import type { Signal } from "../..";
import {
  LogLevelOptions,
  parseDebugModeQueryString,
  parseSignalsLogLevel,
} from "../../core/debug-mode";
import { WebStorage } from "../storage/web-storage";

class Logger {
  private logLevelKey = "segment_signals_log_level";
  private storage = new WebStorage(window.sessionStorage);
  get logLevel(): LogLevelOptions {
    return this.storage.getItem(this.logLevelKey) ?? "off";
  }

  constructor() {
    // if log level is set in query string, use that, otherwise if debug mode is set, set log level to info
    const logLevel = parseSignalsLogLevel();
    if (logLevel !== undefined) {
      logLevel === "off" ? this.disableLogging() : this.enableLogging(logLevel);
    } else {
      const debugMode = parseDebugModeQueryString();
      if (debugMode === true) {
        this.enableLogging("info");
      }
    }
  }

  enableLogging = (type: LogLevelOptions) => {
    this.storage.setItem(this.logLevelKey, type);
  };

  disableLogging = () => {
    this.storage.setItem(this.logLevelKey, "off");
  };

  private log = (level: "info" | "debug", ...args: any[]): void => {
    console.log(`[signals:${level}]`, ...args);
  };

  info = (...args: any[]): void => {
    if (this.logLevel === "info" || this.logLevel === "debug") {
      this.log("info", ...args);
    }
  };

  debug = (...args: any[]): void => {
    if (this.logLevel === "debug") {
      this.log("debug", ...args);
    }
  };

  logSignal = (signal: Signal): void => {
    this.info(
      "New signal:",
      signal.type,
      signal.data,
      ...(signal.type === "interaction" && "change" in signal.data
        ? ["change:", JSON.stringify(signal.data.change, null, 2)]
        : []),
    );
  };
}

export const logger = new Logger();