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

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

#[derive(Debug,Clone,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: Uuid,
    pub resolution: Resolution,
}

impl Cast {
    pub fn new(source_cryp_id: Uuid, source_team_id: Uuid, target_cryp_id: Uuid, skill: Skill) -> Cast {
        return Cast {
            id: Uuid::new_v4(),
            source_cryp_id,
            source_team_id,
            target_cryp_id,
            skill,
            resolution: Resolution::new(skill),
        };
    }

    pub fn new_tick(source: &mut Cryp, target: &mut Cryp, skill: Skill) -> Cast {
        Cast::new(source.id, source.account, target.id, skill)
    }

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

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


#[derive(Debug,Clone,PartialEq,Serialize,Deserialize)]
pub struct Immunity {
    pub immune: bool,
    pub effects: Vec<Effect>
}

impl Immunity {
    fn new() -> Immunity {
        Immunity { immune: false, effects: vec![] }
    }
}

#[derive(Debug,Clone,PartialEq,Serialize,Deserialize)]
pub struct Disable {
    pub disabled: bool,
    pub effects: Vec<Effect>
}

impl Disable {
    fn new() -> Disable {
        Disable { disabled: false, effects: vec![] }
    }
}

#[derive(Debug,Clone,PartialEq,Serialize,Deserialize)]
pub enum ResolutionResult {
    Damage { amount: u64, mitigation: u64, category: Category , immunity: Immunity },
    Healing { amount: u64, overhealing: u64, category: Category , immunity: Immunity },
    Effect { effect: Effect, duration: u8, immunity: Immunity },
    Removal { effect: Effect, immunity: Immunity },
    Evasion { skill: Skill, evasion_rating: u64 },
}

#[derive(Debug,Clone,PartialEq,Serialize,Deserialize)]
pub struct Resolution {
    pub skill: Skill,
    pub disable: Disable,
    pub speed: u64,
    pub results: Vec<ResolutionResult>,
}

impl Resolution {
    fn new(skill: Skill) -> Resolution {
        Resolution { skill, results: vec![], disable: Disable::new(), speed: 0 }
    }
}

pub type Cooldown = Option<u8>;

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

    Empower,

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

    // magic immunity
    Shield,

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

    SpeedSiphon,
    SpeedIncrease,

    Ko,
}

impl Effect {
    pub fn immune(&self, skill: Skill) -> bool {
        match self {
            Effect::Parry => match skill.category() {
                Category::Blue => false,
                Category::Red => true,
                _ => false,
            },
            Effect::Shield => match skill.category() {
                Category::Blue => true,
                Category::Red => false,
                _ => false,
            },
            Effect::Banish => true,
            _ => false,
        }
    }

    pub fn disables_skill(&self, skill: Skill) -> bool {
        match self {
            Effect::Stun => true,
            Effect::Hex => true,
            Effect::Banish => true,
            Effect::Silence => match skill.category() {
                Category::Blue => true,
                Category::Red => false,
                _ => false,
            },
            Effect::Snare => match skill.category() {
                Category::Blue => false,
                Category::Red => true,
                _ => false,
            },

            Effect::Ko => match skill.category() {
                Category::BlueTick => false,
                _ => true,
            },
            _ => false,
        }
    }

    pub fn modifications(&self) -> Vec<Stat> {
        match self {
            Effect::Empower => vec![Stat::RedDamage],
            Effect::Vulnerable => vec![Stat::RedDamageTaken],
            Effect::Block => vec![Stat::RedDamageTaken],

            Effect::Amplify => vec![Stat::BlueDamage],
            Effect::Curse => vec![Stat::BlueDamageTaken],

            Effect::Haste => vec![Stat::Speed],
            Effect::Slow => vec![Stat::Speed],

            _ => vec![],
        }
    }

    // maybe increase by rng
    // roll little endian bits
    // and OR with base stat
    pub fn apply(&self, value: u64) -> u64 {
        match self {
            Effect::Empower     => value << 1,
            Effect::Vulnerable  => value << 1,
            Effect::Block       => value >> 1,

            Effect::Amplify     => value << 1,
            Effect::Curse       => value << 1,

            Effect::Haste       => value << 1,
            Effect::Slow        => value >> 1,

            _ => {
                println!("{:?} does not have a mod effect", self);
                return value;
            },
        }
    }

    pub fn category(&self) -> Category {
        match self {
            // physical
            Effect::Stun => Category::RedDebuff,
            Effect::Block => Category::RedBuff,
            Effect::Parry => Category::RedBuff,
            Effect::Bleed => Category::RedDebuff,
            Effect::Leech => Category::RedDebuff,
            Effect::Airborne => Category::RedDebuff,
            Effect::Untouchable => Category::RedBuff,
            Effect::Deadly => Category::RedBuff,
            Effect::Vulnerable => Category::RedDebuff,
            Effect::Fury => Category::RedBuff,
            Effect::Blind => Category::RedDebuff,
            Effect::Snare => Category::RedDebuff,

            Effect::Empower => Category::RedBuff,

            // magic
            Effect::Hex => Category::BlueDebuff,
            Effect::Curse => Category::BlueDebuff,
            Effect::Banish => Category::BlueDebuff, // todo randomise
            Effect::Slow => Category::BlueDebuff,
            Effect::Haste => Category::BlueBuff,
            Effect::Enslave => Category::BlueDebuff,
            Effect::Mesmerise => Category::BlueDebuff,
            Effect::Amplify => Category::BlueBuff,
            Effect::Silence => Category::BlueDebuff,

            // magic immunity
            Effect::Shield => Category::BlueBuff,

            // effects over time
            Effect::Triage => Category::BlueBuff,
            Effect::Decay => Category::BlueDebuff,
            Effect::Regen => Category::BlueBuff,
            Effect::Siphon => Category::BlueDebuff,

            Effect::SpeedSiphon => Category::BlueDebuff,
            Effect::SpeedIncrease => Category::BlueBuff,

            Effect::Ko => Category::Ko,
        }
    }

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

            Effect::Vulnerable => 2,
            Effect::Snare => 2,

            Effect::Empower => 2,

            Effect::Hex => 2,
            Effect::Curse => 2,
            Effect::Banish => 1,

            Effect::Slow => 2,
            Effect::Haste => 2,

            Effect::Amplify => 2,
            Effect::Silence => 2,

            Effect::Shield => 2,

            Effect::Triage => 3,
            Effect::Decay => 3,
            Effect::Siphon => 2,

            _ => {
                println!("{:?} does not have a duration", self);
                return 1;
            },
        }
    }

}

#[derive(Debug,Clone,Copy,PartialEq,Serialize,Deserialize)]
pub enum Category {
    Red,
    RedHeal,
    RedDamage,
    RedDebuff,
    RedBuff,
    RedTick,
    Blue,
    BlueDamage,
    BlueHeal,
    BlueDebuff,
    BlueBuff,
    BlueTick,
    Ko,
}

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

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


    Strike,
    Stun,
    // Evade, // actively evade

    // -----------------
    // Nonviolence
    // -----------------
    Heal,
    Triage, // hot
    TriageTick,
    Throw, // no damage stun, adds vulnerable

    // Sleep,
    // Nightmare,

    // -------------------
    // Destruction
    // -------------------
    Blast,
    Amplify,
    Decay, // dot
    DecayTick, // dot
    Siphon,
    SiphonTick,
    Curse,

    // -----------------
    // Purity
    // -----------------
    Empower,
    Shield,
    Silence,
    Purify,
    Purge,

    // -----------------
    // Chaos
    // -----------------
    Banish,
    Hex,
    Haste,
    Slow,

    // used by tests, no cd, no damage
    TestTouch,
    TestStun,
    TestBlock,
    TestParry,
    TestSiphon,
}

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

            // -----------------
            // Nature
            // -----------------
            Skill::Block => None, // reduce damage
            Skill::Parry => None, // avoid all damage
            Skill::Snare => Some(1),



            Skill::Stun => Some(1),

            // -----------------
            // Technology
            // -----------------

            // -----------------
            // Preservation
            // -----------------
            Skill::Heal => None,
            Skill::Triage => None, // hot
            Skill::TriageTick => None,
            Skill::Throw => Some(1), // no damage stun, adds vulnerable

            // -----------------
            // Destruction
            // -----------------
            Skill::Blast => None,
            Skill::Amplify => Some(1),
            Skill::Decay => None, // dot
            Skill::DecayTick => None,
            Skill::Siphon => Some(1),
            Skill::SiphonTick => None,
            Skill::Curse => Some(1),

            // -----------------
            // Purity
            // -----------------
            Skill::Empower => Some(1),
            Skill::Shield => None,
            Skill::Silence => Some(1),
            Skill::Purify => None,
            Skill::Purge => None,

            // -----------------
            // Chaos
            // -----------------
            Skill::Banish => Some(1),
            Skill::Hex => None,
            Skill::Haste => None,
            Skill::Slow => None,

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

    pub fn category(&self) -> Category {
        match self {
            Skill::Attack => Category::Red,
            Skill::Strike => Category::Red,

            // -----------------
            // Nature
            // -----------------
            Skill::Block => Category::Red, // reduce damage
            Skill::Parry => Category::Red, // avoid all damage
            Skill::Snare => Category::Red,



            Skill::Stun => Category::Red,

            // -----------------
            // Technology
            // -----------------

            // -----------------
            // Preservation
            // -----------------
            Skill::Heal => Category::Red,
            Skill::Triage => Category::Blue, // hot
            Skill::TriageTick => Category::BlueTick, // hot
            Skill::Throw => Category::Red, // no damage stun, adds vulnerable

            // -----------------
            // Destruction
            // -----------------
            Skill::Blast => Category::Blue,
            Skill::Amplify => Category::Blue,
            Skill::Decay => Category::Blue, // dot
            Skill::DecayTick => Category::BlueTick, // hot
            Skill::Siphon => Category::Blue,
            Skill::SiphonTick => Category::BlueTick, // hot
            Skill::Curse => Category::Blue,

            // -----------------
            // Purity
            // -----------------
            Skill::Empower => Category::Red,
            Skill::Shield => Category::Blue,
            Skill::Silence => Category::Blue,
            Skill::Purify => Category::Blue,
            Skill::Purge => Category::Blue,

            // -----------------
            // Chaos
            // -----------------
            Skill::Banish => Category::Blue,
            Skill::Hex => Category::Blue,
            // Skill::Lag => 2, //
            Skill::Haste => Category::Blue,
            Skill::Slow => Category::Blue,


            // -----------------
            // Test
            // -----------------
            Skill::TestTouch => Category::Red,
            Skill::TestStun => Category::Red,
            Skill::TestParry => Category::Red,
            Skill::TestBlock => Category::Red,
            Skill::TestSiphon => Category::Blue,
        }
    }

    pub fn ko_castable(&self) -> bool {
        match self {
            Skill::TriageTick => true,
            Skill::DecayTick => true,
            Skill::SiphonTick => true,
            _ => false,
        }
    }

    pub fn speed(&self) -> u8 {
        match self {

            // defensive block
            Skill::Block => 10, // reduce damage
            Skill::Parry => 10, // avoid all damage
            Skill::Snare => 10,
            Skill::Shield => 10, // avoid magic damage,

            // fast phys combat
            Skill::Attack => 5,
            Skill::Strike => 10,
            Skill::Banish => 5,
            Skill::Blast => 5,
            Skill::Decay => 5, // dot

            // magic combat trickery
            Skill::Triage => 3, // hot
            Skill::Slow => 3,
            Skill::Amplify => 3,
            Skill::Curse => 3,
            Skill::Empower => 3,
            Skill::Haste => 3,

            // general combat
            Skill::DecayTick => 2, // hot
            Skill::Siphon => 2,
            Skill::SiphonTick => 2, // hot
            Skill::Hex => 2,
            Skill::Silence => 2,
            Skill::Stun => 2,
            Skill::Throw => 2, // no damage stun, adds vulnerable
            Skill::TriageTick => 2, // hot

            Skill::Heal => 1,
            Skill::Purify => 1,
            Skill::Purge => 1,

            // unimplemented
            // Skill::Lag => 2, //

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

    pub fn resolve(&self, source: &mut Cryp, target: &mut Cryp) -> Resolution {
        let mut rng = thread_rng();
        let _base: u64 = rng.gen();

        let speed = source.skill_speed(*self);

        let mut resolution = Resolution { skill: *self, results: vec![], disable: source.disabled(*self), speed };

        if target.is_ko() {
            return resolution;
        }

        if resolution.disable.disabled {
            return resolution;
        }

        match self.category() == Category::Red {
            true => {
                if let Some(evasion) = target.evade(*self) {
                    resolution.results.push(evasion);
                    return resolution;
                }
            },
            false => (),
        }

        match self {
            Skill::Attack => attack(source, target, resolution),
            // -----------------
            // Nature
            // -----------------
            Skill::Strike => strike(source, target, resolution),
            Skill::Block => block(source, target, resolution),
            Skill::Parry => parry(source, target, resolution),
            Skill::Snare => snare(source, target, resolution), // TODO prevent physical moves


            Skill::Stun => stun(source, target, resolution),

            // -----------------
            // Technology
            // -----------------

            // -----------------
            // Preservation
            // -----------------
            Skill::Heal => heal(source, target, resolution),
            Skill::Triage => triage(source, target, resolution), // hot
            Skill::TriageTick => triage_tick(source, target, resolution), // hot
            Skill::Throw => throw(source, target, resolution), // no damage stun, adds vulnerable

            // -----------------
            // Destruction
            // -----------------
            Skill::Blast => blast(source, target, resolution),
            Skill::Amplify => amplify(source, target, resolution), // increase magic damage
            Skill::Decay => decay(source, target, resolution), // dot
            Skill::DecayTick => decay_tick(source, target, resolution), // dot
            Skill::Siphon => siphon(source, target, resolution),
            Skill::SiphonTick => siphon_tick(source, target, resolution), // hot
            Skill::Curse => curse(source, target, resolution),

            // -----------------
            // Purity
            // -----------------
            Skill::Empower => empower(source, target, resolution), // increased phys damage
            Skill::Shield => shield(source, target, resolution), // target is immune to magic damage and fx
            Skill::Silence => silence(source, target, resolution), // target cannot cast spells
            Skill::Purify => purify(source, target, resolution), // dispel all debuffs
            Skill::Purge => purge(source, target, resolution), // dispel all buffs

            // -----------------
            // Chaos
            // -----------------
            Skill::Banish => banish(source, target, resolution), // TODO prevent all actions
            Skill::Hex => hex(source, target, resolution), // todo prevent casting
            Skill::Haste => haste(source, target, resolution), // speed slow
            Skill::Slow => slow(source, target, resolution), // speed slow

            // -----------------
            // Test
            // -----------------
            Skill::TestTouch => Resolution { skill: Skill::TestTouch, results: vec![], disable: Disable::new(), speed: 0 },
            Skill::TestStun => stun(source, target, resolution),
            Skill::TestBlock => block(source, target, resolution),
            Skill::TestParry => parry(source, target, resolution),
            Skill::TestSiphon => siphon(source, target, resolution),
        }
    }

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

    pub fn defensive(&self) -> bool {
        match self {
            Skill::Heal |
            Skill::Triage |
            Skill::Empower |
            Skill::Purify |
            Skill::Parry |
            Skill::Block => true,
            _ => false,
        }
    }
}

fn attack(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let amount = cryp.red_damage();
    resolution.results.push(target.deal_red_damage(Skill::Attack, amount));
    return resolution;
}

fn stun(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let effect = CrypEffect { effect: Effect::Stun, duration: Effect::Stun.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Stun, effect));
    return resolution;
}

fn throw(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let stun = CrypEffect { effect: Effect::Stun, duration: Effect::Stun.duration(), tick: None };
    let vulnerable = CrypEffect { effect: Effect::Vulnerable, duration: Effect::Vulnerable.duration(), tick: None };

    resolution.results.push(target.add_effect(Skill::Throw, stun));
    resolution.results.push(target.add_effect(Skill::Throw, vulnerable));

    return resolution;
}


fn block(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let block = CrypEffect { effect: Effect::Block, duration: Effect::Block.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Block, block));
    return resolution;
}

fn parry(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let effect = CrypEffect { effect: Effect::Parry, duration: Effect::Parry.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Parry, effect));
    return resolution;
}


fn snare(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let snare = CrypEffect { effect: Effect::Snare, duration: Effect::Snare.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Snare, snare));
    return resolution;
}

fn empower(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let empower = CrypEffect { effect: Effect::Empower, duration: Effect::Empower.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Empower, empower));
    return resolution;
}

fn heal(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let amount = cryp.blue_damage();
    resolution.results.push(target.heal(Skill::Heal, amount));
    return resolution;
}

fn triage(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let triage = CrypEffect {
        effect: Effect::Triage,
        duration: Effect::Triage.duration(),
        tick: Some(Cast::new_tick(cryp, target, Skill::TriageTick)),
    };
    let immunity = target.immune(Skill::Triage);
    let immune = immunity.immune;

    let snare_result = ResolutionResult::Effect {
        effect: triage.effect,
        duration: triage.duration,
        immunity,
    };

    resolution.results.push(snare_result);

    if !immune {
        target.effects.push(triage);
    }

    return resolution;
}

fn triage_tick(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let amount = cryp.blue_damage().wrapping_div(2);
    resolution.results.push(target.heal(Skill::TriageTick, amount));
    return resolution;
}

fn blast(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let amount = cryp.blue_damage();
    resolution.results.push(target.deal_blue_damage(Skill::Blast, amount));
    return resolution;
}

fn amplify(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let amplify = CrypEffect { effect: Effect::Amplify, duration: Effect::Amplify.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Amplify, amplify));
    return resolution;;
}

fn haste(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let effect = CrypEffect { effect: Effect::Haste, duration: Effect::Haste.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Haste, effect));
    return resolution;;
}

fn slow(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let effect = CrypEffect { effect: Effect::Slow, duration: Effect::Slow.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Slow, effect));
    return resolution;;
}

fn decay(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let decay = CrypEffect {
        effect: Effect::Decay,
        duration: Effect::Decay.duration(),
        tick: Some(Cast::new_tick(cryp, target, Skill::DecayTick)),
    };
    resolution.results.push(target.add_effect(Skill::Decay, decay));
    return resolution;
}

fn decay_tick(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let amount = cryp.blue_damage();
    resolution.results.push(target.deal_blue_damage(Skill::DecayTick, amount));
    return resolution;
}

fn hex(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let hex = CrypEffect { effect: Effect::Hex, duration: Effect::Hex.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Hex, hex));
    return resolution;;
}

fn curse(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let curse = CrypEffect { effect: Effect::Curse, duration: Effect::Curse.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Curse, curse));
    return resolution;;
}

fn siphon(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let siphon = CrypEffect {
        effect: Effect::Siphon,
        duration: Effect::Siphon.duration(),
        tick: Some(Cast::new_tick(cryp, target, Skill::SiphonTick)),
    };
    resolution.results.push(target.add_effect(Skill::Siphon, siphon));
    return resolution;;
}

fn siphon_tick(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let amount = cryp.blue_damage();
    let siphon_damage = target.deal_blue_damage(Skill::SiphonTick, amount);
    resolution.results.push(siphon_damage.clone());

    match siphon_damage {
        ResolutionResult::Damage { amount, mitigation, category: _, immunity } => {
            if !immunity.immune {
                resolution.results.push(cryp.heal(Skill::Heal, amount));
            }
        },
        _ => panic!("siphon tick damage not dealt {:?}", siphon_damage),
    }

    return resolution;
}

fn shield(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let shield = CrypEffect { effect: Effect::Shield, duration: Effect::Shield.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Shield, shield));
    return resolution;
}

fn silence(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let silence = CrypEffect { effect: Effect::Silence, duration: Effect::Silence.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Silence, silence));
    return resolution;
}

fn purge(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let immunity = target.immune(Skill::Purge);
    let immune = immunity.immune;

    if !immune {
        for (i, ce) in target.effects.clone().iter_mut().enumerate() {
            if ce.effect.category() == Category::BlueBuff {
                target.effects.remove(i);
                resolution.results.push(ResolutionResult::Removal { effect: ce.effect, immunity: immunity.clone() });
            }
        }
    }

    return resolution;
}

fn purify(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let immunity = target.immune(Skill::Purify);
    let immune = immunity.immune;

    if !immune {
        for (i, ce) in target.effects.clone().iter_mut().enumerate() {
            if ce.effect.category() == Category::BlueDebuff {
                target.effects.remove(i);
                resolution.results.push(ResolutionResult::Removal { effect: ce.effect, immunity: immunity.clone() });
            }
        }
    }

    return resolution;
}

fn banish(_cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let banish = CrypEffect { effect: Effect::Banish, duration: Effect::Banish.duration(), tick: None };
    resolution.results.push(target.add_effect(Skill::Banish, banish));
    return resolution;
}

fn strike(cryp: &mut Cryp, target: &mut Cryp, mut resolution: Resolution) -> Resolution {
    let amount = cryp.red_damage();
    resolution.results.push(target.deal_red_damage(Skill::Attack, u64::max_value()));
    return resolution;
}


#[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_red_damage(Skill::Attack, 5);

        heal(&mut y, &mut x, Resolution::new(Skill::Heal));
    }

    #[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, Resolution::new(Skill::Triage));

        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.hp().saturating_sub(decay.unwrap().tick.unwrap().amount));
    }

    #[test]
    fn block_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();

        // ensure it doesn't have 0 pd
        x.red_damage.force(100);
        y.hp.force(500);

        block(&mut y.clone(), &mut y, Resolution::new(Skill::Block));
        assert!(y.effects.iter().any(|e| e.effect == Effect::Block));

        let res = attack(&mut x, &mut y, Resolution::new(Skill::Attack));

        match res.results[0] {
            ResolutionResult::Damage { amount, mitigation: _, category: _, immunity: _ } => assert_eq!(amount, 50),
            _ => panic!("not damage"),
        };
    }

    #[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();

        // ensure it doesn't have 0 sd
        x.blue_damage.force(50);

        // remove all mitigation
        y.red_shield.force(0);
        y.blue_shield.force(0);

        y.deal_red_damage(Skill::Attack, 5);
        let prev_hp = y.hp();

        let res = Resolution::new(Skill::Triage);

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

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

        let res = Resolution::new(Skill::TriageTick);
        triage_tick(&mut x, &mut y, res);

        assert!(y.hp() > prev_hp);
    }

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

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

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

        x.blue_damage.force(50);

        amplify(&mut x.clone(), &mut x, Resolution::new(Skill::Amplify));
        assert!(x.effects.iter().any(|e| e.effect == Effect::Amplify));
        assert_eq!(x.blue_damage(), 100);
    }

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

        decay(&mut x.clone(), &mut x, Resolution::new(Skill::Decay));
        assert!(x.effects.iter().any(|e| e.effect == Effect::Decay));

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






// pub enum Skill {
//     Attack,

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

//     Paralyse,

//     Strangle, // physical dot and disable
//     Strike,
//     Stun,
//     // Evade, // actively evade


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

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

//     // Sleep,
//     // Nightmare,

//     // -------------------
//     // Destruction
//     // -------------------
//     Blast,
//     Amplify,
//     Decay, // dot
//     DecayTick, // dot
//     Siphon,
//     SiphonTick,
//     Curse,
//     Plague, // aoe dot
//     Ruin, // aoe

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

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

//     // used by tests, no cd, no damage
//     TestTouch,
//     TestStun,
//     TestBlock,
//     TestParry,
//     TestSiphon,
// }