const MAX_LOG_ENTRIES = 500;
const logs = [];

function formatTimestamp(ts) {
  return ts.toISOString().replace("T", " ").replace("Z", "");
}

function safeStringify(val) {
  if (val === undefined) return undefined;
  try {
    const s = JSON.stringify(val);
    return s && s.length < 500 ? s : s.substring(0, 500) + "...";
  } catch {
    return String(val);
  }
}

function createLogger(module) {
  function log(level, message, data) {
    const entry = {
      time: new Date(),
      module,
      level,
      message,
      data: safeStringify(data),
    };
    logs.push(entry);
    if (logs.length > MAX_LOG_ENTRIES) logs.shift();

    const prefix = `[OrbitMarks:${module}] [${level}]`;
    const line = `${prefix} ${message}`;
    switch (level) {
      case "ERROR":
        console.error(line, ...(data ? [data] : []));
        break;
      case "WARN":
        console.warn(line, ...(data ? [data] : []));
        break;
      case "INFO":
        console.info(line, ...(data ? [data] : []));
        break;
      case "DEBUG":
        console.debug(line, ...(data ? [data] : []));
        break;
      default:
        console.log(line, ...(data ? [data] : []));
        break;
    }
  }

  const logMethods = {
    error: (msg, data) => log("ERROR", msg, data),
    warn: (msg, data) => log("WARN", msg, data),
    info: (msg, data) => log("INFO", msg, data),
    debug: (msg, data) => log("DEBUG", msg, data),
    trace: (msg, data) => log("TRACE", msg, data),
    timer: (label) => {
      const start = Date.now();
      return (msg, data) => {
        const elapsed = Date.now() - start;
        log("INFO", `${label} — ${msg} (${elapsed}ms)`, data);
        return elapsed;
      };
    },
  };

  return logMethods;
}

function getLogs() {
  return logs;
}

function clearLogs() {
  logs.length = 0;
}

function getLogsAsText() {
  return logs
    .map((e) => {
      const time = formatTimestamp(e.time);
      const data = e.data ? ` ${e.data}` : "";
      return `[${time}] [${e.module}] [${e.level}] ${e.message}${data}`;
    })
    .join("\n");
}