/**
 * In-Memory Implementation: InMemoryNotificationPreferenceRepository
 * 
 * Provides an in-memory storage implementation for notification preferences.
 */

import { NotificationPreference } from '../../domain/entities/NotificationPreference';
import type { INotificationPreferenceRepository } from '../../domain/repositories/INotificationPreferenceRepository';
import type { ILogger } from '@gridpilot/shared/logging/ILogger';

export class InMemoryNotificationPreferenceRepository implements INotificationPreferenceRepository {
  private preferences: Map<string, NotificationPreference> = new Map();
  private readonly logger: ILogger;

  constructor(logger: ILogger, initialPreferences: NotificationPreference[] = []) {
    this.logger = logger;
    this.logger.info('InMemoryNotificationPreferenceRepository initialized.');
    initialPreferences.forEach(pref => {
      this.preferences.set(pref.driverId, pref);
      this.logger.debug(`Seeded preference for driver: ${pref.driverId}`);
    });
  }

  async findByDriverId(driverId: string): Promise<NotificationPreference | null> {
    this.logger.debug(`Finding notification preference for driver: ${driverId}`);
    try {
      const preference = this.preferences.get(driverId) || null;
      if (preference) {
        this.logger.info(`Found preference for driver: ${driverId}`);
      } else {
        this.logger.warn(`Preference not found for driver: ${driverId}`);
      }
      return preference;
    } catch (error) {
      this.logger.error(`Error finding preference for driver ${driverId}:`, error);
      throw error;
    }
  }

  async save(preference: NotificationPreference): Promise<void> {
    this.logger.debug(`Saving notification preference for driver: ${preference.driverId}`);
    try {
      this.preferences.set(preference.driverId, preference);
      this.logger.info(`Preference for driver ${preference.driverId} saved successfully.`);
    } catch (error) {
      this.logger.error(`Error saving preference for driver ${preference.driverId}:`, error);
      throw error;
    }
  }

  async delete(driverId: string): Promise<void> {
    this.logger.debug(`Deleting notification preference for driver: ${driverId}`);
    try {
      if (this.preferences.delete(driverId)) {
        this.logger.info(`Preference for driver ${driverId} deleted successfully.`);
      } else {
        this.logger.warn(`Preference for driver ${driverId} not found for deletion.`);
      }
    } catch (error) {
      this.logger.error(`Error deleting preference for driver ${driverId}:`, error);
      throw error;
    }
  }

  async getOrCreateDefault(driverId: string): Promise<NotificationPreference> {
    this.logger.debug(`Getting or creating default notification preference for driver: ${driverId}`);
    try {
      const existing = this.preferences.get(driverId);
      if (existing) {
        this.logger.debug(`Existing preference found for driver: ${driverId}.`);
        return existing;
      }

      this.logger.info(`Creating default preference for driver: ${driverId}.`);
      const defaultPreference = NotificationPreference.createDefault(driverId);
      this.preferences.set(driverId, defaultPreference);
      this.logger.info(`Default preference created and saved for driver: ${driverId}.`);
      return defaultPreference;
    } catch (error) {
      this.logger.error(`Error getting or creating default preference for driver ${driverId}:`, error);
      throw error;
    }
  }
}