package dependencies

import (
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
	"io/ioutil"
	"os"
)

func setupLogger() *zap.Logger {
	highPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl >= zapcore.ErrorLevel
	})
	lowPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl < zapcore.ErrorLevel
	})
	fileDebugging := zapcore.AddSync(ioutil.Discard)
	fileErrors := zapcore.AddSync(ioutil.Discard)

	consoleDebugging := zapcore.Lock(os.Stdout)
	consoleErrors := zapcore.Lock(os.Stderr)

	fileEncoder := zapcore.NewJSONEncoder(zap.NewProductionEncoderConfig())
	_ = zapcore.NewConsoleEncoder(zap.NewDevelopmentEncoderConfig())

	core := zapcore.NewTee(
		zapcore.NewCore(fileEncoder, fileErrors, highPriority),
		zapcore.NewCore(fileEncoder, consoleErrors, highPriority),
		zapcore.NewCore(fileEncoder, fileDebugging, lowPriority),
		zapcore.NewCore(fileEncoder, consoleDebugging, lowPriority),
	)

	logger := zap.New(core)
	defer logger.Sync()
	return logger
}