import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
import { setActivePinia, createPinia } from 'pinia'
import { useGallerySelectionStore } from '../src/stores/gallerySelection.js'

function stubFetch(handler) {
  globalThis.fetch = vi.fn(async (url, init) => {
    const { status, body } = handler(url, init)
    return {
      ok: status >= 200 && status < 300,
      status,
      statusText: String(status),
      text: async () => (body == null ? '' : JSON.stringify(body))
    }
  })
}

describe('gallerySelection store', () => {
  beforeEach(() => setActivePinia(createPinia()))
  afterEach(() => vi.restoreAllMocks())

  it('toggle adds/removes preserving order; count/isSelected track it', () => {
    const s = useGallerySelectionStore()
    s.toggle(5); s.toggle(9); s.toggle(2)
    expect(s.order).toEqual([5, 9, 2])
    expect(s.isSelected(9)).toBe(true)
    expect(s.count).toBe(3)
    s.toggle(9)
    expect(s.order).toEqual([5, 2])
    expect(s.isSelected(9)).toBe(false)
  })

  it('exitSelectMode clears selection and mode', () => {
    const s = useGallerySelectionStore()
    s.enterSelectMode(); s.toggle(1)
    expect(s.isSelectMode).toBe(true)
    s.exitSelectMode()
    expect(s.isSelectMode).toBe(false)
    expect(s.order).toEqual([])
  })

  it('bulkAdd posts the id list + source and refreshes', async () => {
    const s = useGallerySelectionStore()
    s.toggle(1); s.toggle(2)
    const calls = []
    stubFetch((url, init) => {
      calls.push({ url, body: JSON.parse(init.body) })
      if (url.includes('/bulk/tags')) return { status: 200, body: { added_count: 2, total: 2 } }
      if (url.includes('common-tags')) return { status: 200, body: { tags: [] } }
      if (url.includes('suggestions/bulk')) return { status: 200, body: { suggestions: {}, evaluated: 2, threshold: 0.8 } }
      return { status: 200, body: {} }
    })
    await s.bulkAdd(42, 'ml_accepted')
    const add = calls.find(c => c.url.includes('/api/images/bulk/tags'))
    expect(add.body).toEqual({ image_ids: [1, 2], tag_id: 42, source: 'ml_accepted' })
  })

  it('loadCommonTags stores returned tags', async () => {
    const s = useGallerySelectionStore()
    s.toggle(3)
    stubFetch(() => ({ status: 200, body: { tags: [{ id: 7, name: 'x', kind: 'general' }] } }))
    await s.loadCommonTags()
    expect(s.commonTags).toEqual([{ id: 7, name: 'x', kind: 'general' }])
  })
})
