use core::num::NonZeroU8;

use serde::{Deserialize, Serialize};
use werewolves_macros::{ChecksAs, Titles};

use crate::{
    character::CharacterId,
    diedto::DiedTo,
    game::{DateTime, Village},
    message::CharacterIdentity,
};

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize, ChecksAs, Titles)]
pub enum Role {
    #[checks(Alignment::Village)]
    Villager,
    #[checks(Alignment::Wolves)]
    #[checks("killer")]
    #[checks("powerful")]
    Scapegoat { redeemed: bool },
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Seer,
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Arcanist,
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Adjudicator,
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    PowerSeer,
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Mortician,
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Beholder,
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    MasonLeader {
        recruits_available: u8,
        recruits: Box<[CharacterId]>,
    },
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    Empath { cursed: bool },
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Vindicator,
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Diseased,
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    BlackKnight { attacked: Option<DiedTo> },
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Weightlifter,
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    PyreMaster { villagers_killed: u8 },
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Gravedigger,
    #[checks(Alignment::Village)]
    #[checks("killer")]
    #[checks("powerful")]
    #[checks("is_mentor")]
    #[checks]
    Hunter { target: Option<CharacterId> },
    #[checks(Alignment::Village)]
    #[checks("killer")]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Militia { targeted: Option<CharacterId> },
    #[checks(Alignment::Wolves)]
    #[checks("killer")]
    #[checks("powerful")]
    #[checks("is_mentor")]
    MapleWolf { last_kill_on_night: u8 },
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("killer")]
    #[checks("is_mentor")]
    Guardian {
        last_protected: Option<PreviousGuardianAction>,
    },
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Protector { last_protected: Option<CharacterId> },
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    Apprentice(RoleTitle),
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    #[checks("is_mentor")]
    Elder {
        knows_on_night: NonZeroU8,
        woken_for_reveal: bool,
        lost_protection_night: Option<NonZeroU8>,
    },
    #[checks(Alignment::Village)]
    #[checks("powerful")]
    Insomniac,

    #[checks(Alignment::Wolves)]
    #[checks("killer")]
    #[checks("powerful")]
    #[checks("wolf")]
    Werewolf,
    #[checks(Alignment::Wolves)]
    #[checks("killer")]
    #[checks("powerful")]
    #[checks("wolf")]
    AlphaWolf { killed: Option<CharacterId> },
    #[checks(Alignment::Village)]
    #[checks("killer")]
    #[checks("powerful")]
    #[checks("wolf")]
    DireWolf,
    #[checks(Alignment::Wolves)]
    #[checks("killer")]
    #[checks("powerful")]
    #[checks("wolf")]
    Shapeshifter { shifted_into: Option<CharacterId> },
    #[checks(Alignment::Wolves)]
    #[checks("killer")]
    #[checks("powerful")]
    #[checks("wolf")]
    LoneWolf,
}

impl Role {
    /// [RoleTitle] as shown to the player on role assignment
    pub const fn initial_shown_role(&self) -> RoleTitle {
        match self {
            Role::Apprentice(_) | Role::Elder { .. } | Role::Insomniac => RoleTitle::Villager,
            _ => self.title(),
        }
    }

    pub const fn wakes_night_zero(&self) -> bool {
        match self {
            Role::Insomniac
            | Role::PowerSeer
            | Role::Beholder
            | Role::Adjudicator
            | Role::DireWolf
            | Role::Arcanist
            | Role::Seer => true,

            Role::LoneWolf
            | Role::Shapeshifter { .. }
            | Role::Werewolf
            | Role::AlphaWolf { .. }
            | Role::Elder { .. }
            | Role::Gravedigger
            | Role::Hunter { .. }
            | Role::Militia { .. }
            | Role::MapleWolf { .. }
            | Role::Guardian { .. }
            | Role::Apprentice(_)
            | Role::Villager
            | Role::Scapegoat { .. }
            | Role::Mortician
            | Role::MasonLeader { .. }
            | Role::Empath { .. }
            | Role::Vindicator
            | Role::Diseased
            | Role::BlackKnight { .. }
            | Role::Weightlifter
            | Role::PyreMaster { .. }
            | Role::Protector { .. } => false,
        }
    }

    pub fn wakes(&self, village: &Village) -> bool {
        let night_zero = match village.date_time() {
            DateTime::Day { number: _ } => return false,
            DateTime::Night { number } => number == 0,
        };
        if night_zero {
            return self.wakes_night_zero();
        }
        match self {
            Role::AlphaWolf { killed: Some(_) }
            | Role::Werewolf
            | Role::Scapegoat { redeemed: false }
            | Role::Militia { targeted: Some(_) }
            | Role::Diseased
            | Role::BlackKnight { .. }
            | Role::Villager => false,

            Role::LoneWolf => match village.date_time() {
                DateTime::Day { number: _ } => return false,
                DateTime::Night { number } => NonZeroU8::new(number),
            }
            .map(|night| village.executions_on_day(night))
            .map(|execs| execs.iter().any(|e| e.is_wolf()))
            .unwrap_or_default(),

            Role::Insomniac
            | Role::PowerSeer
            | Role::Mortician
            | Role::Beholder
            | Role::MasonLeader { .. }
            | Role::Empath { .. }
            | Role::Vindicator
            | Role::Weightlifter
            | Role::PyreMaster { .. }
            | Role::Adjudicator
            | Role::Scapegoat { redeemed: true }
            | Role::Shapeshifter { .. }
            | Role::DireWolf
            | Role::AlphaWolf { killed: None }
            | Role::Arcanist
            | Role::Protector { .. }
            | Role::Gravedigger
            | Role::Hunter { .. }
            | Role::Militia { targeted: None }
            | Role::MapleWolf { .. }
            | Role::Guardian { .. }
            | Role::Seer => true,

            Role::Apprentice(title) => village
                .characters()
                .iter()
                .any(|c| c.role_title() == *title),

            Role::Elder {
                knows_on_night,
                woken_for_reveal,
                ..
            } => {
                !woken_for_reveal
                    && match village.date_time() {
                        DateTime::Night { number } => number == knows_on_night.get(),
                        _ => false,
                    }
            }
        }
    }
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub enum Alignment {
    Village,
    Wolves,
}

#[derive(Debug, Clone, Serialize, Deserialize, ChecksAs)]
pub enum ArcanistCheck {
    #[checks]
    Same,
    #[checks]
    Different,
}

pub const MAPLE_WOLF_ABSTAIN_LIMIT: NonZeroU8 = NonZeroU8::new(3).unwrap();
pub const PYREMASTER_VILLAGER_KILLS_TO_DIE: NonZeroU8 = NonZeroU8::new(2).unwrap();

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum RoleBlock {
    Direwolf,
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub enum PreviousGuardianAction {
    Protect(CharacterIdentity),
    Guard(CharacterIdentity),
}