import { describe, it, expect, vi, beforeEach } from 'vitest';
import { deleteEvent, canDeleteEvent } from '$lib/services/deletion';
import NDK, { NDKEvent, NDKRelaySet } from '@nostr-dev-kit/ndk';

describe('Deletion Service', () => {
  let mockNdk: NDK;
  let mockEvent: NDKEvent;

  beforeEach(() => {
    // Create mock NDK instance
    mockNdk = {
      activeUser: {
        pubkey: 'test-pubkey-123',
      },
      pool: {
        relays: new Map([
          ['wss://relay1.example.com', { url: 'wss://relay1.example.com' }],
          ['wss://relay2.example.com', { url: 'wss://relay2.example.com' }],
        ]),
      },
    } as unknown as NDK;

    // Create mock event
    mockEvent = {
      id: 'event-id-123',
      kind: 30041,
      pubkey: 'test-pubkey-123',
      tagAddress: () => '30041:test-pubkey-123:test-identifier',
    } as unknown as NDKEvent;
  });

  describe('canDeleteEvent', () => {
    it('should return true when user is the event author', () => {
      const result = canDeleteEvent(mockEvent, mockNdk);
      expect(result).toBe(true);
    });

    it('should return false when user is not the event author', () => {
      const differentUserEvent = {
        ...mockEvent,
        pubkey: 'different-pubkey-456',
      } as unknown as NDKEvent;

      const result = canDeleteEvent(differentUserEvent, mockNdk);
      expect(result).toBe(false);
    });

    it('should return false when event is null', () => {
      const result = canDeleteEvent(null, mockNdk);
      expect(result).toBe(false);
    });

    it('should return false when ndk has no active user', () => {
      const ndkWithoutUser = {
        ...mockNdk,
        activeUser: undefined,
      } as unknown as NDK;

      const result = canDeleteEvent(mockEvent, ndkWithoutUser);
      expect(result).toBe(false);
    });
  });

  describe('deleteEvent', () => {
    it('should return error when no eventId or eventAddress provided', async () => {
      const result = await deleteEvent({}, mockNdk);

      expect(result.success).toBe(false);
      expect(result.error).toBe('Either eventId or eventAddress must be provided');
    });

    it('should return error when user is not logged in', async () => {
      const ndkWithoutUser = {
        ...mockNdk,
        activeUser: undefined,
      } as unknown as NDK;

      const result = await deleteEvent(
        { eventId: 'test-id' },
        ndkWithoutUser
      );

      expect(result.success).toBe(false);
      expect(result.error).toBe('Please log in first');
    });

    it('should create deletion event with correct tags', async () => {
      const mockSign = vi.fn();
      const mockPublish = vi.fn().mockResolvedValue(new Set(['wss://relay1.example.com']));

      // Mock NDKEvent constructor
      const MockNDKEvent = vi.fn().mockImplementation(function(this: any) {
        this.kind = 0;
        this.created_at = 0;
        this.tags = [];
        this.content = '';
        this.pubkey = '';
        this.sign = mockSign;
        this.publish = mockPublish;
        return this;
      });

      // Mock NDKRelaySet
      const mockRelaySet = {} as NDKRelaySet;
      vi.spyOn(NDKRelaySet, 'fromRelayUrls').mockReturnValue(mockRelaySet);

      // Replace global NDKEvent temporarily
      const originalNDKEvent = global.NDKEvent;
      (global as any).NDKEvent = MockNDKEvent;

      const result = await deleteEvent(
        {
          eventId: 'event-123',
          eventAddress: '30041:pubkey:identifier',
          eventKind: 30041,
          reason: 'Test deletion',
        },
        mockNdk
      );

      // Restore original
      (global as any).NDKEvent = originalNDKEvent;

      expect(MockNDKEvent).toHaveBeenCalled();
      expect(mockSign).toHaveBeenCalled();
      expect(mockPublish).toHaveBeenCalled();
    });
  });
});