import { content } from "@deadhead/content";
import { boardPeriodMs } from "@deadhead/sim";
import { describe, expect, it } from "vitest";
import { encodeSave } from "../src/index";
import {
  addPilot,
  addShip,
  readSave,
  setCredits,
  signUpOwner,
  TEST_NOW,
  useTestApp,
} from "./support";

const testApp = useTestApp();
const COURIER_HOLD = content.shipModel("courier")!.cargoCapacityTonnes;
const PERIOD = boardPeriodMs(content.config);

describe("completable boards in the engine (Step 19.3, decisions 0.5.114–0.5.117)", () => {
  it("hides a heavy job once the only ship that could take it has left", async () => {
    const { app, clock } = testApp();
    await signUpOwner(app);
    await addShip(app, { id: "f1", modelId: "freighter", name: "Big Wren" });
    await addPilot(app, { id: "p1", name: "Ada", assignedShipId: "f1" });

    const before = (await app.call("getContractBoard", { locationId: "earth" })).contracts;
    const heavy = before.filter((c) => c.massTonnes > COURIER_HOLD);
    expect(heavy.length).toBeGreaterThan(0);

    // The Freighter flies empty to the Moon; the Courier is still at Earth.
    await app.call("createDispatch", {
      kind: "reposition",
      shipId: "f1",
      pilotId: "p1",
      destinationId: "moon",
    });
    clock.now += 1_000;
    const after = (await app.call("getContractBoard", { locationId: "earth" })).contracts;
    expect(after.filter((c) => c.massTonnes > COURIER_HOLD)).toEqual([]);
    // What the Courier can take is still there, unchanged.
    expect(after).toEqual(before.filter((c) => c.massTonnes <= COURIER_HOLD));
  });

  it("adds a bigger ship's jobs at the next board period, not mid-period", async () => {
    const { app, clock } = testApp();
    const owner = await signUpOwner(app);
    const first = (await app.call("getContractBoard", { locationId: "earth" })).contracts;
    expect(first.every((c) => c.massTonnes <= COURIER_HOLD)).toBe(true);

    await setCredits(app, content.shipModel("freighter")!.price);
    const { ship } = await app.call("buyShip", { modelId: "freighter", bayId: owner.earthBayId });
    await addPilot(app, { id: "p1", name: "Ada", assignedShipId: ship.id });
    clock.now += 1_000;
    expect((await app.call("getContractBoard", { locationId: "earth" })).contracts).toEqual(first);

    // Next period: the board is made for the Courier and the Freighter.
    clock.now = (Math.floor(TEST_NOW / PERIOD) + 1) * PERIOD + 1_000;
    let heavy = 0;
    for (let period = 0; period < 5; period++, clock.now += PERIOD) {
      const board = (await app.call("getContractBoard", { locationId: "earth" })).contracts;
      heavy += board.filter((c) => c.massTonnes > COURIER_HOLD).length;
    }
    expect(heavy).toBeGreaterThan(0);
  });

  it("stores the qualifying fleet with each board it generates", async () => {
    const { app } = testApp();
    await signUpOwner(app);
    await app.call("getContractBoard", { locationId: "earth" });
    const [board] = (await readSave(app)).contractBoards.filter((b) => b.kind === "location");
    expect(board!.fleet).toEqual([
      {
        modelId: "courier",
        skills: {},
        upgrades: {},
        fuelFu: content.shipModel("courier")!.tankCapacityFu,
      },
    ]);
  });

  it("opens an older save with no stored boards, and regenerates them on view", async () => {
    const { app } = testApp();
    await signUpOwner(app);
    const before = (await app.call("getContractBoard", { locationId: "earth" })).contracts;
    const old = await readSave(app);
    expect(old.contractBoards.length).toBeGreaterThan(0);
    // As version 3 wrote it: boards without a fleet snapshot.
    const v3 = {
      ...old,
      saveVersion: 3,
      contractBoards: old.contractBoards.map(({ fleet: _fleet, ...rest }) => rest),
    };

    const device = testApp().app;
    await device.call("importSave", { code: await encodeSave(v3 as never) });
    expect((await readSave(device)).contractBoards).toEqual([]);
    // The same inputs regenerate the same board.
    expect((await device.call("getContractBoard", { locationId: "earth" })).contracts).toEqual(
      before,
    );
    expect((await readSave(device)).contractBoards).toHaveLength(1);
  });
});