// ── Booking API — crée une demande client dans ERPNext ────────────────────────
import { BASE_URL } from 'src/config/erpnext'
import { getCSRF } from './auth'

const SLOT_LABELS = {
  matin: 'Matin (8h00 – 12h00)',
  aprem: 'Après-midi (12h00 – 17h00)',
  soir:  'Soirée (17h00 – 20h00)',
}

function buildDescription (data) {
  const dateLabel = { today: "Aujourd'hui", tomorrow: 'Demain' }[data.date] ?? data.date
  return [
    `SERVICE: ${data.service.label}`,
    data.serviceNote ? `Détail: ${data.serviceNote}` : null,
    `ADRESSE: ${data.address}`,
    `DATE: ${dateLabel} — ${SLOT_LABELS[data.slot] ?? data.slot}`,
    data.urgent ? '*** URGENT — intervention dans les 2h ***' : null,
    '---',
    `Client: ${data.contact.name}`,
    `Téléphone: ${data.contact.phone}`,
    data.contact.email ? `Courriel: ${data.contact.email}` : null,
    data.contact.note  ? `Note: ${data.contact.note}`    : null,
  ].filter(Boolean).join('\n')
}

function localRef () {
  return 'DSP-' + Date.now().toString(36).toUpperCase().slice(-6)
}

export async function createBooking (data) {
  const csrf = await getCSRF().catch(() => '')

  // Try ERPNext Lead (CRM module — standard in ERPNext)
  try {
    const r = await fetch(`${BASE_URL}/api/resource/Lead`, {
      method: 'POST',
      credentials: 'include',
      headers: { 'Content-Type': 'application/json', 'X-Frappe-CSRF-Token': csrf },
      body: JSON.stringify({
        lead_name:  data.contact.name,
        mobile_no:  data.contact.phone,
        email_id:   data.contact.email || '',
        source:     'Dispatch Booking',
        notes:      buildDescription(data),
        status:     'Open',
        lead_owner: '',
      }),
    })
    const body = await r.json().catch(() => ({}))
    if (r.ok && body.data?.name) return body.data.name
  } catch (_) { /* fall through */ }

  // Fallback: localStorage + generated ref
  const ref = localRef()
  const list = JSON.parse(localStorage.getItem('dispatch_bookings') || '[]')
  list.push({ ref, ...data, created: new Date().toISOString() })
  localStorage.setItem('dispatch_bookings', JSON.stringify(list))
  return ref
}