import type { CollectionAfterChangeHook, CollectionConfig } from "payload";
import { isAdmin } from "@/access";
import { conversationReplyEmail } from "@/lib/email/conversationTemplates";
import { sendEmail } from "@/lib/email/sendBookingEmails";

const sendAdminReply: CollectionAfterChangeHook = async ({ doc, operation, req }) => {
  if (operation !== "create" || doc.senderType !== "admin") return doc;

  try {
    const conversation = await req.payload.findByID({
      collection: "conversations",
      id: typeof doc.conversation === "object" ? doc.conversation.id : doc.conversation,
      depth: 0,
      req,
    });
    const adminUser = req.user?.collection === "users" ? req.user : null;
    await sendEmail(
      conversation.email,
      conversationReplyEmail({
        name: conversation.name,
        subject: conversation.subject,
        body: doc.body,
        senderName: doc.senderName || adminUser?.name || "Anouma",
        threadKey: conversation.threadKey,
      }),
      { replyTo: process.env.INBOUND_REPLY_TO || "reply-to@anouma.org" },
    );
    await req.payload.update({
      collection: "conversations",
      id: conversation.id,
      req,
      data: { status: "waiting", lastMessageAt: new Date().toISOString() },
    });
  } catch (err) {
    req.payload.logger.error({ err, msg: "conversation admin reply email failed" });
  }

  return doc;
};

export const ConversationMessages: CollectionConfig = {
  slug: "conversation-messages",
  labels: {
    singular: "Nachricht",
    plural: "Nachrichten",
  },
  admin: {
    useAsTitle: "body",
    defaultColumns: ["conversation", "senderType", "senderName", "createdAt"],
    group: "Kommunikation",
    description: "Einzelne Nachrichten innerhalb einer Anfrage. Antworten aus der Verwaltung werden automatisch per E-Mail verschickt.",
    hidden: true,
  },
  access: {
    read: isAdmin,
    create: isAdmin,
    update: isAdmin,
    delete: isAdmin,
  },
  timestamps: true,
  hooks: {
    afterChange: [sendAdminReply],
  },
  fields: [
    {
      name: "conversation",
      type: "relationship",
      relationTo: "conversations",
      label: "Anfrage",
      required: true,
      index: true,
    },
    {
      name: "senderType",
      type: "select",
      label: "Absenderart",
      required: true,
      defaultValue: "admin",
      options: [
        { label: "Anfragende Person", value: "visitor" },
        { label: "Anouma", value: "admin" },
      ],
      admin: { description: "Für Antworten aus der Verwaltung „Anouma“ auswählen. Eingehende E-Mails werden automatisch als anfragende Person gespeichert." },
    },
    { name: "senderName", type: "text", label: "Absendername" },
    { name: "senderEmail", type: "email", label: "Absender-E-Mail" },
    {
      name: "body",
      type: "textarea",
      label: "Nachricht",
      required: true,
      minLength: 1,
    },
    {
      name: "externalMessageId",
      type: "text",
      label: "Externe Nachrichten-ID",
      unique: true,
      index: true,
      admin: { position: "sidebar", readOnly: true },
    },
  ],
};