// modules/helpdesk/helpdesk.contact.service.ts
import { FastifyInstance } from 'fastify'

export async function getOrCreateContact(
    server: FastifyInstance,
    tenant_id: number,
    { email, phone, display_name, customer_id, contact_id }: { email?: string; phone?: string; display_name?: string; customer_id?: number; contact_id?: number }
) {
    if (!email && !phone) throw new Error('Contact must have at least an email or phone')

    // Bestehenden Kontakt prüfen
    const { data: existing, error: findError } = await server.supabase
        .from('helpdesk_contacts')
        .select('*')
        .eq('tenant_id', tenant_id)
        .or(`email.eq.${email || ''},phone.eq.${phone || ''}`)
        .maybeSingle()

    if (findError) throw findError
    if (existing) return existing

    // Anlegen
    const { data: created, error: insertError } = await server.supabase
        .from('helpdesk_contacts')
        .insert({
            tenant_id,
            email,
            phone,
            display_name,
            customer_id,
            contact_id
        })
        .select()
        .single()

    if (insertError) throw insertError
    return created
}