import { describe, expect, it } from "vitest";
import {
  advanceState,
  applyAction,
  createTableState,
  type PokerTableState,
} from "@/lib/minigames/poker";
import type { Card } from "@/lib/minigames/poker";
import {
  adjustStack,
  createTable,
  getSnapshotFor,
  joinTable,
  setBoardQueue,
  setHoleQueue,
  startGame,
} from "@/lib/minigames/poker/tables";

function card(rank: Card["rank"], suit: Card["suit"]): Card {
  return { rank, suit };
}

function withQueues(
  state: PokerTableState,
  queues: Partial<Pick<PokerTableState, "queuedBoard" | "queuedHoles">>,
): PokerTableState {
  return { ...state, ...queues };
}

/** Apply an action and unwrap the result; throws on illegal actions. */
function act(
  state: PokerTableState,
  seatId: number,
  action: Parameters<typeof applyAction>[2],
  amount?: number,
): PokerTableState {
  const result = applyAction(state, seatId, action, amount);
  if (!result.success) throw new Error(result.error);
  return result.state;
}

describe("dev board queue", () => {
  it("deals the queued flop and turn cards in order before falling back to the deck", () => {
    let state = createTableState([{ name: "A" }, { name: "B" }], {}, () => 0.5);
    const queued = [card(14, "s"), card(13, "s"), card(12, "s"), card(11, "s"), card(10, "s")];
    state = withQueues(state, { queuedBoard: queued });

    // Preflop: the small blind calls to the big blind, the big blind checks,
    // which completes the round and deals the flop from the queue.
    state = act(state, 0, "call", undefined);
    state = act(state, 1, "check", undefined);

    expect(state.communityCards).toEqual([card(14, "s"), card(13, "s"), card(12, "s")]);
    expect(state.queuedBoard).toEqual([card(11, "s"), card(10, "s")]);

    // Flop: both check, dealing the turn from the queue.
    state = act(state, 1, "check", undefined);
    state = act(state, 0, "check", undefined);

    expect(state.communityCards[3]).toEqual(card(11, "s"));
    expect(state.queuedBoard).toEqual([card(10, "s")]);
  });

  it("consumes queued cards inside runOutAndShowdown when betting is impossible", () => {
    let state = createTableState(
      [
        { name: "A", stack: 50 },
        { name: "B", stack: 50 },
      ],
      {},
      () => 0.5,
    );
    state = withQueues(state, {
      queuedBoard: [card(5, "h"), card(6, "h"), card(7, "h"), card(8, "h"), card(9, "h")],
    });

    // Two quick all-ins leave nobody able to act: the board runs out.
    state = act(state, 0, "raise", 50);
    state = act(state, 1, "call", undefined);

    expect(state.communityCards).toEqual([
      card(5, "h"),
      card(6, "h"),
      card(7, "h"),
      card(8, "h"),
      card(9, "h"),
    ]);
    expect(state.queuedBoard).toEqual([]);
  });
});

describe("dev hole queues", () => {
  it("replaces the next hand's hole cards for queued seats only", () => {
    let state = createTableState([{ name: "A" }, { name: "B" }, { name: "C" }], {}, () => 0.5);
    // Queue while hand 1 is live, then fold it out so hand 2 deals fresh.
    state = withQueues(state, {
      queuedHoles: {
        0: [card(14, "s"), card(14, "h")],
        1: [card(2, "c"), card(3, "c")],
      },
    });
    state = act(state, 0, "fold", undefined);
    state = act(state, 1, "fold", undefined);
    const dealt = advanceState(state);

    expect(dealt.players[0].holeCards).toEqual([card(14, "s"), card(14, "h")]);
    expect(dealt.players[1].holeCards).toEqual([card(2, "c"), card(3, "c")]);
    expect(dealt.players[2].holeCards.length).toBe(2);
    expect(dealt.queuedHoles).toEqual({});
  });
});

describe("dev stack adjustment", () => {
  it("adds and subtracts chips, clamped at zero", () => {
    const tableId = createTable(9601, "Host");
    joinTable(tableId, 9602, "Guest");
    startGame(tableId, 9601);

    let snapshot = getSnapshotFor(tableId, 9601);
    const hostSeat = snapshot.you?.viewerSeat ?? 0;
    const before = snapshot.you?.players.find((p) => p.seatId === hostSeat)?.stack ?? 0;

    adjustStack(tableId, 9601, hostSeat, 250);
    snapshot = getSnapshotFor(tableId, 9601);
    expect(snapshot.you?.players.find((p) => p.seatId === hostSeat)?.stack).toBe(before + 250);

    adjustStack(tableId, 9601, hostSeat, -(before + 250) - 500);
    snapshot = getSnapshotFor(tableId, 9601);
    expect(snapshot.you?.players.find((p) => p.seatId === hostSeat)?.stack).toBe(0);
  });

  it("rejects invalid seats and oversized queues", () => {
    const tableId = createTable(9611, "Host");
    joinTable(tableId, 9612, "Guest");
    startGame(tableId, 9611);

    expect(() =>
      setBoardQueue(tableId, 9611, [
        card(2, "s"),
        card(3, "s"),
        card(4, "s"),
        card(5, "s"),
        card(6, "s"),
        card(7, "s"),
      ]),
    ).toThrow();
    expect(() => setHoleQueue(tableId, 9611, 9, [card(2, "s"), card(3, "s")])).toThrow();
    expect(() => adjustStack(tableId, 9611, 9, 100)).toThrow();
  });
});