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-P11-002");
const fixturePath = path.join(root, "tests/files/web/generated/WBV2-P4-001-MODIFIER.DECLARED_SLICES.blend");
const fixture = fs.readFileSync(fixturePath);
const sourceSha256 = crypto.createHash("sha256").update(fixture).digest("hex");

test("WBV2-P11-002 applies a bounded Modifier parameter 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 summary = (snapshot: any, meshId: string) => {
      const mesh = snapshot.meshes.find((candidate: any) => candidate.id === meshId);
      if (!mesh) throw new Error(`mesh missing: ${meshId}`);
      return { id: mesh.id, vertexCount: mesh.vertexCount, edgeCount: mesh.edgeCount, faceCount: mesh.faceCount, triangleCount: mesh.triangleCount, modifierStack: mesh.modifierStack?.map((modifier: any) => ({ uuid: modifier.uuid, type: modifier.type, enabled: modifier.enabled, evaluationStatus: modifier.evaluationStatus })) ?? [] };
    };
    const errorShape = (error: any) => ({ code: error?.code, message: error?.message });
    const client = new WebEngineClient({ timeoutMs: 60_000 });
    const reopenedClient = new WebEngineClient({ timeoutMs: 60_000 });
    try {
      const opened = await client.openBlend(Uint8Array.from(input.bytes).buffer);
      const mesh: any = opened.snapshot.meshes.find((candidate: any) => candidate.id === "mesh:WBV2P4001ModifierMesh");
      const decimate: any = mesh?.modifierStack?.find((candidate: any) => candidate.type === "DECIMATE");
      if (!mesh || !decimate) throw new Error("modifier fixture missing DECIMATE stack entry");
      const before = summary(opened.snapshot, mesh.id);
      let disabled = { snapshot: opened } as any;
      for (const activeModifier of mesh.modifierStack?.filter((candidate: any) => candidate.enabled) ?? []) {
        disabled = await client.applyCommand({ type: "setModifierEnabled", meshId: mesh.id, modifierUuid: activeModifier.uuid, enabled: false, baseRevision: disabled.snapshot.revision } as any);
      }
      const profile = { schemaVersion: 1 as const, sourceMeshRevision: disabled.snapshot.revision, mode: "COLLAPSE" as const, ratio: 0.75, iterations: 1, attributePolicy: "PRESERVE" as const, triangulate: false, useSymmetry: false };
      const applied = await client.applyCommand({ type: "decimateMesh", meshId: mesh.id, profile } as any);
      const after = summary(applied.snapshot, mesh.id);
      const stale = await client.applyCommand({ type: "decimateMesh", meshId: mesh.id, profile } as any).then(() => ({ code: "NO_ERROR" })).catch(errorShape);
      const afterStale = summary((await client.snapshot()).snapshot, mesh.id);
      const malformed = await client.applyCommand({ type: "decimateMesh", meshId: mesh.id, profile: { ...profile, sourceMeshRevision: applied.snapshot.revision, ratio: 2 } } as any).then(() => ({ code: "NO_ERROR" })).catch(errorShape);
      const afterMalformed = summary((await client.snapshot()).snapshot, mesh.id);
      const saved = await client.saveBlend();
      const savedSha256 = await (async () => { const hash = await crypto.subtle.digest("SHA-256", saved.slice(0)); return Array.from(new Uint8Array(hash), (byte) => byte.toString(16).padStart(2, "0")).join(""); })();
      const reopened = await reopenedClient.openBlend(saved.slice(0));
      const reopenedSummary = summary(reopened.snapshot, mesh.id);
      return { sourceSha256: input.sourceSha256, meshId: mesh.id, modifierUuid: decimate.uuid, before, disabledRevision: disabled.snapshot.revision, appliedRevision: applied.snapshot.revision, simplify: applied.simplify, after, afterStale, afterMalformed, stale, malformed, savedSha256, reopened: reopenedSummary, exactSaveReopen: JSON.stringify(after) === JSON.stringify(reopenedSummary) && JSON.stringify(after) === JSON.stringify(afterStale) && JSON.stringify(after) === JSON.stringify(afterMalformed) };
    }
    finally { client.terminate(); reopenedClient.terminate(); }
  }, { bytes: Array.from(fixture), sourceSha256 });
  fs.mkdirSync(evidenceRoot, { recursive: true });
  const output = process.env.WBV2_MODIFIER_PARAMETER_REPORT ?? "modifier-parameter-production.json";
  fs.writeFileSync(path.join(evidenceRoot, output), `${JSON.stringify({ schemaVersion: 1, task: "WBV2-P11-002", operation: "MODIFIER_PARAMETER_APPLY_FAMILY_CHROMIUM", browser: "chromium", queueMutation: false, ...result }, null, 2)}\n`);
  expect(result.sourceSha256).toBe(sourceSha256);
  expect(result.disabledRevision).toBe(4);
  expect(result.appliedRevision).toBe(5);
  expect(result.simplify?.status).toBe("applied");
  expect(result.after.vertexCount).toBeLessThan(result.before.vertexCount);
  expect(result.after.triangleCount).toBeLessThan(result.before.triangleCount);
  expect(result.exactSaveReopen).toBe(true);
  expect(result.stale.code).not.toBe("NO_ERROR");
  expect(result.malformed.code).not.toBe("NO_ERROR");
  expect(result.afterStale).toEqual(result.after);
  expect(result.afterMalformed).toEqual(result.after);
  expect(result.savedSha256).not.toBe(sourceSha256);
});