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use std::collections::HashMap;
use rand::Rng;
use serde::{Serialize, Deserialize};
use entity::item::weapon::{Weapon, WeaponType};
use entity::item::armor::{Armor, ArmorType};
use entity::item::shield::{Shield, ShieldType};
use entity::item::unit::{Unit, UnitType};
use entity::item::tool::{Tool, ToolType};
use entity::item::mag::{Mag, MagType};
use entity::character::SectionID;
use maps::monster::MonsterType;
use maps::room::{Difficulty, Episode};
use maps::area::MapArea;
use crate::{ItemDropType, load_data_file};
use crate::generic_weapon::AttributeTable;
use crate::generic_armor::GenericArmorTable;
use crate::generic_shield::GenericShieldTable;
type ItemParseFn = Box<dyn Fn(&String) -> Option<RareDropItem>>;
#[derive(Debug, Copy, Clone)]
pub enum RareDropItem {
Weapon(WeaponType),
Armor(ArmorType),
Shield(ShieldType),
Unit(UnitType),
Tool(ToolType),
Mag(MagType)
}
impl RareDropItem {
pub fn from_string(name: String) -> RareDropItem {
let parse_funcs: [ItemParseFn; 6] = [
Box::new(|i| Some(RareDropItem::Weapon(str::parse::<WeaponType>(i).ok()?))),
Box::new(|i| Some(RareDropItem::Armor(str::parse::<ArmorType>(i).ok()?))),
Box::new(|i| Some(RareDropItem::Shield(str::parse::<ShieldType>(i).ok()?))),
Box::new(|i| Some(RareDropItem::Unit(str::parse::<UnitType>(i).ok()?))),
Box::new(|i| Some(RareDropItem::Tool(str::parse::<ToolType>(i).ok()?))),
Box::new(|i| Some(RareDropItem::Mag(str::parse::<MagType>(i).ok()?))),
];
for parse in parse_funcs.iter() {
if let Some (k) = parse(&name) {
return k
}
}
panic!()
}
}
pub struct RareDropRate {
pub rate: f32,
pub item: RareDropItem
}
#[derive(Debug, Serialize, Deserialize)]
pub struct RareDropConfigEntity {
pub rate: f32,
pub item: String,
}
pub struct RareDropTable {
rates: HashMap<MonsterType, Vec<RareDropRate>>,
attribute_table: AttributeTable,
armor_stats: GenericArmorTable,
shield_stats: GenericShieldTable,
}
fn load_default_monster_rates(episode: Episode, difficulty: Difficulty, section_id: SectionID) -> HashMap<MonsterType, Vec<RareDropRate>> {
let cfg: HashMap<String, Vec<RareDropConfigEntity>> = load_data_file(episode, difficulty, section_id, "rare_rate.toml");
cfg.into_iter()
.map(|(monster, drops)| {
let monster = monster.parse().unwrap();
let drops = drops.into_iter().map(|drop| {
RareDropRate {
rate: drop.rate,
item: RareDropItem::from_string(drop.item),
}
}).collect();
(monster, drops)
}).collect()
}
impl RareDropTable {
pub fn new(episode: Episode, difficulty: Difficulty, section_id: SectionID) -> RareDropTable {
RareDropTable {
rates: load_default_monster_rates(episode, difficulty, section_id),
attribute_table: AttributeTable::new(episode, difficulty, section_id),
armor_stats: GenericArmorTable::new(episode, difficulty, section_id),
shield_stats: GenericShieldTable::new(episode, difficulty, section_id),
}
}
pub fn builder() -> RareDropTableBuilder {
RareDropTableBuilder {
rates: None,
attribute_table: None,
armor_stats: None,
shield_stats: None,
}
}
pub fn apply_item_stats<R: Rng>(&self, map_area: &MapArea, item: RareDropItem, rng: &mut R) -> ItemDropType {
match item {
RareDropItem::Weapon(weapon) => {
ItemDropType::Weapon(Weapon {
weapon,
special: None,
grind: 0,
attrs: self.attribute_table.generate_rare_attributes(map_area, rng),
tekked: false,
})
},
RareDropItem::Armor(armor) => {
ItemDropType::Armor(Armor {
armor,
dfp: self.armor_stats.dfp_modifier(&armor, rng) as u8,
evp: self.armor_stats.evp_modifier(&armor, rng) as u8,
slots: self.armor_stats.slots(map_area, rng) as u8,
})
},
RareDropItem::Shield(shield) => {
ItemDropType::Shield(Shield {
shield,
dfp: self.shield_stats.dfp_modifier(&shield, rng) as u8,
evp: self.shield_stats.evp_modifier(&shield, rng) as u8,
})
},
RareDropItem::Unit(unit) => {
ItemDropType::Unit(Unit {
unit,
modifier: None,
})
},
RareDropItem::Tool(tool) => {
ItemDropType::Tool(Tool {
tool,
})
},
RareDropItem::Mag(_mag) => {
ItemDropType::Mag(Mag::baby_mag(rng.gen_range(0, 18)))
}
}
}
pub fn get_drop<R: Rng>(&self, map_area: &MapArea, monster: &MonsterType, rng: &mut R) -> Option<ItemDropType> {
self.rates.get(monster)
.and_then(|drop_rates| {
drop_rates.iter()
.filter_map(|drop_rate| {
let rand: f32 = rng.gen();
if rand < drop_rate.rate {
Some(self.apply_item_stats(map_area, drop_rate.item, rng))
}
else {
None
}
}).next()
})
}
}
pub struct RareDropTableBuilder {
rates: Option<HashMap<MonsterType, Vec<RareDropRate>>>,
attribute_table: Option<AttributeTable>,
armor_stats: Option<GenericArmorTable>,
shield_stats: Option<GenericShieldTable>,
}
// TODO: add the rest of these later I just need these ones right now
impl RareDropTableBuilder {
pub fn rates(mut self, rates: HashMap<MonsterType, Vec<RareDropRate>>) -> RareDropTableBuilder {
self.rates = Some(rates);
self
}
#[must_use]
pub fn rate(mut self, monster_type: MonsterType, drop_rate: RareDropRate) -> RareDropTableBuilder {
match &mut self.rates {
Some(rates) => {
rates.entry(monster_type)
.or_insert(Vec::new())
.push(drop_rate);
},
None => {
let mut rates = HashMap::default();
rates.insert(monster_type, vec![drop_rate]);
self.rates = Some(rates);
}
}
self
}
pub fn build(self, episode: Episode, difficulty: Difficulty, section_id: SectionID) -> RareDropTable {
RareDropTable {
rates: self.rates.unwrap_or_else(|| load_default_monster_rates(episode, difficulty, section_id)),
attribute_table: self.attribute_table.unwrap_or_else(|| AttributeTable::new(episode, difficulty, section_id)),
armor_stats: self.armor_stats.unwrap_or_else(|| GenericArmorTable::new(episode, difficulty, section_id)),
shield_stats: self.shield_stats.unwrap_or_else(|| GenericShieldTable::new(episode, difficulty, section_id)),
}
}
}
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