import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
import { setActivePinia, createPinia } from 'pinia'
import { useSeriesManageStore, moveItem } from '../src/stores/seriesManage.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('seriesManage', () => {
  beforeEach(() => setActivePinia(createPinia()))
  afterEach(() => vi.restoreAllMocks())

  it('moveItem reorders immutably', () => {
    expect(moveItem([1, 2, 3, 4], 3, 0)).toEqual([4, 1, 2, 3])
    expect(moveItem([1, 2, 3], 0, 2)).toEqual([2, 3, 1])
  })

  it('load fetches pages + series', async () => {
    const s = useSeriesManageStore()
    stubFetch(() => ({
      status: 200,
      body: { series: { id: 7, name: 'V' },
              pages: [{ image_id: 1, page_number: 1, thumbnail_url: 't' }] }
    }))
    await s.load(7)
    expect(s.series).toEqual({ id: 7, name: 'V' })
    expect(s.pages.map(p => p.image_id)).toEqual([1])
  })

  it('reorder posts the full ordered id list', async () => {
    const s = useSeriesManageStore()
    s.tagId = 7
    s.pages = [{ image_id: 1 }, { image_id: 2 }, { image_id: 3 }]
    const calls = []
    stubFetch((url, init) => {
      calls.push({ url, body: init.body ? JSON.parse(init.body) : null })
      if (url.includes('/reorder')) return { status: 200, body: { ok: true } }
      return { status: 200, body: { series: { id: 7, name: 'V' }, pages: [] } }
    })
    await s.reorder([3, 1, 2])
    const r = calls.find(c => c.url.includes('/reorder'))
    expect(r.url).toContain('/api/series/7/reorder')
    expect(r.body).toEqual({ image_ids: [3, 1, 2] })
  })

  it('addSelected posts picker selection then reloads', async () => {
    const s = useSeriesManageStore()
    s.tagId = 7
    s.pickerSelection = [9, 10]
    const calls = []
    stubFetch((url, init) => {
      calls.push({ url, body: init.body ? JSON.parse(init.body) : null })
      if (url.includes('/pages') && init.method === 'POST')
        return { status: 200, body: { added_count: 2 } }
      return { status: 200, body: { series: { id: 7, name: 'V' }, pages: [] } }
    })
    await s.addSelected()
    const add = calls.find(c => c.url.endsWith('/api/series/7/pages'))
    expect(add.body).toEqual({ image_ids: [9, 10] })
    expect(s.pickerSelection).toEqual([])
  })
})