import {
  channelFromProvider,
  createServiceClient,
  json,
  normalizeIncomingEvent,
  orderUpdateByAction,
  type ProviderName,
} from "../_shared/chatbot.ts";

const corsHeaders = {
  "Access-Control-Allow-Origin": "*",
  "Access-Control-Allow-Headers": "authorization, x-client-info, apikey, content-type",
};

Deno.serve(async (request) => {
  if (request.method === "OPTIONS") {
    return new Response("ok", { headers: corsHeaders });
  }

  try {
    const url = new URL(request.url);
    const provider = url.searchParams.get("provider") as ProviderName | null;
    if (!provider) {
      return json({ error: "provider is required" }, 400);
    }

    const body = (await request.json()) as Record<string, unknown>;
    const event = normalizeIncomingEvent(provider, body);
    if (!event.orderId) {
      return json({ error: "order_id is required" }, 400);
    }

    const supabase = createServiceClient();
    const orderUpdate = orderUpdateByAction(event.action);

    const messagePayload = {
      order_id: event.orderId,
      sender_name: "chatbot-webhook",
      sender_type: event.senderType,
      channel: channelFromProvider(event.provider),
      text: event.text || `Inbound ${event.provider} event`,
      external_message_id: event.externalMessageId,
      payload: event.payload,
    };

    const { error: messageError } = await supabase.from("chat_messages").insert(messagePayload);
    if (messageError) {
      throw messageError;
    }

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

      if (orderError) {
        throw orderError;
      }

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

      if (updateError) {
        throw updateError;
      }

      const { error: historyError } = await supabase.from("order_history").insert({
        order_id: event.orderId,
        action: `Webhook ${provider}: ${event.action}`,
        old_status: currentOrder.status,
        new_status: orderUpdate.status,
        metadata: {
          ...event.payload,
          old_delivery_agreement_status: currentOrder.delivery_agreement_status,
          new_delivery_agreement_status: orderUpdate.deliveryAgreementStatus,
        },
      });

      if (historyError) {
        throw historyError;
      }
    }

    return new Response(JSON.stringify({ ok: true }), {
      headers: {
        ...corsHeaders,
        "Content-Type": "application/json",
      },
    });
  } catch (error) {
    return new Response(
      JSON.stringify({
        ok: false,
        error: error instanceof Error ? error.message : "Unexpected error",
      }),
      {
        status: 500,
        headers: {
          ...corsHeaders,
          "Content-Type": "application/json",
        },
      },
    );
  }
});