/*
 * SPEC: PJ2026-010103 HWPOD 服务。
 * 实现引用: draft-2026-07-20-hwpod-temporal-split。
 * 责任: 独立 HWPOD API HTTP 合同。
 */

import { validateHwpodOperationInput } from "./contracts.ts";

export function createHwpodHttpApp(options: { runtimeApiUrl: string; runtimeApiAuthorization: string; temporal: any }) {
  return {
    async fetch(request: Request) {
      const url = new URL(request.url);
      try {
        if (url.pathname === "/health/live") return json(200, { ok: true, serviceId: "hwlab-hwpod-api", status: "live", valuesPrinted: false });
        if (url.pathname === "/health/ready") return readiness(options);
        if (url.pathname === "/v1/hwpod" && request.method === "GET") return json(200, { ok: true, serviceId: "hwlab-hwpod-api", executionAuthority: "temporal", runtimeApiUrl: options.runtimeApiUrl, valuesPrinted: false });
        if (url.pathname === "/v1/hwpod/specs" && request.method === "GET") return proxyGet(options.runtimeApiUrl, `/v1/hwpod/specs${url.search}`, options.runtimeApiAuthorization);
        if (url.pathname === "/v1/hwpod/topology" && request.method === "GET") return proxyGet(options.runtimeApiUrl, `/v1/hwpod/topology${url.search}`, options.runtimeApiAuthorization);
        if (url.pathname === "/v1/hwpod-node-ops" && request.method === "GET") return proxyGet(options.runtimeApiUrl, `/v1/hwpod-node-ops${url.search}`, options.runtimeApiAuthorization);
        if (url.pathname === "/v1/hwpod/operations" && request.method === "POST") {
          const body = await request.json();
          const input = validateHwpodOperationInput({ ...(body as any), runtimeApiUrl: options.runtimeApiUrl, authorization: options.runtimeApiAuthorization });
          const started = await options.temporal.start(input);
          return json(202, { ok: true, status: "accepted", operationId: input.operationId, ...started, authority: "hwpod-temporal", valuesPrinted: false });
        }
        const match = /^\/v1\/hwpod\/operations\/([^/]+)$/u.exec(url.pathname);
        if (match && request.method === "GET") {
          const operationId = decodeURIComponent(match[1]);
          const workflowId = `hwpod-operation-${operationId}`;
          const description = await options.temporal.describe(workflowId);
          const status = String((description as any)?.status?.name ?? (description as any)?.status ?? "RUNNING").toLowerCase();
          const result = /completed|failed|canceled/u.test(status) ? await options.temporal.result(workflowId).catch((error: any) => ({ ok: false, error: { code: error?.code ?? "hwpod_workflow_result_failed", message: error?.message ?? String(error) } })) : null;
          return json(200, { ok: true, operationId, workflowId, workflowRunId: (description as any)?.runId ?? null, status, result, valuesPrinted: false });
        }
        return json(404, { ok: false, error: { code: "hwpod_route_not_found", message: "HWPOD API route was not found" } });
      } catch (error: any) {
        const code = error?.code ?? "hwpod_http_error";
        return json(code.includes("not_found") ? 404 : 400, { ok: false, error: { code, message: error?.message ?? String(error) }, valuesPrinted: false });
      }
    },
    close: async () => options.temporal.close()
  };
}

async function readiness(options: { runtimeApiUrl: string; runtimeApiAuthorization: string; temporal: any }) {
  try { const response = await fetch(`${options.runtimeApiUrl}/v1/hwpod/topology?resource=node&limit=1`, { headers: { authorization: options.runtimeApiAuthorization }, signal: AbortSignal.timeout(5000) }); return json(response.ok ? 200 : 503, { ok: response.ok, serviceId: "hwlab-hwpod-api", temporal: "configured", runtimeApi: response.ok ? "reachable" : "unreachable", valuesPrinted: false }); }
  catch { return json(503, { ok: false, serviceId: "hwlab-hwpod-api", temporal: "configured", runtimeApi: "unreachable", valuesPrinted: false }); }
}
async function proxyGet(base: string, route: string, authorization: string) { const response = await fetch(`${base}${route}`, { headers: { authorization }, signal: AbortSignal.timeout(10_000) }); return new Response(await response.text(), { status: response.status, headers: { "content-type": response.headers.get("content-type") ?? "application/json", "cache-control": "no-store" } }); }
function json(status: number, body: unknown) { return Response.json(body, { status, headers: { "cache-control": "no-store" } }); }