// Package logger define log struct of modelRT project
package logger

import (
	"context"
	"sync"

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

var (
	f     *facade
	fOnce sync.Once
)

type facade struct {
	_logger *zap.Logger
}

// Debug define facade func of debug level log
func Debug(ctx context.Context, msg string, kv ...any) {
	logFacade().log(ctx, zapcore.DebugLevel, msg, kv...)
}

// Info define facade func of info level log
func Info(ctx context.Context, msg string, kv ...any) {
	logFacade().log(ctx, zapcore.InfoLevel, msg, kv...)
}

// Warn define facade func of warn level log
func Warn(ctx context.Context, msg string, kv ...any) {
	logFacade().log(ctx, zapcore.WarnLevel, msg, kv...)
}

// Error define facade func of error level log
func Error(ctx context.Context, msg string, kv ...any) {
	logFacade().log(ctx, zapcore.ErrorLevel, msg, kv...)
}

func (f *facade) log(ctx context.Context, lvl zapcore.Level, msg string, kv ...any) {
	f.logSkip(ctx, lvl, 0, msg, kv...)
}

func (f *facade) logSkip(ctx context.Context, lvl zapcore.Level, extraSkip int, msg string, kv ...any) {
	fields := makeLogFieldsSkip(ctx, extraSkip, kv...)
	ce := f._logger.Check(lvl, msg)
	ce.Write(fields...)
}

// ErrorSkip logs at error level with extra caller skip frames for wrapper functions.
func ErrorSkip(ctx context.Context, extraSkip int, msg string, kv ...any) {
	logFacade().logSkip(ctx, zapcore.ErrorLevel, extraSkip, msg, kv...)
}

// WarnSkip logs at warn level with extra caller skip frames for wrapper functions.
func WarnSkip(ctx context.Context, extraSkip int, msg string, kv ...any) {
	logFacade().logSkip(ctx, zapcore.WarnLevel, extraSkip, msg, kv...)
}

// InfoSkip logs at info level with extra caller skip frames for wrapper functions.
func InfoSkip(ctx context.Context, extraSkip int, msg string, kv ...any) {
	logFacade().logSkip(ctx, zapcore.InfoLevel, extraSkip, msg, kv...)
}

func logFacade() *facade {
	fOnce.Do(func() {
		f = &facade{
			_logger: GetLoggerInstance(),
		}
	})
	return f
}