int auto_warTotalBattles(int plan, int remaining)
{
    // |plan| is a 6-bit bitmask where the lowest bit is a 1
    // if we finish the first quest, etc.

    int total_battles = 0;
    int completed_quests = 0;

    void fightUntilRemaining(int target_remaining)
    {
        int to_kill = max(0, remaining-target_remaining);
        int kills_per_battle = auto_warKillsPerBattle(completed_quests);
        int battles = ceil(to_kill.to_float()/kills_per_battle);

        auto_log_warning("to_kill = " + to_kill, "red");
        auto_log_warning("kills_per_battle = " + kills_per_battle, "red");
        auto_log_warning("battles = " + battles, "red");

        total_battles += battles;
        remaining -= battles * kills_per_battle;
        auto_log_warning("remaining = " + remaining, "red");
    }

    // 3 quests are accessible simultaneously.
    completed_quests += plan&1;
    completed_quests += (plan>>1)&1;
    completed_quests += (plan>>2)&1;

    fightUntilRemaining(1000-64);

    completed_quests += (plan>>3)&1;

    fightUntilRemaining(1000-192);

    completed_quests += (plan>>4)&1;

    fightUntilRemaining(1000-458);

    completed_quests += (plan>>5)&1;

    fightUntilRemaining(0);

    return total_battles;
}

int auto_warTotalBattles(int plan)
{
    return auto_warTotalBattles(plan, auto_warEnemiesRemaining());
}