#!/usr/bin/env node

/**
 * Framework Health Metrics Dashboard
 *
 * Automated health report for Tractatus framework showing:
 * - Component status and activity
 * - Instruction database health
 * - Token checkpoint status
 * - Hook validator metrics
 * - Recent incident trends
 * - Overall health score
 *
 * Copyright 2025 Tractatus Project
 * Licensed under Apache License 2.0
 */

const fs = require('fs');
const path = require('path');

// Paths
const SESSION_STATE_PATH = path.join(__dirname, '../.claude/session-state.json');
const INSTRUCTION_HISTORY_PATH = path.join(__dirname, '../.claude/instruction-history.json');
const TOKEN_CHECKPOINTS_PATH = path.join(__dirname, '../.claude/token-checkpoints.json');
const METRICS_PATH = path.join(__dirname, '../.claude/metrics/hooks-metrics.json');
const INCIDENTS_DIR = path.join(__dirname, '../docs/framework-incidents');

const colors = {
  reset: '\x1b[0m',
  bright: '\x1b[1m',
  green: '\x1b[32m',
  yellow: '\x1b[33m',
  blue: '\x1b[34m',
  red: '\x1b[31m',
  cyan: '\x1b[36m'
};

function log(message, color = 'reset') {
  console.log(`${colors[color]}${message}${colors.reset}`);
}

function header(message) {
  console.log('');
  log('═'.repeat(70), 'cyan');
  log(`  ${message}`, 'bright');
  log('═'.repeat(70), 'cyan');
  console.log('');
}

function section(message) {
  console.log('');
  log(`▶ ${message}`, 'blue');
}

function success(message) {
  log(`  ✓ ${message}`, 'green');
}

function warning(message) {
  log(`  ⚠ ${message}`, 'yellow');
}

function error(message) {
  log(`  ✗ ${message}`, 'red');
}

function loadJSON(filepath) {
  try {
    if (!fs.existsSync(filepath)) {
      return null;
    }
    return JSON.parse(fs.readFileSync(filepath, 'utf8'));
  } catch (err) {
    return null;
  }
}

function calculateHealthScore(metrics) {
  let score = 100;
  const issues = [];

  // Component activity (20 points)
  const activeComponents = metrics.components.filter(c => c.validations > 0).length;
  const componentScore = (activeComponents / metrics.components.length) * 20;
  score = Math.min(score, score - (20 - componentScore));
  if (componentScore < 10) {
    issues.push(`Low component activity: ${activeComponents}/${metrics.components.length} components used`);
  }

  // Instruction database health (20 points)
  if (metrics.instructions.active > 60) {
    score -= 10;
    issues.push(`Too many active instructions: ${metrics.instructions.active} (target: <50)`);
  }
  if (metrics.instructions.highPersistence < 80) {
    score -= 10;
    issues.push(`Low HIGH persistence ratio: ${metrics.instructions.highPersistence.toFixed(1)}%`);
  }

  // Token checkpoint compliance (15 points)
  const missedCheckpoints = metrics.checkpoints.total - metrics.checkpoints.completed;
  if (metrics.checkpoints.overdue) {
    score -= 15;
    issues.push(`Token checkpoints overdue: ${missedCheckpoints} missed`);
  }

  // Hook validator effectiveness (15 points)
  if (metrics.hooks.totalExecutions === 0) {
    score -= 15;
    issues.push('No hook validations recorded');
  } else {
    const blockRate = metrics.hooks.totalBlocks / metrics.hooks.totalExecutions;
    if (blockRate > 0.2) {
      score -= 5;
      issues.push(`High hook block rate: ${(blockRate * 100).toFixed(1)}% (may indicate issues)`);
    }
  }

  // Recent incidents (30 points)
  const recentIncidents = metrics.incidents.recent30Days;
  if (recentIncidents >= 5) {
    score -= 20;
    issues.push(`High incident rate: ${recentIncidents} in last 30 days`);
  } else if (recentIncidents >= 3) {
    score -= 10;
    issues.push(`Moderate incident rate: ${recentIncidents} in last 30 days`);
  }

  return {
    score: Math.max(0, score),
    grade: score >= 90 ? 'A' : score >= 80 ? 'B' : score >= 70 ? 'C' : score >= 60 ? 'D' : 'F',
    issues
  };
}

function main() {
  header('Framework Health Metrics Dashboard');

  const metrics = {
    components: [],
    instructions: {},
    checkpoints: {},
    hooks: {},
    incidents: {}
  };

  // 1. Component Status
  section('1. Framework Component Activity');

  const sessionState = loadJSON(SESSION_STATE_PATH);
  if (sessionState && sessionState.framework_components) {
    const components = [
      'ContextPressureMonitor',
      'InstructionPersistenceClassifier',
      'CrossReferenceValidator',
      'BoundaryEnforcer',
      'MetacognitiveVerifier',
      'PluralisticDeliberationOrchestrator',
      'BashCommandValidator'
    ];

    components.forEach(name => {
      const component = sessionState.framework_components[name];
      if (component) {
        const validations = component.validations_performed || 0;
        const status = validations > 0 ? 'ACTIVE' : 'READY';
        const color = validations > 0 ? 'green' : 'yellow';

        log(`  ${name}:`, 'cyan');
        log(`    Status: ${status} (${validations} validations)`, color);

        metrics.components.push({ name, status, validations });
      }
    });
  } else {
    warning('Session state not found - run: node scripts/session-init.js');
  }

  // 2. Instruction Database Health
  section('2. Instruction Database Health');

  const instructionHistory = loadJSON(INSTRUCTION_HISTORY_PATH);
  if (instructionHistory) {
    const active = instructionHistory.instructions.filter(i => i.active);
    const inactive = instructionHistory.instructions.filter(i => !i.active);
    const highPersistence = active.filter(i => i.persistence === 'HIGH');

    log(`  Total instructions: ${instructionHistory.instructions.length}`, 'cyan');
    log(`  Active: ${active.length}`, active.length < 50 ? 'green' : 'yellow');
    log(`  Inactive: ${inactive.length}`, 'cyan');
    log(`  HIGH persistence: ${highPersistence.length} (${(highPersistence.length/active.length*100).toFixed(1)}%)`, 'cyan');
    log(`  Database version: ${instructionHistory.version}`, 'cyan');

    if (active.length < 50) {
      success('✓ Instruction count optimal (<50)');
    } else {
      warning(`⚠ Instruction count high: ${active.length} (target: <50)`);
    }

    metrics.instructions = {
      total: instructionHistory.instructions.length,
      active: active.length,
      inactive: inactive.length,
      highPersistence: (highPersistence.length / active.length) * 100
    };
  }

  // 3. Token Checkpoint Status
  section('3. Token Checkpoint Status');

  const checkpoints = loadJSON(TOKEN_CHECKPOINTS_PATH);
  if (checkpoints) {
    const completed = checkpoints.checkpoints.filter(c => c.completed).length;
    const total = checkpoints.checkpoints.length;

    log(`  Budget: ${checkpoints.budget.toLocaleString()} tokens`, 'cyan');
    log(`  Checkpoints completed: ${completed}/${total}`, completed === total ? 'green' : 'yellow');
    log(`  Next checkpoint: ${checkpoints.next_checkpoint ? checkpoints.next_checkpoint.toLocaleString() + ' tokens' : 'All complete'}`, 'cyan');

    if (checkpoints.overdue) {
      warning('⚠ Checkpoint overdue - run: node scripts/check-token-checkpoint.js');
    } else {
      success('✓ Checkpoint monitoring current');
    }

    metrics.checkpoints = {
      total,
      completed,
      overdue: checkpoints.overdue
    };
  }

  // 4. Hook Validator Metrics
  section('4. Hook Validator Metrics');

  const hooksMetrics = loadJSON(METRICS_PATH);
  if (hooksMetrics && hooksMetrics.session_stats) {
    const stats = hooksMetrics.session_stats;

    log(`  Total hook executions: ${stats.total_bash_hooks || 0}`, 'cyan');
    log(`  Blocks issued: ${stats.total_bash_blocks || 0}`, 'cyan');

    const blockRate = stats.total_bash_hooks > 0
      ? ((stats.total_bash_blocks / stats.total_bash_hooks) * 100).toFixed(1)
      : 0;
    log(`  Block rate: ${blockRate}%`, parseFloat(blockRate) < 10 ? 'green' : 'yellow');

    success('✓ Hook validators operational');

    metrics.hooks = {
      totalExecutions: stats.total_bash_hooks || 0,
      totalBlocks: stats.total_bash_blocks || 0
    };
  } else {
    log(`  No hook metrics available yet`, 'yellow');
    metrics.hooks = { totalExecutions: 0, totalBlocks: 0 };
  }

  // 5. Recent Incidents
  section('5. Recent Framework Incidents');

  if (fs.existsSync(INCIDENTS_DIR)) {
    const incidents = fs.readdirSync(INCIDENTS_DIR)
      .filter(f => f.endsWith('.md'))
      .map(f => {
        const filepath = path.join(INCIDENTS_DIR, f);
        const stats = fs.statSync(filepath);
        return { file: f, date: stats.mtime };
      })
      .sort((a, b) => b.date - a.date);

    const thirtyDaysAgo = new Date(Date.now() - 30 * 24 * 60 * 60 * 1000);
    const recent = incidents.filter(i => i.date > thirtyDaysAgo);

    log(`  Total incidents: ${incidents.length}`, 'cyan');
    log(`  Last 30 days: ${recent.length}`, recent.length === 0 ? 'green' : recent.length < 3 ? 'yellow' : 'red');

    if (recent.length > 0) {
      console.log('');
      log(`  Most recent:`, 'bold');
      recent.slice(0, 3).forEach(i => {
        const daysAgo = Math.floor((Date.now() - i.date.getTime()) / (1000 * 60 * 60 * 24));
        log(`    - ${i.file} (${daysAgo} days ago)`, 'cyan');
      });
    } else {
      success('✓ No incidents in last 30 days');
    }

    metrics.incidents = {
      total: incidents.length,
      recent30Days: recent.length
    };
  } else {
    metrics.incidents = { total: 0, recent30Days: 0 };
  }

  // 6. Overall Health Score
  section('6. Overall Framework Health');

  const health = calculateHealthScore(metrics);

  console.log('');
  const scoreColor = health.score >= 90 ? 'green' : health.score >= 70 ? 'yellow' : 'red';
  log(`  Health Score: ${health.score}/100 (Grade: ${health.grade})`, scoreColor);

  if (health.issues.length === 0) {
    console.log('');
    success('✓ No issues detected - framework operating optimally');
  } else {
    console.log('');
    log(`  Issues Identified (${health.issues.length}):`, 'yellow');
    health.issues.forEach(issue => {
      warning(issue);
    });
  }

  console.log('');
  log('═'.repeat(70), 'cyan');

  if (health.score >= 90) {
    success('Framework Status: EXCELLENT');
  } else if (health.score >= 70) {
    warning('Framework Status: GOOD (minor improvements recommended)');
  } else {
    error('Framework Status: NEEDS ATTENTION');
  }

  log('═'.repeat(70), 'cyan');
  console.log('');
}

main();