import { createPinia, setActivePinia } from 'pinia'
import { beforeEach, describe, expect, it, vi } from 'vitest'

import { useAssetsStore } from '@/stores/assetsStore'
import { api } from '@/scripts/api'
import type {
  HistoryTaskItem,
  TaskPrompt,
  TaskStatus,
  TaskOutput
} from '@/schemas/apiSchema'

// Mock the api module
vi.mock('@/scripts/api', () => ({
  api: {
    getHistory: vi.fn(),
    internalURL: vi.fn((path) => `http://localhost:3000${path}`),
    user: 'test-user'
  }
}))

// Mock the asset service
vi.mock('@/platform/assets/services/assetService', () => ({
  assetService: {
    getAssetsByTag: vi.fn()
  }
}))

// Mock distribution type
vi.mock('@/platform/distribution/types', () => ({
  isCloud: false
}))

// Mock TaskItemImpl
vi.mock('@/stores/queueStore', () => ({
  TaskItemImpl: class {
    public flatOutputs: Array<{
      supportsPreview: boolean
      filename: string
      subfolder: string
      type: string
      url: string
    }>
    public previewOutput:
      | {
          supportsPreview: boolean
          filename: string
          subfolder: string
          type: string
          url: string
        }
      | undefined

    constructor(
      public taskType: string,
      public prompt: TaskPrompt,
      public status: TaskStatus | undefined,
      public outputs: TaskOutput
    ) {
      this.flatOutputs = this.outputs
        ? [
            {
              supportsPreview: true,
              filename: 'test.png',
              subfolder: '',
              type: 'output',
              url: 'http://test.com/test.png'
            }
          ]
        : []
      this.previewOutput = this.flatOutputs[0]
    }
  }
}))

// Mock asset mappers - add unique timestamps
vi.mock('@/platform/assets/composables/media/assetMappers', () => ({
  mapInputFileToAssetItem: vi.fn((name, index, type) => ({
    id: `${type}-${index}`,
    name,
    size: 0,
    created_at: new Date(Date.now() - index * 1000).toISOString(), // Unique timestamps
    tags: [type],
    preview_url: `http://test.com/${name}`
  })),
  mapTaskOutputToAssetItem: vi.fn((task, output) => {
    const index = parseInt(task.prompt[1].split('_')[1]) || 0
    return {
      id: task.prompt[1], // Use promptId as asset ID
      name: output.filename,
      size: 0,
      created_at: new Date(Date.now() - index * 1000).toISOString(), // Unique timestamps
      tags: ['output'],
      preview_url: output.url,
      user_metadata: {}
    }
  })
}))

describe('assetsStore - Refactored (Option A)', () => {
  let store: ReturnType<typeof useAssetsStore>

  // Helper function to create mock history items
  const createMockHistoryItem = (index: number): HistoryTaskItem => ({
    taskType: 'History' as const,
    prompt: [
      1000 + index, // queueIndex
      `prompt_${index}`, // promptId
      {}, // promptInputs
      {
        extra_pnginfo: {
          workflow: {
            last_node_id: 1,
            last_link_id: 1,
            nodes: [],
            links: [],
            groups: [],
            config: {},
            version: 1
          }
        }
      }, // extraData
      [] // outputsToExecute
    ],
    status: {
      status_str: 'success' as const,
      completed: true,
      messages: []
    },
    outputs: {
      '1': {
        images: [
          {
            filename: `output_${index}.png`,
            subfolder: '',
            type: 'output' as const
          }
        ]
      }
    }
  })

  beforeEach(() => {
    setActivePinia(createPinia())
    store = useAssetsStore()
    vi.clearAllMocks()
  })

  describe('Initial Load', () => {
    it('should load initial history items', async () => {
      const mockHistory = Array.from({ length: 10 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValue({
        History: mockHistory
      })

      await store.updateHistory()

      expect(api.getHistory).toHaveBeenCalledWith(200, { offset: 0 })
      expect(store.historyAssets).toHaveLength(10)
      expect(store.hasMoreHistory).toBe(false) // Less than BATCH_SIZE
      expect(store.historyLoading).toBe(false)
      expect(store.historyError).toBe(null)
    })

    it('should set hasMoreHistory to true when batch is full', async () => {
      const mockHistory = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValue({
        History: mockHistory
      })

      await store.updateHistory()

      expect(store.historyAssets).toHaveLength(200)
      expect(store.hasMoreHistory).toBe(true) // Exactly BATCH_SIZE
    })

    it('should handle errors during initial load', async () => {
      const error = new Error('Failed to fetch')
      vi.mocked(api.getHistory).mockRejectedValue(error)

      await store.updateHistory()

      expect(store.historyAssets).toHaveLength(0)
      expect(store.historyError).toBe(error)
      expect(store.historyLoading).toBe(false)
    })
  })

  describe('Pagination', () => {
    it('should accumulate items when loading more', async () => {
      // First batch - full BATCH_SIZE
      const firstBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: firstBatch
      })

      await store.updateHistory()
      expect(store.historyAssets).toHaveLength(200)
      expect(store.hasMoreHistory).toBe(true)

      // Second batch - different items
      const secondBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(200 + i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: secondBatch
      })

      await store.loadMoreHistory()

      expect(api.getHistory).toHaveBeenCalledWith(200, { offset: 200 })
      expect(store.historyAssets).toHaveLength(400) // Accumulated
      expect(store.hasMoreHistory).toBe(true)
    })

    it('should prevent duplicate items during pagination', async () => {
      // First batch - full BATCH_SIZE
      const firstBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: firstBatch
      })

      await store.updateHistory()
      expect(store.historyAssets).toHaveLength(200)

      // Second batch with some duplicates
      const secondBatch = [
        createMockHistoryItem(2), // Duplicate
        createMockHistoryItem(5), // Duplicate
        ...Array.from({ length: 198 }, (_, i) => createMockHistoryItem(200 + i)) // New
      ]
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: secondBatch
      })

      await store.loadMoreHistory()

      // Should only add new items (198 new, 2 duplicates filtered)
      expect(store.historyAssets).toHaveLength(398)

      // Verify no duplicates
      const assetIds = store.historyAssets.map((a) => a.id)
      const uniqueAssetIds = new Set(assetIds)
      expect(uniqueAssetIds.size).toBe(store.historyAssets.length)
    })

    it('should stop loading when no more items', async () => {
      // First batch - less than BATCH_SIZE
      const firstBatch = Array.from({ length: 50 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: firstBatch
      })

      await store.updateHistory()
      expect(store.hasMoreHistory).toBe(false)

      // Try to load more - should return early
      await store.loadMoreHistory()

      // Should only have been called once (initial load)
      expect(api.getHistory).toHaveBeenCalledTimes(1)
    })

    it('should handle race conditions with concurrent loads', async () => {
      // Setup initial state with full batch
      const initialBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: initialBatch
      })
      await store.updateHistory()
      expect(store.hasMoreHistory).toBe(true)

      // Clear mock to count only loadMore calls
      vi.mocked(api.getHistory).mockClear()

      // Setup slow API response
      let resolveLoadMore: (value: { History: HistoryTaskItem[] }) => void
      const loadMorePromise = new Promise<{ History: HistoryTaskItem[] }>(
        (resolve) => {
          resolveLoadMore = resolve
        }
      )
      vi.mocked(api.getHistory).mockReturnValueOnce(loadMorePromise)

      // Start first loadMore
      const firstLoad = store.loadMoreHistory()

      // Try concurrent load - should be ignored
      const secondLoad = store.loadMoreHistory()

      // Resolve
      const secondBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(200 + i)
      )
      resolveLoadMore!({ History: secondBatch })

      await Promise.all([firstLoad, secondLoad])

      // Only one API call
      expect(api.getHistory).toHaveBeenCalledTimes(1)
    })

    it('should respect MAX_HISTORY_ITEMS limit', async () => {
      const BATCH_COUNT = 6 // 6 × 200 = 1200 items

      // Initial load
      const firstBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: firstBatch
      })
      await store.updateHistory()

      // Load additional batches
      for (let batch = 1; batch < BATCH_COUNT; batch++) {
        const items = Array.from({ length: 200 }, (_, i) =>
          createMockHistoryItem(batch * 200 + i)
        )
        vi.mocked(api.getHistory).mockResolvedValueOnce({
          History: items
        })
        await store.loadMoreHistory()
      }

      // Should be capped at MAX_HISTORY_ITEMS (1000)
      expect(store.historyAssets).toHaveLength(1000)
    })
  })

  describe('Sorting', () => {
    it('should maintain date sorting after pagination', async () => {
      // First batch
      const firstBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: firstBatch
      })

      await store.updateHistory()

      // Second batch
      const secondBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(200 + i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: secondBatch
      })

      await store.loadMoreHistory()

      // Verify sorting (newest first - lower index = newer)
      for (let i = 1; i < store.historyAssets.length; i++) {
        const prevDate = new Date(store.historyAssets[i - 1].created_at)
        const currDate = new Date(store.historyAssets[i].created_at)
        expect(prevDate.getTime()).toBeGreaterThanOrEqual(currDate.getTime())
      }
    })
  })

  describe('Error Handling', () => {
    it('should preserve existing data when loadMore fails', async () => {
      // First successful load - full batch
      const firstBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: firstBatch
      })

      await store.updateHistory()
      expect(store.historyAssets).toHaveLength(200)

      // Second load fails
      const error = new Error('Network error')
      vi.mocked(api.getHistory).mockRejectedValueOnce(error)

      await store.loadMoreHistory()

      // Should keep existing data
      expect(store.historyAssets).toHaveLength(200)
      expect(store.historyError).toBe(error)
      expect(store.isLoadingMore).toBe(false)
    })

    it('should clear error state on successful retry', async () => {
      // First load succeeds
      const firstBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: firstBatch
      })

      await store.updateHistory()

      // Second load fails
      const error = new Error('Network error')
      vi.mocked(api.getHistory).mockRejectedValueOnce(error)

      await store.loadMoreHistory()
      expect(store.historyError).toBe(error)

      // Third load succeeds
      const thirdBatch = Array.from({ length: 200 }, (_, i) =>
        createMockHistoryItem(200 + i)
      )
      vi.mocked(api.getHistory).mockResolvedValueOnce({
        History: thirdBatch
      })

      await store.loadMoreHistory()

      // Error should be cleared
      expect(store.historyError).toBe(null)
      expect(store.historyAssets).toHaveLength(400)
    })

    it('should handle errors with proper loading state', async () => {
      const error = new Error('API error')
      vi.mocked(api.getHistory).mockRejectedValue(error)

      await store.updateHistory()

      expect(store.historyLoading).toBe(false)
      expect(store.historyError).toBe(error)
    })
  })

  describe('Memory Management', () => {
    it('should cleanup when exceeding MAX_HISTORY_ITEMS', async () => {
      // Load 1200 items (exceeds 1000 limit)
      const batches = 6

      for (let batch = 0; batch < batches; batch++) {
        const items = Array.from({ length: 200 }, (_, i) =>
          createMockHistoryItem(batch * 200 + i)
        )
        vi.mocked(api.getHistory).mockResolvedValueOnce({
          History: items
        })

        if (batch === 0) {
          await store.updateHistory()
        } else {
          await store.loadMoreHistory()
        }
      }

      // Should be limited to 1000
      expect(store.historyAssets).toHaveLength(1000)

      // All items should be unique (Set cleanup works)
      const assetIds = store.historyAssets.map((a) => a.id)
      const uniqueAssetIds = new Set(assetIds)
      expect(uniqueAssetIds.size).toBe(1000)
    })

    it('should maintain correct state after cleanup', async () => {
      // Load items beyond limit
      for (let batch = 0; batch < 6; batch++) {
        const items = Array.from({ length: 200 }, (_, i) =>
          createMockHistoryItem(batch * 200 + i)
        )
        vi.mocked(api.getHistory).mockResolvedValueOnce({
          History: items
        })

        if (batch === 0) {
          await store.updateHistory()
        } else {
          await store.loadMoreHistory()
        }
      }

      expect(store.historyAssets).toHaveLength(1000)

      // Should still maintain sorting
      for (let i = 1; i < store.historyAssets.length; i++) {
        const prevDate = new Date(store.historyAssets[i - 1].created_at)
        const currDate = new Date(store.historyAssets[i].created_at)
        expect(prevDate.getTime()).toBeGreaterThanOrEqual(currDate.getTime())
      }
    })
  })

  describe('jobDetailView Support', () => {
    it('should include outputCount and allOutputs in user_metadata', async () => {
      const mockHistory = Array.from({ length: 5 }, (_, i) =>
        createMockHistoryItem(i)
      )
      vi.mocked(api.getHistory).mockResolvedValue({
        History: mockHistory
      })

      await store.updateHistory()

      // Check first asset
      const asset = store.historyAssets[0]
      expect(asset.user_metadata).toBeDefined()
      expect(asset.user_metadata).toHaveProperty('outputCount')
      expect(asset.user_metadata).toHaveProperty('allOutputs')
      expect(Array.isArray(asset.user_metadata!.allOutputs)).toBe(true)
    })
  })
})