import { describe, expect, it } from "vitest";
import { existsSync, readFileSync } from "node:fs";
import { CrystalAssets } from "../src/game/rom/assets";
import { GameWorld } from "../src/game/world/world";
import {
  DecorationData,
  initialDecorations,
} from "../src/game/world/decorations";
import { EVENTS } from "../src/game/rom/profile";
import { settle } from "./world-driver";

const romPath =
  process.env.CRYSTAL_ROM_PATH ??
  "Pokemon - Crystal Version (UE) (V1.1) [C][!].gbc";
function fixture() {
  const assets = new CrystalAssets(new Uint8Array(readFileSync(romPath)));
  const world = new GameWorld(
    assets,
    () => new Date("2026-09-22T12:00:00"),
    () => 0,
  );
  return {
    assets,
    world,
    data: new DecorationData(assets.reader, assets.pokemon),
  };
}
function pc(world: GameWorld) {
  const save = world.save();
  world.restore({
    ...save,
    map: "24:7",
    x: 2,
    y: 2,
    direction: "up",
    objects: [],
  });
  world.interact();
  expect(world.notice, world.diagnostic).toBe("");
  expect(world.dialogue?.choice?.kind).toBe("menu");
}
function choose(world: GameWorld, name: string) {
  const choice = world.dialogue?.choice;
  if (choice?.kind !== "menu") throw new Error("Expected decoration menu");
  const index = choice.items.indexOf(name);
  expect(index, name).toBeGreaterThanOrEqual(0);
  world.choose(index);
}
function acknowledge(world: GameWorld) {
  for (let i = 0; world.dialogue && !world.dialogue.choice && i < 20; i++)
    world.advanceDialogue();
}

describe.skipIf(!existsSync(romPath))("room decorations", () => {
  it("starts with the original bed and Town Map and migrates old saves", () => {
    const { world, assets } = fixture();
    expect(world.state.decorations).toEqual(initialDecorations());
    expect(assets.block(world.map, 0, 4)).toBe(0x1b);
    expect(assets.block(world.map, 6, 0)).toBe(0x1f);
    expect(world.state.events.has(EVENTS.playersRoomPoster)).toBe(true);
    const old = world.save() as Partial<ReturnType<GameWorld["save"]>>;
    delete old.decorations;
    world.restore(old);
    expect(world.state.decorations).toEqual(initialDecorations());
  });

  it("PC puts away and restores a bed; mid-menu saves retain committed choices", () => {
    const { world, assets } = fixture();
    pc(world);
    choose(world, "BED");
    choose(world, "PUT IT AWAY");
    expect(world.liveState.decorations.bed).toBe(0);
    expect(world.save().decorations.bed).toBe(2);
    acknowledge(world);
    choose(world, "EXIT");
    settle(world);
    expect(world.state.decorations.bed).toBe(0);
    expect(assets.block(world.map, 0, 4)).toBe(
      assets.block(assets.map("24:7"), 0, 4),
    );
    world.restore(world.save());
    pc(world);
    choose(world, "BED");
    choose(world, "FEATHERY BED");
    acknowledge(world);
    choose(world, "EXIT");
    settle(world);
    expect(assets.block(world.map, 0, 4)).toBe(0x1b);
  });

  it("owned ornaments move between sides without duplication and reload as sprites", () => {
    const { world, data } = fixture();
    world.state.events.add(data.attribute(30).event);
    pc(world);
    choose(world, "ORNAMENT");
    choose(world, "PIKACHU DOLL");
    choose(world, "RIGHT SIDE");
    acknowledge(world);
    choose(world, "ORNAMENT");
    choose(world, "PIKACHU DOLL");
    choose(world, "LEFT SIDE");
    acknowledge(world);
    choose(world, "EXIT");
    settle(world);
    expect([
      world.state.decorations.left,
      world.state.decorations.right,
    ]).toEqual([30, 0]);
    expect(world.objects().some((object) => object.id === 3)).toBe(true);
    expect(world.objects().some((object) => object.id === 4)).toBe(false);
    world.restore(world.save());
    expect(world.state.variables[1]).toBe(data.attribute(30).sprite);
  });

  it("validates ownership and categories before changing the current game", () => {
    const { world } = fixture();
    const before = world.save();
    for (const decorations of [
      null,
      { ...before.decorations, bed: 30 },
      { ...before.decorations, bed: 3 },
      { ...before.decorations, poster: 999 },
    ]) {
      expect(() => world.restore({ ...before, decorations })).toThrow(
        /Invalid native save/,
      );
      expect(world.save()).toEqual(before);
    }
  });

  it("sets every tile category and sprite category from the owned ROM attributes", () => {
    const { world, assets, data } = fixture();
    for (let id = 1; id <= 52; id++) {
      const a = data.attribute(id);
      if (a.action & 1) world.state.events.add(a.event);
    }
    world.state.decorations = {
      bed: 5,
      carpet: 10,
      plant: 14,
      poster: 19,
      console: 24,
      bigDoll: 28,
      left: 51,
      right: 52,
    };
    world.warpTo("24:7", 2, 2);
    expect(
      [
        [0, 4],
        [7, 4],
        [6, 0],
        [0, 0],
        [0, 2],
        [2, 2],
        [4, 2],
      ].map(([x, y]) => assets.block(world.map, x, y)),
    ).toEqual([0x1e, 0x22, 0x25, 0x11, 0x12, 0x13, 0x12]);
    expect([0, 1, 2, 3].map((i) => world.state.variables[i])).toEqual(
      [24, 51, 52, 28].map((id) => data.attribute(id).sprite),
    );
    expect(world.objects()).toHaveLength(4);
    world.restore(world.save());
    expect(world.objects()).toHaveLength(4);
  });
});