/**
 * Vitest unit tests for DocumentCard.vue — classification-failed badge
 * and reanalyze() handler.
 *
 * D-11 frontend coverage — CLAUDE.md mandate: every new component / function
 * must have at least one test.
 */

import { describe, it, expect, vi, beforeEach } from 'vitest'
import { mount, flushPromises } from '@vue/test-utils'

// ── Mock API client ───────────────────────────────────────────────────────────
vi.mock('../src/api/client.js', () => ({
  classifyDocument: vi.fn(() =>
    Promise.resolve({ document_id: 'd1', status: 'processing' })
  ),
  // Stub other imports so the component can load without Pinia
  moveDocument: vi.fn(() => Promise.resolve()),
}))

// ── Mock Pinia stores referenced by DocumentCard ──────────────────────────────
vi.mock('../src/stores/topics.js', () => ({
  useTopicsStore: () => ({ topics: [] }),
}))

vi.mock('../src/stores/folders.js', () => ({
  useFoldersStore: () => ({ rootFolders: [] }),
}))

// ── Mock child components ─────────────────────────────────────────────────────
vi.mock('../src/components/topics/TopicBadge.vue', () => ({
  default: { template: '<span></span>' },
}))

vi.mock('../src/components/sharing/ShareModal.vue', () => ({
  default: { template: '<div></div>' },
}))

// ── Mock formatters (used in template) ───────────────────────────────────────
vi.mock('../src/utils/formatters.js', () => ({
  formatDate: (v) => String(v),
  formatSize: (v) => String(v),
}))

// ── Import component and mock after all mocks are registered ─────────────────
import DocumentCard from '../src/components/documents/DocumentCard.vue'
import { classifyDocument } from '../src/api/client.js'

// ── Minimal doc fixture ───────────────────────────────────────────────────────
function makeDoc(overrides = {}) {
  return {
    id: 'd1',
    original_name: 'test.pdf',
    size_bytes: 1024,
    created_at: '2024-01-01T00:00:00Z',
    topics: [],
    is_shared: false,
    status: 'ready',
    ...overrides,
  }
}

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

describe('DocumentCard — classification_failed badge', () => {
  beforeEach(() => {
    vi.clearAllMocks()
  })

  it('renders Classification failed badge when status === "classification_failed"', () => {
    const wrapper = mount(DocumentCard, {
      props: { doc: makeDoc({ status: 'classification_failed' }) },
      global: { stubs: { RouterLink: true } },
    })

    expect(wrapper.text()).toContain('Classification failed')
    const btn = wrapper.find('button[disabled]') || wrapper.findAll('button').find(b => b.text().includes('Re-analyze'))
    expect(btn || wrapper.text()).toBeTruthy()
    expect(wrapper.text()).toContain('Re-analyze')
  })

  it('does NOT render the badge when status is "ready"', () => {
    const wrapper = mount(DocumentCard, {
      props: { doc: makeDoc({ status: 'ready' }) },
      global: { stubs: { RouterLink: true } },
    })

    expect(wrapper.text()).not.toContain('Classification failed')
    expect(wrapper.text()).not.toContain('Re-analyze')
  })

  it('does NOT render the badge when status is "processing"', () => {
    const wrapper = mount(DocumentCard, {
      props: { doc: makeDoc({ status: 'processing' }) },
      global: { stubs: { RouterLink: true } },
    })

    expect(wrapper.text()).not.toContain('Classification failed')
  })

  it('Re-analyze button calls classifyDocument(doc.id) and emits "reclassified"', async () => {
    const wrapper = mount(DocumentCard, {
      props: { doc: makeDoc({ status: 'classification_failed' }) },
      global: { stubs: { RouterLink: true } },
    })

    // Find the Re-analyze button
    const buttons = wrapper.findAll('button')
    const reanalyzeBtn = buttons.find(b => b.text().includes('Re-analyze'))
    expect(reanalyzeBtn).toBeTruthy()

    await reanalyzeBtn.trigger('click')
    await flushPromises()

    expect(classifyDocument).toHaveBeenCalledOnce()
    expect(classifyDocument).toHaveBeenCalledWith('d1')

    const emitted = wrapper.emitted('reclassified')
    expect(emitted).toBeTruthy()
    expect(emitted[0]).toEqual(['d1'])
  })
})