use rltk::{Point, RGB};
use serde::{Deserialize, Serialize};
use specs::error::NoError;
use specs::prelude::*;
use specs::saveload::{ConvertSaveload, Marker};
use specs_derive::*;

#[derive(Component, ConvertSaveload, Copy, Clone)]
pub struct Position {
    pub x: i32,
    pub y: i32,
}

impl From<(i32, i32)> for Position {
    fn from(f: (i32, i32)) -> Self {
        Position { x: f.0, y: f.1 }
    }
}

impl From<Point> for Position {
    fn from(p: Point) -> Self {
        Position { x: p.x, y: p.y }
    }
}

impl Into<Point> for Position {
    fn into(self) -> Point {
        Point {
            x: self.x,
            y: self.y,
        }
    }
}

#[derive(Component, ConvertSaveload, Clone)]
pub struct Renderable {
    pub glyph: rltk::FontCharType,
    pub fg: RGB,
    pub bg: RGB,
    pub render_order: i32,
}

#[derive(Component, Debug, Clone, Serialize, Deserialize, Default)]
pub struct Player {}

#[derive(Component, ConvertSaveload, Clone)]
pub struct Viewshed {
    pub visible_tiles: Vec<Point>,
    pub range: i32,
    pub dirty: bool,
}

impl Default for Viewshed {
    fn default() -> Self {
        Viewshed {
            visible_tiles: Vec::new(),
            range: 8,
            dirty: true,
        }
    }
}

#[derive(Component, Debug, Serialize, Deserialize, Clone, Default)]
pub struct Monster {}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct Name {
    pub name: String,
}

impl Name {
    pub fn from<S: ToString>(s: S) -> Self {
        Name {
            name: s.to_string(),
        }
    }
}

#[derive(Component, Debug, Serialize, Deserialize, Clone, Default)]
pub struct BlocksTile {}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct CombatStats {
    pub max_hp: i32,
    pub hp: i32,
    pub defense: i32,
    pub power: i32,
}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct WantsToMelee {
    pub target: Entity,
}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct SufferDamage {
    pub amount: Vec<i32>,
}

impl SufferDamage {
    pub fn new_damage(store: &mut WriteStorage<SufferDamage>, victim: Entity, amount: i32) {
        if let Some(suffering) = store.get_mut(victim) {
            suffering.amount.push(amount);
        } else {
            let dmg = SufferDamage {
                amount: vec![amount],
            };
            store.insert(victim, dmg).expect("Unable to insert damage");
        }
    }
}

#[derive(Component, Debug, Serialize, Deserialize, Clone, Default)]
pub struct Item {}

#[derive(Component, Debug, Serialize, Deserialize, Clone, Default)]
pub struct Consumable {}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct Ranged {
    pub range: i32,
}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct InflictsDamage {
    pub damage: i32,
}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct AreaOfEffect {
    pub radius: i32,
}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct Confusion {
    pub turns: i32,
}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct ProvidesHealing {
    pub heal_amount: i32,
}

#[derive(Component, Debug, ConvertSaveload)]
pub struct InBackpack {
    pub owner: Entity,
}

#[derive(Component, Debug, ConvertSaveload)]
pub struct WantsToPickupItem {
    pub collected_by: Entity,
    pub item: Entity,
}

#[derive(Component, Debug, ConvertSaveload)]
pub struct WantsToUseItem {
    pub item: Entity,
    pub target: Option<Point>,
}

#[derive(Component, Debug, ConvertSaveload)]
pub struct WantsToDropItem {
    pub item: Entity,
}

#[derive(Component, Debug, ConvertSaveload, Clone)]
pub struct WantsToRemoveItem {
    pub item: Entity,
}

#[derive(PartialEq, Copy, Clone, Serialize, Deserialize)]
pub enum EquipmentSlot {
    Melee,
    Shield,
}

#[derive(Component, Serialize, Deserialize, Clone)]
pub struct Equippable {
    pub slot: EquipmentSlot,
}

#[derive(Component, ConvertSaveload, Clone)]
pub struct Equipped {
    pub owner: Entity,
    pub slot: EquipmentSlot,
}

#[derive(Component, ConvertSaveload, Clone)]
pub struct MeleePowerBonus {
    pub power: i32,
}

#[derive(Component, ConvertSaveload, Clone)]
pub struct DefenseBonus {
    pub defense: i32,
}

#[derive(Component, Serialize, Deserialize, Clone)]
pub struct ParticleLifetime {
    pub lifetime_ms: f32,
}

#[derive(Serialize, Deserialize, Copy, Clone, PartialEq)]
pub enum HungerState {
    WellFed,
    Normal,
    Hungry,
    Starving,
}

#[derive(Component, Serialize, Deserialize, Clone)]
pub struct HungerClock {
    pub state: HungerState,
    pub duration: i32,
}

#[derive(Component, Debug, Serialize, Deserialize, Clone)]
pub struct ProvidesFood {}

#[derive(Component, Debug, Serialize, Deserialize, Clone)]
pub struct MagicMapper {}

#[derive(Component, Debug, Serialize, Deserialize, Clone)]
pub struct Hidden {}

#[derive(Component, Debug, Serialize, Deserialize, Clone)]
pub struct EntryTrigger {}

#[derive(Component, Debug, Serialize, Deserialize, Clone)]
pub struct EntityMoved {}

#[derive(Component, Debug, Serialize, Deserialize, Clone)]
pub struct SingleActivation {}

// Serialization helper code. We need to implement ConvertSaveLoad for each type that contains an
// Entity.

pub struct SerializeMe;

// Special component that exists to help serialize the game data
#[derive(Component, Serialize, Deserialize, Clone)]
pub struct SerializationHelper {
    pub map: crate::map::Map,
}