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 fixture = fs.readFileSync(path.join(root, "tests/files/web/nonmesh_scene.blend"));
const fixtureSha256 = crypto.createHash("sha256").update(fixture).digest("hex");

test("WBV2-P1134-001 preserves Surface topology transactions through Main recovery and reopen", async ({ page }) => {
  test.setTimeout(120_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 summary = (snapshot: any, dataId: string) => {
      const surface = snapshot.nonMeshData?.find((entry: any) => entry.id === dataId);
      if (!surface) throw new Error(`surface missing: ${dataId}`);
      return {
        revision: snapshot.revision,
        geometryStatus: surface.geometryStatus,
        pointCount: surface.pointCount,
        splineTypes: surface.splineTypes ? [...surface.splineTypes] : null,
        splineDimensions: surface.splineDimensions ? surface.splineDimensions.map((item: any) => ({ ...item })) : null,
        cyclicU: surface.cyclicU ? [...surface.cyclicU] : null,
        cyclicV: surface.cyclicV ? [...surface.cyclicV] : null,
      };
    };
    try {
      const opened = await client.openBlend(Uint8Array.from(input.bytes).buffer);
      const surface = opened.snapshot.nonMeshData?.find((entry: any) => entry.type === "SURFACE" && entry.splineDimensions?.length);
      if (!surface) throw new Error("fixture has no Surface topology metadata");
      const dataId = surface.id as string;
      const before = summary(opened.snapshot, dataId);
      const dimensions = surface.splineDimensions.map((item: any) => ({ u: item.u, v: item.v, orderU: item.orderU, orderV: item.orderV }));
      const pointCount = dimensions.reduce((total: number, item: any) => total + item.u * item.v, 0);
      const controlPoints = Array.from({ length: pointCount * 3 }, (_, index) => (index % 3 === 0 ? index / 3 : 0));
      const pointWeights = new Array(pointCount).fill(1);
      const cyclicU = [...(surface.cyclicU ?? dimensions.map(() => false))];
      const cyclicV = [...(surface.cyclicV ?? dimensions.map(() => false))];
      cyclicU[0] = !cyclicU[0];
      const command = { type: "setSurfaceTopology", dataId, baseRevision: opened.snapshot.revision, splineDimensions: dimensions, controlPoints, pointWeights, cyclicU, cyclicV } as any;
      const edited = await client.applyCommand(command);
      const afterEdit = summary(edited.snapshot, dataId);
      const undo = await client.applyCommand({ type: "undo" } as any);
      const afterUndo = summary(undo.snapshot, dataId);
      const redo = await client.applyCommand({ type: "redo" } as any);
      const afterRedo = summary(redo.snapshot, dataId);
      const stale = await client.applyCommand({ ...command, baseRevision: redo.snapshot.revision - 1 }).then(() => ({ code: "NO_ERROR" })).catch((error: any) => ({ code: error?.code, message: error?.message }));
      const malformed = await client.applyCommand({ ...command, baseRevision: redo.snapshot.revision, splineDimensions: [{ ...dimensions[0], u: 1 }] }).then(() => ({ code: "NO_ERROR" })).catch((error: any) => ({ code: error?.code, message: error?.message }));
      const afterNegative = summary((await client.snapshot()).snapshot, dataId);
      const saved = await client.saveBlend();
      const reopened = await reopenedClient.openBlend(saved.slice(0));
      const afterReopen = summary(reopened.snapshot, dataId);
      return {
        fixtureSha256: input.fixtureSha256,
        dataId,
        before,
        afterEdit,
        afterUndo,
        afterRedo,
        stale,
        malformed,
        afterNegative,
        afterReopen,
        savedSha256: await crypto.subtle.digest("SHA-256", saved).then((bytes) => Array.from(new Uint8Array(bytes), (byte) => byte.toString(16).padStart(2, "0")).join("")),
      };
    }
    catch (error: any) {
      return { error: { code: error?.code, message: error?.message, detail: String(error) } } as any;
    }
    finally {
      client.terminate();
      reopenedClient.terminate();
    }
  }, { bytes: Array.from(fixture), fixtureSha256 });
  fs.mkdirSync(path.join(root, "tests/golden/WBV2-P1134-001"), { recursive: true });
  fs.writeFileSync(path.join(root, "tests/golden/WBV2-P1134-001/surface-topology-production.json"), `${JSON.stringify({ schemaVersion: 1, task: "WBV2-P1134-001", operation: "SURFACE_TOPOLOGY_MAIN_CHROMIUM", browser: "chromium", queueMutation: false, ...result }, null, 2)}\n`);
  expect(result.error).toBeUndefined();
  expect(result.fixtureSha256).toBe(fixtureSha256);
  expect(result.afterEdit.revision).toBe(result.before.revision + 1);
  expect(result.afterEdit.cyclicU).not.toEqual(result.before.cyclicU);
  expect(result.afterUndo.cyclicU).toEqual(result.before.cyclicU);
  expect(result.afterRedo.cyclicU).toEqual(result.afterEdit.cyclicU);
  expect(result.stale.code).not.toBe("NO_ERROR");
  expect(result.malformed.code).not.toBe("NO_ERROR");
  expect(result.afterNegative).toEqual(result.afterRedo);
  expect(result.afterReopen.cyclicU).toEqual(result.afterRedo.cyclicU);
  expect(result.afterReopen.cyclicV).toEqual(result.afterRedo.cyclicV);
  expect(result.afterReopen.splineDimensions).toEqual(result.afterRedo.splineDimensions);
  expect(result.afterReopen.revision).toBe(1);
  expect(result.savedSha256).not.toBe(fixtureSha256);
});