import {
  getOrderUpdateForDeliveryInvitationAction,
} from "../_shared/delivery-invitations.ts";
import { createServiceClient } from "../_shared/chatbot.ts";
import { insertIntegrationEvent } from "../_shared/integration-events.ts";
import {
  getCorsHeaders,
  jsonResponse,
  readJsonBody,
  requireRateLimit,
  verifyInternalRequest,
} from "../_shared/security.ts";

const MAX_BODY_BYTES = 16 * 1024;

type TransferBody = {
  orderId?: string;
  reason?: string;
  note?: string;
  targetStatus?: "Передан логисту" | "Платное хранение";
};

Deno.serve(async (request) => {
  if (request.method === "OPTIONS") {
    const corsHeaders = getCorsHeaders(request, "integration");
    return corsHeaders ? new Response("ok", { headers: corsHeaders }) : jsonResponse({ error: "Origin not allowed" }, 403);
  }

  if (request.method !== "POST") {
    return jsonResponse({ error: "Method not allowed" }, 405);
  }

  const corsHeaders = getCorsHeaders(request, "integration") || {};

  try {
    const { body, rawBody } = await readJsonBody<TransferBody>(request, {
      maxBytes: MAX_BODY_BYTES,
    });
    await verifyInternalRequest(request, rawBody, { rawBody });

    if (!body.orderId) {
      return jsonResponse({ error: "orderId is required" }, 400, corsHeaders);
    }

    try {
      requireUuid(body.orderId, "orderId");
    } catch (e) {
      return jsonResponse({ ok: false, error: (e as Error).message }, 400, corsHeaders);
    }

    const supabase = createServiceClient();
    await requireRateLimit(supabase, {
      scope: "delivery-transfer",
      key: body.orderId,
      maxCount: 10,
      windowSeconds: 600,
      blockSeconds: 1800,
    });

    const { data: currentOrder, error: orderError } = await supabase
      .from("orders")
      .select("id, status, delivery_agreement_status")
      .eq("id", body.orderId)
      .single();

    if (orderError) {
      throw orderError;
    }

    const targetStatus = body.targetStatus || "Передан логисту";
    const action = targetStatus === "Платное хранение" ? "mark_paid_storage" : "transfer_to_logistics";
    const orderUpdate = getOrderUpdateForDeliveryInvitationAction(action);

    const { error: invitationError } = await supabase
      .from("delivery_invitations")
      .update({
        state: targetStatus === "Платное хранение" ? "paid_storage" : "transferred_to_logistics",
        ...(targetStatus === "Платное хранение"
          ? { paid_storage_at: new Date().toISOString() }
          : { logistics_transferred_at: new Date().toISOString() }),
      })
      .eq("order_id", body.orderId);

    if (invitationError) {
      throw invitationError;
    }

      const { error: updateError } = await supabase
      .from("orders")
      .update({
        status: orderUpdate?.status,
        delivery_agreement_status: orderUpdate?.deliveryAgreementStatus,
      })
      .eq("id", body.orderId);

    if (updateError) {
      throw updateError;
    }

      const { error: historyError } = await supabase.from("order_history").insert({
      order_id: body.orderId,
      action: targetStatus === "Платное хранение" ? "Перевод на платное хранение" : "Передача заказа логисту",
      old_status: currentOrder.status,
      new_status: orderUpdate?.status,
      metadata: {
        old_delivery_agreement_status: currentOrder.delivery_agreement_status,
        new_delivery_agreement_status: orderUpdate?.deliveryAgreementStatus,
        reason: body.reason || null,
        note: body.note || null,
        target_status: targetStatus,
      },
    });

    if (historyError) {
      throw historyError;
    }

    await insertIntegrationEvent(supabase, {
      order_id: body.orderId,
      event_type:
        targetStatus === "Платное хранение" ? "delivery_paid_storage_requested" : "delivery_transfer_to_logistics",
      direction: "internal",
      status: "success",
      payload: {
        reason: body.reason || null,
        note: body.note || null,
        target_status: targetStatus,
      },
    });

    return jsonResponse(
      {
        ok: true,
        orderId: body.orderId,
        status: orderUpdate?.status,
        deliveryAgreementStatus: orderUpdate?.deliveryAgreementStatus,
      },
      200,
      corsHeaders,
    );
  } catch (error) {
    if (error instanceof Error && "status" in error) {
      const httpError = error as { status: number; message: string };
      return jsonResponse({ ok: false, error: httpError.message }, httpError.status, corsHeaders);
    }

    return jsonResponse(
      {
        ok: false,
        error: error instanceof Error ? error.message : "Unexpected error",
      },
      500,
      corsHeaders,
    );
  }
});