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

vi.mock('../src/utils/toast.js', () => ({ toast: vi.fn() }))

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)),
    }
  })
}

// Every suggestion is a canonical DB tag now (tagging-v2): a real id, flagged
// above/below its head's suggest threshold. No raw / creates-new / alias cases.
const sugg = (over = {}) => ({
  canonical_tag_id: 7,
  display_name: 'Ichigo',
  category: 'character',
  score: 0.9,
  source: 'head',
  above_threshold: true,
  rejected: false,
  ...over,
})

// Seed the store through its single load() so currentImageId is set the way the
// panel sets it (accept() derives the image from it).
async function seed(store, byCategory) {
  stubFetch(() => ({ status: 200, body: { by_category: byCategory } }))
  await store.load(1)
}

describe('suggestions store: load derives aboveByCategory', () => {
  beforeEach(() => setActivePinia(createPinia()))
  afterEach(() => vi.restoreAllMocks())

  it('one fetch backs both surfaces: byCategory is the full set, aboveByCategory the panel subset', async () => {
    const s = useSuggestionsStore()
    await seed(s, {
      general: [
        sugg({ canonical_tag_id: 1, display_name: 'sword', category: 'general' }),
        sugg({ canonical_tag_id: 2, display_name: 'faint', category: 'general', above_threshold: false }),
      ],
    })
    expect(s.byCategory.general).toHaveLength(2)          // dropdown sees all
    expect(s.aboveByCategory.general).toHaveLength(1)      // panel sees above-threshold only
    expect(s.aboveByCategory.general[0].display_name).toBe('sword')
  })
})

describe('suggestions store: findPending (manual add == accept, 2026-07-03)', () => {
  beforeEach(() => setActivePinia(createPinia()))
  afterEach(() => vi.restoreAllMocks())

  it('matches by canonical tag id', async () => {
    const s = useSuggestionsStore()
    await seed(s, { character: [sugg()] })
    expect(s.findPending('general', 'unrelated', 7)?.display_name).toBe('Ichigo')
  })

  it('matches by kind + name, case-insensitively', async () => {
    const s = useSuggestionsStore()
    await seed(s, {
      general: [sugg({ canonical_tag_id: 12, display_name: 'Holding Sword', category: 'general' })],
    })
    expect(s.findPending('general', 'holding sword')?.canonical_tag_id).toBe(12)
    // Kind must match: same name under another kind is a different tag.
    expect(s.findPending('character', 'holding sword')).toBeNull()
  })

  it('skips rejected rows and returns null when nothing matches', async () => {
    const s = useSuggestionsStore()
    await seed(s, { character: [sugg({ rejected: true })] })
    expect(s.findPending('character', 'Ichigo', 7)).toBeNull()
    expect(s.findPending('character', 'Rukia')).toBeNull()
  })
})

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

  it('POSTs only the accept endpoint (canonical id) and drops the row', async () => {
    const s = useSuggestionsStore()
    await seed(s, { character: [sugg()] })
    const calls = []
    stubFetch((url, init) => {
      calls.push({ url, method: init?.method, body: init?.body })
      return { status: 200, body: { accepted: true, tag_id: 7 } }
    })
    await s.accept(s.byCategory.character[0])
    expect(calls).toHaveLength(1)
    expect(calls[0].url).toContain('/api/images/1/suggestions/accept')
    expect(JSON.parse(calls[0].body)).toEqual({ tag_id: 7 })
    expect(s.byCategory.character).toHaveLength(0)
  })

  it('honors a known tagId and still drops the row by the suggestion identity', async () => {
    // TagPanel's manual-add-matches-suggestion path passes the resolved tag id;
    // accept sends exactly it and drops the original suggestion row (which keys
    // off the suggestion object, not the passed id).
    const s = useSuggestionsStore()
    await seed(s, { general: [sugg({ canonical_tag_id: 12, display_name: 'Holding Sword', category: 'general' })] })
    const calls = []
    stubFetch((url, init) => {
      calls.push({ url, body: init?.body })
      return { status: 200, body: { accepted: true, tag_id: 42 } }
    })
    await s.accept(s.byCategory.general[0], { tagId: 42 })
    expect(calls).toHaveLength(1)
    expect(calls[0].url).toContain('/api/images/1/suggestions/accept')
    expect(JSON.parse(calls[0].body)).toEqual({ tag_id: 42 })
    expect(s.byCategory.general).toHaveLength(0)
  })
})