package config

import (
	"encoding/json"
	"fmt"
	"time"
)

// Duration is a wrapper around time.Duration (used for better user experience)
type Duration time.Duration

func (d *Duration) UnmarshalYAML(unmarshal func(interface{}) error) error {
	var v interface{}
	if err := unmarshal(&v); err != nil {
		return err
	}
	switch value := v.(type) {
	case string:
		tmp, err := time.ParseDuration(value)
		if err != nil {
			return err
		}
		*d = Duration(tmp)
		return nil
	case float64:
		return nil
	default:
		return fmt.Errorf("invalid duration %v", value)
	}
}

func (d *Duration) UnmarshalJSON(b []byte) error {
	var v interface{}
	if err := json.Unmarshal(b, &v); err != nil {
		return err
	}
	switch value := v.(type) {
	case string:
		tmp, err := time.ParseDuration(value)
		if err != nil {
			return err
		}
		*d = Duration(tmp)
		return nil
	case float64:
		return nil
	default:
		return fmt.Errorf("invalid duration %v", value)
	}
}

func (d *Duration) Get() time.Duration {
	return time.Duration(*d)
}