import { QueryClient, VueQueryPlugin } from '@tanstack/vue-query'
import { mount } from '@vue/test-utils'
import { beforeEach, describe, expect, it, vi } from 'vitest'
import { defineComponent, h, ref } from 'vue'
import { ZodError } from 'zod'
import { apiClient } from '@/lib/axios'
import { useTimetableMutations } from '@/composables/api/useTimetableMutations'

vi.mock('@/lib/axios', () => {
  const post = vi.fn()
  const put = vi.fn()
  const get = vi.fn()
  const del = vi.fn()

  return { apiClient: { post, put, get, delete: del } }
})

interface MockApi {
  post: ReturnType<typeof vi.fn>
  put: ReturnType<typeof vi.fn>
  get: ReturnType<typeof vi.fn>
  delete: ReturnType<typeof vi.fn>
}

const mocked = apiClient as unknown as MockApi

function mountWithMutations() {
  const api: { value: ReturnType<typeof useTimetableMutations> | null } = { value: null }
  const orgId = ref('org_1')
  const eventId = ref('ev_1')
  const dayId = ref<string | null>('day_1')

  const Host = defineComponent({
    setup() {
      api.value = useTimetableMutations({ orgId, eventId, dayId })

      return () => h('div')
    },
  })

  const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false }, mutations: { retry: false } } })

  mount(Host, { global: { plugins: [[VueQueryPlugin, { queryClient }]] } })

  return { api }
}

describe('Zod parse failure on API responses', () => {
  beforeEach(() => vi.clearAllMocks())

  it('move() throws a ZodError when the success payload omits required fields', async () => {
    // Backend renamed `cascaded` → `cascadedItems`, or removed `version`, etc.
    // Whatever the drift, our Zod schema must reject it loudly so GlitchTip
    // sees a contract violation instead of silently coercing into runtime
    // crashes deep in components that read `.lane_resolved`.
    mocked.post.mockResolvedValueOnce({
      data: {
        success: true,
        data: {
          moved: { id: 'p1' /* missing nearly every required field */ },
          cascaded: [],
        },
      },
    })

    const { api } = mountWithMutations()

    await expect(api.value!.move.mutateAsync({
      payload: {
        performance_id: 'p1',
        target_stage_id: 's1',
        target_start_at: '2026-07-10 19:00:00',
        target_end_at: '2026-07-10 20:00:00',
        target_lane: 0,
        version: 3,
      },
      idempotencyKey: 'idem-test',
    })).rejects.toBeInstanceOf(ZodError)
  })

  it('move() 409 with malformed errors payload also throws a ZodError', async () => {
    // The 409 path parses err.response.data.errors against
    // moveTimetableConflictSchema. A drift in the conflict shape (e.g.
    // backend renames `current_version` → `currentVersion`) must surface as
    // a ZodError, not as a "missing field" ReferenceError downstream.
    mocked.post.mockRejectedValueOnce({
      response: {
        status: 409,
        data: {
          errors: {
            conflict: 'version_mismatch',

            // current_version + client_version + server_data are missing
          },
        },
      },
    })

    const { api } = mountWithMutations()

    await expect(api.value!.move.mutateAsync({
      payload: {
        performance_id: 'p1',
        target_stage_id: 's1',
        target_start_at: '2026-07-10 19:00:00',
        target_end_at: '2026-07-10 20:00:00',
        target_lane: 0,
        version: 3,
      },
      idempotencyKey: 'idem-test',
    })).rejects.toBeInstanceOf(ZodError)
  })

  it('createStage() throws a ZodError when response is malformed', async () => {
    mocked.post.mockResolvedValueOnce({
      data: {
        success: true,
        data: { id: 's2', name: 'X' /* missing color, sort_order, etc. */ },
      },
    })

    const { api } = mountWithMutations()

    await expect(
      api.value!.createStage.mutateAsync({ name: 'X', color: '#aabbcc' }),
    ).rejects.toBeInstanceOf(ZodError)
  })
})