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 task = process.env.WBV2_BATCH_TASK ?? "WBV2-P1147-001";
const fixtureName = process.env.WBV2_BATCH_FIXTURE ?? "tests/files/web/modifier_reader_batch_two_scene.blend";
const fixturePath = path.join(root, fixtureName);
const fixture = fs.readFileSync(fixturePath);
const fixtureSha256 = crypto.createHash("sha256").update(fixture).digest("hex");
const expectedTypes = JSON.parse(process.env.WBV2_BATCH_TYPES ?? '["LAPLACIANDEFORM","LAPLACIANSMOOTH","MASK","SHRINKWRAP"]');
const sourceUnits = JSON.parse(process.env.WBV2_BATCH_UNITS ?? '["modifier-source:MOD_laplaciandeform","modifier-source:MOD_laplaciansmooth","modifier-source:MOD_mask","modifier-source:MOD_shrinkwrap","rna-struct:LaplacianDeformModifier","rna-struct:LaplacianSmoothModifier","rna-struct:MaskModifier","rna-struct:ShrinkwrapModifier"]');

test("second modifier reader batch preserves concrete Blender Main metadata", async ({ page }) => {
  test.setTimeout(180_000);
  await page.goto("/");
  const result = await page.evaluate(async (bytes) => {
    const { WebEngineClient } = await import("/src/engine-client/WebEngineClient.ts");
    const canonical = (snapshot: any) => [...(snapshot.meshes ?? []), ...(snapshot.nodes ?? [])].flatMap((mesh: any) =>
      (mesh.modifierStack ?? []).map((modifier: any) => ({
        meshId: mesh.id,
        uuid: modifier.uuid,
        name: modifier.name,
        type: modifier.type,
        enabled: modifier.enabled,
        evaluationStatus: modifier.evaluationStatus,
        parameters: modifier.parameters ?? null,
      })));
    const client = new WebEngineClient({ timeoutMs: 60_000 });
    const reopenedClient = new WebEngineClient({ timeoutMs: 60_000 });
    const secondClient = new WebEngineClient({ timeoutMs: 60_000 });
    const output: any = {};
    try {
      const opened = await client.openBlend(Uint8Array.from(bytes).buffer);
      output.before = canonical(opened.snapshot);
      output.types = output.before.map((modifier: any) => modifier.type);
      const saved = await client.saveBlend();
      output.after = canonical((await reopenedClient.openBlend(saved.slice(0))).snapshot);
      output.second = canonical((await secondClient.openBlend(Uint8Array.from(bytes).buffer)).snapshot);
      output.saveReopenExact = JSON.stringify(output.before) === JSON.stringify(output.after);
      output.deterministicExact = JSON.stringify(output.before) === JSON.stringify(output.second);
      output.savedSha256 = await crypto.subtle.digest("SHA-256", saved).then((hash) =>
        Array.from(new Uint8Array(hash), (byte) => byte.toString(16).padStart(2, "0")).join(""));
      try {
        await client.openBlend(Uint8Array.from([0x42, 0x4c, 0x45, 0x4e, 0x44]).buffer);
        output.malformed = { code: "ACCEPTED_MALFORMED" };
      } catch (error: any) {
        output.malformed = { code: error?.code, message: error?.message };
      }
    } catch (error: any) {
      output.error = { code: error?.code, message: error?.message, detail: String(error) };
    } finally {
      client.terminate();
      reopenedClient.terminate();
      secondClient.terminate();
    }
    return output;
  }, Array.from(fixture));

  const report = {
    schemaVersion: 1,
    task,
    operation: "MODIFIER_READER_BATCH_TWO_CHROMIUM_SAVE_REOPEN",
    browser: "chromium",
    queueMutation: false,
    fixture: fixtureName,
    fixtureSha256,
    expectedTypes,
    sourceUnits,
    ...result,
  };
  fs.mkdirSync(path.join(root, `tests/golden/${task}`), { recursive: true });
  fs.writeFileSync(path.join(root, `tests/golden/${task}/modifier-reader-batch-production.json`), `${JSON.stringify(report, null, 2)}\n`);

  expect(result.error).toBeUndefined();
  expect(result.types).toEqual(expect.arrayContaining(expectedTypes));
  expect(result.saveReopenExact).toBe(true);
  expect(result.deterministicExact).toBe(true);
  expect(result.malformed?.code).not.toBe("ACCEPTED_MALFORMED");
});