import { defineStore } from 'pinia'
import { ref } from 'vue'
import {
  listPublications,
  getPublication,
  createPublication,
  updatePublication,
  deletePublication,
  type Publication,
  type PublicationWriteDTO,
} from '../api/publications'

export const usePublicationStore = defineStore('publication', () => {
  const publications = ref<Publication[]>([])
  const current = ref<Publication | null>(null)
  const loading = ref(false)
  const error = ref<string | null>(null)

  async function fetchPublications() {
    loading.value = true
    error.value = null
    try {
      publications.value = await listPublications()
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'unknown error'
    } finally {
      loading.value = false
    }
  }

  async function fetchPublication(id: number) {
    loading.value = true
    error.value = null
    try {
      current.value = await getPublication(id)
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'unknown error'
      current.value = null
    } finally {
      loading.value = false
    }
  }

  async function create(dto: PublicationWriteDTO): Promise<Publication> {
    const pub = await createPublication(dto)
    publications.value = [pub, ...publications.value]
    return pub
  }

  async function update(id: number, dto: PublicationWriteDTO): Promise<Publication> {
    const pub = await updatePublication(id, dto)
    const idx = publications.value.findIndex((p) => p.id === id)
    if (idx !== -1) publications.value[idx] = pub
    if (current.value?.id === id) current.value = pub
    return pub
  }

  async function remove(id: number) {
    await deletePublication(id)
    publications.value = publications.value.filter((p) => p.id !== id)
    if (current.value?.id === id) current.value = null
  }

  return { publications, current, loading, error, fetchPublications, fetchPublication, create, update, remove }
})