package zaplog

import (
	"fmt"
	"os"
	"time"

	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
	"gopkg.in/natefinch/lumberjack.v2"
)

// 创建全局写入器缓存
var writeSyncerCache = make(map[string]zapcore.WriteSyncer)

func getWriteSyncer(filename string, maxSize, maxBackups, maxAge int, compress bool) zapcore.WriteSyncer {
	// 生成缓存键
	cacheKey := filename
	if maxSize != 0 || maxBackups != 0 || maxAge != 0 {
		cacheKey = fmt.Sprintf("%s:%d:%d:%d:%v", filename, maxSize, maxBackups, maxAge, compress)
	}

	// 检查缓存
	if ws, ok := writeSyncerCache[cacheKey]; ok {
		return ws
	}

	// 创建新的写入器
	ws := zapcore.AddSync(&lumberjack.Logger{
		Filename:   filename,
		MaxSize:    maxSize,
		MaxBackups: maxBackups,
		MaxAge:     maxAge,
		Compress:   compress,
	})

	// 存入缓存
	writeSyncerCache[cacheKey] = ws
	return ws
}

func textencoderConfig() zapcore.EncoderConfig {
	encoderConfig := zap.NewProductionEncoderConfig()
	encoderConfig.EncodeTime = func(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
		enc.AppendString("[" + t.Format("2006-01-02 15:04:05") + "]")
	}
	encoderConfig.EncodeLevel = func(level zapcore.Level, enc zapcore.PrimitiveArrayEncoder) {
		enc.AppendString("[" + level.CapitalString() + "]")
	}
	return encoderConfig
}

func jsonencoderConfig() zapcore.EncoderConfig {
	encoderConfig := zap.NewProductionEncoderConfig()
	encoderConfig.EncodeTime = func(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
		enc.AppendString(t.Format("2006-01-02 15:04:05"))
	}
	encoderConfig.EncodeLevel = zapcore.CapitalLevelEncoder
	return encoderConfig
}

func New(config ...Config) *zap.SugaredLogger {
	cfg := configDefault(config...)

	var encoder zapcore.Encoder
	if cfg.JsonFormat {
		encoder = zapcore.NewJSONEncoder(jsonencoderConfig())
	} else {
		encoder = zapcore.NewConsoleEncoder(textencoderConfig())
	}

	var coreArr []zapcore.Core

	// 检查并合并相同配置的写入器
	wsCache := make(map[string]zapcore.WriteSyncer)

	// 创建核心的函数
	createCore := func(level zapcore.Level, logConfig LogFileConfig) zapcore.Core {
		// 生成缓存键
		cacheKey := fmt.Sprintf("%s:%d:%d:%d:%v", logConfig.Filename, logConfig.FileSize_MB, logConfig.FileBackup, logConfig.FileAge_DAY, true)

		// 获取或创建写入器
		var ws zapcore.WriteSyncer
		if existingWs, ok := wsCache[cacheKey]; ok {
			ws = existingWs
		} else {
			ws = getWriteSyncer(
				logConfig.Filename,
				logConfig.FileSize_MB,
				logConfig.FileBackup,
				logConfig.FileAge_DAY,
				true,
			)
			wsCache[cacheKey] = ws
		}

		// 创建多写入器(文件+控制台)
		multiWs := zapcore.NewMultiWriteSyncer(ws, zapcore.AddSync(os.Stdout))

		// 创建级别过滤器
		priority := zap.LevelEnablerFunc(func(lev zapcore.Level) bool {
			return lev == level
		})

		return zapcore.NewCore(encoder, multiWs, priority)
	}

	// 为每个级别创建核心
	if cfg.Mode <= Debug {
		coreArr = append(coreArr, createCore(zap.DebugLevel, cfg.DebugLog))
	}
	if cfg.Mode <= Info {
		coreArr = append(coreArr, createCore(zap.InfoLevel, cfg.InfoLog))
	}
	if cfg.Mode <= Warn {
		coreArr = append(coreArr, createCore(zap.WarnLevel, cfg.WarnLog))
	}
	if cfg.Mode <= Error {
		coreArr = append(coreArr, createCore(zap.ErrorLevel, cfg.ErrorLog))
	}
	if cfg.Mode <= DPanic {
		coreArr = append(coreArr, createCore(zap.DPanicLevel, cfg.DPanicLog))
	}
	if cfg.Mode <= Panic {
		coreArr = append(coreArr, createCore(zap.PanicLevel, cfg.PanicLog))
	}
	if cfg.Mode <= Fatal {
		coreArr = append(coreArr, createCore(zap.FatalLevel, cfg.FatalLog))
	}

	return zap.New(zapcore.NewTee(coreArr...), zap.IncreaseLevel(zapcore.Level(cfg.Mode))).Sugar()
}