// ============================================================
// Prompts 页面测试
// ============================================================

import { describe, it, expect, beforeEach, afterEach } from 'vitest'
import { render, screen, waitFor } from '@testing-library/react'
import { http, HttpResponse } from 'msw'
import { setupServer } from 'msw/node'
import { QueryClient, QueryClientProvider } from '@tanstack/react-query'

import Prompts from '@/pages/Prompts'

// ── Mock data ────────────────────────────────────────────────

const mockPrompts = {
  items: [
    {
      id: 'pt-001',
      name: 'system-default',
      category: 'system',
      description: 'Default system prompt for all agents',
      source: 'builtin' as const,
      current_version: 3,
      status: 'active' as const,
      created_at: '2026-01-15T08:00:00Z',
      updated_at: '2026-03-20T12:00:00Z',
    },
    {
      id: 'pt-002',
      name: 'custom-research',
      category: 'tool',
      description: 'Custom research prompt template',
      source: 'custom' as const,
      current_version: 1,
      status: 'active' as const,
      created_at: '2026-03-01T10:00:00Z',
      updated_at: '2026-03-01T10:00:00Z',
    },
    {
      id: 'pt-003',
      name: 'legacy-summary',
      category: 'system',
      description: 'Legacy summary prompt',
      source: 'builtin' as const,
      current_version: 5,
      status: 'archived' as const,
      created_at: '2025-06-01T00:00:00Z',
      updated_at: '2026-02-28T00:00:00Z',
    },
  ],
  total: 3,
  page: 1,
  page_size: 20,
}

// ── MSW server ───────────────────────────────────────────────

const server = setupServer()

beforeEach(() => {
  server.listen({ onUnhandledRequest: 'bypass' })
})

afterEach(() => {
  server.close()
})

// ── Helper: render with QueryClient ──────────────────────────

function renderWithProviders(ui: React.ReactElement) {
  const queryClient = new QueryClient({
    defaultOptions: {
      queries: { retry: false },
    },
  })
  return render(
    <QueryClientProvider client={queryClient}>
      {ui}
    </QueryClientProvider>,
  )
}

// ── Tests ────────────────────────────────────────────────────

describe('Prompts page', () => {
  it('renders page title and create button', async () => {
    server.use(
      http.get('*/api/v1/prompts', () => {
        return HttpResponse.json(mockPrompts)
      }),
    )

    renderWithProviders(<Prompts />)

    expect(screen.getByText('提示词管理')).toBeInTheDocument()
    expect(screen.getByText('管理系统提示词模板和版本历史')).toBeInTheDocument()
    expect(screen.getByText('新建提示词')).toBeInTheDocument()
  })

  it('fetches and displays prompt templates', async () => {
    server.use(
      http.get('*/api/v1/prompts', () => {
        return HttpResponse.json(mockPrompts)
      }),
    )

    renderWithProviders(<Prompts />)

    await waitFor(() => {
      expect(screen.getByText('system-default')).toBeInTheDocument()
    })

    expect(screen.getByText('custom-research')).toBeInTheDocument()
    expect(screen.getByText('legacy-summary')).toBeInTheDocument()

    // Category "tool" appears once in data
    expect(screen.getByText('tool')).toBeInTheDocument()
  })

  it('shows loading spinner before data arrives', async () => {
    server.use(
      http.get('*/api/v1/prompts', async () => {
        await new Promise((resolve) => setTimeout(resolve, 500))
        return HttpResponse.json(mockPrompts)
      }),
    )

    renderWithProviders(<Prompts />)

    const spinner = document.querySelector('.ant-spin')
    expect(spinner).toBeTruthy()

    // Wait for loading to complete so afterEach cleanup is clean
    await waitFor(() => {
      expect(screen.getByText('system-default')).toBeInTheDocument()
    })
  })

  it('renders source as tag with correct labels', async () => {
    server.use(
      http.get('*/api/v1/prompts', () => {
        return HttpResponse.json(mockPrompts)
      }),
    )

    renderWithProviders(<Prompts />)

    await waitFor(() => {
      expect(screen.getByText('system-default')).toBeInTheDocument()
    })

    // sourceLabels: { builtin: '内置', custom: '自定义' }
    // '内置' appears twice (2 builtin items), '自定义' appears once
    const builtinTags = screen.getAllByText('内置')
    expect(builtinTags.length).toBe(2)
    expect(screen.getByText('自定义')).toBeInTheDocument()
  })

  it('shows error state on API failure', async () => {
    server.use(
      http.get('*/api/v1/prompts', () => {
        return HttpResponse.json(
          { error: 'internal_error', message: '获取提示词列表失败' },
          { status: 500 },
        )
      }),
    )

    renderWithProviders(<Prompts />)

    // React Query error propagation: ProTable receives empty data
    // but the query error should be visible via the table state
    // Check that no prompt names are rendered
    await waitFor(() => {
      expect(screen.queryByText('system-default')).not.toBeInTheDocument()
    })
  })
})