import crypto from "node:crypto";
import fs from "node:fs";
import path from "node:path";
import { spawnSync } from "node:child_process";
import { fileURLToPath } from "node:url";

const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
const abs = (file) => path.join(root, file);
const cachePath = abs("tests/golden/WBV2/context-cache.json");
const read = (file) => fs.readFileSync(abs(file), "utf8");
const digest = (value) => crypto.createHash("sha256").update(value).digest("hex");
const queue = read("docs/EXECUTION_QUEUE.md");
const task = process.argv.includes("--task")
  ? process.argv[process.argv.indexOf("--task") + 1]
  : queue.match(/\| 当前任务 \| `([^`]+)` \|/u)?.[1];
if (!task) throw new Error("unable to resolve current WBV2 task");
const parentManifest = queue.match(/\| parent manifest \| `([^`]+)` \|/u)?.[1];
if (!parentManifest) throw new Error("queue parent manifest is missing");
const inputPaths = [
  "docs/EXECUTION_QUEUE.md",
  `docs/tasks/${task}.md`,
  parentManifest,
  `tests/golden/${task}/task-context.json`,
];
const inputHash = digest(inputPaths.map((file) => `${file}\0${digest(read(file))}\n`).join(""));
let cached = null;
try { cached = JSON.parse(fs.readFileSync(cachePath, "utf8")); }
catch { /* First use or an interrupted write. */ }
if (!process.argv.includes("--force") && cached?.status === "PASS" && cached.task === task && cached.inputHash === inputHash) {
  process.stdout.write(`wbv2-context-cache-hit task=${task} inputHash=${inputHash}\n`);
  process.exit(0);
}
const result = spawnSync(process.execPath, [abs("tools/web/print-task-context.mjs"), "--task", task], { cwd: root, encoding: "utf8", maxBuffer: 8 * 1024 * 1024 });
const check = spawnSync(process.execPath, [abs("tools/web/check-task-context.mjs"), "--task", task], { cwd: root, encoding: "utf8", maxBuffer: 8 * 1024 * 1024 });
if ((result.status ?? 1) !== 0 || (check.status ?? 1) !== 0) {
  process.stderr.write(`${result.stdout ?? ""}${result.stderr ?? ""}${check.stdout ?? ""}${check.stderr ?? ""}`);
  process.exit(Math.max(result.status ?? 1, check.status ?? 1));
}
fs.mkdirSync(path.dirname(cachePath), { recursive: true });
const payload = { schemaVersion: 1, status: "PASS", task, inputHash, refreshedAt: new Date().toISOString() };
const temporary = `${cachePath}.tmp-${process.pid}`;
fs.writeFileSync(temporary, `${JSON.stringify(payload, null, 2)}\n`);
fs.renameSync(temporary, cachePath);
process.stdout.write(`wbv2-context-cache-refresh task=${task} inputHash=${inputHash}\n`);