package typeutil

import (
	"log"
	"strconv"
)

func ToBool(v interface{}) (rv bool) {
	switch v.(type) {
	case bool:
		rv = v.(bool)
	case string:
		str := v.(string)
		switch str {
		case "true":
			rv = true
		case "1":
			rv = true
		}
	case float64:
		if v.(float64) > 0 {
			rv = true
		}
	default:
		log.Println("Can't convert", v, "to bool")
		panic("Can't convert value")
	}
	return rv

}

func ToString(v interface{}) (rv string) {
	switch v.(type) {
	case string:
		rv = v.(string)
	case float64:
		rv = strconv.FormatFloat(v.(float64), 'f', -1, 64)
	default:
		log.Println("Can't convert", v, "to string")
		panic("Can't convert value")
	}
	return rv
}

func ToInt(v interface{}) (rv int) {
	switch v.(type) {
	case string:
		i, err := strconv.Atoi(v.(string))
		if err != nil {
			panic("Error converting weight to integer")
		}
		rv = i
	case float64:
		rv = int(v.(float64))
	default:
		log.Println("Can't convert", v, "to integer")
		panic("Can't convert value")
	}
	return rv
}