/**
 * ADAPTIVE MEMORY SYSTEM FOR FEDIVERSE CHATBOT
 * 
 * This system maintains persistent, evolving user profiles to enable personalized
 * interactions across chat sessions. It uses LLM-based analysis to extract and
 * categorize user traits, then builds context for future conversations.
 * 
 * ARCHITECTURE:
 * - UserMemory: Core profile (personality, gags, relationships, interests, backstory)
 * - InteractionLog: Historical conversation snapshots with sentiment analysis
 * - JSON string arrays in SQLite for flexible data storage
 * 
 * WORKFLOW:
 * 1. Each user message + bot response gets analyzed by Ollama
 * 2. Extract personality traits, running gags, relationship dynamics, etc.
 * 3. Merge new insights with existing profile (deduplication)
 * 4. Generate memory context string for next conversation's system prompt
 * 5. Log interaction with sentiment and notable quotes
 * 
 * MEMORY CATEGORIES:
 * - personalityTraits: User characteristics (sarcastic, protective, etc.)
 * - runningGags: Recurring jokes, memes, fake claims between user and bot
 * - relationships: How user treats bot (mean, protective, flirty)
 * - interests: Hobbies, topics user cares about
 * - backstory: Biographical info, "lore" (real or fabricated)
 * 
 * CURRENT LIMITATIONS:
 * - No memory aging/decay - old info persists indefinitely
 * - Simple deduplication - similar but not identical entries accumulate
 * - No relevance scoring - stale assumptions carry same weight as recent ones
 * - Fixed array limits may truncate important long-term patterns
 * 
 * RECOMMENDED IMPROVEMENTS:
 * - Add timestamp-based relevance weighting
 * - Implement semantic similarity checks for better deduplication
 * - Add contradiction detection to update outdated assumptions
 * - Consider LRU-style eviction instead of simple truncation
 */

// Updated memory.ts with JSON string handling for SQLite
import { prisma } from "./main.js";
import { envConfig } from "./main.js";
import { InteractionAnalysis, MemoryUpdateRequest, OllamaChatRequest, OllamaChatResponse } from "../types.js";

// Helper functions for JSON string array handling
const parseJsonArray = (jsonString: string): string[] => {
  try {
    const parsed = JSON.parse(jsonString);
    return Array.isArray(parsed) ? parsed : [];
  } catch {
    return [];
  }
};

const stringifyJsonArray = (array: string[]): string => {
  return JSON.stringify(array);
};

/**
 * Analyze a conversation to extract user personality, gags, and relationship dynamics
 */
const analyzeInteraction = async (
  userMessage: string, 
  botResponse: string, 
  userFqn: string
): Promise<InteractionAnalysis> => {
  const { ollamaUrl, ollamaModel } = envConfig;
  
  const analysisPrompt = `Analyze this conversation between a user and a cute female AI chatbot named Lexi. Extract personality traits, running gags, relationship dynamics, and interesting facts.

User (${userFqn}): ${userMessage}
Bot (Lexi): ${botResponse}

Please analyze and respond with a JSON object containing:
{
  "sentiment": "positive|negative|neutral|teasing|flirty|aggressive",
  "topics": ["topic1", "topic2"],
  "personalityObservations": ["trait1", "trait2"],
  "runningGagUpdates": ["gag1", "gag2"],
  "relationshipUpdates": ["relationship_change1"],
  "interestMentions": ["interest1", "interest2"],
  "backstoryElements": ["fact1", "fact2"],
  "memorableQuotes": ["quote1", "quote2"]
}

Focus on:
- Personality traits (sarcastic, teasing, protective, joker, etc.)
- Running gags and memes (fake claims, recurring jokes, etc.)
- How they treat the bot (mean, nice, flirty, protective)
- Interests and hobbies mentioned
- Any biographical info (real or fake "lore")
- Memorable or funny quotes

Keep entries brief and specific. Empty arrays are fine if nothing notable.`;

  try {
    const analysisRequest: OllamaChatRequest = {
      model: ollamaModel,
      messages: [
        { 
          role: "system", 
          content: "You are an expert at analyzing social interactions and extracting personality insights. Always respond with valid JSON only." 
        },
        { role: "user", content: analysisPrompt }
      ],
      stream: false,
      options: {
        temperature: 0.3, // Lower temperature for more consistent analysis
        num_predict: 800,
      }
    };

    const response = await fetch(`${ollamaUrl}/api/chat`, {
      method: "POST",
      body: JSON.stringify(analysisRequest),
    });

    if (!response.ok) {
      throw new Error(`Analysis request failed: ${response.statusText}`);
    }

    const analysisResponse: OllamaChatResponse = await response.json();
    
    try {
      // Parse the JSON response
      const analysis: InteractionAnalysis = JSON.parse(analysisResponse.message.content.trim());
      return analysis;
    } catch (parseError) {
      console.error("Failed to parse analysis JSON:", analysisResponse.message.content);
      // Return default analysis if parsing fails
      return {
        sentiment: 'neutral',
        topics: [],
        personalityObservations: [],
        runningGagUpdates: [],
        relationshipUpdates: [],
        interestMentions: [],
        backstoryElements: [],
        memorableQuotes: []
      };
    }
  } catch (error: any) {
    console.error(`Error analyzing interaction: ${error.message}`);
    return {
      sentiment: 'neutral',
      topics: [],
      personalityObservations: [],
      runningGagUpdates: [],
      relationshipUpdates: [],
      interestMentions: [],
      backstoryElements: [],
      memorableQuotes: []
    };
  }
};

/**
 * Get or create user memory profile
 */
const getUserMemory = async (userFqn: string) => {
  try {
    let memory = await prisma.userMemory.findUnique({
      where: { userFqn: userFqn }
    });

    if (!memory) {
      memory = await prisma.userMemory.create({
        data: {
          userFqn: userFqn,
          personalityTraits: stringifyJsonArray([]),
          runningGags: stringifyJsonArray([]),
          relationships: stringifyJsonArray([]),
          interests: stringifyJsonArray([]),
          backstory: stringifyJsonArray([]),
          lastInteractionSummary: null,
          interactionCount: 0,
        }
      });
    }

    return memory;
  } catch (error: any) {
    console.error(`Error getting user memory: ${error.message}`);
    return null;
  }
};

/**
 * Update user memory with new interaction insights
 */
const updateUserMemory = async (request: MemoryUpdateRequest): Promise<void> => {
  try {
    const { userFqn, conversationContent, botResponse, analysis } = request;
    
    // Get existing memory
    const existingMemory = await getUserMemory(userFqn);
    if (!existingMemory) return;

    // Parse existing JSON arrays
    const existingPersonality = parseJsonArray(existingMemory.personalityTraits);
    const existingGags = parseJsonArray(existingMemory.runningGags);
    const existingRelationships = parseJsonArray(existingMemory.relationships);
    const existingInterests = parseJsonArray(existingMemory.interests);
    const existingBackstory = parseJsonArray(existingMemory.backstory);

    // Merge new observations with existing ones (avoiding duplicates)
    const mergeArrays = (existing: string[], newItems: string[]): string[] => {
      const combined = [...existing, ...newItems];
      return [...new Set(combined)]; // Remove duplicates
    };

    // Limit array sizes to prevent memory bloat
    const limitArray = (arr: string[], maxSize: number = 20): string[] => {
      return arr.slice(-maxSize); // Keep most recent items
    };

    const updatedMemory = {
      personalityTraits: stringifyJsonArray(limitArray(mergeArrays(existingPersonality, analysis.personalityObservations))),
      runningGags: stringifyJsonArray(limitArray(mergeArrays(existingGags, analysis.runningGagUpdates))),
      relationships: stringifyJsonArray(limitArray(mergeArrays(existingRelationships, analysis.relationshipUpdates))),
      interests: stringifyJsonArray(limitArray(mergeArrays(existingInterests, analysis.interestMentions))),
      backstory: stringifyJsonArray(limitArray(mergeArrays(existingBackstory, analysis.backstoryElements))),
      lastInteractionSummary: `${analysis.sentiment} conversation about ${analysis.topics.join(', ') || 'general chat'}`,
      interactionCount: existingMemory.interactionCount + 1,
    };

    // Update database
    await prisma.userMemory.update({
      where: { userFqn: userFqn },
      data: updatedMemory
    });

    // Log the interaction for historical reference
    await prisma.interactionLog.create({
      data: {
        userFqn: userFqn,
        conversationSnapshot: `${userFqn}: ${conversationContent.slice(0, 200)}... | Lexi: ${botResponse.slice(0, 200)}...`,
        sentiment: analysis.sentiment,
        extractedTopics: stringifyJsonArray(analysis.topics),
        memorableQuotes: stringifyJsonArray(analysis.memorableQuotes),
        botEmotionalState: generateEmotionalState(analysis),
      }
    });

    console.log(`Updated memory for ${userFqn}: ${analysis.personalityObservations.join(', ')}`);
  } catch (error: any) {
    console.error(`Error updating user memory: ${error.message}`);
  }
};

/**
 * Generate how the bot should "feel" about this interaction
 */
const generateEmotionalState = (analysis: InteractionAnalysis): string => {
  const { sentiment, relationshipUpdates } = analysis;
  
  if (sentiment === 'teasing') return 'playfully_hurt';
  if (sentiment === 'flirty') return 'flustered';
  if (sentiment === 'aggressive') return 'sad';
  if (relationshipUpdates.some(rel => rel.includes('hurt') || rel.includes('mean'))) return 'hurt_feelings';
  if (relationshipUpdates.some(rel => rel.includes('cute') || rel.includes('sweet'))) return 'happy';
  return 'neutral';
};

/**
 * Generate memory context for system prompt
 */
const generateMemoryContext = async (userFqn: string): Promise<string> => {
  try {
    const memory = await getUserMemory(userFqn);
    if (!memory || memory.interactionCount === 0) {
      return "";
    }

    let context = `\n\n--- User Memory for ${userFqn} ---\n`;
    
    const personalityTraits = parseJsonArray(memory.personalityTraits);
    const runningGags = parseJsonArray(memory.runningGags);
    const relationships = parseJsonArray(memory.relationships);
    const interests = parseJsonArray(memory.interests);
    const backstory = parseJsonArray(memory.backstory);
    
    if (personalityTraits.length > 0) {
      context += `Personality: ${personalityTraits.join(', ')}\n`;
    }
    
    if (runningGags.length > 0) {
      context += `Running gags: ${runningGags.join(', ')}\n`;
    }
    
    if (relationships.length > 0) {
      context += `Our relationship: ${relationships.join(', ')}\n`;
    }
    
    if (interests.length > 0) {
      context += `Interests: ${interests.join(', ')}\n`;
    }
    
    if (backstory.length > 0) {
      context += `Background: ${backstory.join(', ')}\n`;
    }
    
    if (memory.lastInteractionSummary) {
      context += `Last time we talked: ${memory.lastInteractionSummary}\n`;
    }
    
    context += `Total conversations: ${memory.interactionCount}`;
    
    return context;
  } catch (error: any) {
    console.error(`Error generating memory context: ${error.message}`);
    return "";
  }
};

export {
  analyzeInteraction,
  updateUserMemory,
  getUserMemory,
  generateMemoryContext,
  parseJsonArray,
  stringifyJsonArray,
};