import crypto from "node:crypto";
import fs from "node:fs";
import path from "node:path";
import { expect, test } from "@playwright/test";

const root = path.resolve(import.meta.dirname, "../../..");
const evidenceRoot = path.join(root, "tests/golden/WBV2-P12-002");
const fixture = fs.readFileSync(path.join(root, "tests/files/web/generated/WBV2-P2-002-OBJECT.TRANSFORM_HIERARCHY.blend"));
const sourceSha256 = crypto.createHash("sha256").update(fixture).digest("hex");

test("WBV2-P12-002 executes visibility and transform transactions through compiled WASM Main", async ({ page }) => {
  test.setTimeout(180_000);
  await page.goto("/");
  const result = await page.evaluate(async (input) => {
    const { WebEngineClient } = await import("/src/engine-client/WebEngineClient.ts");
    const client = new WebEngineClient({ timeoutMs: 60_000 });
    const reopenedClient = new WebEngineClient({ timeoutMs: 60_000 });
    const shape = (error: any) => ({ code: error?.code, message: error?.message });
    const objectState = (snapshot: any, id: string) => {
      const object = snapshot.nodes.find((candidate: any) => candidate.id === id);
      if (!object) throw new Error(`object missing: ${id}`);
      return { id: object.id, visible: object.visible, parentId: object.parentId, translation: object.transform?.translation ?? object.translation, worldMatrix: object.worldMatrix };
    };
    const digest = async (value: ArrayBuffer): Promise<string> => { const hash = await crypto.subtle.digest("SHA-256", value); return Array.from(new Uint8Array(hash), (byte) => byte.toString(16).padStart(2, "0")).join(""); };
    try {
      const opened = await client.openBlend(Uint8Array.from(input.bytes).buffer);
      const parentId = "object:WBV2P2002Parent";
      const childId = "object:WBV2P2002Child";
      const beforeParent = objectState(opened.snapshot, parentId);
      const beforeChild = objectState(opened.snapshot, childId);
      const hidden = await client.applyCommand({ type: "setObjectVisibility", objectId: parentId, visible: false, baseRevision: opened.snapshot.revision } as any);
      const transformed = await client.applyCommand({ type: "setObjectTransform", objectId: childId, translation: [0.5, 2.5, 0], rotationEuler: [0, 0, 0], scale: [1, 1, 1], baseRevision: hidden.snapshot.revision } as any);
      const afterParent = objectState(transformed.snapshot, parentId);
      const afterChild = objectState(transformed.snapshot, childId);
      const stale = await client.applyCommand({ type: "setObjectVisibility", objectId: parentId, visible: true, baseRevision: opened.snapshot.revision } as any).then(() => ({ code: "NO_ERROR" })).catch(shape);
      const malformed = await client.applyCommand({ type: "setObjectTransform", objectId: childId, translation: [0.5, 2.5], rotationEuler: [0, 0, 0], scale: [1, 1, 1], baseRevision: transformed.snapshot.revision } as any).then(() => ({ code: "NO_ERROR" })).catch(shape);
      const unchanged = (await client.snapshot()).snapshot;
      const saved = await client.saveBlend();
      const savedSha256 = await digest(saved.slice(0));
      const reopened = await reopenedClient.openBlend(saved.slice(0));
      const reopenedParent = objectState(reopened.snapshot, parentId);
      const reopenedChild = objectState(reopened.snapshot, childId);
      return { baseRevision: opened.snapshot.revision, hiddenRevision: hidden.snapshot.revision, transformedRevision: transformed.snapshot.revision, beforeParent, beforeChild, afterParent, afterChild, stale, malformed, unchangedParent: objectState(unchanged, parentId), unchangedChild: objectState(unchanged, childId), reopenedParent, reopenedChild, savedSha256, sourceSha256: await digest(Uint8Array.from(input.bytes).buffer), exactSaveReopen: JSON.stringify({ parent: afterParent, child: afterChild }) === JSON.stringify({ parent: reopenedParent, child: reopenedChild }) };
    }
    finally { client.terminate(); reopenedClient.terminate(); }
  }, { bytes: Array.from(fixture) });
  fs.mkdirSync(evidenceRoot, { recursive: true });
  const output = process.env.WBV2_SCENE_OBJECT_REPORT ?? "scene-object-production.json";
  fs.writeFileSync(path.join(evidenceRoot, output), `${JSON.stringify({ schemaVersion: 1, task: "WBV2-P12-002", operation: "SCENE_OBJECT_WORKFLOW_ENGINE_CHROMIUM", browser: "chromium", queueMutation: false, ...result }, null, 2)}\n`);
  expect(result.sourceSha256).toBe(sourceSha256);
  expect(result.hiddenRevision).toBe(result.baseRevision + 1);
  expect(result.transformedRevision).toBe(result.baseRevision + 2);
  expect(result.afterParent.visible).toBe(false);
  expect(result.afterChild.translation).toEqual([0.5, 2.5, 0]);
  expect(result.exactSaveReopen).toBe(true);
  expect(result.stale.code).not.toBe("NO_ERROR");
  expect(result.stale.message).toContain("REVISION_CONFLICT");
  expect(result.malformed.code).not.toBe("NO_ERROR");
  expect(result.unchangedParent).toEqual(result.afterParent);
  expect(result.unchangedChild).toEqual(result.afterChild);
  expect(result.savedSha256).not.toBe(sourceSha256);
});