import { describe, expect, it, vi } from 'vitest'

import { getMockTools, MOCK_NOTEBOOKS_DATA } from './mock-tools'
import { getNotebookTools } from './notebook-tools'
import type { AgentNotebook } from '@/data/content/notebooks/notebook-schema'
import { createSearchDocsTool } from '@/lib/ai/tools/search-docs-tool'
import type * as SearchDocsToolModule from '@/lib/ai/tools/search-docs-tool'

// search_docs normally fetches the live docs GraphQL schema on construction
// (see search-docs-tool.ts), which would make every test in this file depend
// on the public docs API. Mock it with a deterministic local fixture instead
// — live connectivity (including the schema fetch) is covered separately by
// evals/preflight.ts. The regression-guard test below overrides this default
// to verify the missing-tool guard fires.
vi.mock('@/lib/ai/tools/search-docs-tool', () => ({
  createSearchDocsTool: vi.fn().mockResolvedValue({
    description: 'Search the Supabase documentation using GraphQL.',
    execute: async () => ({ content: [{ type: 'text' as const, text: '{}' }] }),
  } as unknown as SearchDocsToolModule.SearchDocsTool),
}))

describe('ai/tools/mock-tools getMockTools', () => {
  it('wires the mocked search_docs tool through from the shared module, alongside the deterministic mocks', async () => {
    const result = await getMockTools(undefined)

    // The mocked tool, wired through from the shared module
    expect(result.search_docs).toBeDefined()
    expect(result.search_docs.description).toContain('Search the Supabase documentation')
    expect(typeof result.search_docs.execute).toBe('function')
    // A couple of the deterministic mocks, to confirm the merge
    expect(result).toHaveProperty('list_tables')
    expect(result).toHaveProperty('query_logs')
  })

  // This is the regression guard: if a refactor stops sourcing search_docs
  // (drops it from getMockTools, or createSearchDocsTool breaks), fail loudly
  // in normal CI instead of only surfacing during an opt-in Braintrust eval run.
  it('throws a clear error when search_docs is missing from the harness tools', async () => {
    vi.mocked(createSearchDocsTool).mockResolvedValueOnce(
      undefined as unknown as SearchDocsToolModule.SearchDocsTool
    )

    await expect(getMockTools(undefined)).rejects.toThrow(
      'search_docs tool is missing from the eval harness'
    )
  })

  describe('notebook tools', () => {
    const AUTH_HEALTH_NOTEBOOK_ID = MOCK_NOTEBOOKS_DATA[0].id
    const EDGE_FUNCTION_NOTEBOOK_ID = MOCK_NOTEBOOKS_DATA[1].id

    it('list_notebooks reflects the two seeded fixtures', async () => {
      const mockTools = await getMockTools(undefined)
      if (!mockTools.list_notebooks.execute) throw new Error('execute is undefined')

      const result = await mockTools.list_notebooks.execute(
        { limit: 20 },
        { toolCallId: 'test', messages: [], context: {} }
      )

      expect(result.notebooks.map((notebook) => notebook.name)).toEqual([
        'Auth health check',
        'Edge function error triage',
      ])
      expect(result.notebooks.map((notebook) => notebook.cell_count)).toEqual([3, 2])
      expect(result.notebooks[1].description).toBeUndefined()
      expect(result.cursor).toBeUndefined()
    })

    it('get_notebook resolves cells in order and rejects an unknown id', async () => {
      const mockTools = await getMockTools(undefined)
      if (!mockTools.get_notebook.execute) throw new Error('execute is undefined')

      const result = await mockTools.get_notebook.execute(
        { id: AUTH_HEALTH_NOTEBOOK_ID },
        { toolCallId: 'test', messages: [], context: {} }
      )

      expect(result.cells.map((cell) => cell._tag)).toEqual([
        'markdown_cell',
        'database_cell',
        'log_cell',
      ])

      const [, databaseCell, logCell] = result.cells
      if (databaseCell._tag !== 'database_cell') throw new Error('expected database_cell')
      if (logCell._tag !== 'log_cell') throw new Error('expected log_cell')

      expect(databaseCell.sql).toContain('signups')
      expect(databaseCell.row_limit).toBe(30)
      expect(logCell.time_range).toEqual({ _tag: 'relative_time_range', unit: 'hour', amount: 1 })

      await expect(
        mockTools.get_notebook.execute(
          { id: 'unknown-notebook-id' },
          { toolCallId: 'test', messages: [], context: {} }
        )
      ).rejects.toThrow(/not found/i)
    })

    it('shares deterministic run_notebook output with eval models', async () => {
      const mockTools = await getMockTools(undefined)
      if (!mockTools.run_notebook.execute) throw new Error('execute is undefined')
      if (!mockTools.run_notebook.toModelOutput) throw new Error('toModelOutput is undefined')

      const output = await mockTools.run_notebook.execute(
        { id: AUTH_HEALTH_NOTEBOOK_ID, expected_updated_at: MOCK_NOTEBOOKS_DATA[0].updated_at },
        { toolCallId: 'test', messages: [], context: {} }
      )
      const modelOutput = mockTools.run_notebook.toModelOutput({
        toolCallId: 'test',
        input: { id: AUTH_HEALTH_NOTEBOOK_ID, expected_updated_at: output.updated_at },
        output,
      })

      expect(modelOutput).toMatchObject({
        type: 'json',
        value: {
          cells: expect.arrayContaining([expect.objectContaining({ rows: [] })]),
        },
      })
    })

    it('overrides create_notebook needsApproval to false, unlike the real tool', async () => {
      const mockTools = await getMockTools(undefined)

      expect(getNotebookTools().create_notebook.needsApproval).toBe(true)
      expect(mockTools.create_notebook.needsApproval).toBe(false)
    })

    it('create_notebook stores a new notebook visible via get_notebook and list_notebooks', async () => {
      const mockTools = await getMockTools(undefined)
      if (!mockTools.create_notebook.execute) throw new Error('execute is undefined')
      if (!mockTools.get_notebook.execute) throw new Error('execute is undefined')
      if (!mockTools.list_notebooks.execute) throw new Error('execute is undefined')

      const content: AgentNotebook = {
        schema_version: 1,
        cells: [
          { _tag: 'markdown_cell', text: '# New notebook' },
          { _tag: 'database_cell', sql: 'select 1', row_limit: 10 },
        ],
      }

      const created = await mockTools.create_notebook.execute(
        { name: 'New notebook', content },
        { toolCallId: 'test', messages: [], context: {} }
      )
      expect(created).toEqual({ id: expect.any(String), name: 'New notebook' })

      const fetched = await mockTools.get_notebook.execute(
        { id: created.id },
        { toolCallId: 'test', messages: [], context: {} }
      )
      expect(fetched.cells).toHaveLength(2)
      expect(fetched.cells.every((cell) => typeof cell._id === 'string')).toBe(true)

      const listed = await mockTools.list_notebooks.execute(
        { limit: 20 },
        { toolCallId: 'test', messages: [], context: {} }
      )
      expect(listed.notebooks).toHaveLength(3)
      const newEntry = listed.notebooks.find((notebook) => notebook.id === created.id)
      expect(newEntry?.cell_count).toBe(2)
    })

    it('overrides update_notebook needsApproval to false, unlike the real tool', async () => {
      const mockTools = await getMockTools(undefined)

      expect(getNotebookTools().update_notebook.needsApproval).toBe(true)
      expect(mockTools.update_notebook.needsApproval).toBe(false)
    })

    it('update_notebook inserts and deletes cells, and list_notebooks reflects the new cell count', async () => {
      const mockTools = await getMockTools(undefined)
      if (!mockTools.get_notebook.execute) throw new Error('execute is undefined')
      if (!mockTools.update_notebook.execute) throw new Error('execute is undefined')
      if (!mockTools.list_notebooks.execute) throw new Error('execute is undefined')

      const before = await mockTools.get_notebook.execute(
        { id: AUTH_HEALTH_NOTEBOOK_ID },
        { toolCallId: 'test', messages: [], context: {} }
      )
      const [markdownCell, , logCell] = before.cells

      const result = await mockTools.update_notebook.execute(
        {
          id: AUTH_HEALTH_NOTEBOOK_ID,
          expected_updated_at: before.updated_at,
          operations: [
            {
              _tag: 'insert_cell',
              after_cell_id: markdownCell._id,
              cell: { _tag: 'database_cell', sql: 'select 1', row_limit: 10 },
            },
            { _tag: 'delete_cell', cell_id: logCell._id },
          ],
        },
        { toolCallId: 'test', messages: [], context: {} }
      )
      expect(result).toEqual({ id: AUTH_HEALTH_NOTEBOOK_ID, name: 'Auth health check' })

      const after = await mockTools.get_notebook.execute(
        { id: AUTH_HEALTH_NOTEBOOK_ID },
        { toolCallId: 'test', messages: [], context: {} }
      )
      expect(after.cells.map((cell) => cell._tag)).toEqual([
        'markdown_cell',
        'database_cell',
        'database_cell',
      ])

      const listed = await mockTools.list_notebooks.execute(
        { limit: 20 },
        { toolCallId: 'test', messages: [], context: {} }
      )
      const entry = listed.notebooks.find((notebook) => notebook.id === AUTH_HEALTH_NOTEBOOK_ID)
      expect(entry?.cell_count).toBe(3)
    })

    it('update_notebook rejects an unknown cell_id without mutating the notebook', async () => {
      const mockTools = await getMockTools(undefined)
      if (!mockTools.get_notebook.execute) throw new Error('execute is undefined')
      if (!mockTools.update_notebook.execute) throw new Error('execute is undefined')

      const before = await mockTools.get_notebook.execute(
        { id: EDGE_FUNCTION_NOTEBOOK_ID },
        { toolCallId: 'test', messages: [], context: {} }
      )

      await expect(
        mockTools.update_notebook.execute(
          {
            id: EDGE_FUNCTION_NOTEBOOK_ID,
            expected_updated_at: before.updated_at,
            operations: [{ _tag: 'delete_cell', cell_id: 'does-not-exist' }],
          },
          { toolCallId: 'test', messages: [], context: {} }
        )
      ).rejects.toThrow(/does-not-exist/)

      const after = await mockTools.get_notebook.execute(
        { id: EDGE_FUNCTION_NOTEBOOK_ID },
        { toolCallId: 'test', messages: [], context: {} }
      )
      expect(after.cells.map((cell) => cell._tag)).toEqual(['markdown_cell', 'log_cell'])
    })

    it('overrides delete_notebook needsApproval to false, unlike the real tool', async () => {
      const mockTools = await getMockTools(undefined)

      expect(getNotebookTools().delete_notebook.needsApproval).toBe(true)
      expect(mockTools.delete_notebook.needsApproval).toBe(false)
    })

    it('delete_notebook removes the notebook, and list_notebooks no longer returns it', async () => {
      const mockTools = await getMockTools(undefined)
      if (!mockTools.delete_notebook.execute) throw new Error('execute is undefined')
      if (!mockTools.list_notebooks.execute) throw new Error('execute is undefined')

      const result = await mockTools.delete_notebook.execute(
        { id: AUTH_HEALTH_NOTEBOOK_ID },
        { toolCallId: 'test', messages: [], context: {} }
      )
      expect(result).toEqual({ id: AUTH_HEALTH_NOTEBOOK_ID, name: 'Auth health check' })

      const listed = await mockTools.list_notebooks.execute(
        { limit: 20 },
        { toolCallId: 'test', messages: [], context: {} }
      )
      expect(listed.notebooks.map((notebook) => notebook.id)).toEqual([EDGE_FUNCTION_NOTEBOOK_ID])
    })

    it('delete_notebook rejects an unknown id', async () => {
      const mockTools = await getMockTools(undefined)
      if (!mockTools.delete_notebook.execute) throw new Error('execute is undefined')

      await expect(
        mockTools.delete_notebook.execute(
          { id: 'unknown-notebook-id' },
          { toolCallId: 'test', messages: [], context: {} }
        )
      ).rejects.toThrow(/unknown-notebook-id/)
    })

    it('is isolated per call to getMockTools', async () => {
      const firstCall = await getMockTools(undefined)
      if (!firstCall.create_notebook.execute) throw new Error('execute is undefined')

      await firstCall.create_notebook.execute(
        {
          name: 'Ephemeral notebook',
          content: { schema_version: 1, cells: [{ _tag: 'markdown_cell', text: 'hi' }] },
        },
        { toolCallId: 'test', messages: [], context: {} }
      )

      const secondCall = await getMockTools(undefined)
      if (!secondCall.list_notebooks.execute) throw new Error('execute is undefined')

      const result = await secondCall.list_notebooks.execute(
        { limit: 20 },
        { toolCallId: 'test', messages: [], context: {} }
      )
      expect(result.notebooks.map((notebook) => notebook.name)).toEqual([
        'Auth health check',
        'Edge function error triage',
      ])
    })
  })
})