package trinary

import (
	"errors"
	"fmt"
	"math"
)

// ParseTrinary takes a trinary string and returns the
// decimal value
func ParseTrinary(in string) (int64, error) {
	fmt.Println("=== New Parse (" + in + ") ===")
	var ret int
	place := len(in)

	for i := range in {
		fmt.Print("Finding ", (place - i), " place value ", string(in[i]))
		switch in[i] {
		case '0':
		case '1':
			ret = ret + ((place - i) * 3)
		case '2':
			ret = ret + ((place - i) * int(math.Pow(3, 2)))
		default:
			return 0, errors.New("Invalid String")
		}
		fmt.Println("==", ret)
		place--
	}
	return int64(ret), nil
}