From cd2dc2854ec54026d093c05cb6241635bd1c0518 Mon Sep 17 00:00:00 2001
From: James Brumond <james@jbrumond.me>
Date: Fri, 18 Mar 2022 19:16:15 -0700
Subject: [PATCH] working on hand evaluation

---
 src/hand.ts  | 129 +++++++++++++++++++++++++++++++++++++++++++++++----
 src/index.ts |   1 +
 2 files changed, 121 insertions(+), 9 deletions(-)

diff --git a/src/hand.ts b/src/hand.ts
index c5e4921..cd8e85b 100644
--- a/src/hand.ts
+++ b/src/hand.ts
@@ -1,14 +1,125 @@
 
 import { Card } from './cards';
+import { Suit } from './suits';
+import { Rank, standard } from './ranks';
 
-export class Hand extends Array<Card> {
-	public sortBySuit() {
-		// this.sort((a, b) => {
-		// 	// 
-		// });
-	}
+export const pokerRanking = ranking([
+	standard.ace,
+	standard.two,
+	standard.three,
+	standard.four,
+	standard.five,
+	standard.six,
+	standard.seven,
+	standard.eight,
+	standard.nine,
+	standard.ten,
+	standard.jack,
+	standard.queen,
+	standard.king,
+	standard.ace,
+]);
 
-	public sortByRank() {
-		// 
-	}
+export interface EvaluateHandsOpts {
+	ranking?: Map<Rank, number[]>;
+	wrapRanking?: boolean;
+	// TODO: Wild-card evaluation
+	wildCards?: null;
+	minSizes?: {
+		sameRank?: number;
+		sameSuit?: number;
+		sameSuitRuns?: number;
+		runs?: number;
+	};
+}
+
+export interface EvaluateHandsResult {
+	highCard: Card;
+	sameRank: Card[][];
+	sameSuit: Card[][];
+	sameSuitRuns: Card[][];
+	runs: Card[][];
+}
+
+export function evaluatePossiblePokerHands(cards: Card[], wildCards?: null) {
+	return evaluatePossibleHands(cards, {
+		ranking: pokerRanking,
+		wrapRanking: false,
+		wildCards: wildCards,
+		minSizes: {
+			sameRank: 2,
+			sameSuit: 5,
+			sameSuitRuns: 5,
+			runs: 5
+		}
+	});
+}
+
+export function evaluatePossibleHands(cards: Card[], opts: EvaluateHandsOpts = { }) : EvaluateHandsResult {
+	const byRank: Map<Rank, Card[]> = new Map();
+	const bySuit: Map<Suit, Card[]> = new Map();
+
+	const minSizes = Object.assign({
+		sameRank: 2,
+		sameSuit: 5,
+		sameSuitRuns: 5,
+		runs: 5,
+	}, opts.minSizes || { });
+
+	const runs: Card[][] = findRuns(cards, minSizes.runs);
+	const sameRank: Card[][] = [ ];
+	const sameSuit: Card[][] = [ ];
+	const sameSuitRuns: Card[][] = [ ];
+
+	cards.forEach((card) => {
+		if (byRank.has(card.rank)) {
+			byRank.get(card.rank).push(card);
+		}
+
+		else {
+			const cards = [ card ];
+			byRank.set(card.rank, cards);
+			sameRank.push(cards);
+		}
+
+		if (bySuit.has(card.suit)) {
+			bySuit.get(card.suit).push(card);
+		}
+
+		else {
+			const cards = [ card ];
+			bySuit.set(card.suit, cards);
+			sameSuit.push(cards);
+		}
+	});
+
+	sameSuit.forEach((suitCards) => {
+		sameSuitRuns.push(...findRuns(suitCards, minSizes.sameSuitRuns));
+	});
+
+	return {
+		highCard: findHighCard(cards, opts.ranking),
+		sameRank: sameRank.filter((cards) => cards.length >= minSizes.sameRank),
+		sameSuit: sameSuit.filter((cards) => cards.length >= minSizes.sameSuit),
+		sameSuitRuns,
+		runs
+	};
+}
+
+function findHighCard(cards: Card[], ranking: Map<Rank, number[]>) : Card {
+	// 
+}
+
+function findRuns(cards: Card[], minLength: number) : Card[][] {
+	// 
+}
+
+function ranking(ranks: Rank[]) {
+	const rankingMap = new Map<Rank, number[]>();
+
+	// ranks.forEach((rank, index) => {
+	// 	rankingMap.set(rank, )
+	// })
+
+	return rankingMap;
 }
diff --git a/src/index.ts b/src/index.ts
index b3858ec..53aef32 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,6 +1,7 @@
 
 export * from './shuffle';
 export * from './cards';
+export * from './hand';
 export * as decks from './decks';
 export * as ranks from './ranks';
 export * as suits from './suits';