package gamelogic

import (
	"math/rand"
	"sort"
)

type cardlogic struct {
	cards            []int
	currentCardIndex int
}

func newCardLogic() *cardlogic {
	ret := new(cardlogic)
	ret.initData()
	return ret
}

func (cl *cardlogic) initData() {
	cl.shuffle()
}

func (cl *cardlogic) shuffle() {
	cl.currentCardIndex = 0
	cl.cards = make([]int, CARD_COUNT)
	for d := 0; d < CARD_COUNT; d++ {
		cl.cards[d] = d
	}

	for i := CARD_COUNT - 1; i > 1; i-- {
		place := rand.Intn(i)
		tmp := cl.cards[place]
		cl.cards[place] = cl.cards[i]
		cl.cards[i] = tmp
	}
}

func (cl *cardlogic) getHandCards() []int {
	ret := make([]int, HOLD_CARD_COUNT)
	for i := 0; i < HOLD_CARD_COUNT; i++ {
		ret[i] = cl.getOneCard()
	}
	sort.Slice(ret, func(i, j int) bool {
		return ret[i] < ret[j]
	})
	return ret
}

func (cl *cardlogic) getOneCard() int {
	ret := cl.cards[cl.currentCardIndex]
	cl.currentCardIndex++
	return ret
}