refactor: move logger to internal package

counter.go

@@ -51,7 +51,7 @@ func (c *counter) rng(f func(key interface{}, count float64)) {
 func interface2key(i interface{}) interface{} {
 	rt := reflect.TypeOf(i)
 	if rt.Kind() == reflect.Ptr {
-		return fmt.Sprintf("%v", i)
+		return fmt.Sprintf("%#v", i)
 	}
 	return i
 }

examples/nim/nim_test.go

@@ -18,7 +18,7 @@ func TestNim(t *testing.T) {
 				playerToMove: 1,
 				chips:        chips,
 			}
-			move := mcts.ComputeMove(state, mcts.MaxIterations(100000), mcts.Verbose(true))
+			move := mcts.ComputeMove(state, mcts.MaxIterations(100000))
 			assert.Equal(t, chips%4, move)
 		}
 	}

examples/tictactoe/tictactoe_test.go

@@ -20,7 +20,7 @@ func TestTicTacToe(t *testing.T) {
 			{0, 0, 0},
 		},
 	}
-	mctsMove := mcts.ComputeMove(rootState, mcts.MaxIterations(20000), mcts.Verbose(true))
+	mctsMove := mcts.ComputeMove(rootState, mcts.MaxIterations(20000))
 	m := mctsMove.(move)
 	assert.Equal(t, 1, m.x)
 	assert.Equal(t, 1, m.y)
@@ -34,7 +34,7 @@ func TestTicTacToe(t *testing.T) {
 			{0, -1, 0},
 		},
 	}
-	mctsMove = mcts.ComputeMove(rootState, mcts.Verbose(true))
+	mctsMove = mcts.ComputeMove(rootState, mcts.MaxIterations(20000))
 	m = mctsMove.(move)
 	assert.Equal(t, 1, m.v)
 

logger.go → internal/log/logger.go

@@ -2,9 +2,11 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
-package mcts
+package log
 
 import (
+	"os"
+
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )
@@ -13,11 +15,14 @@ var (
 	defaultLogger Logger
 )
 
+// Init logger with level
 func init() {
-	// TODO: parse env config and add file log
 	cfg := zap.NewDevelopmentConfig()
 	cfg.EncoderConfig.EncodeTime = zapcore.RFC3339TimeEncoder
 	cfg.EncoderConfig.EncodeCaller = nil
+	if _, ok := os.LookupEnv("GO_MCTS_DEBUG"); !ok {
+		cfg.Level = zap.NewAtomicLevelAt(zapcore.InfoLevel)
+	}
 	zapLogger, _ := cfg.Build()
 	defaultLogger = zapLogger.Sugar()
 }

mcts_test.go

@@ -122,10 +122,10 @@ type testGameMove int
 
 func TestMCTS(t *testing.T) {
 	state := newTestGameState(1)
-	move := ComputeMove(state, Verbose(true))
+	move := ComputeMove(state)
 	assert.Equal(t, 2, move)
 
 	state = newTestGameState(2)
-	move = ComputeMove(state, Verbose(true))
+	move = ComputeMove(state)
 	assert.Equal(t, 1, move)
 }

options.go

@@ -14,14 +14,12 @@ type Options struct {
 	Goroutines    int
 	MaxIterations int
 	MaxTime       time.Duration
-	Verbose       bool
 }
 
 var defaultOptions = Options{
 	Goroutines:    runtime.NumCPU(),
 	MaxIterations: 10000,
 	MaxTime:       -1,
-	Verbose:       false,
 }
 
 type Option func(*Options)
@@ -49,13 +47,6 @@ func MaxTime(d time.Duration) Option {
 	}
 }
 
-// Verbose print details log, default is false
-func Verbose(v bool) Option {
-	return func(o *Options) {
-		o.Verbose = v
-	}
-}
-
 func newOptions(opts ...Option) Options {
 	options := defaultOptions
 

uct.go

@@ -7,6 +7,8 @@ package mcts
 import (
 	"math/rand"
 	"time"
+
+	"github.com/go-mcts/mcts/internal/log"
 )
 
 func computeTree(rootState State, rd *rand.Rand, opts ...Option) *node {
@@ -48,16 +50,14 @@ func computeTree(rootState State, rd *rand.Rand, opts ...Option) *node {
 			node = node.parent
 		}
 
-		if options.Verbose || options.MaxTime >= 0 {
-			now := time.Now()
-			if options.Verbose && (now.Sub(printTime) >= time.Second || i == options.MaxIterations) {
-				Debugf("%d games played (%.2f / second).", i, float64(i)/now.Sub(startTime).Seconds())
-				printTime = now
-			}
+		now := time.Now()
+		if now.Sub(printTime) >= time.Second || i == options.MaxIterations {
+			log.Debugf("%d games played (%.2f / second).", i, float64(i)/now.Sub(startTime).Seconds())
+			printTime = now
+		}
 
-			if options.MaxTime >= 0 && now.Sub(startTime) >= options.MaxTime {
-				break
-			}
+		if options.MaxTime >= 0 && now.Sub(startTime) >= options.MaxTime {
+			break
 		}
 	}
 
@@ -114,29 +114,25 @@ func ComputeMove(rootState State, opts ...Option) Move {
 			bestScore = expectedSuccessRate
 		}
 
-		if options.Verbose {
-			Debugf("Move: %v (%2d%% visits) (%2d%% wins)",
-				move, int(100.0*v/float64(gamePlayed)+0.5), int(100.0*w/v+0.5))
-		}
+		log.Debugf("Move: %v (%2d%% visits) (%2d%% wins)",
+			move, int(100.0*v/float64(gamePlayed)+0.5), int(100.0*w/v+0.5))
 	})
 
-	if options.Verbose {
-		bestWins := wins.get(bestMove)
-		bestVisits := visits.get(bestMove)
-		Debugf("Best: %v (%2d%% visits) (%2d%% wins)",
-			bestMove,
-			int(100.0*bestVisits/float64(gamePlayed)+0.5),
-			int(100.0*bestWins/bestVisits+0.5),
-		)
-
-		now := time.Now()
-		Debugf(
-			"%d games played in %.2f s. (%.2f / second, %d parallel jobs).",
-			gamePlayed,
-			now.Sub(startTime).Seconds(),
-			float64(gamePlayed)/now.Sub(startTime).Seconds(),
-			options.Goroutines,
-		)
-	}
+	bestWins := wins.get(bestMove)
+	bestVisits := visits.get(bestMove)
+	log.Infof("Best: %v (%2d%% visits) (%2d%% wins)",
+		bestMove,
+		int(100.0*bestVisits/float64(gamePlayed)+0.5),
+		int(100.0*bestWins/bestVisits+0.5),
+	)
+
+	now := time.Now()
+	log.Infof(
+		"%d games played in %.2f s. (%.2f / second, %d parallel jobs).",
+		gamePlayed,
+		now.Sub(startTime).Seconds(),
+		float64(gamePlayed)/now.Sub(startTime).Seconds(),
+		options.Goroutines,
+	)
 	return bestMove
 }