */}
      {!coach.selectedContextId && !showNewContext && coach.contexts.length === 0 && (
        <div className={styles.empty}>
          <h3>Willkommen beim Kommunikations-Coach</h3>
          <p>Erstelle ein Thema, um zu beginnen.</p>
          <button className={styles.btnPrimary} onClick={() => setShowNewContext(true)}>Neues Thema erstellen</button>
        </div>
      )}

      {coach.selectedContextId && (<>
        {/* Context Header */}
        <div className={styles.header}>
          <div>
            <h2 className={styles.title}>{coach.selectedContext?.title}</h2>
            {coach.selectedContext?.description && (
              <p className={styles.description}>{coach.selectedContext.description}</p>
            )}
          </div>
          <div className={styles.headerActions}>
            {instanceId && (
              <>
                <a className={styles.btnExport} href={getDossierExportUrl(instanceId, coach.selectedContextId, 'md')} target="_blank" rel="noopener noreferrer">Export MD</a>
                <a className={styles.btnExport} href={getDossierExportUrl(instanceId, coach.selectedContextId, 'pdf')} target="_blank" rel="noopener noreferrer">Export PDF</a>
              </>
            )}
            <button className={styles.btnArchive} onClick={() => coach.archiveContext(coach.selectedContextId!)} disabled={!!coach.actionLoading}>
              {coach.actionLoading === 'archiving' ? 'Wird archiviert...' : 'Archivieren'}
            </button>
          </div>
        </div>

        {/* Tab Navigation */}
        <div className={styles.tabs}>
          {(['coaching', 'tasks', 'sessions', 'scores', 'documents'] as TabKey[]).map(tab => (
            <button
              key={tab}
              className={`${styles.tab} ${activeTab === tab ? styles.tabActive : ''}`}
              onClick={() => setActiveTab(tab)}
            >
              {_tabLabel(tab, coach, documents)}
            </button>
          ))}
        </div>

        {/* ============================================================ */}
        {/* COACHING TAB */}
        {/* ============================================================ */}
        {activeTab === 'coaching' && (
          <div className={styles.coachingTab}>
            {!coach.session ? (
              <div className={styles.sessionStart}>
                <p>Starte eine neue Coaching-Session zu diesem Thema.</p>
                {personas.length > 0 && (
                  <div className={styles.personaSelector}>
                    <label className={styles.personaLabel}>Gesprächspartner wählen:</label>
                    <div className={styles.personaGrid}>
                      {personas.map(p => (
                        <button
                          key={p.id}
                          className={`${styles.personaChip} ${selectedPersonaId === p.id ? styles.personaChipActive : ''}`}
                          onClick={() => setSelectedPersonaId(selectedPersonaId === p.id ? undefined : p.id)}
                          title={p.description}
                        >
                          <span className={styles.personaGender}>{p.gender === 'f' ? '\u2640' : p.gender === 'm' ? '\u2642' : '\u25CB'}</span>
                          <span>{p.label}</span>
                        </button>
                      ))}
                    </div>
                  </div>
                )}
                <button className={styles.btnPrimary} onClick={() => coach.startSession(selectedPersonaId)} disabled={!!coach.actionLoading}>
                  {coach.actionLoading === 'starting'
                    ? 'Wird gestartet...'
                    : selectedPersonaId && personas.find(p => p.id === selectedPersonaId)
                      ? `Session starten mit ${personas.find(p => p.id === selectedPersonaId)!.label}`
                      : 'Session starten'}
                </button>
              </div>
            ) : (
              <>
                {/* Session Header */}
                <div className={styles.sessionHeader}>
                  <span className={styles.sessionLabel}>Session aktiv</span>
                  <div className={styles.sessionActions}>
                    {isTtsPlaying && (
                      <button className={styles.btnSmallDanger} onClick={coach.stopTts}>Stop</button>
                    )}
                    {coach.wasInterrupted && !isTtsPlaying && (
                      <button className={styles.btnSmall} onClick={coach.resumeTts}>Weitersprechen</button>
                    )}
                    <button
                      className={`${styles.btnSmall} ${coach.isMuted ? styles.mutedActive : ''}`}
                      onClick={() => coach.setMuted(!coach.isMuted)}
                      title={coach.isMuted ? 'Stummschaltung aufheben' : 'Stummschalten'}
                    >
                      {coach.isMuted ? '\u{1F507} Stumm' : '\u{1F3A4} Ton an'}
                    </button>
                    <button className={styles.btnSmall} onClick={coach.completeSession} disabled={!!coach.actionLoading}>
                      {coach.actionLoading === 'completing' ? 'Wird abgeschlossen...' : 'Abschliessen'}
                    </button>
                    <button className={styles.btnSmallDanger} onClick={coach.cancelSession} disabled={!!coach.actionLoading}>
                      {coach.actionLoading === 'cancelling' ? 'Wird abgebrochen...' : 'Abbrechen'}
                    </button>
                  </div>
                </div>

                {/* Messages */}
                <AutoScroll scrollDependency={coach.messages.length + (coach.isStreaming ? 1 : 0) + liveTranscript.length}>
                  <div className={styles.messages}>
                    {coach.messages.map(msg => (
                      <div key={msg.id} className={`${styles.message} ${msg.role === 'user' ? styles.messageUser : styles.messageAssistant}`}>
                        <div className={styles.messageBubble}>
                          <ReactMarkdown remarkPlugins={[remarkGfm]}>{msg.content}</ReactMarkdown>
                        </div>
                        <div className={styles.messageTime}>
                          {msg.createdAt ? new Date(msg.createdAt).toLocaleTimeString('de-CH', { hour: '2-digit', minute: '2-digit' }) : ''}
                        </div>
                      </div>
                    ))}
                    {liveTranscript && (
                      <div className={`${styles.message} ${styles.messageUser}`}>
                        <div className={`${styles.messageBubble} ${styles.messageLive}`}>{liveTranscript}</div>
                      </div>
                    )}
                    {coach.isStreaming && (
                      <div className={`${styles.message} ${styles.messageAssistant}`}>
                        <div className={styles.messageBubble}>
                          {coach.streamingMessage ? (
                            <ReactMarkdown remarkPlugins={[remarkGfm]}>{coach.streamingMessage}</ReactMarkdown>
                          ) : (
                            <div className={styles.typing}>{coach.streamingStatus || 'Coach denkt nach'}<span className={styles.typingDots}>...</span></div>
                          )}
                        </div>
                      </div>
                    )}
                  </div>
                </AutoScroll>

                {/* Input Area */}
                <div className={styles.inputArea}>
                  <div className={styles.voiceStatus}>
                    <span className={`${styles.voiceIndicator} ${isListening && !coach.isMuted ? styles.voiceActive : ''}`}>
                      {coach.isMuted
                        ? 'Stumm – Mikrofon aus'
                        : coach.isStreaming
                          ? (coach.streamingStatus || 'Coach antwortet...')
                          : isUserSpeaking
                            ? 'Spricht...'
                            : isListening
                              ? 'Mikrofon an – bitte sprechen'
                              : 'Mikrofon wird gestartet...'}
                    </span>
                  </div>
                  <div className={styles.textInputRow}>
                    <textarea
                      ref={inputRef}
                      className={styles.textInput}
                      placeholder="Nachricht eingeben..."
                      value={coach.inputValue}
                      onChange={e => coach.setInputValue(e.target.value)}
                      onKeyDown={handleKeyDown}
                      rows={1}
                      disabled={coach.isStreaming}
                    />
                    <button className={styles.sendBtn} onClick={handleSend} disabled={!coach.inputValue.trim() || coach.isStreaming}>
                      Senden
                    </button>
                  </div>
                </div>
              </>
            )}
            {coach.error && <div className={styles.errorBanner}>{coach.error}</div>}
          </div>
        )}

        {/* ============================================================ */}
        {/* TASKS TAB */}
        {/* ============================================================ */}
        {activeTab === 'tasks' && (
          <div className={styles.tabContent}>
            <div className={styles.addTaskRow}>
              <input
                className={styles.addTaskInput}
                placeholder="Neue Aufgabe..."
                value={newTaskTitle}
                onChange={e => setNewTaskTitle(e.target.value)}
                onKeyDown={e => e.key === 'Enter' && handleAddTask()}
              />
              <button className={styles.addTaskBtn} onClick={handleAddTask} disabled={!newTaskTitle.trim() || !!coach.actionLoading}>
                {coach.actionLoading === 'addingTask' ? 'Wird hinzugefügt...' : 'Hinzufügen'}
              </button>
            </div>
            {coach.tasks.length === 0 ? (
              <div className={styles.emptyTab}>Noch keine Aufgaben. Der Coach schlägt während Sessions Aufgaben vor.</div>
            ) : (
              <div className={styles.taskList}>
                {coach.tasks.map(task => (
                  <div key={task.id} className={`${styles.taskItem} ${task.status === 'done' ? styles.taskDone : ''}`}>
                    <button className={styles.taskCheck} onClick={() => coach.toggleTaskStatus(task.id, task.status)}>
                      {task.status === 'done' ? '\u2713' : '\u25CB'}
                    </button>
                    <div className={styles.taskContent}>
                      <div className={styles.taskTitle}>{task.title}</div>
                      {task.description && <div className={styles.taskDesc}>{task.description}</div>}
                    </div>
                    <div className={styles.taskMeta}>
                      <span className={`${styles.taskPriority} ${styles[`priority_${task.priority}`]}`}>{task.priority}</span>
                    </div>
                    <button className={styles.taskDelete} onClick={() => coach.removeTask(task.id)}>x</button>
                  </div>
                ))}
              </div>
            )}
          </div>
        )}

        {/* ============================================================ */}
        {/* SESSIONS TAB */}
        {/* ============================================================ */}
        {activeTab === 'sessions' && (
          <div className={styles.tabContent}>
            {coach.sessions.length === 0 ? (
              <div className={styles.emptyTab}>Noch keine abgeschlossenen Sessions.</div>
            ) : (
              <div className={styles.sessionTimeline}>
                {coach.sessions.map(s => (
                  <div key={s.id} className={styles.sessionItem}>
                    <div className={styles.sessionItemHeader}>
                      <span className={`${styles.sessionStatus} ${styles[`status_${s.status}`]}`}>
                        {s.status === 'completed' ? 'Abgeschlossen' : s.status === 'active' ? 'Aktiv' : 'Abgebrochen'}
                      </span>
                      <span className={styles.sessionDate}>{s.startedAt ? new Date(s.startedAt).toLocaleDateString('de-CH') : ''}</span>
                      {s.competenceScore != null && <span className={styles.sessionScore}>Score: {Math.round(s.competenceScore)}</span>}
                    </div>
                    {s.summary && (
                      <div className={styles.sessionSummary}><ReactMarkdown>{s.summary}</ReactMarkdown></div>
                    )}
                    <div className={styles.sessionMeta}>
                      {s.messageCount} Nachrichten | {Math.round(s.durationSeconds / 60)} Min.
                      {s.personaId && <span> | Persona</span>}
                      {instanceId && s.status === 'completed' && (
                        <a className={styles.sessionExport} href={getSessionExportUrl(instanceId, s.id, 'md')} target="_blank" rel="noopener noreferrer" onClick={e => e.stopPropagation()}>Export</a>
                      )}
                    </div>
                  </div>
                ))}
              </div>
            )}
          </div>
        )}

        {/* ============================================================ */}
        {/* SCORES TAB */}
        {/* ============================================================ */}
        {activeTab === 'scores' && (
          <div className={styles.tabContent}>
            {coach.scores.length === 0 ? (
              <div className={styles.emptyTab}>Noch keine Bewertungen. Schliesse eine Session ab, um Scores zu erhalten.</div>
            ) : (
              <div className={styles.scoreList}>
                {_groupScoresByDimension(coach.scores).map(group => (
                  <div key={group.dimension} className={styles.scoreGroup}>
                    <div className={styles.scoreDimension}>
                      <span className={styles.scoreDimensionLabel}>{_dimensionLabel(group.dimension)}</span>
                      <span className={styles.scoreLatest}>{Math.round(group.latest.score)}/100</span>
                      <span className={`${styles.scoreTrend} ${styles[`trend_${group.latest.trend}`]}`}>
                        {group.latest.trend === 'improving' ? 'steigend' : group.latest.trend === 'declining' ? 'sinkend' : 'stabil'}
                      </span>
                    </div>
                    <div className={styles.scoreBar}><div className={styles.scoreBarFill} style={{ width: `${group.latest.score}%` }} /></div>
                    {group.latest.evidence && <div className={styles.scoreEvidence}>{group.latest.evidence}</div>}
                    {scoreHistory[group.dimension] && scoreHistory[group.dimension].length > 1 && (
                      <div className={styles.scoreHistory}>
                        <div className={styles.scoreHistoryLabel}>Verlauf:</div>
                        <div className={styles.scoreHistoryPoints}>
                          {scoreHistory[group.dimension].map((entry, i) => (
                            <span key={i} className={styles.scoreHistoryPoint} title={entry.createdAt || ''}>{Math.round(entry.score)}</span>
                          ))}
                        </div>
                      </div>
                    )}
                  </div>
                ))}
              </div>
            )}
          </div>
        )}

        {/* ============================================================ */}
        {/* DOCUMENTS TAB */}
        {/* ============================================================ */}
        {activeTab === 'documents' && (
          <div className={styles.tabContent}>
            <div className={styles.addTaskRow}>
              <label className={styles.uploadLabel}>
                {uploading ? 'Wird hochgeladen...' : 'Dokument hochladen'}
                <input type="file" accept=".txt,.md,.pdf,.doc,.docx" onChange={handleUpload} disabled={uploading} style={{ display: 'none' }} />
              </label>
            </div>
            {documents.length === 0 ? (
              <div className={styles.emptyTab}>Keine Dokumente. Lade Dateien hoch oder bitte den Coach, eines zu erstellen.</div>
            ) : (
              <div className={styles.documentList}>
                {documents.map(doc => (
                  <div key={doc.id} className={styles.documentItem}>
                    <div className={styles.documentInfo}>
                      <div className={styles.documentName}>{doc.fileName}</div>
                      <div className={styles.documentMeta}>
                        {_formatFileSize(doc.fileSize)} | {doc.createdAt ? new Date(doc.createdAt).toLocaleDateString('de-CH') : ''}
                      </div>
                      {doc.summary && <div className={styles.documentSummary}>{doc.summary}</div>}
                    </div>
                    <div className={styles.documentActions}>
                      <button className={styles.btnExport} onClick={() => handleDownloadDocument(doc)} disabled={!doc.fileRef}>Download</button>
                      <button className={styles.taskDelete} onClick={() => handleDeleteDocument(doc.id)}>x</button>
                    </div>
                  </div>
                ))}
              </div>
            )}
          </div>
        )}
      </>)}
      {/* #region agent log */}
      <div style={{position:'fixed',bottom:0,right:0,zIndex:9999}}>
        <button
          onClick={() => { setDebugSnapshot([...debugLogsRef.current]); setDebugVisible(v => !v); }}
          style={{background:'#333',color:'#0f0',border:'none',padding:'4px 8px',fontSize:'10px',borderRadius:'4px 0 0 0'}}
        >DBG ({debugLogsRef.current.length})</button>
        {debugVisible && (
          <div style={{background:'rgba(0,0,0,0.9)',color:'#0f0',fontSize:'9px',maxHeight:'40vh',overflow:'auto',padding:'4px',fontFamily:'monospace',whiteSpace:'pre-wrap',width:'100vw'}}>
            {debugSnapshot.map((l,i) => <div key={i}>{l}</div>)}
          </div>
        )}
      </div>
      {/* #endregion */}
    </div>
  );
};

function _categoryIcon(category: string): string {
  const icons: Record<string, string> = {
    leadership: 'L', conflict: 'K', negotiation: 'V',
    presentation: 'P', feedback: 'F', delegation: 'D',
    changeManagement: 'C', custom: '*',
  };
  return icons[category] || '*';
}

function _tabLabel(tab: TabKey, coach: any, documents: CoachingDocument[]): string {
  switch (tab) {
    case 'coaching': return coach.session ? 'Coaching (aktiv)' : 'Coaching';
    case 'tasks': return `Aufgaben (${coach.tasks.length})`;
    case 'sessions': return `Sessions (${coach.sessions.length})`;
    case 'scores': return `Bewertungen (${coach.scores.length})`;
    case 'documents': return `Dokumente (${documents.length})`;
  }
}

interface ScoreGroup {
  dimension: string;
  latest: { score: number; trend: string; evidence?: string; createdAt?: string };
  history: Array<{ score: number; createdAt?: string }>;
}

function _groupScoresByDimension(scores: any[]): ScoreGroup[] {
  const groups: Record<string, ScoreGroup> = {};
  for (const s of scores) {
    const dim = s.dimension;
    if (!groups[dim]) groups[dim] = { dimension: dim, latest: s, history: [] };
    groups[dim].history.push({ score: s.score, createdAt: s.createdAt });
    if (s.createdAt > (groups[dim].latest.createdAt || '')) groups[dim].latest = s;
  }
  return Object.values(groups);
}

function _formatFileSize(bytes: number): string {
  if (bytes < 1024) return `${bytes} B`;
  if (bytes < 1024 * 1024) return `${Math.round(bytes / 1024)} KB`;
  return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
}

function _dimensionLabel(dim: string): string {
  const labels: Record<string, string> = {
    empathy: 'Einfühlungsvermögen', clarity: 'Klarheit',
    assertiveness: 'Durchsetzung', listening: 'Zuhören',
    selfReflection: 'Selbstreflexion',
  };
  return labels[dim] || dim;
}

export default CommcoachDossierView;