"use strict";

const path = require("path");
global.window = global;

const encoder = new TextEncoder();
const decoder = new TextDecoder();
global.TarinaiSaveCodec = {
  encodeBinarySnapshot(snapshot) {
    return encoder.encode(JSON.stringify(snapshot));
  },
  decodeBinarySnapshot(bytes) {
    return JSON.parse(decoder.decode(bytes));
  },
};
global.TarinaiSnapshot = {
  createSnapshot(world) {
    return { v: 1, a: "tj1", value: world.value, time: world.time };
  },
};
global.TarinaiRestoreCoordinator = {
  restoreSnapshot(snapshot, world) {
    world.value = snapshot.value;
    world.time = snapshot.time;
  },
};

require(path.join(__dirname, "..", "js", "history_system.js"));

const world = { value: 1, time: 10 };
if (!global.TarinaiHistory.capture(world, "first")) throw new Error("initial history capture failed");
if (!(world._undoStack[0].bytes instanceof Uint8Array)) throw new Error("history entry is not binary");
if ("snapshot" in world._undoStack[0] || "patch" in world._undoStack[0]) throw new Error("legacy object history payload remains");
if (global.TarinaiHistory.capture(world, "duplicate")) throw new Error("duplicate snapshot was not suppressed");

world.value = 2;
world.time = 20;
if (!global.TarinaiHistory.capture(world, "second")) throw new Error("second history capture failed");
world.value = 3;
world.time = 30;
let result = global.TarinaiHistory.undo(world);
if (!result.ok || world.value !== 2 || world.time !== 20) throw new Error("undo did not restore the binary snapshot");
result = global.TarinaiHistory.redo(world);
if (!result.ok || world.value !== 3 || world.time !== 30) throw new Error("redo did not restore the captured current state");

console.log("[OK] binary undo/redo history, duplicate suppression, and synchronous restore passed");