import { getDashboardData, hasVisibleBlocks, DashboardNote, DashboardData } from '@/lib/dashboard'

// Mock prisma and usage before importing dashboard module
jest.mock('@/lib/prisma', () => ({
  prisma: {
    note: {
      findMany: jest.fn(),
    },
  },
}))

jest.mock('@/lib/usage', () => ({
  getRecentlyUsedNotes: jest.fn(),
}))

import { prisma } from '@/lib/prisma'
import { getRecentlyUsedNotes } from '@/lib/usage'

describe('dashboard.ts', () => {
  const mockNotes = [
    {
      id: 'note-1',
      title: 'Docker Commands',
      content: 'docker build, docker run',
      type: 'command',
      isFavorite: true,
      isPinned: false,
      createdAt: new Date('2024-01-01'),
      updatedAt: new Date('2024-01-15'),
      tags: [{ tag: { id: 'tag-1', name: 'docker' } }],
    },
    {
      id: 'note-2',
      title: 'React Snippet',
      content: 'useState usage',
      type: 'snippet',
      isFavorite: false,
      isPinned: true,
      createdAt: new Date('2024-01-02'),
      updatedAt: new Date('2024-01-14'),
      tags: [{ tag: { id: 'tag-2', name: 'react' } }],
    },
    {
      id: 'note-3',
      title: 'Git Commands',
      content: 'git commit, git push',
      type: 'command',
      isFavorite: false,
      isPinned: false,
      createdAt: new Date('2024-01-03'),
      updatedAt: new Date('2024-01-13'),
      tags: [{ tag: { id: 'tag-3', name: 'git' } }],
    },
    {
      id: 'note-4',
      title: 'SQL Queries',
      content: 'SELECT * FROM',
      type: 'snippet',
      isFavorite: true,
      isPinned: true,
      createdAt: new Date('2024-01-04'),
      updatedAt: new Date('2024-01-12'),
      tags: [{ tag: { id: 'tag-4', name: 'sql' } }],
    },
  ]

  beforeEach(() => {
    jest.clearAllMocks()
  })

  describe('getDashboardData', () => {
    it('should return dashboard data with all sections', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([
        { noteId: 'note-1', count: 5, lastUsed: new Date() },
        { noteId: 'note-2', count: 3, lastUsed: new Date() },
      ])

      const result = await getDashboardData(3)

      expect(result).toHaveProperty('recentNotes')
      expect(result).toHaveProperty('mostUsedNotes')
      expect(result).toHaveProperty('recentCommands')
      expect(result).toHaveProperty('recentSnippets')
      expect(result).toHaveProperty('activityBasedNotes')
      expect(result).toHaveProperty('hasActivity')
    })

    it('should return recent notes ordered by updatedAt', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([])

      const result = await getDashboardData(2)

      expect(result.recentNotes).toHaveLength(2)
      expect(result.recentNotes[0].id).toBe('note-1') // most recent
      expect(result.recentNotes[1].id).toBe('note-2')
    })

    it('should return most used notes by usage count', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([
        { noteId: 'note-2', count: 10, lastUsed: new Date() },
        { noteId: 'note-1', count: 5, lastUsed: new Date() },
      ])

      const result = await getDashboardData(3)

      expect(result.mostUsedNotes).toHaveLength(2)
      expect(result.mostUsedNotes[0].id).toBe('note-2') // highest usage
      expect(result.mostUsedNotes[0].usageCount).toBe(10)
    })

    it('should return only command type notes for recentCommands', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([])

      const result = await getDashboardData(5)

      expect(result.recentCommands).toHaveLength(2)
      expect(result.recentCommands.every((n: DashboardNote) => n.type === 'command')).toBe(true)
      expect(result.recentCommands[0].id).toBe('note-1')
    })

    it('should return only snippet type notes for recentSnippets', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([])

      const result = await getDashboardData(5)

      expect(result.recentSnippets).toHaveLength(2)
      expect(result.recentSnippets.every((n: DashboardNote) => n.type === 'snippet')).toBe(true)
    })

    it('should return activity based notes excluding recent notes', async () => {
      // mockNotes are sorted by updatedAt desc: note-1, note-2, note-3, note-4
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)
      // note-4 is in recently used but will be filtered out since recentNotes has first 3
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([
        { noteId: 'note-4', count: 5, lastUsed: new Date() },
      ])

      const result = await getDashboardData(3)

      // note-4 is used but not in recentNotes (which contains note-1, note-2, note-3)
      expect(result.activityBasedNotes).toHaveLength(1)
      expect(result.activityBasedNotes[0].id).toBe('note-4')
    })

    it('should set hasActivity based on recently used notes', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)

      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([
        { noteId: 'note-1', count: 5, lastUsed: new Date() },
      ])

      const resultWithActivity = await getDashboardData(3)
      expect(resultWithActivity.hasActivity).toBe(true)

      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([])
      const resultWithoutActivity = await getDashboardData(3)
      expect(resultWithoutActivity.hasActivity).toBe(false)
    })

    it('should respect the limit parameter', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([
        { noteId: 'note-1', count: 10, lastUsed: new Date() },
        { noteId: 'note-2', count: 8, lastUsed: new Date() },
        { noteId: 'note-3', count: 6, lastUsed: new Date() },
        { noteId: 'note-4', count: 4, lastUsed: new Date() },
      ])

      const result = await getDashboardData(2)

      expect(result.recentNotes).toHaveLength(2)
      expect(result.mostUsedNotes).toHaveLength(2)
    })

    it('should add usageCount to notes from usage map', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([
        { noteId: 'note-1', count: 10, lastUsed: new Date() },
        { noteId: 'note-2', count: 5, lastUsed: new Date() },
      ])

      const result = await getDashboardData(3)

      const note1 = result.mostUsedNotes.find((n: DashboardNote) => n.id === 'note-1')
      const note2 = result.mostUsedNotes.find((n: DashboardNote) => n.id === 'note-2')
      expect(note1?.usageCount).toBe(10)
      expect(note2?.usageCount).toBe(5)
    })

    it('should return empty arrays when no notes exist', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue([])
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([])

      const result = await getDashboardData()

      expect(result.recentNotes).toEqual([])
      expect(result.mostUsedNotes).toEqual([])
      expect(result.recentCommands).toEqual([])
      expect(result.recentSnippets).toEqual([])
      expect(result.activityBasedNotes).toEqual([])
      expect(result.hasActivity).toBe(false)
    })

    it('should convert dates to ISO strings', async () => {
      ;(prisma.note.findMany as jest.Mock).mockResolvedValue(mockNotes)
      ;(getRecentlyUsedNotes as jest.Mock).mockResolvedValue([])

      const result = await getDashboardData(1)

      expect(result.recentNotes[0].createdAt).toBe('2024-01-01T00:00:00.000Z')
      expect(result.recentNotes[0].updatedAt).toBe('2024-01-15T00:00:00.000Z')
    })
  })

  describe('hasVisibleBlocks', () => {
    it('should return true when recentNotes has items', () => {
      const data: DashboardData = {
        recentNotes: [{ id: '1', title: 'Test', content: '', type: 'note' as const, isFavorite: false, isPinned: false, createdAt: '', updatedAt: '', tags: [] }],
        mostUsedNotes: [],
        recentCommands: [],
        recentSnippets: [],
        activityBasedNotes: [],
        hasActivity: false,
      }
      expect(hasVisibleBlocks(data)).toBe(true)
    })

    it('should return true when mostUsedNotes has items', () => {
      const data: DashboardData = {
        recentNotes: [],
        mostUsedNotes: [{ id: '1', title: 'Test', content: '', type: 'note' as const, isFavorite: false, isPinned: false, createdAt: '', updatedAt: '', tags: [], usageCount: 5 }],
        recentCommands: [],
        recentSnippets: [],
        activityBasedNotes: [],
        hasActivity: false,
      }
      expect(hasVisibleBlocks(data)).toBe(true)
    })

    it('should return true when recentCommands has items', () => {
      const data: DashboardData = {
        recentNotes: [],
        mostUsedNotes: [],
        recentCommands: [{ id: '1', title: 'Test', content: '', type: 'command' as const, isFavorite: false, isPinned: false, createdAt: '', updatedAt: '', tags: [] }],
        recentSnippets: [],
        activityBasedNotes: [],
        hasActivity: false,
      }
      expect(hasVisibleBlocks(data)).toBe(true)
    })

    it('should return true when recentSnippets has items', () => {
      const data: DashboardData = {
        recentNotes: [],
        mostUsedNotes: [],
        recentCommands: [],
        recentSnippets: [{ id: '1', title: 'Test', content: '', type: 'snippet' as const, isFavorite: false, isPinned: false, createdAt: '', updatedAt: '', tags: [] }],
        activityBasedNotes: [],
        hasActivity: false,
      }
      expect(hasVisibleBlocks(data)).toBe(true)
    })

    it('should return true when activityBasedNotes has items', () => {
      const data: DashboardData = {
        recentNotes: [],
        mostUsedNotes: [],
        recentCommands: [],
        recentSnippets: [],
        activityBasedNotes: [{ id: '1', title: 'Test', content: '', type: 'note' as const, isFavorite: false, isPinned: false, createdAt: '', updatedAt: '', tags: [] }],
        hasActivity: true,
      }
      expect(hasVisibleBlocks(data)).toBe(true)
    })

    it('should return false when all arrays are empty', () => {
      const data: DashboardData = {
        recentNotes: [],
        mostUsedNotes: [],
        recentCommands: [],
        recentSnippets: [],
        activityBasedNotes: [],
        hasActivity: false,
      }
      expect(hasVisibleBlocks(data)).toBe(false)
    })
  })
})