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 fixturePath = process.env.WBV2_BATCH_FIXTURE ?? "tests/files/web/basic_scene.blend";
const fixture = fs.readFileSync(path.join(root, fixturePath));
const fixtureSha256 = crypto.createHash("sha256").update(fixture).digest("hex");
const task = process.env.WBV2_BATCH_TASK ?? "WBV2-P22-002";
const productionPath = process.env.WBV2_BATCH_PRODUCTION ?? `tests/golden/${task}/object-delete-production.json`;
const sourceUnits = JSON.parse(process.env.WBV2_BATCH_UNITS ?? "[\"operator:OBJECT_OT_delete\"]") as string[];

test("native object delete batch preserves Main recovery semantics", async ({ page }) => {
  await page.goto("/");
  const result = await page.evaluate(async (bytes) => {
    const { WebEngineClient } = await import("/src/engine-client/WebEngineClient.ts");
    const client = new WebEngineClient({ timeoutMs: 60_000 });
    const reopened = new WebEngineClient({ timeoutMs: 60_000 });
    const shape = (error: any) => ({ code: error?.code, message: error?.message });
    try {
      const opened = await client.openBlend(Uint8Array.from(bytes).buffer);
      const object = opened.snapshot.nodes.find((node) => node.type === "MESH");
      if (!object) throw new Error("basic scene has no mesh object");
      const deleted = await client.applyCommand({ type: "deleteObject", objectId: object.id } as any);
      const undo = await client.applyCommand({ type: "undo" });
      const redo = await client.applyCommand({ type: "redo" });
      const malformed = await client.applyCommand({ type: "deleteObject", objectId: "object:missing" } as any).then(() => ({ code: "NO_ERROR" })).catch(shape);
      const afterMalformed = await client.snapshot();
      const saved = await client.saveBlend();
      const restored = await reopened.openBlend(saved.slice(0));
      return {
        browser: "chromium",
        baseRevision: opened.snapshot.revision,
        deleteRevision: deleted.snapshot.revision,
        undoRevision: undo.snapshot.revision,
        redoRevision: redo.snapshot.revision,
        beforeCount: opened.snapshot.nodes.length,
        afterCount: deleted.snapshot.nodes.length,
        malformed,
        malformedRevisionPreserved: afterMalformed.snapshot.revision === redo.snapshot.revision,
        reopenedCount: restored.snapshot.nodes.length,
        reopenedDeleted: !restored.snapshot.nodes.some((node) => node.id === object.id),
        reopenedRevision: restored.snapshot.revision,
      };
    } finally {
      client.terminate();
      reopened.terminate();
    }
  }, Array.from(fixture));
  fs.mkdirSync(path.dirname(path.join(root, productionPath)), { recursive: true });
  fs.writeFileSync(path.join(root, productionPath), `${JSON.stringify({ schemaVersion: 1, task, operation: "OBJECT_DELETE_ENGINE_CHROMIUM", browser: "chromium", queueMutation: false, fixture: fixturePath, fixtureSha256, sourceUnits, ...result }, null, 2)}\n`);
  expect(result.browser).toBe("chromium");
  expect(result.afterCount).toBe(result.beforeCount - 1);
  expect(result.deleteRevision).toBe(result.baseRevision + 1);
  expect(result.undoRevision).toBe(result.baseRevision + 2);
  expect(result.redoRevision).toBe(result.baseRevision + 3);
  expect(result.malformed.code).not.toBe("NO_ERROR");
  expect(result.malformedRevisionPreserved).toBe(true);
  expect(result.reopenedDeleted).toBe(true);
  expect(result.reopenedRevision).toBe(1);
});