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use std::collections::HashSet;
use std::hash::Hash;
use serde::{Deserialize, Serialize};

#[derive(Debug)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "serde", serde(rename_all = "camelCase"))]
pub struct ClassProperties {
    pub level: u8,
    /// Index from https://www.dnd5eapi.co/api/subclasses/
    pub subclass: Option<String>,
    /// Indexes from https://www.dnd5eapi.co/api/spells/
    pub spells_index: Vec<String>,
    /// Indexes from https://www.dnd5eapi.co/api/spells/
    pub spells_prepared_index: Vec<String>,
}

impl Default for ClassProperties {
    fn default() -> Self {
        Self {
            level: 1,
            subclass: None,
            spells_index: Vec::new(),
            spells_prepared_index: Vec::new()
        }
    }
}

/// The key is the index of the class from https://www.dnd5eapi.co/api/classes
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "serde", serde(rename_all = "camelCase"))]
pub struct Class(pub String, pub ClassProperties);

impl Hash for Class {
    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
        self.0.hash(state);
    }
}

impl PartialEq for Class {
    fn eq(&self, other: &Self) -> bool {
        self.0 == other.0
    }
}

impl Eq for Class {}

#[derive(Default)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "serde", serde(rename_all = "camelCase"))]
pub struct Classes(pub HashSet<Class>);


impl Classes {
    pub fn get(&self, class: &str) -> Option<&Class> {
        self.0.get(&Class(class.to_string(), ClassProperties::default()))
    }

    pub fn new(class_index: String) -> Self {
        let mut classes = Self::default();
        classes.0.insert(Class(class_index, ClassProperties::default()));
        classes
    }
}