import crypto from "node:crypto";
import fs from "node:fs";
import path from "node:path";
import { execFileSync } from "node:child_process";
import { expect, test } from "@playwright/test";
import { createDeploymentHttpServer, listenDeploymentHttpServer } from "../../../tools/web/deployment-http-server.mjs";

const root = path.resolve(import.meta.dirname, "../../..");
const fixture = "tests/files/web/basic_scene.blend";
const reader = "web/tests/fixtures/sculpt-remesh-main-snapshots.py";
const unit = "operator:OBJECT_OT_voxel_remesh";
const hash = (value: string | Buffer) => crypto.createHash("sha256").update(value).digest("hex");

test("native voxel remesh has desktop geometry, rollback, history and replay", async ({ page }, testInfo) => {
  test.setTimeout(180_000);
  const receipts = process.env.WBV2_RECEIPT_DIR ?? testInfo.outputPath("receipts");
  const directory = path.join(receipts, "remesh-artifacts");
  const jobs = testInfo.outputPath("jobs");
  fs.mkdirSync(directory, { recursive: true });
  fs.mkdirSync(jobs, { recursive: true });
  const native = path.resolve(root, process.env.BLENDER_BIN ?? "build_blender_native/bin/blender");
  const server = createDeploymentHttpServer({ root: path.join(root, "web/dist"), serverOperator: { blenderBinary: native, workspaceRoot: jobs } });
  const origin = await listenDeploymentHttpServer(server);
  const exchanges: { action?: string; status: number }[] = [];
  try {
    await page.route("**/api/server-operator-job*", async route => {
      const request = route.request();
      const url = new URL(request.url());
      const response = await route.fetch({ url: `${origin}${url.pathname}${url.search}`, timeout: 120_000 });
      exchanges.push({ action: request.headers()["x-server-operator-action"], status: response.status() });
      fs.writeFileSync(path.join(directory, `http-${exchanges.length}.json`), await response.body());
      await route.fulfill({ response });
    });
    await page.goto("/");
    const result = await page.evaluate(async bytes => {
      const { WebEngineClient } = await import("/src/engine-client/WebEngineClient.ts");
      const { default: catalog } = await import("/src/capabilities/blender-feature-route-catalog.json");
      const route = catalog.entries.find(entry => entry.id === "operator:OBJECT_OT_voxel_remesh");
      if (!route || route.route !== "SERVER_NATIVE") throw new Error("Voxel remesh route missing");
      const client = new WebEngineClient({ timeoutMs: 60_000 });
      const blends: Record<string, number[]> = {};
      const capture = async (stage: string, owner = client) => { blends[stage] = Array.from(new Uint8Array(await owner.saveBlend())); };
      try {
        const opened = await client.openBlend(Uint8Array.from(bytes).buffer);
        const active = opened.snapshot.nodes.find(node => node.id === opened.snapshot.activeObjectId);
        if (active?.type !== "MESH") throw new Error("Fixture requires active mesh");
        await client.applyCommand({ type: "setObjectSelection", objectId: active.id, selected: true, active: true });
        await capture("before");
        const applied = await client.invokeFeatureRoute({ route, properties: { voxel_size: 0.3 } });
        await capture("after");
        let rejection = "NO_ERROR";
        try { await client.invokeFeatureRoute({ route, properties: { voxel_size: -1 } }); }
        catch (error) { rejection = String((error as { message?: string }).message ?? error); }
        const negative = await client.snapshot();
        await capture("negative");
        await client.applyCommand({ type: "undo" });
        await capture("undo");
        await client.applyCommand({ type: "redo" });
        await capture("redo");
        const reopen = new WebEngineClient({ timeoutMs: 60_000 });
        try {
          await reopen.openBlend(Uint8Array.from(blends.redo).buffer);
          await capture("reopened", reopen);
        } finally { reopen.terminate(); }
        const repeat = new WebEngineClient({ timeoutMs: 60_000 });
        try {
          await repeat.openBlend(Uint8Array.from(bytes).buffer);
          await repeat.applyCommand({ type: "setObjectSelection", objectId: active.id, selected: true, active: true });
          await repeat.invokeFeatureRoute({ route, properties: { voxel_size: 0.3 } });
          await capture("second", repeat);
        } finally { repeat.terminate(); }
        return { blends, rejection, applied: applied.snapshot, negative: negative.snapshot };
      } catch (error) {
        const detail = error as { code?: string; message?: string };
        throw new Error(JSON.stringify({ code: detail.code, message: detail.message ?? String(error) }), { cause: error });
      } finally { client.terminate(); }
    }, Array.from(fs.readFileSync(path.join(root, fixture))));
    for (const [stage, bytes] of Object.entries(result.blends)) fs.writeFileSync(path.join(directory, `${stage}.blend`), Buffer.from(bytes));
    fs.writeFileSync(path.join(directory, "http.json"), JSON.stringify(exchanges, null, 2));
    fs.writeFileSync(path.join(directory, "browser.json"), JSON.stringify({ ...result, blends: undefined }, null, 2));
    expect(result.rejection).not.toBe("NO_ERROR");
    expect(result.negative).toEqual(result.applied);
    expect(exchanges.some(entry => entry.action === "submit" && entry.status === 202)).toBe(true);
    const log = fs.openSync(path.join(directory, "desktop.log"), "w");
    try {
      execFileSync(native, ["--background", "--factory-startup", "--python-exit-code", "1", "--python", path.join(root, reader), "--", directory], { timeout: 60_000, stdio: ["ignore", log, log] });
    } finally { fs.closeSync(log); }
    const states = JSON.parse(fs.readFileSync(path.join(directory, "native.json"), "utf8"));
    expect(states.after).not.toEqual(states.before);
    expect(states.after).toEqual(states.expected);
    expect(states.after.objects.find((obj: { name: string }) => obj.name === "BasicCube").vertices.length).toBeGreaterThan(8);
    for (const stage of ["negative", "redo", "reopened", "second"]) expect(states[stage]).toEqual(states.after);
    expect(states.undo).toEqual(states.before);
    const digest = (stage: string) => hash(JSON.stringify(states[stage]));
    const observations = {
      positive: { before: digest("before"), after: digest("after") },
      negative: { before: digest("after"), after: digest("negative") },
      undo_redo: { before: digest("before"), after: digest("after"), undo: digest("undo"), redo: digest("redo") },
      save_reopen: { saved: digest("redo"), reopened: digest("reopened") },
      determinism: { first: digest("after"), second: digest("second") },
    };
    const artifacts = [fixture, reader, "web/tests/e2e/sculpt-remesh-native.spec.ts", path.relative(root, native), "web/app/public/vendor/blender/web_engine.wasm", ...fs.readdirSync(directory).map(name => path.relative(root, path.join(directory, name)))].map(file => ({ path: file, sha256: hash(fs.readFileSync(path.join(root, file))) }));
    for (const [kind, values] of Object.entries(observations)) {
      const caseId = `sculpt-remesh-${kind}`;
      fs.writeFileSync(path.join(receipts, `${caseId}.json`), JSON.stringify({ status: "PASS", runtime: "CHROMIUM_WEBENGINE", caseId, kind, unitIds: [unit], observations: values, artifacts }, null, 2) + "\n");
    }
  } finally {
    server.closeAllConnections();
    await new Promise<void>((resolve, reject) => server.close(error => error ? reject(error) : resolve()));
  }
});