package logx

import (
	"fmt"
	"os"
	"sync"
	"time"

	"cn/oneao/base-go/conf"
	"github.com/cloudwego/hertz/pkg/common/hlog"
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
	"gopkg.in/natefinch/lumberjack.v2"
)

var (
	zapLogger   *zap.Logger
	mu          sync.Mutex
	currentDay  = make(map[string]string)
	currentSync = make(map[string]zapcore.WriteSyncer)
)

// InitLog 从配置初始化日志
func InitLog() {
	cfg := conf.GetConf().Log // LogConfig 从 YAML 读取

	if cfg.Dir == "" {
		cfg.Dir = "./logs"
	}
	if cfg.MaxSize <= 0 {
		cfg.MaxSize = 10
	}
	if cfg.MaxBackups <= 0 {
		cfg.MaxBackups = 30
	}
	if cfg.MaxAge <= 0 {
		cfg.MaxAge = 7
	}

	dynamicLevel := zap.NewAtomicLevel()
	dynamicLevel.SetLevel(LogLevel())

	logger := NewLogger(
		WithCores([]CoreConfig{
			{
				Enc: zapcore.NewConsoleEncoder(consoleEncoderConfig()),
				Ws:  zapcore.AddSync(os.Stdout),
				Lvl: dynamicLevel,
			},
			{
				Enc: zapcore.NewJSONEncoder(humanEncoderConfig()),
				Ws:  getWriteSyncer(fmt.Sprintf("%s/debug", cfg.Dir), &cfg),
				Lvl: zap.LevelEnablerFunc(func(lev zapcore.Level) bool {
					return lev == zap.DebugLevel
				}),
			},
			{
				Enc: zapcore.NewJSONEncoder(humanEncoderConfig()),
				Ws:  getWriteSyncer(fmt.Sprintf("%s/info", cfg.Dir), &cfg),
				Lvl: zap.LevelEnablerFunc(func(lev zapcore.Level) bool {
					return lev == zap.InfoLevel
				}),
			},
			{
				Enc: zapcore.NewJSONEncoder(humanEncoderConfig()),
				Ws:  getWriteSyncer(fmt.Sprintf("%s/warn", cfg.Dir), &cfg),
				Lvl: zap.LevelEnablerFunc(func(lev zapcore.Level) bool {
					return lev == zap.WarnLevel
				}),
			},
			{
				Enc: zapcore.NewJSONEncoder(humanEncoderConfig()),
				Ws:  getWriteSyncer(fmt.Sprintf("%s/error", cfg.Dir), &cfg),
				Lvl: zap.LevelEnablerFunc(func(lev zapcore.Level) bool {
					return lev >= zap.ErrorLevel
				}),
			},
		}...),
	)

	hlog.SetLogger(logger)
	zapLogger = logger.Logger()
}

func getWriteSyncer(basePath string, cfg *conf.LogConfig) zapcore.WriteSyncer {
	mu.Lock()
	defer mu.Unlock()

	today := time.Now().Format("2006-01-02")
	if day, ok := currentDay[basePath]; !ok || day != today {
		currentDay[basePath] = today
		file := fmt.Sprintf("%s/%s.log", basePath, today)

		currentSync[basePath] = zapcore.AddSync(&lumberjack.Logger{
			Filename:   file,
			MaxSize:    cfg.MaxSize,
			MaxBackups: cfg.MaxBackups,
			MaxAge:     cfg.MaxAge,
			Compress:   cfg.Compress,
			LocalTime:  true,
		})
	}
	return currentSync[basePath]
}

func LogLevel() zapcore.Level {
	level := conf.GetConf().Log.Level
	switch level {
	case "trace":
		return zapcore.DebugLevel
	case "debug":
		return zapcore.DebugLevel
	case "info":
		return zapcore.InfoLevel
	case "warn":
		return zapcore.WarnLevel
	case "error":
		return zapcore.ErrorLevel
	case "dpanic":
		return zapcore.DPanicLevel
	case "panic":
		return zapcore.PanicLevel
	case "fatal":
		return zapcore.FatalLevel
	default:
		return zapcore.InfoLevel
	}
}

func consoleEncoderConfig() zapcore.EncoderConfig {
	return zapcore.EncoderConfig{
		MessageKey:   "msg",
		LevelKey:     "level",
		TimeKey:      "ts",
		EncodeTime:   customTimeEncoder,
		EncodeLevel:  zapcore.CapitalColorLevelEncoder,
		EncodeCaller: zapcore.ShortCallerEncoder,
	}
}

func humanEncoderConfig() zapcore.EncoderConfig {
	return zapcore.EncoderConfig{
		MessageKey:     "Message",
		LevelKey:       "Level",
		NameKey:        "Name",
		TimeKey:        "Ts",
		CallerKey:      "Caller",
		FunctionKey:    "Func",
		StacktraceKey:  "Stacktrace",
		LineEnding:     "\n",
		EncodeTime:     customTimeEncoder,
		EncodeLevel:    zapcore.LowercaseLevelEncoder,
		EncodeDuration: zapcore.SecondsDurationEncoder,
		EncodeCaller:   zapcore.ShortCallerEncoder,
	}
}

func customTimeEncoder(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
	enc.AppendString(t.Format("2006-01-02 15:04:05.000"))
}