#!/usr/bin/env node
/**
 * Memory Service - NocoDB + Critic Integration
 * 
 * Provides:
 * - Structured memory storage (preferences, episodes, decisions)
 * - Correction store (self-correcting patterns)
 * - Validation logging
 */

const axios = require('axios');

class MemoryService {
  constructor(config = {}) {
    this.nocodbUrl = config.nocodbUrl || 'http://192.168.25.5:8080';
    this.nocodbToken = config.nocodbToken || process.env.NOCODB_TOKEN;
    this.projectId = config.projectId || 'default';
    
    // Table mappings (NocoDB table IDs)
    this.tables = {
      corrections: config.correctionsTable || 'corrections',
      preferences: config.preferencesTable || 'memory_preferences',
      episodes: config.episodesTable || 'memory_episodes',
      decisions: config.decisionsTable || 'memory_decisions',
      validation: config.validationTable || 'validation_runs'
    };
  }

  /**
   * Get HTTP client with auth
   */
  getClient() {
    return axios.create({
      baseURL: `${this.nocodbUrl}/api/v2/tables`,
      headers: {
        'xc-token': this.nocodbToken,
        'Content-Type': 'application/json'
      }
    });
  }

  // ============================================
  // CORRECTIONS API
  // ============================================

  /**
   * Load all active corrections
   */
  async loadCorrections() {
    const client = this.getClient();
    const response = await client.get(`/${this.tables.corrections}/records`, {
      params: {
        where: `(blocking,eq,true)`,
        limit: 1000
      }
    });
    return response.data.list;
  }

  /**
   * Store new correction
   */
  async storeCorrection(correction) {
    const client = this.getClient();
    
    const payload = {
      id: correction.id,
      pattern: correction.pattern,
      exclude_pattern: correction.excludePattern || null,
      severity: correction.severity,
      message: correction.message,
      suggestion: correction.suggestion,
      blocking: correction.blocking !== false,
      auto_detected: correction.autoDetected || true,
      manual_entry: correction.manualEntry || false,
      hit_count: 0,
      context: correction.context || 'unknown',
      created_at: new Date().toISOString(),
      updated_at: new Date().toISOString()
    };
    
    const response = await client.post(
      `/${this.tables.corrections}/records`,
      payload
    );
    
    return response.data;
  }

  /**
   * Increment hit count for correction
   */
  async incrementCorrectionHit(correctionId) {
    const client = this.getClient();
    
    // Get current hit count
    const current = await client.get(
      `/${this.tables.corrections}/records/${correctionId}`
    );
    
    const newCount = (current.data.hit_count || 0) + 1;
    
    await client.patch(
      `/${this.tables.corrections}/records/${correctionId}`,
      {
        hit_count: newCount,
        last_triggered: new Date().toISOString(),
        updated_at: new Date().toISOString()
      }
    );
    
    return newCount;
  }

  // ============================================
  // PREFERENCES API
  // ============================================

  /**
   * Get preferences by category
   */
  async getPreferences(category, minImportance = 5) {
    const client = this.getClient();
    
    const response = await client.get(`/${this.tables.preferences}/records`, {
      params: {
        where: `(category,eq,${category})~and(importance,gte,${minImportance})`,
        sort: '-importance,-access_count'
      }
    });
    
    return response.data.list;
  }

  /**
   * Store preference
   */
  async storePreference(pref) {
    const client = this.getClient();
    
    const payload = {
      id: pref.id,
      category: pref.category,
      key: pref.key,
      value: pref.value,
      importance: pref.importance || 5,
      confidence: pref.confidence || 1.0,
      tags: JSON.stringify(pref.tags || []),
      confirmed_count: pref.confirmedCount || 0,
      created_at: new Date().toISOString(),
      updated_at: new Date().toISOString()
    };
    
    const response = await client.post(
      `/${this.tables.preferences}/records`,
      payload
    );
    
    return response.data;
  }

  // ============================================
  // EPISODES API
  // ============================================

  /**
   * Store episodic memory
   */
  async storeEpisode(episode) {
    const client = this.getClient();
    
    const payload = {
      id: episode.id,
      date: episode.date || new Date().toISOString().split('T')[0],
      summary: episode.summary,
      details: episode.details,
      project: episode.project,
      outcomes: JSON.stringify(episode.outcomes || []),
      corrections_triggered: JSON.stringify(episode.correctionsTriggered || []),
      created_at: new Date().toISOString()
    };
    
    const response = await client.post(
      `/${this.tables.episodes}/records`,
      payload
    );
    
    return response.data;
  }

  // ============================================
  // DECISIONS API
  // ============================================

  /**
   * Store decision
   */
  async storeDecision(decision) {
    const client = this.getClient();
    
    const payload = {
      id: decision.id,
      date: decision.date || new Date().toISOString().split('T')[0],
      project: decision.project,
      decision: decision.decision,
      alternatives: JSON.stringify(decision.alternatives || []),
      rationale: decision.rationale,
      status: decision.status || 'active',
      created_at: new Date().toISOString()
    };
    
    const response = await client.post(
      `/${this.tables.decisions}/records`,
      payload
    );
    
    return response.data;
  }

  // ============================================
  // VALIDATION LOGGING
  // ============================================

  /**
   * Log validation run
   */
  async logValidation(run) {
    const client = this.getClient();
    
    const payload = {
      id: run.id,
      session_id: run.sessionId,
      timestamp: new Date().toISOString(),
      input_length: run.inputLength,
      output_length: run.outputLength,
      violations_found: run.violationsFound || 0,
      new_patterns_detected: run.newPatternsDetected || 0,
      corrections_auto_stored: run.correctionsAutoStored || 0,
      processing_time_ms: run.processingTimeMs,
      blocked: run.blocked || false,
      workflow: run.workflow
    };
    
    const response = await client.post(
      `/${this.tables.validation}/records`,
      payload
    );
    
    return response.data;
  }

  /**
   * Get validation statistics
   */
  async getValidationStats(days = 7) {
    const client = this.getClient();
    
    const response = await client.get(`/${this.tables.validation}/records`, {
      params: {
        where: `(timestamp,gte,${days} days ago})`,
        fields: 'blocked,violations_found,corrections_auto_stored'
      }
    });
    
    const runs = response.data.list;
    
    return {
      totalRuns: runs.length,
      blockedCount: runs.filter(r => r.blocked).length,
      totalViolations: runs.reduce((sum, r) => sum + (r.violations_found || 0), 0),
      totalAutoCorrections: runs.reduce((sum, r) => sum + (r.corrections_auto_stored || 0), 0),
      blockRate: runs.length > 0 ? (runs.filter(r => r.blocked).length / runs.length * 100).toFixed(1) : 0
    };
  }
}

// Export
module.exports = MemoryService;