/**
 * Composable for customer notes/comments management.
 */
import { ref, computed } from 'vue'
import { listDocs, updateDoc } from 'src/api/erp'
import { authFetch } from 'src/api/auth'
import { BASE_URL } from 'src/config/erpnext'

/**
 * @param {import('vue').Ref<Array>} comments - Reactive comments list
 * @param {import('vue').Ref<Object>} customer - Reactive customer object
 */
export function useCustomerNotes (comments, customer) {
  const newNote = ref('')
  const addingNote = ref(false)
  const noteInputFocused = ref(false)
  const editingNote = ref(null)

  const sortedComments = computed(() => {
    const pinned = comments.value.filter(c => c._sticky)
    const rest = comments.value.filter(c => !c._sticky)
    return [...pinned, ...rest]
  })

  async function addNote () {
    if (!newNote.value?.trim() || addingNote.value) return
    addingNote.value = true
    try {
      const body = {
        doctype: 'Comment', comment_type: 'Comment',
        reference_doctype: 'Customer', reference_name: customer.value.name,
        content: newNote.value.trim(),
      }
      const res = await authFetch(BASE_URL + '/api/resource/Comment', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(body),
      })
      if (res.ok) {
        const data = await res.json()
        comments.value.unshift(data.data)
        newNote.value = ''
        noteInputFocused.value = false
      }
    } catch {} finally {
      addingNote.value = false
    }
  }

  async function deleteNote (note) {
    try {
      const res = await authFetch(BASE_URL + '/api/resource/Comment/' + encodeURIComponent(note.name), { method: 'DELETE' })
      if (res.ok) {
        comments.value = comments.value.filter(c => c.name !== note.name)
      }
    } catch {}
  }

  function toggleStickyNote (note) {
    note._sticky = !note._sticky
  }

  async function saveEditNote (note, newContent) {
    if (!newContent?.trim()) return
    try {
      await updateDoc('Comment', note.name, { content: newContent.trim() })
      note.content = newContent.trim()
      editingNote.value = null
    } catch {}
  }

  function startEditNote (note) {
    editingNote.value = note.name
    note._editContent = note.content?.replace(/<[^>]*>/g, '') || ''
  }

  async function onNoteAdded () {
    try {
      comments.value = await listDocs('Comment', {
        filters: { reference_doctype: 'Customer', reference_name: customer.value?.name, comment_type: 'Comment' },
        fields: ['name', 'content', 'comment_by', 'creation'],
        limit: 50,
        orderBy: 'creation desc',
      })
    } catch {}
  }

  return {
    newNote,
    addingNote,
    noteInputFocused,
    editingNote,
    sortedComments,
    addNote,
    deleteNote,
    toggleStickyNote,
    saveEditNote,
    startEditNote,
    onNoteAdded,
  }
}