/**
 * Edge case and error scenario tests for the Daily Notification plugin
 * Tests unusual conditions and error handling
 */

import { describe, it, expect, beforeEach, jest } from '@jest/globals';
import { DailyNotificationPlugin, NotificationEvent } from '../src/definitions';
import { DailyNotification } from '../src/daily-notification';

describe('DailyNotification Edge Cases', () => {
  let plugin: DailyNotification;
  let mockPlugin: jest.Mocked<DailyNotificationPlugin>;

  beforeEach(() => {
    mockPlugin = {
      scheduleDailyNotification: jest.fn(),
      getLastNotification: jest.fn(),
      cancelAllNotifications: jest.fn(),
      getNotificationStatus: jest.fn(),
      updateSettings: jest.fn(),
      checkPermissions: jest.fn(),
      requestPermissions: jest.fn(),
    };
    plugin = new DailyNotification(mockPlugin);
  });

  describe('Time Format Edge Cases', () => {
    it('should handle 24-hour time format edge cases', async () => {
      const edgeCases = [
        '00:00', // Midnight
        '23:59', // End of day
        '12:00', // Noon
        '13:00', // 1 PM
      ];

      for (const time of edgeCases) {
        await plugin.scheduleDailyNotification({
          url: 'https://api.example.com/time-test',
          time,
        });
      }

      expect(mockPlugin.scheduleDailyNotification).toHaveBeenCalledTimes(4);
      expect(mockPlugin.scheduleDailyNotification).toHaveBeenCalledWith(
        expect.objectContaining({
          time: '00:00',
        })
      );
    });

    it('should reject invalid time formats', async () => {
      const invalidTimes = [
        '24:00', // Invalid hour
        '12:60', // Invalid minutes
        '9:00',  // Missing leading zero
        '13:5',  // Missing trailing zero
        '25:00', // Hour > 24
        '12:61', // Minutes > 60
      ];

      for (const time of invalidTimes) {
        await expect(
          plugin.scheduleDailyNotification({
            url: 'https://api.example.com/invalid-time',
            time,
          })
        ).rejects.toThrow('Invalid time format');
      }
    });
  });

  describe('Timezone Edge Cases', () => {
    it('should handle timezone transitions', async () => {
      const timezones = [
        'America/New_York', // DST transitions
        'Europe/London',    // DST transitions
        'Asia/Kolkata',     // No DST
        'Pacific/Auckland', // DST transitions
      ];

      for (const timezone of timezones) {
        await plugin.scheduleDailyNotification({
          url: 'https://api.example.com/timezone-test',
          time: '09:00',
          timezone,
        });
      }

      expect(mockPlugin.scheduleDailyNotification).toHaveBeenCalledTimes(4);
      expect(mockPlugin.scheduleDailyNotification).toHaveBeenCalledWith(
        expect.objectContaining({
          timezone: 'America/New_York',
        })
      );
    });

    it('should handle invalid timezone formats', async () => {
      const invalidTimezones = [
        'Invalid/Timezone',
        'America/Invalid',
        'Europe/Invalid',
        'Asia/Invalid',
      ];

      for (const timezone of invalidTimezones) {
        await expect(
          plugin.scheduleDailyNotification({
            url: 'https://api.example.com/invalid-timezone',
            time: '09:00',
            timezone,
          })
        ).rejects.toThrow('Invalid timezone');
      }
    });
  });

  describe('Network Edge Cases', () => {
    it('should handle network timeouts', async () => {
      mockPlugin.scheduleDailyNotification.mockRejectedValueOnce(
        new Error('Network timeout')
      );

      await expect(
        plugin.scheduleDailyNotification({
          url: 'https://api.example.com/timeout',
          time: '09:00',
          retryCount: 3,
          retryInterval: 1000,
        })
      ).rejects.toThrow('Network timeout');
    });

    it('should handle offline scenarios', async () => {
      mockPlugin.scheduleDailyNotification.mockRejectedValueOnce(
        new Error('No internet connection')
      );

      await expect(
        plugin.scheduleDailyNotification({
          url: 'https://api.example.com/offline',
          time: '09:00',
          offlineFallback: true,
        })
      ).rejects.toThrow('No internet connection');
    });

    it('should handle malformed responses', async () => {
      const malformedResponse = new Response('Invalid JSON');
      mockPlugin.scheduleDailyNotification.mockRejectedValueOnce(
        new Error('Invalid response format')
      );

      await expect(
        plugin.scheduleDailyNotification({
          url: 'https://api.example.com/malformed',
          time: '09:00',
          contentHandler: async () => {
            const data = await malformedResponse.json();
            return {
              title: data.title,
              body: data.content,
            };
          },
        })
      ).rejects.toThrow('Invalid response format');
    });
  });

  describe('Content Handler Edge Cases', () => {
    it('should handle content handler timeouts', async () => {
      const slowHandler = async () => {
        await new Promise(resolve => setTimeout(resolve, 5000));
        return {
          title: 'Slow Content',
          body: 'This took too long',
        };
      };

      await expect(
        plugin.scheduleDailyNotification({
          url: 'https://api.example.com/slow',
          time: '09:00',
          contentHandler: slowHandler,
        })
      ).rejects.toThrow('Content handler timeout');
    });

    it('should handle invalid content handler responses', async () => {
      const invalidHandler = async () => {
        return {
          title: 'Invalid Content',
          body: 'Missing required data',
          // Missing required fields
          data: { timestamp: new Date().toISOString() },
        };
      };

      await expect(
        plugin.scheduleDailyNotification({
          url: 'https://api.example.com/invalid-content',
          time: '09:00',
          contentHandler: invalidHandler,
        })
      ).rejects.toThrow('Invalid content handler response');
    });
  });

  describe('Event Handling Edge Cases', () => {
    it('should handle multiple event listeners for same event', async () => {
      const event = new Event('notification') as NotificationEvent;
      event.detail = {
        id: 'test-id',
        action: 'delivered',
      };

      const handlers = [jest.fn(), jest.fn(), jest.fn()];
      handlers.forEach(handler => plugin.on('notification', handler));
      document.dispatchEvent(event);

      handlers.forEach(handler => {
        expect(handler).toHaveBeenCalledWith(event);
      });
    });

    it('should handle event listener removal', async () => {
      const event = new Event('notification') as NotificationEvent;
      event.detail = {
        id: 'test-id',
        action: 'delivered',
      };

      const handler = jest.fn();
      plugin.on('notification', handler);
      plugin.off('notification', handler);
      document.dispatchEvent(event);

      expect(handler).not.toHaveBeenCalled();
    });

    it('should handle event listener errors gracefully', async () => {
      const event = new Event('notification') as NotificationEvent;
      event.detail = {
        id: 'test-id',
        action: 'delivered',
      };

      const errorHandler = jest.fn().mockImplementation(() => {
        throw new Error('Handler error');
      });

      plugin.on('notification', errorHandler);
      document.dispatchEvent(event);

      expect(errorHandler).toHaveBeenCalledWith(event);
      // Error should be caught and logged, not thrown
    });
  });

  describe('Resource Management Edge Cases', () => {
    it('should handle memory leaks from event listeners', async () => {
      const event = new Event('notification') as NotificationEvent;
      event.detail = {
        id: 'test-id',
        action: 'delivered',
      };

      // Add many event listeners
      const handlers = Array(1000).fill(null).map(() => jest.fn());
      handlers.forEach(handler => plugin.on('notification', handler));

      // Remove all listeners
      handlers.forEach(handler => plugin.off('notification', handler));

      // Trigger event
      document.dispatchEvent(event);

      // Verify no handlers were called
      handlers.forEach(handler => {
        expect(handler).not.toHaveBeenCalled();
      });
    });

    it('should handle concurrent notification scheduling', async () => {
      const notifications = Array(10).fill(null).map((_, i) => ({
        url: `https://api.example.com/concurrent-${i}`,
        time: '09:00',
      }));

      const promises = notifications.map(notification =>
        plugin.scheduleDailyNotification(notification)
      );

      await Promise.all(promises);

      expect(mockPlugin.scheduleDailyNotification).toHaveBeenCalledTimes(10);
    });
  });

  describe('Platform-Specific Edge Cases', () => {
    it('should handle platform-specific permission denials', async () => {
      mockPlugin.scheduleDailyNotification.mockRejectedValueOnce(
        new Error('Permission denied')
      );

      await expect(
        plugin.scheduleDailyNotification({
          url: 'https://api.example.com/permission-denied',
          time: '09:00',
        })
      ).rejects.toThrow('Permission denied');
    });

    it('should handle platform-specific background restrictions', async () => {
      mockPlugin.scheduleDailyNotification.mockRejectedValueOnce(
        new Error('Background execution not allowed')
      );

      await expect(
        plugin.scheduleDailyNotification({
          url: 'https://api.example.com/background-restricted',
          time: '09:00',
        })
      ).rejects.toThrow('Background execution not allowed');
    });
  });
});