package game

import (
	"fmt"
	"log"
	"strconv"
	"strings"
)

type Attack struct {
	Damage int
	Range  int
}

func INVALID_ATTACK() Attack {
	return Attack{-1, -1}
}

func (a Attack) String() string {
	if a == INVALID_ATTACK() {
		return "invalid attack"
	}

	if a.Range == 1 {
		return fmt.Sprintf("%d", a.Damage)
	}
	return fmt.Sprintf("%d range %d", a.Damage, a.Range)
}

func parseAttack(attack interface{}) Attack {
	if damage, ok := attack.(int); ok {
		return Attack{damage, 1}
	}

	attackStr := attack.(string)
	tokens := strings.Split(attackStr, " ")
	a, err := strconv.Atoi(tokens[0])
	if err != nil {
		log.Fatalf("Attack %s has no valid Damage value\n", attackStr)
	}

	r := 1
	if len(tokens) == 3 {
		r, err = strconv.Atoi(tokens[2])
		if err != nil {
			log.Fatalf("Attack %s has no valid Range value\n", attackStr)
		}
	}
	return Attack{a, r}
}