import * as plugins from './smartupdate.plugins.js';
import {
  LOG_LEVELS,
  type TLogLevel,
  DEFAULT_MESSAGE_COLOR,
  MESSAGE_PREFIXES,
} from './smartupdate.constants.js';
import type { INotificationOptions, IUpdateCheckResult } from './smartupdate.interfaces.js';

/**
 * Handles all user-facing notifications and console output
 */
export class UpdateNotifier {
  private logLevel: TLogLevel;
  private useColors: boolean;
  private customLogger?: (level: TLogLevel, message: string) => void;

  constructor(options: INotificationOptions) {
    this.logLevel = options.logLevel;
    this.useColors = options.useColors && !process.env.NO_COLOR;
    this.customLogger = options.customLogger;
  }

  /**
   * Check if a message at the given level should be logged
   */
  private shouldLog(level: TLogLevel): boolean {
    return LOG_LEVELS[level] <= LOG_LEVELS[this.logLevel];
  }

  /**
   * Colorize a string if colors are enabled
   */
  private colorize(text: string, color: any = DEFAULT_MESSAGE_COLOR): string {
    if (!this.useColors) {
      return text;
    }
    return plugins.consolecolor.coloredString(text, color as any);
  }

  /**
   * Log a message at the specified level
   */
  private log(level: TLogLevel, message: string): void {
    if (!this.shouldLog(level)) {
      return;
    }

    if (this.customLogger) {
      this.customLogger(level, message);
    } else {
      console.log(message);
    }
  }

  /**
   * Log a debug message
   */
  public debug(message: string): void {
    this.log('DEBUG', `${MESSAGE_PREFIXES.INFO} ${message}`);
  }

  /**
   * Log an info message
   */
  public info(message: string): void {
    this.log('INFO', `${MESSAGE_PREFIXES.SMARTUPDATE} ${message}`);
  }

  /**
   * Log a warning message
   */
  public warn(message: string): void {
    this.log('WARN', `${MESSAGE_PREFIXES.WARN} ${message}`);
  }

  /**
   * Log an error message
   */
  public error(message: string): void {
    this.log('ERROR', `${MESSAGE_PREFIXES.ERROR} ${message}`);
  }

  /**
   * Notify about checking for updates
   */
  public notifyCheckingForUpdate(packageName: string): void {
    this.info(
      `checking for newer version of ${this.colorize(packageName)}...`
    );
  }

  /**
   * Notify that the package is up to date
   */
  public notifyUpToDate(packageName: string): void {
    this.info(
      `You are running the latest version of ${this.colorize(packageName)}`
    );
  }

  /**
   * Notify that an update is available
   */
  public notifyUpdateAvailable(packageName: string, currentVersion: string, latestVersion: string): void {
    this.warn(`There is a newer version of ${packageName} available on npm.`);
    this.warn(`Your version: ${currentVersion} | version on npm: ${latestVersion}`);
  }

  /**
   * Notify that a check was skipped due to rate limiting
   */
  public notifyCheckSkipped(packageName: string, nextCheckMinutes: number): void {
    const minutes = Math.floor(nextCheckMinutes) + 1;
    this.info(
      `Already checked recently. Next check available in ${minutes} minute${minutes !== 1 ? 's' : ''}: ` +
        this.colorize(packageName)
    );
  }

  /**
   * Notify that the changelog is being opened
   */
  public notifyOpeningChangelog(): void {
    this.info('Opening changelog in browser...');
  }

  /**
   * Notify about a registry error
   */
  public notifyRegistryError(): void {
    this.warn('Failed to retrieve package information.');
    this.info('Is the registry down?');
  }

  /**
   * Notify with a complete update check result
   */
  public notifyUpdateCheckResult(result: IUpdateCheckResult): void {
    switch (result.status) {
      case 'up-to-date':
        this.notifyUpToDate(result.packageName);
        break;

      case 'update-available':
        if (result.latestVersion) {
          this.notifyUpdateAvailable(
            result.packageName,
            result.currentVersion,
            result.latestVersion
          );
        }
        break;

      case 'check-skipped':
        if (result.nextCheckTime && result.reason) {
          const minutesUntilNext = (result.nextCheckTime.getTime() - result.checkTime.getTime()) / 60000;
          this.notifyCheckSkipped(result.packageName, minutesUntilNext);
        }
        break;

      case 'error':
        if (result.error) {
          this.error(result.error.message);
        }
        break;
    }
  }
}