import { type ActionFunctionArgs, json } from "@remix-run/server-runtime";
import { type CompleteWaitpointTokenResponseBody, stringifyIO } from "@trigger.dev/core/v3";
import { WaitpointId } from "@trigger.dev/core/v3/isomorphic";
import { z } from "zod";
import {
  $replica,
  type PrismaReplicaClient,
  runOpsNewReplica,
  runOpsSplitReadEnabled,
} from "~/db.server";
import { env } from "~/env.server";
import { processWaitpointCompletionPacket } from "~/runEngine/concerns/waitpointCompletionPacket.server";
import { resolveWaitpointThroughReadThrough } from "~/runEngine/concerns/resolveWaitpointThroughReadThrough.server";
import { verifyHttpCallbackHash } from "~/services/httpCallback.server";
import { logger } from "~/services/logger.server";
import { controlPlaneResolver } from "~/v3/runOpsMigration/controlPlaneResolver.server";
import { engine } from "~/v3/runEngine.server";

const paramsSchema = z.object({
  waitpointFriendlyId: z.string(),
  hash: z.string(),
});

export async function action({ request, params }: ActionFunctionArgs) {
  if (request.method.toUpperCase() !== "POST") {
    return json({ error: "Method not allowed" }, { status: 405, headers: { Allow: "POST" } });
  }

  const contentLength = request.headers.get("content-length");
  if (!contentLength) {
    return json({ error: "Content-Length header is required" }, { status: 411 });
  }

  if (parseInt(contentLength) > env.TASK_PAYLOAD_MAXIMUM_SIZE) {
    return json({ error: "Request body too large" }, { status: 413 });
  }

  const { waitpointFriendlyId, hash } = paramsSchema.parse(params);
  const waitpointId = WaitpointId.toId(waitpointFriendlyId);

  try {
    // Resolve wherever the waitpoint resides. The env is resolved below from the row; residency
    // is classified off the waitpoint id, so env "" is fine. Fan-out reads the run-ops replica
    // first, then the control-plane replica so both a co-located and a standalone token resolve,
    // gated on the URL-presence read gate so the fan-out spans both DBs independent of the mint flag.
    const waitpoint = await resolveWaitpointThroughReadThrough({
      waitpointId,
      environmentId: "",
      read: (client: PrismaReplicaClient) =>
        client.waitpoint.findFirst({
          where: {
            id: waitpointId,
          },
          select: { id: true, status: true, environmentId: true },
        }),
      deps: {
        newClient: runOpsNewReplica,
        legacyReplica: $replica,
        splitEnabled: runOpsSplitReadEnabled,
      },
    });

    if (!waitpoint) {
      return json({ error: "Waitpoint not found" }, { status: 404 });
    }

    const environment = await controlPlaneResolver.resolveAuthenticatedEnv(waitpoint.environmentId);

    if (!environment) {
      return json({ error: "Waitpoint not found" }, { status: 404 });
    }

    if (
      !verifyHttpCallbackHash(
        waitpoint.id,
        hash,
        environment.parentEnvironment?.apiKey ?? environment.apiKey
      )
    ) {
      return json({ error: "Invalid URL, hash doesn't match" }, { status: 401 });
    }

    if (waitpoint.status === "COMPLETED") {
      return json<CompleteWaitpointTokenResponseBody>({
        success: true,
      });
    }

    // If the request body is not valid JSON, return an empty object
    const body = await request.json().catch(() => ({}));

    const stringifiedData = await stringifyIO(body);
    const finalData = await processWaitpointCompletionPacket(
      stringifiedData,
      environment,
      `${WaitpointId.toFriendlyId(waitpointId)}/http-callback`
    );

    const _result = await engine.completeWaitpoint({
      id: waitpointId,
      output: finalData.data
        ? { type: finalData.dataType, value: finalData.data, isError: false }
        : undefined,
    });

    return json<CompleteWaitpointTokenResponseBody>(
      {
        success: true,
      },
      { status: 200 }
    );
  } catch (error) {
    logger.error("Failed to complete HTTP callback", { error });
    throw json({ error: "Failed to complete HTTP callback" }, { status: 500 });
  }
}