#!/usr/bin/env node
/**
 * Stop Hook 追加: 宪法违规会话摘要
 * 读取 debug/detection-stats.json 中当天的违规统计
 * 输出到 debug/constitution-report.jsonl
 *
 * Fail-open: 异常 → exit(0)
 */

const fs = require('fs');
const path = require('path');
const { safeAppendJsonl } = require('./lib/safe-append.js');


function main() {
  try {
    const root = require('./lib/root.js');
    const debugDir = path.join(root, 'debug');
    const statsFile = path.join(debugDir, 'detection-stats.json');
    const reportFile = path.join(debugDir, 'constitution-report.jsonl');
    const reminderFile = path.join(debugDir, 'constitution-reminder-session.json');

    const today = new Date().toISOString().slice(0, 10);
    let todayViolations = 0;
    let ruleBreakdown = {};

    // 从 detection-stats.json 读取当日统计
    if (fs.existsSync(statsFile)) {
      try {
        const stats = JSON.parse(fs.readFileSync(statsFile, 'utf8'));
        todayViolations = (stats.dailyTotals || {})[today] || 0;
        for (const [ruleId, ruleData] of Object.entries(stats.rules || {})) {
          const todayCount = (ruleData.last7days || {})[today] || 0;
          if (todayCount > 0) {
            ruleBreakdown[ruleId] = todayCount;
          }
        }
      } catch {}
    }

    // 从 constitution-reminder-session.json 读取提醒统计
    let filesReminded = 0;
    if (fs.existsSync(reminderFile)) {
      try {
        const session = JSON.parse(fs.readFileSync(reminderFile, 'utf8'));
        filesReminded = (session.reminded || []).length;
      } catch {}
    }

    // 如果今天有违规或提醒，记录到报告
    if (todayViolations > 0 || filesReminded > 0) {
      const entry = {
        ts: new Date().toISOString(),
        date: today,
        violations: todayViolations,
        ruleBreakdown,
        filesReminded,
      };

      safeAppendJsonl(reportFile, entry);
    }

    // 清理提醒会话文件 (Stop 时重置)
    if (fs.existsSync(reminderFile)) {
      try { fs.unlinkSync(reminderFile); } catch {}
    }
  } catch {}

  process.exit(0);
}

/**
 * 可导出的会话报告生成函数 (供 dispatcher 调用)
 * 不调用 process.exit，直接执行逻辑
 */
function runReport() {
  try {
    const root = require('./lib/root.js');
    const debugDir = path.join(root, 'debug');
    const statsFile = path.join(debugDir, 'detection-stats.json');
    const reportFile = path.join(debugDir, 'constitution-report.jsonl');
    const reminderFile = path.join(debugDir, 'constitution-reminder-session.json');

    const today = new Date().toISOString().slice(0, 10);
    let todayViolations = 0;
    let ruleBreakdown = {};

    if (fs.existsSync(statsFile)) {
      try {
        const stats = JSON.parse(fs.readFileSync(statsFile, 'utf8'));
        todayViolations = (stats.dailyTotals || {})[today] || 0;
        for (const [ruleId, ruleData] of Object.entries(stats.rules || {})) {
          const todayCount = (ruleData.last7days || {})[today] || 0;
          if (todayCount > 0) {
            ruleBreakdown[ruleId] = todayCount;
          }
        }
      } catch {}
    }

    let filesReminded = 0;
    if (fs.existsSync(reminderFile)) {
      try {
        const session = JSON.parse(fs.readFileSync(reminderFile, 'utf8'));
        filesReminded = (session.reminded || []).length;
      } catch {}
    }

    if (todayViolations > 0 || filesReminded > 0) {
      const entry = {
        ts: new Date().toISOString(),
        date: today,
        violations: todayViolations,
        ruleBreakdown,
        filesReminded,
      };
      safeAppendJsonl(reportFile, entry);
    }

    if (fs.existsSync(reminderFile)) {
      try { fs.unlinkSync(reminderFile); } catch {}
    }
  } catch {}
}

// 模块导出 (供 dispatcher 和测试使用)
if (typeof module !== 'undefined') {
  module.exports = { runReport };
}

if (require.main === module) {
  main();
}