#include "dice_data.h"
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <cstring>

namespace active_dice {
struct DieState {
	Die type;
	uint8_t value;
};
constexpr size_t maxActiveDice{16};
DieState activeDice[maxActiveDice];
size_t numActiveDice{0};

void Add(Die die) {
	if(numActiveDice < maxActiveDice) {
		activeDice[numActiveDice].type = die;
		activeDice[numActiveDice].value = RollDie(die);
		++numActiveDice;
	}
}

void Remove(size_t at) {
	if(at >= numActiveDice) {
		return;
	}
	if(at < numActiveDice - 1) {
		std::memmove(activeDice + at, activeDice + at + 1, sizeof(DieState) * (numActiveDice - at));
	}
	--numActiveDice;
}

void Clear() {
	numActiveDice = 0;
}

Die Get(size_t at) {
	if(at < numActiveDice) {
		return activeDice[at].type;
	} else return D_COIN;
}

uint8_t GetValue(size_t at) {
	if(at < numActiveDice) {
		return activeDice[at].value;
	} else return 0;
}

size_t Count() {
	return numActiveDice;
}

void ReRoll() {
	for(size_t i{0}; i < numActiveDice; ++i) {
		activeDice[i].value = RollDie(activeDice[i].type);
	}
}
}

uint8_t RollDie(Die die) {
	if(die == D_COIN) {
		return std::rand() % 2;
	}
	return 1 + std::rand() % (die-1);
}