use common::comp;
use hashbrown::HashMap;
use serde::{Deserialize, Serialize};
use std::string::ToString;
use vek::Vec3;

#[derive(Serialize, Deserialize)]
pub struct HumanoidBody {
    pub species: u8,
    pub body_type: u8,
    pub hair_style: u8,
    pub beard: u8,
    pub eyes: u8,
    pub accessory: u8,
    pub hair_color: u8,
    pub skin: u8,
    pub eye_color: u8,
}

impl From<&comp::humanoid::Body> for HumanoidBody {
    fn from(body: &comp::humanoid::Body) -> Self {
        HumanoidBody {
            species: body.species as u8,
            body_type: body.body_type as u8,
            hair_style: body.hair_style,
            beard: body.beard,
            eyes: body.eyes,
            accessory: body.accessory,
            hair_color: body.hair_color,
            skin: body.skin,
            eye_color: body.eye_color,
        }
    }
}

/// A serializable model used to represent a generic Body. Since all variants
/// of Body except Humanoid (currently) have the same struct layout, a single
/// struct is used for persistence conversions.
#[derive(Serialize, Deserialize)]
pub struct GenericBody {
    pub species: String,
    pub body_type: String,
}

macro_rules! generic_body_from_impl {
    ($body_type:ty) => {
        impl From<&$body_type> for GenericBody {
            fn from(body: &$body_type) -> Self {
                GenericBody {
                    species: body.species.to_string(),
                    body_type: body.body_type.to_string(),
                }
            }
        }
    };
}

generic_body_from_impl!(comp::quadruped_low::Body);
generic_body_from_impl!(comp::quadruped_medium::Body);
generic_body_from_impl!(comp::quadruped_small::Body);

#[derive(Serialize, Deserialize)]
pub struct CharacterPosition {
    pub waypoint: Vec3<f32>,
}

pub fn skill_group_to_db_string(skill_group: comp::skillset::SkillGroupKind) -> String {
    use comp::{item::tool::ToolKind, skillset::SkillGroupKind::*};
    let skill_group_string = match skill_group {
        General => "General",
        Weapon(ToolKind::Sword) => "Weapon Sword",
        Weapon(ToolKind::Axe) => "Weapon Axe",
        Weapon(ToolKind::Hammer) => "Weapon Hammer",
        Weapon(ToolKind::Bow) => "Weapon Bow",
        Weapon(ToolKind::Staff) => "Weapon Staff",
        Weapon(ToolKind::Sceptre) => "Weapon Sceptre",
        Weapon(ToolKind::Pick) => "Weapon Pick",
        Weapon(ToolKind::Dagger)
        | Weapon(ToolKind::Shield)
        | Weapon(ToolKind::Spear)
        | Weapon(ToolKind::Blowgun)
        | Weapon(ToolKind::Debug)
        | Weapon(ToolKind::Farming)
        | Weapon(ToolKind::Empty)
        | Weapon(ToolKind::Natural) => panic!(
            "Tried to add unsupported skill group to database: {:?}",
            skill_group
        ),
    };
    skill_group_string.to_string()
}

pub fn db_string_to_skill_group(skill_group_string: &str) -> comp::skillset::SkillGroupKind {
    use comp::{item::tool::ToolKind, skillset::SkillGroupKind::*};
    match skill_group_string {
        "General" => General,
        "Weapon Sword" => Weapon(ToolKind::Sword),
        "Weapon Axe" => Weapon(ToolKind::Axe),
        "Weapon Hammer" => Weapon(ToolKind::Hammer),
        "Weapon Bow" => Weapon(ToolKind::Bow),
        "Weapon Staff" => Weapon(ToolKind::Staff),
        "Weapon Sceptre" => Weapon(ToolKind::Sceptre),
        "Weapon Pick" => Weapon(ToolKind::Pick),
        _ => panic!(
            "Tried to convert an unsupported string from the database: {}",
            skill_group_string
        ),
    }
}

#[derive(Serialize, Deserialize)]
pub struct DatabaseAbilitySet {
    mainhand: Option<comp::item::tool::ToolKind>,
    offhand: Option<comp::item::tool::ToolKind>,
    abilities: Vec<comp::ability::AuxiliaryAbility>,
}

pub fn active_abilities_to_db_model(
    active_abilities: &comp::ability::ActiveAbilities,
) -> Vec<DatabaseAbilitySet> {
    active_abilities
        .auxiliary_sets
        .iter()
        .map(|((mainhand, offhand), abilities)| DatabaseAbilitySet {
            mainhand: *mainhand,
            offhand: *offhand,
            abilities: abilities.to_vec(),
        })
        .collect::<Vec<_>>()
}

pub fn active_abilities_from_db_model(
    ability_sets: Vec<DatabaseAbilitySet>,
) -> comp::ability::ActiveAbilities {
    let ability_sets = ability_sets
        .iter()
        .map(
            |DatabaseAbilitySet {
                 mainhand,
                 offhand,
                 abilities,
             }| {
                let mut auxiliary_abilities =
                    [comp::ability::AuxiliaryAbility::Empty; comp::ability::MAX_ABILITIES];
                for (empty, ability) in auxiliary_abilities.iter_mut().zip(abilities.iter()) {
                    *empty = *ability;
                }
                ((*mainhand, *offhand), auxiliary_abilities)
            },
        )
        .collect::<HashMap<_, _>>();
    comp::ability::ActiveAbilities::new(ability_sets)
}