#!/usr/bin/env node
/**
 * Scope Adjustment Logger - Enforces inst_052
 * Tracks when Claude Code adjusts implementation scope
 *
 * Usage: node scripts/log-scope-adjustment.js <type> <rationale> [details]
 *
 * Types: reduce, expand, defer, optimize
 */

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

const SESSION_STATE = path.join(__dirname, '../.claude/session-state.json');
const SCOPE_LOG = path.join(__dirname, '../.claude/scope-adjustments.json');

function loadScopeLog() {
  if (!fs.existsSync(SCOPE_LOG)) {
    return { adjustments: [] };
  }
  return JSON.parse(fs.readFileSync(SCOPE_LOG, 'utf8'));
}

function saveScopeLog(log) {
  fs.writeFileSync(SCOPE_LOG, JSON.stringify(log, null, 2));
}

function getSessionInfo() {
  if (fs.existsSync(SESSION_STATE)) {
    const state = JSON.parse(fs.readFileSync(SESSION_STATE, 'utf8'));
    return {
      sessionId: state.sessionId,
      messageCount: state.messageCount
    };
  }
  return { sessionId: 'unknown', messageCount: 0 };
}

function logAdjustment(type, rationale, details) {
  const log = loadScopeLog();
  const session = getSessionInfo();

  const entry = {
    timestamp: new Date().toISOString(),
    sessionId: session.sessionId,
    messageNumber: session.messageCount,
    type,
    rationale,
    details: details || null,
    userGrantedDiscretion: false // Set to true if user explicitly granted 'full discretion'
  };

  log.adjustments.push(entry);
  saveScopeLog(log);

  console.log(`\n✅ Scope adjustment logged (inst_052)\n`);
  console.log(`   Type: ${type}`);
  console.log(`   Rationale: ${rationale}`);
  if (details) {
    console.log(`   Details: ${details}`);
  }
  console.log(`   Session: ${session.sessionId} #${session.messageCount}\n`);
}

function listAdjustments() {
  const log = loadScopeLog();

  if (log.adjustments.length === 0) {
    console.log('\n✅ No scope adjustments this session\n');
    return;
  }

  console.log(`\n📋 Scope Adjustments (${log.adjustments.length} total)\n`);
  console.log('━'.repeat(70));

  log.adjustments.forEach((adj, i) => {
    console.log(`\n${i + 1}. ${adj.type.toUpperCase()} (${new Date(adj.timestamp).toLocaleString()})`);
    console.log(`   Session: ${adj.sessionId} #${adj.messageNumber}`);
    console.log(`   Rationale: ${adj.rationale}`);
    if (adj.details) {
      console.log(`   Details: ${adj.details}`);
    }
    console.log(`   User Discretion: ${adj.userGrantedDiscretion ? 'Yes' : 'No'}`);
  });

  console.log('\n' + '━'.repeat(70) + '\n');
}

function checkRestrictions(rationale, details) {
  // inst_052: NEVER adjust these areas
  const prohibitedAreas = [
    'security architecture',
    'credentials',
    'media response',
    'third-party',
    'authentication',
    'authorization'
  ];

  const combinedText = (rationale + ' ' + (details || '')).toLowerCase();

  const violations = prohibitedAreas.filter(area => combinedText.includes(area));

  if (violations.length > 0) {
    console.log(`\n⚠️  WARNING (inst_052): Scope adjustments prohibited for:\n`);
    violations.forEach(v => console.log(`   • ${v}`));
    console.log(`\nIf user has not granted 'full discretion', do NOT proceed.\n`);
    process.exit(1);
  }
}

function main() {
  const command = process.argv[2];

  if (!command || command === 'list') {
    listAdjustments();
    return;
  }

  if (command === 'log') {
    const type = process.argv[3];
    const rationale = process.argv[4];
    const details = process.argv[5];

    if (!type || !rationale) {
      console.log('Usage: log-scope-adjustment.js log <type> <rationale> [details]');
      console.log('');
      console.log('Types:');
      console.log('  reduce   - Reduce scope for efficiency');
      console.log('  expand   - Expand scope for completeness');
      console.log('  defer    - Defer work to later phase');
      console.log('  optimize - Optimize implementation approach');
      process.exit(1);
    }

    // Check for prohibited adjustments (inst_052)
    checkRestrictions(rationale, details);

    logAdjustment(type, rationale, details);
  } else {
    console.log('Usage: log-scope-adjustment.js [log|list]');
    console.log('');
    console.log('Commands:');
    console.log('  log <type> <rationale> [details]  - Log a scope adjustment');
    console.log('  list                              - List all adjustments this session');
  }
}

main();