use rand::{thread_rng, Rng};
use uuid::Uuid;

use game::{Log};
use cryp::{Cryp, CrypEffect, Stat};

#[derive(Debug,Clone,Copy,PartialEq,Serialize,Deserialize)]
pub struct Cast {
    pub id: Uuid,
    pub skill: Skill, pub source_team_id: Uuid,
    pub source_cryp_id: Uuid,
    pub target_cryp_id: Option<Uuid>,
    pub target_team_id: Uuid,
}

impl Cast {
    pub fn new(source_cryp_id: Uuid, source_team_id: Uuid, target_team_id: Option<Uuid>, skill: Skill) -> Cast {

        let (target_cryp_id, target_team_id) = match skill.self_targeting() {
            true => (Some(source_cryp_id), source_team_id),
            false => (None, target_team_id.unwrap())
        };

        return Cast {
            id: Uuid::new_v4(),
            source_cryp_id,
            source_team_id,
            target_cryp_id,
            target_team_id,
            skill,
        };
    }

    pub fn new_tick(source: &mut Cryp, target: &mut Cryp, skill: Skill) -> Cast {
        let mut cast = Cast::new(source.id, source.account, Some(target.account), skill);
        cast.set_target(target.id);
        return cast;
    }

    pub fn set_resolution(&mut self, cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) -> &mut Cast {
        self.skill.resolve(cryp, target, log);
        self
    }

    pub fn set_target(&mut self, cryp_id: Uuid) -> &mut Cast {
        self.target_cryp_id = Some(cryp_id);
        self
    }

    pub fn used_cooldown(&self) -> bool {
        return self.skill.cd().is_some();
    }
}

#[derive(Debug,Clone,PartialEq,Serialize,Deserialize)]
pub struct Resolution {
    pub base: u64,
    pub result: Option<u64>,
}

pub type Cooldown = Option<u8>;

#[derive(Debug,Clone,Copy,PartialEq,Serialize,Deserialize)]
pub enum Effect {
    // physical
    Stun,
    Block,
    Bleed,
    Leech,
    Airborne,
    Untouchable,
    Deadly,
    Vulnerable,
    Fury,
    Evasion,
    Blind,
    Snare,

    Empower,

    // magic
    Hex,
    Curse,
    Banish,
    Slow,
    Haste,
    Enslave,
    Mesmerise,
    Amplify,
    Silence,

    // magic immunity
    Shield,

    // effects over time
    Triage,
    Decay,
    Regen,
    Drain,

    SpeedDrain,
    SpeedIncrease,
}

impl Effect {
    pub fn immune(&self, skill: Skill) -> bool {
        match self {
            Effect::Block => match skill {
                Skill::Stun |
                Skill::TestStun |
                Skill::Attack => true,
                _ => false,
            },
            Effect::Shield => match skill.cast_type() {
                Damage::Magic => true,
                Damage::Physical => false,
            }
            _ => false,
        }
    }

    pub fn prevents_casting(&self, skill: Skill) -> bool {
        match self {
            Effect::Stun => true,
            Effect::Silence => match skill.cast_type() {
                Damage::Magic => true,
                Damage::Physical => false,
            },
            _ => false,
        }
    }

    pub fn modifications(&self) -> Vec<Stat> {
        match self {
            Effect::Amplify => vec![Stat::SpellDmg],
            Effect::Empower => vec![Stat::PhysDmg],
            _ => vec![],
        }
    }

    // maybe increase by rng
    // roll little endian bits
    // and OR with base stat
    pub fn apply(&self, value: u64) -> u64 {
        match self {
            Effect::Amplify => value << 1,
            Effect::Empower => value << 1,
            _ => panic!("{:?} does not have a mod effect", self),
        }
    }

    pub fn source(&self) -> Source {
        match self {
            // physical
            Effect::Stun => Source::Debuff,
            Effect::Block => Source::Buff,
            Effect::Bleed => Source::Debuff,
            Effect::Leech => Source::Debuff,
            Effect::Airborne => Source::Buff,
            Effect::Untouchable => Source::Buff,
            Effect::Deadly => Source::Buff,
            Effect::Vulnerable => Source::Debuff,
            Effect::Fury => Source::Buff,
            Effect::Evasion => Source::Buff,
            Effect::Blind => Source::Debuff,
            Effect::Snare => Source::Debuff,

            Effect::Empower => Source::Buff,

            // magic
            Effect::Hex => Source::Debuff,
            Effect::Curse => Source::Debuff,
            Effect::Banish => Source::Debuff, // todo randomise
            Effect::Slow => Source::Debuff,
            Effect::Haste => Source::Buff,
            Effect::Enslave => Source::Debuff,
            Effect::Mesmerise => Source::Debuff,
            Effect::Amplify => Source::Buff,
            Effect::Silence => Source::Debuff,

            // magic immunity
            Effect::Shield => Source::Buff,

            // effects over time
            Effect::Triage => Source::Buff,
            Effect::Decay => Source::Debuff,
            Effect::Regen => Source::Buff,
            Effect::Drain => Source::Debuff,

            Effect::SpeedDrain => Source::Debuff,
            Effect::SpeedIncrease => Source::Buff,
        }
    }
}

#[derive(Debug,Clone,Copy,PartialEq,Serialize,Deserialize)]
pub enum Damage {
    Physical,
    Magic,
}

// #[derive(Debug,Clone,Copy,PartialEq,Serialize,Deserialize)]
// enum Style {
//     Offensive,
//     Defensive,
// }

#[derive(Debug,Clone,Copy,PartialEq,Serialize,Deserialize)]
pub enum Source {
    Buff,
    Debuff,
    Stat,
}

#[derive(Debug,Clone,Copy,PartialEq,Serialize,Deserialize)]
pub enum Skill {
    Attack,

    // -----------------
    // Nature
    // -----------------
    Block, // reduce dmg
    Parry, // avoid all dmg
    Snare,

    Paralyse,

    Strangle, // physical dot and disable

    Stun,
    Evade, // actively evade
    Evasion, // adds evasion to cryp


    // -----------------
    // Technology
    // -----------------
    Replicate,
    Swarm,
    Orbit,
    Repair,
    Scan, // track?

    // -----------------
    // Nonviolence
    // -----------------
    Heal,
    Triage, // hot
    TriageTick,
    Throw, // no dmg stun, adds vulnerable
    Charm,
    Calm,
    Rez,

    // -------------------
    // Destruction
    // -------------------
    Blast,
    Amplify,
    Decay, // dot
    DecayTick, // dot
    Drain,
    DrainTick,
    Curse,
    Plague, // aoe dot
    Ruin, // aoe

    // -----------------
    // Purity
    // -----------------
    Empower,
    Slay,
    Shield,
    Silence,
    Inquiry,
    Purify,
    Purge,
    // Precision,

    // -----------------
    // Chaos
    // -----------------
    Banish,
    Hex,
    Fear,
    Taunt,
    Pause, // speed slow

    // used by tests, no cd, no dmg
    TestTouch,
    TestStun,
    TestBlock,
    TestDrain,
}

impl Skill {
    pub fn cd(&self) -> Cooldown {
        match self {
            Skill::Attack => None,

            // -----------------
            // Nature
            // -----------------
            Skill::Block => Some(1), // reduce dmg
            Skill::Parry => Some(1), // avoid all dmg
            Skill::Snare => Some(2),

            Skill::Paralyse => Some(3),
            Skill::Strangle => Some(3),

            // Strangle

            Skill::Stun => Some(1),
            Skill::Evade => Some(2),
            Skill::Evasion => Some(3), // additional layer of dmg avoidance

            // -----------------
            // Technology
            // -----------------
            Skill::Replicate => Some(1),
            Skill::Swarm => Some(3),
            Skill::Orbit => Some(2),
            Skill::Repair => Some(1),
            Skill::Scan => Some(2), // track?

            // -----------------
            // Preservation
            // -----------------
            Skill::Heal => Some(1),
            Skill::Triage => Some(1), // hot
            Skill::TriageTick => None,
            Skill::Throw => Some(2), // no dmg stun, adds vulnerable
            Skill::Charm => Some(2),
            Skill::Calm => Some(2),
            Skill::Rez => Some(4),

            // -----------------
            // Destruction
            // -----------------
            Skill::Blast => Some(1),
            Skill::Amplify => Some(2),
            Skill::Decay => Some(1), // dot
            Skill::DecayTick => None,
            Skill::Drain => Some(2),
            Skill::DrainTick => None,
            Skill::Curse => Some(2),
            Skill::Plague => Some(2), // aoe dot
            Skill::Ruin => Some(3), // aoe

            // -----------------
            // Purity
            // -----------------
            // Skill::Precision => Some(1),
            Skill::Empower => Some(2),
            Skill::Slay => Some(1),
            Skill::Shield => Some(1),
            Skill::Silence => Some(2),
            Skill::Inquiry => Some(2),
            Skill::Purify => Some(1),
            Skill::Purge => Some(1),

            // -----------------
            // Chaos
            // -----------------
            Skill::Banish => Some(2),
            Skill::Hex => Some(1),
            Skill::Fear => Some(1),
            Skill::Taunt => Some(2),
            Skill::Pause => Some(2), // speed slow

            // -----------------
            // Test
            // -----------------
            Skill::TestTouch => None,
            Skill::TestStun => None,
            Skill::TestBlock => None,
            Skill::TestDrain => None,
        }
    }

    pub fn cast_type(&self) -> Damage {
        match self {
            Skill::Attack => Damage::Physical,

            // -----------------
            // Nature
            // -----------------
            Skill::Block => Damage::Physical, // reduce dmg
            Skill::Evade => Damage::Physical,
            Skill::Parry => Damage::Physical, // avoid all dmg
            Skill::Snare => Damage::Physical,

            Skill::Paralyse => Damage::Physical,
            Skill::Strangle => Damage::Physical,

            // Strangle

            Skill::Stun => Damage::Physical,
            Skill::Evasion => Damage::Physical, // additional layer of dmg avoidance

            // -----------------
            // Technology
            // -----------------
            Skill::Replicate => Damage::Physical,
            Skill::Swarm => Damage::Physical,
            Skill::Orbit => Damage::Physical,
            Skill::Repair => Damage::Physical,
            Skill::Scan => Damage::Physical, // track?

            // -----------------
            // Preservation
            // -----------------
            Skill::Heal => Damage::Physical,
            Skill::Triage => Damage::Physical, // hot
            Skill::TriageTick => Damage::Physical, // hot
            Skill::Throw => Damage::Physical, // no dmg stun, adds vulnerable
            Skill::Charm => Damage::Physical,
            Skill::Calm => Damage::Physical,
            Skill::Rez => Damage::Physical,

            // -----------------
            // Destruction
            // -----------------
            Skill::Blast => Damage::Magic,
            Skill::Amplify => Damage::Magic,
            Skill::Decay => Damage::Magic, // dot
            Skill::DecayTick => Damage::Magic, // hot
            Skill::Drain => Damage::Magic,
            Skill::DrainTick => Damage::Magic, // hot
            Skill::Curse => Damage::Magic,
            Skill::Plague => Damage::Magic, // aoe dot
            Skill::Ruin => Damage::Magic, // aoe

            // -----------------
            // Purity
            // -----------------
            // Skill::Precision => 1,
            Skill::Empower => Damage::Physical,
            Skill::Slay => Damage::Physical,
            Skill::Shield => Damage::Magic,
            Skill::Silence => Damage::Magic,
            Skill::Inquiry => Damage::Magic,
            Skill::Purify => Damage::Magic,
            Skill::Purge => Damage::Magic,

            // -----------------
            // Chaos
            // -----------------
            Skill::Banish => Damage::Magic,
            Skill::Hex => Damage::Magic,
            Skill::Fear => Damage::Magic,
            Skill::Taunt => Damage::Magic,
            Skill::Pause => Damage::Magic, // extend durations
            // Skill::Lag => 2, //

            // -----------------
            // Test
            // -----------------
            Skill::TestTouch => Damage::Physical,
            Skill::TestStun => Damage::Physical,
            Skill::TestBlock => Damage::Physical,
            Skill::TestDrain => Damage::Magic,
        }
    }

    pub fn speed(&self) -> u8 {
        match self {
            Skill::Attack => 5,

            // -----------------
            // Nature
            // -----------------
            Skill::Block => 10, // reduce dmg
            Skill::Evade => 10,
            Skill::Parry => 10, // avoid all dmg
            Skill::Snare => 10,

            Skill::Paralyse => 5,
            Skill::Strangle => 5,

            // Strangle

            Skill::Stun => 5,
            Skill::Evasion => 3, // additional layer of dmg avoidance

            // -----------------
            // Technology
            // -----------------
            Skill::Replicate => 1,
            Skill::Swarm => 3,
            Skill::Orbit => 2,
            Skill::Repair => 1,
            Skill::Scan => 2, // track?

            // -----------------
            // Preservation
            // -----------------
            Skill::Heal => 1,
            Skill::Triage => 1, // hot
            Skill::TriageTick => 1, // hot
            Skill::Throw => 2, // no dmg stun, adds vulnerable
            Skill::Charm => 2,
            Skill::Calm => 2,
            Skill::Rez => 4,

            // -----------------
            // Destruction
            // -----------------
            Skill::Blast => 1,
            Skill::Amplify => 2,
            Skill::Decay => 1, // dot
            Skill::DecayTick => 2, // hot
            Skill::Drain => 2,
            Skill::DrainTick => 2, // hot
            Skill::Curse => 2,
            Skill::Plague => 2, // aoe dot
            Skill::Ruin => 3, // aoe

            // -----------------
            // Purity
            // -----------------
            // Skill::Precision => 1,
            Skill::Empower => 2,
            Skill::Slay => 1,
            Skill::Shield => 1,
            Skill::Silence => 2,
            Skill::Inquiry => 2,
            Skill::Purify => 1,
            Skill::Purge => 1,

            // -----------------
            // Chaos
            // -----------------
            Skill::Banish => 2,
            Skill::Hex => 1,
            Skill::Fear => 1,
            Skill::Taunt => 2,
            Skill::Pause => 2, // extend durations
            // Skill::Lag => 2, //

            // -----------------
            // Test
            // -----------------
            Skill::TestTouch => 10,
            Skill::TestStun => 5,
            Skill::TestBlock => 10,
            Skill::TestDrain => 10,
        }
    }

    pub fn resolve(&self, cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
        let mut rng = thread_rng();
        let base: u64 = rng.gen();

        // let res = Resolution { base, result: None };

        //     println!("{:?}'s stats", self.name);
        //     println!("{:064b}   <- finalised", roll.result);
        //     roll.result = roll.result & stat();

        //     println!("{:064b} & <- attribute roll", stat());
        //     println!("{:064b} = {:?}", roll.result, roll.result);
        //     println!("");

        //     return Some(roll);

        let (immune, reason) = target.immune(*self);
        if immune {
            log.push(format!("{:?} -> {:?} | {:?} immune: {:?}", cryp.name, target.name, self, reason));
            return;
        }

        match self {
            Skill::Attack => attack(cryp, target, log),
            // -----------------
            // Nature
            // -----------------
            Skill::Block => block(cryp, target, log),
            Skill::Evade => panic!("nyi"), //
            Skill::Parry => panic!("nyi"), // avoid all dmg
            Skill::Snare => snare(cryp, target, log), // TODO prevent physical moves

            Skill::Paralyse => panic!("nyi"), // no physical moves
            Skill::Strangle => panic!("nyi"), // no physical moves

            Skill::Stun => stun(cryp, target, log),
            Skill::Evasion => panic!("nyi"), // additional layer of dmg avoidance

            // -----------------
            // Technology
            // -----------------
            Skill::Replicate => panic!("nyi"),
            Skill::Swarm => panic!("nyi"),
            Skill::Orbit => panic!("nyi"),
            Skill::Repair => panic!("nyi"),
            Skill::Scan => panic!("nyi"), // track?

            // -----------------
            // Preservation
            // -----------------
            Skill::Heal => heal(cryp, target, log),
            Skill::Triage => triage(cryp, target, log), // hot
            Skill::TriageTick => triage_tick(cryp, target, log), // hot
            Skill::Throw => throw(cryp, target, log), // no dmg stun, adds vulnerable
            Skill::Charm => panic!("nyi"), // target casts random spell on teammate
            Skill::Calm => panic!("nyi"), // physical fear, taunt removal
            Skill::Rez => panic!("nyi"),

            // -----------------
            // Destruction
            // -----------------
            Skill::Blast => blast(cryp, target, log),
            Skill::Amplify => amplify(cryp, target, log), // increase magic dmg
            Skill::Decay => decay(cryp, target, log), // dot
            Skill::DecayTick => decay_tick(cryp, target, log), // hot
            Skill::Drain => drain(cryp, target, log),
            Skill::DrainTick => drain_tick(cryp, target, log), // hot
            Skill::Curse => curse(cryp, target, log),
            Skill::Plague => panic!("nyi"), // dot that spreads every turn
            Skill::Ruin => panic!("nyi"), // aoe version of blast

            // -----------------
            // Purity
            // -----------------
            // Skill::Precision => panic!("nyi"),
            Skill::Empower => empower(cryp, target, log), // increased phys dmg
            Skill::Slay => panic!("nyi"), // phys dmg mult by target magic dmg
            Skill::Shield => shield(cryp, target, log), // target is immune to magic dmg and fx
            Skill::Silence => silence(cryp, target, log), // target cannot cast spells
            Skill::Inquiry => panic!("nyi"), //
            Skill::Purify => purify(cryp, target, log), // dispel all debuffs
            Skill::Purge => purge(cryp, target, log), // dispel all buffs

            // -----------------
            // Chaos
            // -----------------
            Skill::Banish => banish(cryp, target, log), // TODO prevent all actions
            Skill::Hex => hex(cryp, target, log), // todo prevent casting
            Skill::Fear => panic!("nyi"), // cast random spell on self
            Skill::Taunt => panic!("nyi"), // target forced to attack
            Skill::Pause => panic!("nyi"), // speed slow

            // -----------------
            // Test
            // -----------------
            Skill::TestTouch => (),
            Skill::TestStun => stun(cryp, target, log),
            Skill::TestBlock => block(cryp, target, log),
            Skill::TestDrain => drain(cryp, target, log),
        };
    }

    pub fn duration(&self) -> u8 {
        match self {
            Skill::Evade => 1,
            Skill::Stun => 2,
            Skill::Block => 1,

            Skill::Empower => 2,

            Skill::Decay => 3,
            Skill::Drain => 3,
            Skill::Triage => 3,

            Skill::Amplify => 2,
            Skill::Silence => 3,

            Skill::TestBlock => 1,
            Skill::TestStun => 2,
            _ => panic!("{:?} does not have a duration", self),
        }
    }

    pub fn self_targeting(&self) -> bool {
        match self {
            Skill::Block => true,
            Skill::TestBlock => true,
            _ => false,
        }
    }

    pub fn castable(&self, cryp: &Cryp) -> bool {
        !cryp.effects.iter().any(|e| e.effect.prevents_casting(*self))
    }
}

fn attack(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    target.deal_phys_dmg(cryp.phys_dmg());
    log.push(format!("{:?} -> {:?} | Attack for {:?}", cryp.name, target.name, cryp.phys_dmg));
}

fn stun(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let stun = CrypEffect { effect: Effect::Stun, duration: Skill::Stun.duration(), tick: None };
    target.effects.push(stun);
    log.push(format!("{:?} -> {:?} | {:?} for {:?}T", cryp.name, target.name, stun.effect, stun.duration));
}

fn throw(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let stun = CrypEffect { effect: Effect::Stun, duration: Skill::Stun.duration(), tick: None };
    let vulnerable = CrypEffect { effect: Effect::Vulnerable, duration: Skill::Stun.duration(), tick: None };
    target.effects.push(stun);
    target.effects.push(vulnerable);
    log.push(format!("{:?} -> {:?} | {:?} for {:?}T", cryp.name, target.name, stun.effect, stun.duration));
    log.push(format!("{:?} -> {:?} | {:?} for {:?}T", cryp.name, target.name, vulnerable.effect, vulnerable.duration));
}


fn block(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect { effect: Effect::Block, duration: Skill::Block.duration(), tick: None };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn snare(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect { effect: Effect::Snare, duration: Skill::Snare.duration(), tick: None };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn empower(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect { effect: Effect::Empower, duration: Skill::Empower.duration(), tick: None };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn heal(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let (healing, overhealing) = target.heal(cryp.phys_dmg());
    log.push(format!("{:?} -> {:?} | Heal for {:?} ({:?} OH)", cryp.name, target.name, healing, overhealing));
}

fn triage(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect {
        effect: Effect::Triage,
        duration: Skill::Triage.duration(),
        tick: Some(Cast::new_tick(cryp, target, Skill::TriageTick)),
    };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn triage_tick(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let amount = cryp.spell_dmg().wrapping_div(2);
    let (healing, overhealing) = target.heal(amount);
    log.push(format!("{:?} -> {:?} | Triage for {:?} ({:?} OH)", cryp.name, target.name, healing, overhealing));
}

fn blast(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let amount = cryp.spell_dmg();
    log.push(format!("{:?} -> {:?} | Blast for {:?}", cryp.name, target.name, amount));
    target.deal_spell_dmg(amount);
}

fn amplify(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect { effect: Effect::Amplify, duration: Skill::Amplify.duration(), tick: None };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn decay(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect {
        effect: Effect::Decay,
        duration: Skill::Decay.duration(),
        tick: Some(Cast::new_tick(cryp, target, Skill::DecayTick)),
    };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn decay_tick(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let amount = cryp.spell_dmg();
    log.push(format!("{:?} -> {:?} | Decay for {:?}", cryp.name, target.name, amount));
    target.deal_spell_dmg(amount);
}

fn hex(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect { effect: Effect::Hex, duration: Skill::Hex.duration(), tick: None };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn curse(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect { effect: Effect::Curse, duration: Skill::Curse.duration(), tick: None };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn drain(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect {
        effect: Effect::Drain,
        duration: Skill::Drain.duration(),
        tick: Some(Cast::new_tick(cryp, target, Skill::DrainTick)),
    };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn drain_tick(cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    // Damage part
    let (damage, _) = target.deal_spell_dmg(cryp.spell_dmg().wrapping_div(2));
    log.push(format!("{:?} | Drain Damage {:?}", target.name, damage));

    let (healing, overhealing) = target.heal(damage);
    log.push(format!("{:?} | Drain healing {:?} ({:?} OH)", cryp.name, healing, overhealing));
}

fn shield(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect { effect: Effect::Shield, duration: Skill::Shield.duration(), tick: None };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn silence(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect { effect: Effect::Silence, duration: Skill::Silence.duration(), tick: None };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}

fn purge(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    for (i, ce) in target.effects.clone().iter_mut().enumerate() {
        if ce.effect.source() == Source::Buff {
            target.effects.remove(i);
            log.push(format!("{:?} < {:?} purged", target.name, ce.effect));
        }
    }
}

fn purify(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    for (i, ce) in target.effects.clone().iter_mut().enumerate() {
        if ce.effect.source() == Source::Debuff {
            target.effects.remove(i);
            log.push(format!("{:?} < {:?} purified", target.name, ce.effect));
        }
    }
}

fn banish(_cryp: &mut Cryp, target: &mut Cryp, log: &mut Log) {
    let effect = CrypEffect { effect: Effect::Banish, duration: Skill::Banish.duration(), tick: None };
    target.effects.push(effect);
    log.push(format!("{:?} < {:?} for {:?}T", target.name, effect.effect, effect.duration));
}


#[cfg(test)]
mod tests {
    use skill::*;

    #[test]
    fn heal_test() {
        let mut x = Cryp::new()
            .named(&"muji".to_string())
            .level(8)
            .learn(Skill::Heal)
            .create();

        let mut y = Cryp::new()
            .named(&"camel".to_string())
            .level(8)
            .learn(Skill::Heal)
            .create();

        x.deal_phys_dmg(5);

        let mut log = vec![];
        heal(&mut y, &mut x, &mut log);
    }

    #[test]
    fn decay_test() {
        let mut x = Cryp::new()
            .named(&"muji".to_string())
            .level(8)
            .create();

        let mut y = Cryp::new()
            .named(&"camel".to_string())
            .level(8)
            .create();

        let mut log = vec![];
        decay(&mut x, &mut y, &mut log);

        assert!(y.effects.iter().any(|e| e.effect == Effect::Decay));

        y.reduce_effect_durations(&mut log);
        let decay = y.effects.iter().find(|e| e.effect == Effect::Decay);
        // assert!(y.hp() == y.stamina().saturating_sub(decay.unwrap().tick.unwrap().amount));
    }

    #[test]
    fn triage_test() {
        let mut x = Cryp::new()
            .named(&"muji".to_string())
            .level(8)
            .create();

        let mut y = Cryp::new()
            .named(&"pretaliation".to_string())
            .level(8)
            .create();

        let mut log = vec![];

        // ensure it doesn't have 0 sd
        x.spell_dmg.set(50);
        y.deal_phys_dmg(5);
        let prev_hp = y.hp();

        triage(&mut x, &mut y, &mut log);

        assert!(y.effects.iter().any(|e| e.effect == Effect::Triage));

        triage_tick(&mut x, &mut y, &mut log);
        assert!(y.hp() > prev_hp);
    }

    #[test]
    fn silence_test() {
        let mut x = Cryp::new()
            .named(&"muji".to_string())
            .level(8)
            .create();

        let mut log = vec![];

        silence(&mut x.clone(), &mut x, &mut log);
        assert!(x.effects.iter().any(|e| e.effect == Effect::Silence));
        assert!(!Skill::Decay.castable(&x));
    }

    #[test]
    fn amplify_test() {
        let mut x = Cryp::new()
            .named(&"muji".to_string())
            .level(8)
            .create();

        x.spell_dmg.set(50);

        let mut log = vec![];
        amplify(&mut x.clone(), &mut x, &mut log);
        assert!(x.effects.iter().any(|e| e.effect == Effect::Amplify));
        assert_eq!(x.spell_dmg(), 100);
    }

    #[test]
    fn purify_test() {
        let mut x = Cryp::new()
            .named(&"muji".to_string())
            .level(8)
            .create();

        let mut log = vec![];
        decay(&mut x.clone(), &mut x, &mut log);
        assert!(x.effects.iter().any(|e| e.effect == Effect::Decay));

        purify(&mut x.clone(), &mut x, &mut log);
        assert!(!x.effects.iter().any(|e| e.effect == Effect::Decay));
    }
}

// #[derive(Debug,Clone,Copy,PartialEq,Serialize,Deserialize)]
// pub enum Skill {
//   Stoney,
//   Evasive,
// }

// impl Skill {
//   pub fn apply(&self, roll: Roll) -> Roll {
//     match self {
//       Skill::Stoney => stoney(self, roll),
//       Skill::Evasive => evasive(self, roll),
//     }
//   }
// }

// fn stoney(_s: &Skill, mut roll: Roll) -> Roll {
//   let effect = 0b11110000;
//   match roll.kind {
//       StatKind::Def => {
//         // println!("{:064b} | <- {:?}", effect, s);
//         roll.result = roll.result | effect;
//         roll
//       },
//       _ => roll,
//   }
// }

// fn evasive(_s: &Skill, mut roll: Roll) -> Roll {
//   match roll.kind {
//       StatKind::Def => {
//         if roll.result.is_power_of_two() {
//           roll.result = u64::max_value()
//         }
//         roll
//       },
//       _ => roll,
//   }
// }