binmat/doMoveDiscard.js

binmat simulator

import { shuffle } from "@samual/lib/shuffle"
import { StatusCode, Role, AttackerDiscardPile } from "./shared.js"
function doMoveDiscard(state, card, discardPile) {
	if (state.turn >= state.turns) return { status: StatusCode.MadeMoveOnFinishedGame }
	let cardDiscarded, cardsDrawn
	if ((state.turn % 2) + 1 == Role.Defender) {
		const index =
			2 == card.length ?
				state.defenderHand.indexOf(card)
			:	state.defenderHand.findIndex(([value]) => value == card)
		if (-1 == index) return { status: StatusCode.PlayedUnownedCard }
		if (discardPile == AttackerDiscardPile) return { status: StatusCode.DiscardedToOpponentDiscardPile }
		;(cardDiscarded = state.defenderHand.splice(index, 1)[0]),
			state.laneDiscardPiles[discardPile].push(cardDiscarded)
	} else {
		const index =
			2 == card.length ?
				state.attackerHand.indexOf(card)
			:	state.attackerHand.findIndex(([value]) => value == card)
		if (-1 == index) return { status: StatusCode.PlayedUnownedCard }
		if (discardPile != AttackerDiscardPile) return { status: StatusCode.DiscardedToOpponentDiscardPile }
		if (!state.attackerDiscardPile.length && !state.attackerDeck.length)
			return { status: StatusCode.AttackerDiscardedToEmptyDiscardAndDeck }
		if (
			((cardDiscarded = state.attackerHand.splice(index, 1)[0]),
			state.attackerDiscardPile.push(cardDiscarded),
			1 == state.attackerDeck.length)
		) {
			const firstCardDrawn = state.attackerDeck.pop()
			state.attackerHand.push(firstCardDrawn),
				state.attackerDeck.push(...shuffle(state.attackerDiscardPile.splice(0))),
				(cardsDrawn = [firstCardDrawn, state.attackerDeck.pop()]),
				state.attackerHand.push(cardsDrawn[1])
		} else
			state.attackerDeck.length || state.attackerDeck.push(...shuffle(state.attackerDiscardPile.splice(0))),
				(cardsDrawn = [state.attackerDeck.pop(), state.attackerDeck.pop()]),
				state.attackerHand.push(cardsDrawn[0], cardsDrawn[1])
	}
	return (
		state.turn++,
		state.turn == state.turns ?
			{ status: StatusCode.DefenderWin, cardDiscarded: cardDiscarded, cardsDrawn: cardsDrawn }
		:	{ status: StatusCode.Ok, cardDiscarded: cardDiscarded, cardsDrawn: cardsDrawn }
	)
}
export { doMoveDiscard }