First commit of golang CLI.

wild-cli/internal/output/logger.go

@@ -0,0 +1,185 @@
+package output
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/fatih/color"
+	"go.uber.org/zap"
+)
+
+var (
+	// Global state for output formatting
+	colorEnabled = true
+	verboseMode  = false
+
+	// Colors
+	colorInfo    = color.New(color.FgBlue)
+	colorSuccess = color.New(color.FgGreen)
+	colorWarning = color.New(color.FgYellow)
+	colorError   = color.New(color.FgRed)
+	colorHeader  = color.New(color.FgBlue, color.Bold)
+)
+
+// Logger provides structured logging with colored output
+type Logger struct {
+	zap *zap.Logger
+}
+
+// NewLogger creates a new logger instance
+func NewLogger() *Logger {
+	config := zap.NewDevelopmentConfig()
+	config.DisableStacktrace = true
+	config.Level = zap.NewAtomicLevelAt(zap.InfoLevel)
+
+	if verboseMode {
+		config.Level = zap.NewAtomicLevelAt(zap.DebugLevel)
+	}
+
+	logger, _ := config.Build()
+
+	return &Logger{
+		zap: logger,
+	}
+}
+
+// Sync flushes any buffered log entries
+func (l *Logger) Sync() error {
+	return l.zap.Sync()
+}
+
+// Info logs an info message
+func (l *Logger) Info(msg string, keysAndValues ...interface{}) {
+	l.zap.Sugar().Infow(msg, keysAndValues...)
+
+	// Also print to stdout with formatting
+	if colorEnabled {
+		_, _ = fmt.Fprintf(os.Stdout, "%s %s\n", colorInfo.Sprint("INFO:"), msg)
+	} else {
+		_, _ = fmt.Fprintf(os.Stdout, "INFO: %s\n", msg)
+	}
+}
+
+// Success logs a success message
+func (l *Logger) Success(msg string, keysAndValues ...interface{}) {
+	l.zap.Sugar().Infow(msg, keysAndValues...)
+
+	if colorEnabled {
+		_, _ = fmt.Fprintf(os.Stdout, "%s %s\n", colorSuccess.Sprint("SUCCESS:"), msg)
+	} else {
+		_, _ = fmt.Fprintf(os.Stdout, "SUCCESS: %s\n", msg)
+	}
+}
+
+// Warning logs a warning message
+func (l *Logger) Warning(msg string, keysAndValues ...interface{}) {
+	l.zap.Sugar().Warnw(msg, keysAndValues...)
+
+	if colorEnabled {
+		fmt.Fprintf(os.Stderr, "%s %s\n", colorWarning.Sprint("WARNING:"), msg)
+	} else {
+		fmt.Fprintf(os.Stderr, "WARNING: %s\n", msg)
+	}
+}
+
+// Error logs an error message
+func (l *Logger) Error(msg string, keysAndValues ...interface{}) {
+	l.zap.Sugar().Errorw(msg, keysAndValues...)
+
+	if colorEnabled {
+		fmt.Fprintf(os.Stderr, "%s %s\n", colorError.Sprint("ERROR:"), msg)
+	} else {
+		fmt.Fprintf(os.Stderr, "ERROR: %s\n", msg)
+	}
+}
+
+// Debug logs a debug message (only shown in verbose mode)
+func (l *Logger) Debug(msg string, keysAndValues ...interface{}) {
+	l.zap.Sugar().Debugw(msg, keysAndValues...)
+
+	if verboseMode {
+		if colorEnabled {
+			_, _ = fmt.Fprintf(os.Stdout, "%s %s\n", color.New(color.FgMagenta).Sprint("DEBUG:"), msg)
+		} else {
+			_, _ = fmt.Fprintf(os.Stdout, "DEBUG: %s\n", msg)
+		}
+	}
+}
+
+// Header prints a formatted header
+func (l *Logger) Header(msg string) {
+	if colorEnabled {
+		_, _ = fmt.Fprintf(os.Stdout, "\n%s\n\n", colorHeader.Sprintf("=== %s ===", msg))
+	} else {
+		_, _ = fmt.Fprintf(os.Stdout, "\n=== %s ===\n\n", msg)
+	}
+}
+
+// Printf provides formatted output
+func (l *Logger) Printf(format string, args ...interface{}) {
+	fmt.Printf(format, args...)
+}
+
+// Print provides simple output
+func (l *Logger) Print(msg string) {
+	fmt.Println(msg)
+}
+
+// Global functions for package-level access
+
+// DisableColor disables colored output
+func DisableColor() {
+	colorEnabled = false
+	color.NoColor = true
+}
+
+// SetVerbose enables or disables verbose mode
+func SetVerbose(enabled bool) {
+	verboseMode = enabled
+}
+
+// Package-level convenience functions
+func Info(msg string) {
+	if colorEnabled {
+		_, _ = fmt.Fprintf(os.Stdout, "%s %s\n", colorInfo.Sprint("INFO:"), msg)
+	} else {
+		_, _ = fmt.Fprintf(os.Stdout, "INFO: %s\n", msg)
+	}
+}
+
+func Success(msg string) {
+	if colorEnabled {
+		_, _ = fmt.Fprintf(os.Stdout, "%s %s\n", colorSuccess.Sprint("SUCCESS:"), msg)
+	} else {
+		_, _ = fmt.Fprintf(os.Stdout, "SUCCESS: %s\n", msg)
+	}
+}
+
+func Warning(msg string) {
+	if colorEnabled {
+		fmt.Fprintf(os.Stderr, "%s %s\n", colorWarning.Sprint("WARNING:"), msg)
+	} else {
+		fmt.Fprintf(os.Stderr, "WARNING: %s\n", msg)
+	}
+}
+
+func Error(msg string) {
+	if colorEnabled {
+		fmt.Fprintf(os.Stderr, "%s %s\n", colorError.Sprint("ERROR:"), msg)
+	} else {
+		fmt.Fprintf(os.Stderr, "ERROR: %s\n", msg)
+	}
+}
+
+func Header(msg string) {
+	if colorEnabled {
+		_, _ = fmt.Fprintf(os.Stdout, "\n%s\n\n", colorHeader.Sprintf("=== %s ===", msg))
+	} else {
+		_, _ = fmt.Fprintf(os.Stdout, "\n=== %s ===\n\n", msg)
+	}
+}
+
+// Printf provides formatted output (package-level function)
+func Printf(format string, args ...interface{}) {
+	fmt.Printf(format, args...)
+}