'use strict';

const test = require('node:test');
const assert = require('node:assert');
const fs = require('fs');
const os = require('os');
const path = require('path');

const { ExpansionLog } = require('../src/core/expansionLog');

/** 建一个使用临时目录的日志实例 */
function setup(options) {
  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'autostore-explog-'));
  const filePath = path.join(dir, 'expansion-log.jsonl');
  return { log: new ExpansionLog(Object.assign({ filePath }, options || {})), dir, filePath };
}

test('record 记录开拓玩家、区块与时间', () => {
  const { log } = setup();
  const before = Date.now();
  const entry = log.record({
    botId: 'BotA',
    bot: 'BotA',
    state: '现代大陆',
    chunk: { x: 12, z: -34 },
    block: { x: 200, z: -540 },
    source: 'chat',
    sessionCount: 7
  });
  assert.strictEqual(entry.bot, 'BotA');
  assert.strictEqual(entry.state, '现代大陆');
  assert.strictEqual(entry.cx, 12);
  assert.strictEqual(entry.cz, -34);
  assert.strictEqual(entry.bx, 200);
  assert.strictEqual(entry.bz, -540);
  assert.strictEqual(entry.source, 'chat');
  assert.strictEqual(entry.sessionCount, 7);
  assert.ok(entry.t >= before && entry.t <= Date.now(), '时间戳应落在调用区间内');
});

test('record 缺省字段被安全兜底（无方块坐标 / 无邦国）', () => {
  const { log } = setup();
  const entry = log.record({ botId: 'B', chunk: { x: 1, z: 2 } });
  assert.strictEqual(entry.bx, null);
  assert.strictEqual(entry.bz, null);
  assert.strictEqual(entry.state, '');
  assert.strictEqual(entry.source, 'chat');
  assert.strictEqual(entry.sessionCount, null);
});

test('list 支持按机器人 / 邦国 / 时间过滤并限制条数', () => {
  const { log } = setup();
  const base = Date.now();
  log.record({ botId: 'A', chunk: { x: 0, z: 0 }, state: 'X' });
  log.record({ botId: 'B', chunk: { x: 1, z: 0 }, state: 'Y' });
  log.record({ botId: 'A', chunk: { x: 2, z: 0 }, state: 'Y' });

  assert.strictEqual(log.list().length, 3);
  assert.strictEqual(log.list({ botId: 'A' }).length, 2);
  assert.strictEqual(log.list({ state: 'Y' }).length, 2);
  assert.strictEqual(log.list({ since: base + 1e9 }).length, 0);

  const limited = log.list({ limit: 2 });
  assert.strictEqual(limited.length, 2);
  // 取最新 2 条但保持时间升序
  assert.deepStrictEqual(limited.map((e) => e.cx), [1, 2]);
});

test('stats 汇总总数、按机器人分布与今日条数', () => {
  const { log } = setup();
  log.record({ botId: 'A', chunk: { x: 0, z: 0 } });
  log.record({ botId: 'A', chunk: { x: 1, z: 0 } });
  log.record({ botId: 'B', chunk: { x: 2, z: 0 } });

  const stats = log.stats();
  assert.strictEqual(stats.total, 3);
  assert.strictEqual(stats.buffered, 3);
  assert.strictEqual(stats.today, 3);
  assert.strictEqual(stats.byBot[0].botId, 'A');
  assert.strictEqual(stats.byBot[0].count, 2);
  assert.ok(stats.firstAt > 0 && stats.lastAt >= stats.firstAt);
});

test('落盘为 JSONL，重启后能从磁盘恢复历史', () => {
  const { log, filePath } = setup();
  log.record({ botId: 'A', bot: 'A', chunk: { x: 5, z: 6 }, state: 'S' });
  log.record({ botId: 'B', bot: 'B', chunk: { x: 7, z: 8 } });

  const lines = fs.readFileSync(filePath, 'utf8').trim().split('\n');
  assert.strictEqual(lines.length, 2);
  assert.strictEqual(JSON.parse(lines[0]).cx, 5);

  const reloaded = new ExpansionLog({ filePath });
  assert.strictEqual(reloaded.entries.length, 2);
  assert.strictEqual(reloaded.totalRecorded, 2);
  assert.strictEqual(reloaded.stats().byBot.length, 2);
});

test('磁盘上的损坏行（进程被杀留下的半行）被跳过而不是崩溃', () => {
  const { filePath } = setup();
  fs.writeFileSync(filePath, '{"t":1,"botId":"A","bot":"A","cx":1,"cz":1}\n{"t":2,"botId"', 'utf8');
  const log = new ExpansionLog({ filePath });
  assert.strictEqual(log.entries.length, 1);
  assert.strictEqual(log.entries[0].cx, 1);
});

test('内存环形缓冲超过上限时丢弃最旧记录，但总数继续累计', () => {
  const { log } = setup({ maxEntries: 3 });
  for (let i = 0; i < 5; i++) log.record({ botId: 'A', chunk: { x: i, z: 0 } });
  assert.strictEqual(log.entries.length, 3);
  assert.strictEqual(log.entries[0].cx, 2);
  assert.strictEqual(log.stats().total, 5);
});

test('onEntry 回调收到新记录，回调抛异常不影响写入', () => {
  const { log } = setup();
  const seen = [];
  log.onEntry = (entry) => {
    seen.push(entry.cx);
    throw new Error('订阅者异常');
  };
  assert.doesNotThrow(() => log.record({ botId: 'A', chunk: { x: 9, z: 9 } }));
  assert.deepStrictEqual(seen, [9]);
  assert.strictEqual(log.entries.length, 1);
});

test('exportCsv 输出带 BOM 的表格，含表头与全部记录', () => {
  const { log, dir } = setup();
  log.record({ botId: 'A', bot: 'A', state: 'X', chunk: { x: 1, z: 2 }, block: { x: 16, z: 32 } });
  log.record({ botId: 'B', bot: 'B,带逗号', state: 'Y', chunk: { x: 3, z: 4 } });
  const file = path.join(dir, 'out.csv');
  assert.strictEqual(log.exportCsv(file), file);

  const text = fs.readFileSync(file, 'utf8');
  assert.ok(text.startsWith('\ufeff'), '应带 BOM 以便 Excel 正确识别中文');
  const lines = text.replace(/^\ufeff/, '').split('\r\n');
  assert.ok(lines[0].includes('机器人'));
  assert.strictEqual(lines.length, 3);
  assert.ok(lines[2].includes('"B,带逗号"'), '含逗号的字段应被引号包裹');
});

test('clearBuffer 只清内存，磁盘文件保留', () => {
  const { log, filePath } = setup();
  log.record({ botId: 'A', chunk: { x: 1, z: 1 } });
  log.clearBuffer();
  assert.strictEqual(log.entries.length, 0);
  assert.ok(fs.readFileSync(filePath, 'utf8').trim().length > 0);
});