1 files changed, 56 insertions, 0 deletions
diff --git a/poker/api.py b/poker/api.py
new file mode 100644
index 0000000..9faa89b
--- /dev/null
+++ b/poker/api.py
@@ -0,0 +1,56 @@
+from fastapi import Body, FastAPI
+from loguru import logger
+
+from poker.constants import Suit, Value
+from poker.models import Card, Hand
+from poker.rank import rank_hand
+
+app = FastAPI()
+
+_CARD_PATTERN = r"\s".join(5 * ["(2|3|4|5|6|7|8|9|10|J|K|Q|A)[CDHS]"])
+_SUIT_MAP = {
+    "C": Suit.CLUBS,
+    "D": Suit.DIAMONDS,
+    "H": Suit.HEARTS,
+    "S": Suit.SPADES,
+}
+_VALUE_MAP = {
+    "2": Value.TWO,
+    "3": Value.THREE,
+    "4": Value.FOUR,
+    "5": Value.FIVE,
+    "6": Value.SIX,
+    "7": Value.SEVEN,
+    "8": Value.EIGHT,
+    "9": Value.NINE,
+    "10": Value.TEN,
+    "J": Value.JACK,
+    "Q": Value.QUEEN,
+    "K": Value.KING,
+    "A": Value.ACE,
+}
+
+
+@app.get("/")
+async def health_check() -> str:
+    """Health check endpoint."""
+    return "OK"
+
+
+@app.post("/rank")
+def rank(body: str = Body(regex=_CARD_PATTERN, example="2H 3D 5S 10C KD")) -> str:
+    """Rank hand.
+
+    TODO: Improve error response.
+    """
+    logger.info(f"Input hand: {body}")
+    cards = [
+        Card(suit=_SUIT_MAP[card[-1]], value=_VALUE_MAP[card[:-1]])
+        for card in body.split()
+    ]
+
+    ranked_hand = rank_hand(Hand(cards=cards))
+
+    logger.info(f"Hand rank: {ranked_hand.rank}")
+
+    return ranked_hand.description