#include "app/trade_raid.h"

namespace sots::app {
namespace {

// The chance helper with its word cost reported rather than assumed: the two early-outs
// return WITHOUT drawing, so a probability outside (0, 1) costs nothing. Counting the draws
// instead of the calls is what keeps the ledger honest if a loaded tuning table ever pushes
// one of the three odds to 0 or 1.
bool ChanceCounted(sots::sim::IRandom& rng, float p, int& words) {
    if (p <= 0.f) return false;
    if (p >= 1.f) return true;
    ++words;
    return p > rng.NextFloat();
}

}  // namespace

bool Chance(sots::sim::IRandom& rng, float p) {
    int ignored = 0;
    return ChanceCounted(rng, p, ignored);
}

TradeRaidResult RollTradeRaids(sots::sim::IRandom& rng, int players, const TradeRaidOdds& odds,
                               const TradeRaidGates& gates) {
    TradeRaidResult r;
    if (players <= 0) return r;
    r.players = players;
    for (int i = 0; i < players; ++i) {
        if (ChanceCounted(rng, odds.player, r.words)) ++r.playerRaidHits;
        if (gates.npcRaids && ChanceCounted(rng, odds.npc, r.words)) ++r.npcRaidHits;
        if (gates.refugeeRaids && ChanceCounted(rng, odds.refugee, r.words)) ++r.refugeeRaidHits;
    }
    return r;
}

}  // namespace sots::app