#!/usr/bin/env node
import { spawn } from "node:child_process";
import { access, readFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";

const projectRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
const sourceFile = path.join(
  projectRoot,
  "dungeon-pipeline",
  "epoch-five-player-instances.json",
);

const exists = async (file) => {
  try {
    await access(file);
    return true;
  } catch {
    return false;
  }
};
const readJson = async (file) => JSON.parse(await readFile(file, "utf8"));
const slugPart = (value) => String(value ?? "")
  .normalize("NFKD")
  .replace(/[\u0300-\u036f]/g, "")
  .toLowerCase()
  .replace(/[^a-z0-9]+/g, "-")
  .replace(/^-|-$/g, "") || "unknown";

function run(script, argumentsList) {
  return new Promise((resolve, reject) => {
    const child = spawn(process.execPath, [script, ...argumentsList], {
      cwd: projectRoot,
      env: process.env,
      stdio: "inherit",
      windowsHide: true,
    });
    child.once("error", reject);
    child.once("exit", (code) => (
      code === 0
        ? resolve()
        : reject(new Error(`${path.basename(script)} ${argumentsList.join(" ")} exited ${code}.`))
    ));
  });
}

const source = await readJson(sourceFile);
const requested = new Set(process.argv.slice(2).filter((argument) => argument !== "--force"));
const force = process.argv.includes("--force");
const dungeons = source.dungeons.filter((dungeon) => (
  !requested.size || requested.has(dungeon.slug)
));
if (!dungeons.length) throw new Error("No requested Epoch dungeon slugs were found.");
if (!process.env[source.source.rootEnvironmentVariable] && !process.env.EPOCH_CLIENT_ROOT) {
  throw new Error(`${source.source.rootEnvironmentVariable} must point to the installed Epoch client.`);
}

const dungeonCli = path.join(projectRoot, "scripts", "dungeon-pipeline", "cli.mjs");
const scaffoldCli = path.join(
  projectRoot,
  "scripts",
  "manastorm-assets",
  "scaffold-converted-import.mjs",
);
const importCli = path.join(
  projectRoot,
  "scripts",
  "manastorm-assets",
  "import-existing-stage.mjs",
);
const manastormCli = path.join(
  projectRoot,
  "scripts",
  "manastorm-pipeline",
  "cli.mjs",
);
const reports = [];

for (const dungeon of dungeons) {
  const manastormSlug = `${dungeon.mapId}-${slugPart(dungeon.mapDirectory)}`;
  const shippingManifest = path.join(
    projectRoot,
    "public",
    "assets",
    "game",
    "manastorm",
    manastormSlug,
    "stage-pack.json",
  );
  if (!force && await exists(shippingManifest)) {
    reports.push({ slug: dungeon.slug, manastormSlug, status: "already-built" });
    continue;
  }
  try {
    const dungeonWork = path.join(projectRoot, "..", "HealerMan-Storage", "pipeline-work", "dungeons", dungeon.slug);
    const resumableStages = [
      {
        command: "extract",
        outputs: [path.join(dungeonWork, "source-export", "automation-result.json")],
      },
      {
        command: "convert",
        outputs: [path.join(dungeonWork, "staging", "environment", "conversion-report.json")],
      },
      {
        command: "optimize",
        outputs: [path.join(dungeonWork, "staging", "environment", "optimization-report.json")],
      },
      {
        command: "navmesh-conversion",
        outputs: [
          path.join(dungeonWork, "recast-report.json"),
          path.join(dungeonWork, "staging", `${dungeon.slug}-navigation.glb`),
        ],
      },
    ];
    for (const { command, outputs } of resumableStages) {
      if (!force && (await Promise.all(outputs.map(exists))).every(Boolean)) continue;
      await run(dungeonCli, [command, dungeon.slug]);
    }
    await run(scaffoldCli, [manastormSlug, dungeon.slug]);
    await run(importCli, [manastormSlug]);
    await run(manastormCli, ["optimize", manastormSlug]);
    await run(manastormCli, ["pack", manastormSlug]);
    reports.push({ slug: dungeon.slug, manastormSlug, status: "green" });
  } catch (error) {
    reports.push({
      slug: dungeon.slug,
      manastormSlug,
      status: "error",
      error: error instanceof Error ? error.message : String(error),
    });
  }
}

const failed = reports.filter((report) => report.status === "error");
console.log(JSON.stringify({
  status: failed.length ? "error" : "green",
  dungeons: reports.length,
  built: reports.filter((report) => report.status === "green").length,
  skipped: reports.filter((report) => report.status === "already-built").length,
  failed,
  reports,
}, null, 2));
if (failed.length) process.exitCode = 1;