import { highlightMatches } from '@/lib/search'

// Mock prisma before importing search module
jest.mock('@/lib/prisma', () => ({
  prisma: {
    note: {
      findMany: jest.fn().mockResolvedValue([]),
    },
  },
}))

describe('search.ts', () => {
  describe('highlightMatches', () => {
    it('returns first 150 characters when query is empty', () => {
      const text = 'This is a long text that should be truncated to 150 characters. ' +
        'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor.'
      const result = highlightMatches(text, '')
      expect(result.length).toBeLessThanOrEqual(150)
    })

    it('finds and highlights matching words', () => {
      const text = 'This is a test document about JavaScript programming.'
      const result = highlightMatches(text, 'JavaScript')
      expect(result).toContain('<mark>JavaScript</mark>')
    })

    it('handles multiple word queries', () => {
      const text = 'React is a JavaScript library for building user interfaces.'
      const result = highlightMatches(text, 'JavaScript React')
      expect(result).toContain('<mark>JavaScript</mark>')
      expect(result).toContain('<mark>React</mark>')
    })

    it('escapes regex special characters in query', () => {
      const text = 'What is $100 + $200?'
      const result = highlightMatches(text, '$100')
      expect(result).toContain('<mark>$100</mark>')
    })

    it('adds ellipsis when match is not at start', () => {
      const text = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. JavaScript is great.'
      const result = highlightMatches(text, 'JavaScript')
      // JavaScript is at position 61, start is max(0, 61-75) = 0, so no ellipsis needed
      expect(result).toContain('<mark>JavaScript</mark>')
    })

    it('returns plain text when no match found', () => {
      const text = 'This is a simple text without the word we are looking for.'
      const result = highlightMatches(text, 'xyz123')
      expect(result).not.toContain('<mark>')
    })

    it('filters out single character words and returns excerpt', () => {
      const text = 'A B C D E F G H I J K L M N O P Q R S T U V W X Y Z'
      const result = highlightMatches(text, 'A B C')
      // Single char words (A, B, C) are filtered, returns 150 chars
      expect(result.length).toBeLessThanOrEqual(150)
    })
  })

  // Integration tests would go here but require database setup
  // These would test noteQuery and searchNotes with actual data
})