pub struct Stats {
    pub score: u32,
    pub gems: u32,
    pub whips: u32,
    pub whip_power: u32,
    pub teleports: u32,
    pub keys: u32,
}

type PlayerSurvived = bool;

impl Stats {
    pub fn add_score(&mut self, score: u32) {
        self.score += score;
    }

    pub fn take_score(&mut self, score: u32) {
        if let Some(result) = self.score.checked_sub(score) {
            self.score = result;
        } else {
            self.score = 0;
        }
    }

    pub fn give_gems(&mut self, num_gems: u32) {
        self.gems += num_gems;
    }

    pub fn take_gems(&mut self, num_gems: u32) -> PlayerSurvived {
        if let Some(result) = self.gems.checked_sub(num_gems) {
            self.gems = result;
            true
        } else {
            self.gems = 0;
            false
        }
    }

    pub fn give_whips(&mut self, num_whips: u32) {
        self.whips += num_whips;
    }

    pub fn take_whips(&mut self, num_whips: u32) {
        if let Some(result) = self.whips.checked_sub(num_whips) {
            self.whips = result;
        } else {
            self.whips = 0;
        }
    }

    pub fn give_teleports(&mut self, num_teleports: u32) {
        self.teleports += num_teleports;
    }

    pub fn take_teleports(&mut self, num_teleports: u32) {
        if let Some(result) = self.teleports.checked_sub(num_teleports) {
            self.teleports = result;
        } else {
            self.teleports = 0;
        }
    }

    pub fn give_keys(&mut self, num_keys: u32) {
        self.keys += num_keys;
    }

    pub fn take_keys(&mut self, num_keys: u32) {
        if let Some(result) = self.keys.checked_sub(num_keys) {
            self.keys = result;
        } else {
            self.keys = 0;
        }
    }
}