import React, { useState, useEffect, useRef } from 'react';

const API_URL = 'http://localhost:8000';
const WS_URL = 'ws://localhost:8000';

function StorytellerView({ sessionId }) {
  const [characters, setCharacters] = useState({});
  const [publicMessages, setPublicMessages] = useState([]);
  const [selectedCharacter, setSelectedCharacter] = useState(null);
  const [responseText, setResponseText] = useState('');
  const [sceneText, setSceneText] = useState('');
  const [currentScene, setCurrentScene] = useState('');
  const [isConnected, setIsConnected] = useState(false);
  const [isGeneratingSuggestion, setIsGeneratingSuggestion] = useState(false);
  
  // Context-aware response state
  const [selectedCharacterIds, setSelectedCharacterIds] = useState([]);
  const [contextualResponseType, setContextualResponseType] = useState('scene');
  const [contextualAdditionalContext, setContextualAdditionalContext] = useState('');
  const [contextualModel, setContextualModel] = useState('gpt-4o');
  const [isGeneratingContextual, setIsGeneratingContextual] = useState(false);
  const [generatedContextualResponse, setGeneratedContextualResponse] = useState('');
  const [showContextualGenerator, setShowContextualGenerator] = useState(false);
  
  const wsRef = useRef(null);

  useEffect(() => {
    // Connect to WebSocket
    const ws = new WebSocket(`${WS_URL}/ws/storyteller/${sessionId}`);
    
    ws.onopen = () => {
      console.log('Storyteller connected to WebSocket');
      setIsConnected(true);
    };

    ws.onmessage = (event) => {
      const data = JSON.parse(event.data);
      
      if (data.type === 'session_state') {
        setCharacters(data.characters || {});
        setCurrentScene(data.current_scene || '');
        setPublicMessages(data.public_messages || []);
      } else if (data.type === 'character_message') {
        // Update character with new message
        setCharacters(prev => ({
          ...prev,
          [data.character_id]: {
            ...prev[data.character_id],
            conversation_history: [
              ...(prev[data.character_id]?.conversation_history || []),
              data.message
            ],
            pending_response: true
          }
        }));
      } else if (data.type === 'character_joined') {
        // Refresh character list
        fetch(`${API_URL}/sessions/${sessionId}`)
          .then(res => res.json())
          .then(session => {
            const charMap = {};
            Object.entries(session.characters).forEach(([id, char]) => {
              charMap[id] = {
                ...char,
                conversation_history: char.conversation_history || [],
                pending_response: char.pending_response || false
              };
            });
            setCharacters(charMap);
          });
      }
    };

    ws.onclose = () => {
      console.log('Storyteller disconnected from WebSocket');
      setIsConnected(false);
    };

    wsRef.current = ws;

    return () => {
      ws.close();
    };
  }, [sessionId]);

  const sendResponse = () => {
    if (!selectedCharacter || !responseText.trim() || !isConnected) return;

    const message = {
      type: 'respond_to_character',
      character_id: selectedCharacter,
      content: responseText
    };

    wsRef.current.send(JSON.stringify(message));
    
    // Update local state
    setCharacters(prev => ({
      ...prev,
      [selectedCharacter]: {
        ...prev[selectedCharacter],
        conversation_history: [
          ...(prev[selectedCharacter]?.conversation_history || []),
          { sender: 'storyteller', content: responseText, timestamp: new Date().toISOString() }
        ],
        pending_response: false
      }
    }));
    
    setResponseText('');
  };

  const narrateScene = () => {
    if (!sceneText.trim() || !isConnected) return;

    const message = {
      type: 'narrate_scene',
      content: sceneText
    };

    wsRef.current.send(JSON.stringify(message));
    setCurrentScene(sceneText);
    setSceneText('');
  };

  const getSuggestion = async () => {
    if (!selectedCharacter || isGeneratingSuggestion) return;
    
    setIsGeneratingSuggestion(true);
    try {
      const response = await fetch(
        `${API_URL}/sessions/${sessionId}/generate_suggestion?character_id=${selectedCharacter}`,
        { method: 'POST' }
      );
      
      if (!response.ok) {
        throw new Error('Failed to generate suggestion');
      }
      
      const data = await response.json();
      setResponseText(data.suggestion);
    } catch (error) {
      console.error('Error generating suggestion:', error);
      alert('Failed to generate AI suggestion. Please try again.');
    } finally {
      setIsGeneratingSuggestion(false);
    }
  };

  // Toggle character selection for contextual response
  const toggleCharacterSelection = (charId) => {
    setSelectedCharacterIds(prev => 
      prev.includes(charId) 
        ? prev.filter(id => id !== charId)
        : [...prev, charId]
    );
  };

  // Select all characters with pending messages
  const selectAllPending = () => {
    const pendingIds = Object.entries(characters)
      .filter(([_, char]) => char.pending_response)
      .map(([id, _]) => id);
    setSelectedCharacterIds(pendingIds);
  };

  // Generate contextual response
  const generateContextualResponse = async () => {
    if (selectedCharacterIds.length === 0 || isGeneratingContextual) return;
    
    setIsGeneratingContextual(true);
    setGeneratedContextualResponse('');
    
    try {
      const response = await fetch(
        `${API_URL}/sessions/${sessionId}/generate_contextual_response`,
        {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({
            character_ids: selectedCharacterIds,
            response_type: contextualResponseType,
            model: contextualModel,
            additional_context: contextualAdditionalContext || null
          })
        }
      );
      
      if (!response.ok) {
        throw new Error('Failed to generate contextual response');
      }
      
      const data = await response.json();
      
      // If individual responses were sent, show confirmation
      if (data.response_type === 'individual' && data.individual_responses_sent) {
        const sentCount = Object.keys(data.individual_responses_sent).length;
        const sentNames = Object.keys(data.individual_responses_sent).join(', ');
        
        if (sentCount > 0) {
          alert(`✅ Individual responses sent to ${sentCount} character(s): ${sentNames}\n\nThe responses have been delivered privately to each character.`);
          
          // Clear selections after successful send
          setSelectedCharacterIds([]);
          setContextualAdditionalContext('');
          
          // Update character states to reflect no pending responses
          setCharacters(prev => {
            const updated = { ...prev };
            Object.keys(data.individual_responses_sent).forEach(charName => {
              const charEntry = Object.entries(updated).find(([_, char]) => char.name === charName);
              if (charEntry) {
                const [charId, char] = charEntry;
                updated[charId] = { ...char, pending_response: false };
              }
            });
            return updated;
          });
        }
        
        // Still show the full generated response for reference
        setGeneratedContextualResponse(data.response);
      } else {
        // Scene description - just show the response
        setGeneratedContextualResponse(data.response);
      }
    } catch (error) {
      console.error('Error generating contextual response:', error);
      alert('Failed to generate contextual response. Please try again.');
    } finally {
      setIsGeneratingContextual(false);
    }
  };

  // Use generated response as scene
  const useAsScene = () => {
    if (!generatedContextualResponse) return;
    setSceneText(generatedContextualResponse);
    setShowContextualGenerator(false);
  };

  // Copy session ID to clipboard
  const copySessionId = () => {
    navigator.clipboard.writeText(sessionId).then(() => {
      alert('✅ Session ID copied to clipboard!');
    }).catch(err => {
      console.error('Failed to copy:', err);
      alert('Failed to copy session ID. Please copy it manually.');
    });
  };

  const selectedChar = selectedCharacter ? characters[selectedCharacter] : null;
  const pendingCount = Object.values(characters).filter(c => c.pending_response).length;

  return (
    <div className="storyteller-view">
      <div className="storyteller-header">
        <div>
          <h1>🎲 Storyteller Dashboard</h1>
          <div className="session-id-container">
            <p className="session-id">
              Session ID: <code>{sessionId}</code>
            </p>
            <button className="btn-copy" onClick={copySessionId} title="Copy Session ID">
              📋 Copy
            </button>
          </div>
          <p className="connection-status">
            <span className={`status-indicator ${isConnected ? 'connected' : 'disconnected'}`}>
              {isConnected ? '● Connected' : '○ Disconnected'}
            </span>
          </p>
        </div>
        {pendingCount > 0 && (
          <div className="pending-badge">
            {pendingCount} pending response{pendingCount !== 1 ? 's' : ''}
          </div>
        )}
      </div>

      <div className="scene-section">
        <h3>📜 Narrate Scene to All Characters</h3>
        {currentScene && (
          <div className="current-scene-display">
            <strong>Current Scene:</strong> {currentScene}
          </div>
        )}
        <div className="scene-input">
          <textarea
            placeholder="Describe the scene that all characters will experience..."
            value={sceneText}
            onChange={(e) => setSceneText(e.target.value)}
            rows="3"
          />
          <button className="btn-primary" onClick={narrateScene} disabled={!isConnected}>
            Narrate Scene
          </button>
        </div>
        
        {publicMessages.length > 0 && (
          <div className="public-feed">
            <h4>📢 Public Actions Feed ({publicMessages.length})</h4>
            <div className="public-messages-list">
              {publicMessages.slice(-5).map((msg, idx) => (
                <div key={idx} className="public-message-item">
                  <span className="public-msg-content">
                    {msg.visibility === 'mixed' && msg.public_content ? msg.public_content : msg.content}
                  </span>
                  <span className="public-msg-time">
                    {new Date(msg.timestamp).toLocaleTimeString()}
                  </span>
                </div>
              ))}
            </div>
          </div>
        )}
      </div>

      {/* Contextual Response Generator */}
      <div className="contextual-section">
        <div className="contextual-header">
          <h3>🧠 AI Context-Aware Response Generator</h3>
          <button 
            className="btn-secondary" 
            onClick={() => setShowContextualGenerator(!showContextualGenerator)}
          >
            {showContextualGenerator ? '▼ Hide' : '▶ Show'} Generator
          </button>
        </div>
        
        {showContextualGenerator && (
          <div className="contextual-generator">
            <p className="contextual-description">
              Generate a response that takes into account multiple characters' actions and messages. 
              Perfect for creating scenes or responses that incorporate everyone's contributions.
            </p>
            
            {/* Character Selection */}
            <div className="character-selection">
              <div className="selection-header">
                <h4>Select Characters to Include:</h4>
                <button className="btn-small" onClick={selectAllPending} disabled={pendingCount === 0}>
                  Select All Pending ({pendingCount})
                </button>
              </div>
              
              <div className="character-checkboxes">
                {Object.entries(characters).map(([id, char]) => (
                  <label key={id} className={`character-checkbox ${char.pending_response ? 'has-pending' : ''}`}>
                    <input
                      type="checkbox"
                      checked={selectedCharacterIds.includes(id)}
                      onChange={() => toggleCharacterSelection(id)}
                    />
                    <span className="checkbox-label">
                      {char.name}
                      {char.pending_response && <span className="pending-badge-small">●</span>}
                      <span className="message-count">({char.conversation_history?.length || 0} msgs)</span>
                    </span>
                  </label>
                ))}
              </div>
              
              {selectedCharacterIds.length > 0 && (
                <div className="selection-summary">
                  Selected: {selectedCharacterIds.map(id => characters[id]?.name).join(', ')}
                </div>
              )}
            </div>
            
            {/* Response Type */}
            <div className="response-type-selector">
              <label>
                <strong>Response Type:</strong>
                <select 
                  value={contextualResponseType} 
                  onChange={(e) => setContextualResponseType(e.target.value)}
                >
                  <option value="scene">Scene Description (broadcast to all)</option>
                  <option value="individual">Individual Responses (sent privately to each character)</option>
                </select>
              </label>
              {contextualResponseType === 'individual' && (
                <p className="response-type-help">
                  💡 The AI will generate responses in this format: <code>[CharacterName] Response text here</code>. Each response is automatically parsed and sent privately to the respective character.
                </p>
              )}
            </div>
            
            {/* Model Selection */}
            <div className="model-selector-contextual">
              <label>
                <strong>LLM Model:</strong>
                <select 
                  value={contextualModel} 
                  onChange={(e) => setContextualModel(e.target.value)}
                >
                  <option value="gpt-4o">GPT-4o (Latest)</option>
                  <option value="gpt-4-turbo">GPT-4 Turbo</option>
                  <option value="gpt-4">GPT-4</option>
                  <option value="gpt-3.5-turbo">GPT-3.5 Turbo</option>
                </select>
              </label>
            </div>
            
            {/* Additional Context */}
            <div className="additional-context">
              <label>
                <strong>Additional Context (optional):</strong>
                <textarea
                  placeholder="Add any extra information or guidance for the AI (e.g., 'Make it dramatic', 'They should encounter danger', etc.)"
                  value={contextualAdditionalContext}
                  onChange={(e) => setContextualAdditionalContext(e.target.value)}
                  rows="2"
                />
              </label>
            </div>
            
            {/* Generate Button */}
            <button 
              className="btn-primary btn-large" 
              onClick={generateContextualResponse}
              disabled={selectedCharacterIds.length === 0 || isGeneratingContextual || !isConnected}
            >
              {isGeneratingContextual ? '⏳ Generating...' : '✨ Generate Context-Aware Response'}
            </button>
            
            {/* Generated Response */}
            {generatedContextualResponse && (
              <div className="generated-response">
                <h4>Generated Response:</h4>
                <div className="response-content">
                  {generatedContextualResponse}
                </div>
                <div className="response-actions">
                  <button className="btn-primary" onClick={useAsScene}>
                    Use as Scene
                  </button>
                  <button className="btn-secondary" onClick={() => setGeneratedContextualResponse('')}>
                    Clear
                  </button>
                </div>
              </div>
            )}
          </div>
        )}
      </div>

      <div className="storyteller-content">
        <div className="character-list">
          <h3>Characters ({Object.keys(characters).length})</h3>
          {Object.keys(characters).length === 0 ? (
            <div className="empty-state">
              <p>No characters yet. Share the session ID for players to join!</p>
            </div>
          ) : (
            <div className="character-cards">
              {Object.entries(characters).map(([id, char]) => (
                <div
                  key={id}
                  className={`character-card ${selectedCharacter === id ? 'selected' : ''} ${char.pending_response ? 'pending' : ''}`}
                  onClick={() => setSelectedCharacter(id)}
                >
                  <div className="character-card-header">
                    <h4>{char.name}</h4>
                    {char.pending_response && <span className="pending-indicator">●</span>}
                  </div>
                  <p className="character-card-desc">{char.description}</p>
                  {char.personality && <p className="character-card-personality">🎭 {char.personality}</p>}
                  {char.llm_model && <p className="character-card-model">🤖 {char.llm_model}</p>}
                  <p className="character-card-messages">
                    {char.conversation_history?.length || 0} message{char.conversation_history?.length !== 1 ? 's' : ''}
                  </p>
                </div>
              ))}
            </div>
          )}
        </div>

        <div className="conversation-panel">
          {selectedChar ? (
            <>
              <div className="panel-header">
                <h3>Conversation with {selectedChar.name}</h3>
                {selectedChar.pending_response && (
                  <span className="pending-label">Awaiting Response</span>
                )}
              </div>
              
              <div className="conversation-messages">
                {selectedChar.conversation_history?.length === 0 ? (
                  <div className="empty-state">
                    <p>No conversation yet with this character.</p>
                  </div>
                ) : (
                  selectedChar.conversation_history?.map((msg, index) => (
                    <div key={index} className={`message ${msg.sender === 'character' ? 'from-character' : 'from-storyteller'}`}>
                      <div className="message-header">
                        <span className="message-sender">
                          {msg.sender === 'character' ? selectedChar.name : 'You (Storyteller)'}
                        </span>
                        <span className="message-time">
                          {new Date(msg.timestamp).toLocaleTimeString()}
                        </span>
                      </div>
                      <div className="message-content">{msg.content}</div>
                    </div>
                  ))
                )}
              </div>

              <div className="response-section">
                <h4>Respond to {selectedChar.name}</h4>
                <textarea
                  placeholder={`Craft your response to ${selectedChar.name}. This is private and only they will see it.`}
                  value={responseText}
                  onChange={(e) => setResponseText(e.target.value)}
                  rows="4"
                />
                <div className="response-buttons">
                  <button 
                    className="btn-secondary" 
                    onClick={getSuggestion} 
                    disabled={!isConnected || isGeneratingSuggestion}
                  >
                    {isGeneratingSuggestion ? '⏳ Generating...' : '✨ AI Suggest'}
                  </button>
                  <button className="btn-primary" onClick={sendResponse} disabled={!isConnected}>
                    Send Private Response
                  </button>
                </div>
              </div>
            </>
          ) : (
            <div className="empty-state">
              <p>Select a character to view their conversation and respond</p>
            </div>
          )}
        </div>
      </div>
    </div>
  );
}

export default StorytellerView;