From 84ee16536eabd4f637912d25643184cbcc118092 Mon Sep 17 00:00:00 2001
From: Frederick Yin <fkfd@fkfd.me>
Date: Thu, 19 Jan 2023 11:52:19 +0800
Subject: Parse arguments with optparse-applicative

---
 Main.hs | 46 +++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 39 insertions(+), 7 deletions(-)

diff --git a/Main.hs b/Main.hs
index 1244051..1b4996f 100644
--- a/Main.hs
+++ b/Main.hs
@@ -1,12 +1,44 @@
+import Options.Applicative
 import Game (Game(..), Setup(..), beginGame)
 
+setup :: Parser Setup
+setup = Setup
+        <$> option auto
+            (  short 'n'
+            <> long "player-number"
+            <> metavar "n"
+            <> value 4
+            <> help "n players, n must be larger than 2 (default: 4)"
+            )
+        <*> option auto
+            (  short 'r'
+            <> long "rounds"
+            <> metavar "r"
+            <> value 1
+            <> help "play r rounds, r must be at least 1 (default: 1)"
+            )
+        <*> option auto
+            (  short 'd'
+            <> long "decks"
+            <> metavar "d"
+            <> value 2
+            <> help "use d decks 52 cards each, d must be at least 2 (default: 2)"
+            )
+        <*> option auto
+            (  short 'c'
+            <> long "initial-cards"
+            <> metavar "c"
+            <> value 5
+            <> help "deal c cards per player, c must be at least 2 (default: 5)"
+            )
+        <*> switch
+            (  short 'a'
+            <> long "auto"
+            <> help "run in demo mode"
+            )
+
 main :: IO ()
 main = do
-    let setup = Setup { playerN  = 3
-                      , roundN   = 3
-                      , deckN    = 2
-                      , cardN    = 6
-                      , autoMode = True
-                      }
-    beginGame setup
+    let opts = info (setup <**> helper) (fullDesc <> progDesc "One Card")
+    beginGame =<< execParser opts
     return ()
-- 
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