package logger

import (
	"fmt"

	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
)

// loggerConfig 内部配置结构体
type loggerConfig struct {
	level       zapcore.Level
	development bool
	encoding    string
	outputPaths []string
}

// LoggerOption 配置选项函数类型
type LoggerOption func(*loggerConfig)

// WithLevel 设置日志级别
func WithLevel(level zapcore.Level) LoggerOption {
	return func(c *loggerConfig) {
		c.level = level
	}
}

// WithOutputPaths 设置输出路径
func WithOutputPaths(paths ...string) LoggerOption {
	return func(c *loggerConfig) {
		c.outputPaths = paths
	}
}

// WithDevelopment 设置开发模式
func WithDevelopment(dev bool) LoggerOption {
	return func(c *loggerConfig) {
		c.development = dev
	}
}

// WithEncoding 设置编码格式
func WithEncoding(encoding string) LoggerOption {
	return func(c *loggerConfig) {
		c.encoding = encoding
	}
}

// zapLogger Zap日志器实现
type zapLogger struct {
	*zap.Logger
}

// NewLogger 创建新的日志器
func NewLogger(opts ...LoggerOption) (Logger, error) {
	config := &loggerConfig{
		level:       zapcore.InfoLevel,
		development: false,
		encoding:    "json",
		outputPaths: []string{"stdout"},
	}

	for _, opt := range opts {
		opt(config)
	}

	zapConfig := zap.Config{
		Level:       zap.NewAtomicLevelAt(config.level),
		Development: config.development,
		Encoding:    config.encoding,
		EncoderConfig: zapcore.EncoderConfig{
			TimeKey:        "timestamp",
			LevelKey:       "level",
			NameKey:        "logger",
			CallerKey:      "caller",
			FunctionKey:    zapcore.OmitKey,
			MessageKey:     "message",
			StacktraceKey:  "stacktrace",
			LineEnding:     zapcore.DefaultLineEnding,
			EncodeLevel:    zapcore.LowercaseLevelEncoder,
			EncodeTime:     zapcore.ISO8601TimeEncoder,
			EncodeDuration: zapcore.SecondsDurationEncoder,
			EncodeCaller:   zapcore.ShortCallerEncoder,
		},
		OutputPaths:      config.outputPaths,
		ErrorOutputPaths: []string{"stderr"},
	}

	logger, err := zapConfig.Build()
	if err != nil {
		return nil, fmt.Errorf("failed to build zap logger: %w", err)
	}

	return &zapLogger{Logger: logger}, nil
}

// Debug 记录调试日志
func (l *zapLogger) Debug(msg string, fields ...zap.Field) {
	l.Logger.Debug(msg, fields...)
}

// Info 记录信息日志
func (l *zapLogger) Info(msg string, fields ...zap.Field) {
	l.Logger.Info(msg, fields...)
}

// Warn 记录警告日志
func (l *zapLogger) Warn(msg string, fields ...zap.Field) {
	l.Logger.Warn(msg, fields...)
}

// Error 记录错误日志
func (l *zapLogger) Error(msg string, fields ...zap.Field) {
	l.Logger.Error(msg, fields...)
}

// Fatal 记录致命日志
func (l *zapLogger) Fatal(msg string, fields ...zap.Field) {
	l.Logger.Fatal(msg, fields...)
}

// With 创建带有额外字段的日志器
func (l *zapLogger) With(fields ...zap.Field) Logger {
	return &zapLogger{Logger: l.Logger.With(fields...)}
}

// Named 创建带有名称的日志器
func (l *zapLogger) Named(name string) Logger {
	return &zapLogger{Logger: l.Logger.Named(name)}
}

// Sync 同步日志输出
func (l *zapLogger) Sync() error {
	return l.Logger.Sync()
}