import { describe, expect, it } from "vitest";
import { existsSync, mkdirSync, readFileSync, writeFileSync } from "node:fs";
import { CrystalAssets } from "../src/game/rom/assets";
import { GameWorld } from "../src/game/world/world";
import { generatePartyMon } from "../src/game/party/pokemon";
import { CRYSTAL_ROM } from "../src/rom/validate";
import { encodeSave } from "../src/storage/saves";
import { foundationFixture } from "./foundation-fixture";

// Backups for the manual checks on the project board's "A tester" column,
// built from the local ROM and imported through Savegames → Import native
// backup. They hold names read from the ROM, so they stay out of the
// repository (*.crystal-save.json is ignored).
//
//   MAKE_TEST_SAVES=1 npx vitest run tests/human-test-saves.test.ts
const romPath =
  process.env.CRYSTAL_ROM_PATH ??
  "Pokemon - Crystal Version (UE) (V1.1) [C][!].gbc";
const OUT = "test-saves";
/** NativeRuntime.id, which an imported backup must name. */
const CORE_ID = "crystal-native-world-v1";

describe.skipIf(!existsSync(romPath) || !process.env.MAKE_TEST_SAVES)(
  "saves for manual testing",
  () => {
    const assets = () =>
      new CrystalAssets(new Uint8Array(readFileSync(romPath)));
    function write(name: string, world: GameWorld) {
      const state = new TextEncoder().encode(JSON.stringify(world.save()));
      // The backup must load as the app would load it.
      new GameWorld(assets()).restore(JSON.parse(new TextDecoder().decode(state)));
      mkdirSync(OUT, { recursive: true });
      writeFileSync(
        `${OUT}/${name}.crystal-save.json`,
        encodeSave({
          version: 1,
          romHash: CRYSTAL_ROM.sha1,
          coreId: CORE_ID,
          savedAt: new Date().toISOString(),
          state,
        }),
      );
    }

    it("writes fly-teleport: New Bark Town with Fly, Teleport and Escape Ropes", () => {
      const a = assets();
      // Pidgeot with Fly, the Storm Badge, New Bark and Cherrygrove visited.
      const world = foundationFixture(a, "fly");
      const abra = generatePartyMon(a.pokemon, {
        species: 63, // ABRA
        level: 20,
        item: 0,
        otId: world.playerId,
        ot: "CHRIS",
        dvs: 0x9abc,
        caughtData: 0,
      });
      abra.moves = [0x64, 0, 0, 0]; // TELEPORT
      abra.pp = [20, 0, 0, 0];
      world.state.party.push(abra);
      // Violet City too, whose map is not ported yet.
      world.state.flags.add(a.spawnEngineFlag(16)!);
      world.state.lastSpawnMap = "26:3"; // Cherrygrove City
      world.state.bag.items = [{ item: 0x13, quantity: 3 }]; // ESCAPE ROPE
      expect(world.mapId).toBe("24:4");
      write("fly-teleport", world);
    });

    it("writes headbutt: Route 29 facing a Headbutt tree", () => {
      // Totodile with Headbutt and Tackle, below the first reachable tree.
      const world = foundationFixture(assets(), "headbutt");
      expect(world.mapId).toBe("24:3");
      write("headbutt", world);
    });
  },
);