"use strict";

const { test, describe } = require("node:test");
const assert = require("node:assert/strict");
const { createLogger, singleLine, truncate } = require("../src/logger");

describe("logger", () => {
  test("formats output as JSON-lines with timestamp, level and message", () => {
    const lines = [];
    const fakeStream = {
      write: (str) => lines.push(str),
    };

    const logger = createLogger({ level: "debug", stream: fakeStream });
    logger.info("Тестовое сообщение", { foo: "bar" });

    assert.equal(lines.length, 1);
    const parsed = JSON.parse(lines[0]);
    assert.equal(parsed.level, "info");
    assert.equal(parsed.msg, "Тестовое сообщение");
    assert.equal(parsed.foo, "bar");
    assert.ok(parsed.ts);
  });

  test("respects threshold and suppresses lower levels", () => {
    const lines = [];
    const fakeStream = { write: (str) => lines.push(str) };

    const logger = createLogger({ level: "warn", stream: fakeStream });
    logger.debug("Debug msg");
    logger.info("Info msg");
    assert.equal(lines.length, 0);

    logger.warn("Warn msg");
    logger.error("Error msg");
    assert.equal(lines.length, 2);
  });

  test("sanitizes password, token and auth fields", () => {
    const lines = [];
    const fakeStream = { write: (str) => lines.push(str) };

    const logger = createLogger({ level: "info", stream: fakeStream });
    logger.info("Вход", {
      password: "secretpassword",
      sessionToken: "12345678abcdef",
      cookieHeader: "kadr_session=xyz",
    });

    const parsed = JSON.parse(lines[0]);
    assert.equal(parsed.password, "[REDACTED]");
    assert.equal(parsed.sessionToken, "[REDACTED]");
    assert.equal(parsed.cookieHeader, "[REDACTED]");
  });

  test("singleLine and truncate helpers work properly", () => {
    assert.equal(singleLine("  hello \n\r\t world  "), "hello world");
    assert.equal(truncate("short", 10), "short");
    assert.equal(truncate("123456789012345", 10), "123456789…");
  });
});