'use strict';

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

const logPath = path.join(__dirname, '..', 'data', 'zup-actions.json');

function readLog() {
  try {
    const parsed = JSON.parse(fs.readFileSync(logPath, 'utf8'));
    return Array.isArray(parsed) ? parsed : [];
  } catch (err) {
    return [];
  }
}

function writeLog(entries) {
  fs.mkdirSync(path.dirname(logPath), { recursive: true });
  fs.writeFileSync(logPath, JSON.stringify(entries, null, 2), 'utf8');
}

function add({ actor, target, targetFio, action }) {
  const entry = {
    id: crypto.randomBytes(8).toString('hex'),
    ts: Date.now(),
    actor: String(actor || ''),
    target: String(target || ''),
    targetFio: String(targetFio || ''),
    action: action === 'unblock' ? 'unblock' : 'block'
  };
  const entries = readLog();
  entries.push(entry);
  writeLog(entries);
  return entry;
}

function forTarget(login) {
  const needle = String(login || '').toLowerCase();
  return readLog()
    .filter((e) => String(e.target).toLowerCase() === needle)
    .sort((a, b) => (b.ts || 0) - (a.ts || 0));
}

module.exports = { add, forTarget, logPath };