package main

import (
	"fmt"
	"io/ioutil"
	"strings"
)

type deck []string

func (d deck) print() {
	for i, card := range d {
		fmt.Println(i, card)
	}
}

func newDeck() deck {
	cards := deck{}
	cardSuits := []string{"Spades", "Diamonds", "Hearts", "Clubs"}
	cardValues := []string{"Ace", "Two", "Three", "Four"}
	for _, suite := range cardSuits {
		for _, value := range cardValues {
			cards = append(cards, value+" of "+suite)
		}
	}
	return cards
}

func deal(d deck, handsize int) (deck, deck) {
	return d[:handsize], d[handsize:]
}

func (d deck) toString(seperator string) string {
	return strings.Join(d, "\n")
}

func fromString(input []byte, seperator string) deck {
	return strings.Split(string(input), seperator)
}

func (d deck) save(filename string) error {
	return ioutil.WriteFile(filename, []byte(d.toString("\n")), 0644)
}

func load(filename string) (deck, error) {
	bytes, err := ioutil.ReadFile(filename)
	return fromString(bytes, "\n"), err
}