#!/usr/bin/env node

/**
 * Session Initialization Hook (PostSessionStart - NOT YET SUPPORTED by Claude Code)
 *
 * WORKAROUND: This hook is designed for PostSessionStart event (not yet available).
 * Current solution: Run via session-init.sh script explicitly.
 *
 * Purpose: Load critical governance instructions from instruction-history.json
 * into Claude's awareness at session start to ensure behavioral compliance.
 *
 * Exit Code: Always 0 (informational only, never blocks)
 */

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

async function main() {
  try {
    // Load instruction history from project
    const instructionPath = path.join(process.cwd(), '.claude', 'instruction-history.json');

    if (!fs.existsSync(instructionPath)) {
      console.log('\x1b[33m⚠️  No instruction-history.json found in this project\x1b[0m');
      process.exit(0);
    }

    const instructionData = JSON.parse(fs.readFileSync(instructionPath, 'utf-8'));
    const instructions = instructionData.instructions || [];

    // Filter for HIGH persistence and STRATEGIC quadrant (most critical)
    const criticalInstructions = instructions.filter(inst =>
      inst.active &&
      (inst.persistence === 'HIGH' || inst.quadrant === 'STRATEGIC')
    );

    if (criticalInstructions.length === 0) {
      console.log('\x1b[32m✓ No critical instructions to load\x1b[0m');
      process.exit(0);
    }

    // Display critical instructions
    console.log('\x1b[34m╔══════════════════════════════════════════════╗\x1b[0m');
    console.log('\x1b[34m║   CRITICAL GOVERNANCE INSTRUCTIONS          ║\x1b[0m');
    console.log('\x1b[34m╚══════════════════════════════════════════════╝\x1b[0m');
    console.log('');
    console.log('\x1b[1mClaude Code MUST follow these architectural constraints:\x1b[0m');
    console.log('');

    criticalInstructions.forEach((inst, index) => {
      console.log(`\x1b[36m${index + 1}. [${inst.id}] ${inst.title}\x1b[0m`);
      console.log(`   ${inst.description}`);
      console.log(`   Persistence: ${inst.persistence} | Category: ${inst.category}`);
      console.log('');
    });

    // Load behavioral rules from tractatus instruction database (if available)
    const tractatusInstructionPath = path.join(__dirname, '..', '..', '.claude', 'instruction-history.json');

    if (fs.existsSync(tractatusInstructionPath)) {
      const tractatusData = JSON.parse(fs.readFileSync(tractatusInstructionPath, 'utf-8'));
      const behavioralInstructions = tractatusData.instructions?.filter(inst =>
        inst.active &&
        inst.category === 'BEHAVIORAL' &&
        (inst.id === 'inst_047' || inst.id === 'inst_049' || inst.id === 'inst_052')
      ) || [];

      if (behavioralInstructions.length > 0) {
        console.log('\x1b[34m╔══════════════════════════════════════════════╗\x1b[0m');
        console.log('\x1b[34m║   BEHAVIORAL CONSTRAINTS                     ║\x1b[0m');
        console.log('\x1b[34m╚══════════════════════════════════════════════╝\x1b[0m');
        console.log('');

        behavioralInstructions.forEach((inst, index) => {
          console.log(`\x1b[31m${index + 1}. [${inst.id}] ${inst.title}\x1b[0m`);
          console.log(`   ${inst.description}`);
          console.log('');
        });
      }
    }

    console.log('\x1b[32m✓ Session initialization complete\x1b[0m');
    console.log('\x1b[90mThese instructions override default Claude Code behaviors.\x1b[0m');
    console.log('');

  } catch (err) {
    console.error('\x1b[31m✗ Session initialization failed:', err.message, '\x1b[0m');
  }

  process.exit(0);
}

main();