/**
 * store/templates.js
 * Pinia store — Email Templates domain
 */
import { defineStore } from 'pinia'
import { ref, computed } from 'vue'
import api from '@/api/index.js'

export const useTemplatesStore = defineStore('templates', () => {
  // ── State ────────────────────────────────────────────────────────────────
  const templates = ref([])
  const loading   = ref(false)
  const error     = ref('')

  // ── Getters ──────────────────────────────────────────────────────────────
  const count               = computed(() => templates.value.length)
  const notificationTemplates = computed(() => templates.value.filter(t => t.template_type === 'Notification'))
  const overdueTemplates      = computed(() => templates.value.filter(t => t.template_type === 'Overdue'))

  function nameById(id) {
    return templates.value.find(t => t.id === id)?.name ?? `#${id}`
  }

  // ── Actions ──────────────────────────────────────────────────────────────

  async function fetchAll() {
    loading.value = true
    error.value   = ''
    try {
      const { data } = await api.get('/templates')
      templates.value = data
    } catch (e) {
      error.value = e.response?.data?.detail ?? 'Failed to load email templates.'
    } finally {
      loading.value = false
    }
  }

  async function create(payload) {
    const { data } = await api.post('/templates', payload)
    templates.value.push(data)
    return data
  }

  async function update(id, payload) {
    const { data } = await api.put(`/templates/${id}`, payload)
    const idx = templates.value.findIndex(t => t.id === id)
    if (idx !== -1) templates.value[idx] = data
    return data
  }

  async function remove(id) {
    await api.delete(`/templates/${id}`)
    templates.value = templates.value.filter(t => t.id !== id)
  }

  return {
    templates, loading, error, count,
    notificationTemplates, overdueTemplates,
    nameById,
    fetchAll, create, update, remove,
  }
})