import { NotificationOptions, NotificationService } from "./service";

export interface GotifyConfig {
  url: string;
  token: string;
  enabled: boolean;
}

/**
 * Gotify Notification Service implementation.
 */
export class GotifyNotificationService implements NotificationService {
  constructor(
    private config: GotifyConfig,
    private logger?: { error(msg: string, data?: any): void },
  ) {}

  async notify(options: NotificationOptions): Promise<void> {
    if (!this.config.enabled) return;

    try {
      const { title, message, priority = 4 } = options;

      // Ensure we have a trailing slash for base URL, then append 'message'
      const baseUrl = this.config.url.endsWith("/")
        ? this.config.url
        : `${this.config.url}/`;
      const url = new URL("message", baseUrl);
      url.searchParams.set("token", this.config.token);

      const response = await fetch(url.toString(), {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          title,
          message,
          priority,
        }),
      });

      if (!response.ok) {
        const errorText = await response.text();
        this.logger?.error("Gotify notification failed", {
          status: response.status,
          error: errorText.slice(0, 100),
        });
      }
    } catch (error) {
      this.logger?.error("Gotify notification error", {
        error: (error as Error).message,
      });
    }
  }
}