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use crate::dice::roll_formula;
use crate::random_tables::RANDOM_TABLES;
use crate::rules::ability_scores::{AbilityScore, AbilityScoreCollection};
use crate::rules::classes::{Class, CLASSES};
use crate::rules::magic_items::{MagicItem, MAGIC_ITEMS};
use crate::rules::races::Race;
use log::debug;
use rand::Rng;
use std::collections::HashMap;
// use std::fmt;
pub struct Npc {
pub alignment: Option<String>,
pub race: Option<&'static Race>,
pub class: Option<&'static Class>,
pub ability_scores: Option<AbilityScoreCollection>,
pub persona: Option<String>,
pub magic_items: Vec<&'static MagicItem>,
}
impl Npc {
pub fn new(
alignment: Option<String>,
race: Option<&'static Race>,
class: Option<&'static Class>,
ability_scores: Option<AbilityScoreCollection>,
persona: Option<String>,
magic_items: Vec<&'static MagicItem>,
) -> Self {
Npc {
alignment,
race,
class,
ability_scores,
persona,
magic_items,
}
}
pub fn roll_henchman_ability_scores(&mut self) {
rand::thread_rng();
let mut ability_score_rolls: HashMap<AbilityScore, i32> = HashMap::new();
for &ability in &[
AbilityScore::Strength,
AbilityScore::Intelligence,
AbilityScore::Wisdom,
AbilityScore::Dexterity,
AbilityScore::Constitution,
AbilityScore::Charisma,
] {
debug!("Generating score for {}", &ability.abbr());
// Roll 3d6 down the line.
let mut roll_result = roll_formula("3d6").unwrap();
debug!("Rolled {}", roll_result.total());
let class_ref = self.class.unwrap();
let race_ref = self.race.unwrap();
// For ability scores which are prime requisites of the class,
// increase all dice by 1 which do not already show a 6.
if class_ref.prime_requisites.contains(&ability) {
roll_result.increase_sides_below_max(6, 1);
}
debug!("Bumped prime requisites, now at {}", roll_result.total());
// At this point we don't need the individual dice anymore.
let mut total = roll_result.total() as i32;
// Add NPC-specific class ability score modifiers.
total += class_ref
.npc_ability_score_modifiers
.get(&ability)
.copied()
.unwrap_or(0);
debug!("After adding NPC class modifiers, now at {}", total);
// Add racial ability score modifiers.
total += race_ref
.npc_ability_score_modifiers
.get(&ability)
.copied()
.unwrap_or(0);
debug!("After adding racial modifiers, now at {}", total);
// Ensure racial ability score limits are imposed.
// TODO: Use u8 for all of these, so no conversion from u32 will be needed.
let [min_score, max_score] = race_ref.ability_score_ranges.get(&ability).unwrap().male;
total = total.max(min_score as i32);
total = total.min(max_score as i32);
ability_score_rolls.insert(ability, total);
}
// Create an AbilityScoreCollection for the Npc, using the above results.
let mut score_collection = AbilityScoreCollection::new();
for (ability, value) in &ability_score_rolls {
score_collection.add_score(*ability, *value);
}
self.ability_scores = Some(score_collection);
// TODO: Verify legality of class based on alignment.
// TODO: Verify legality of class based on race.
// TODO: Verify legality of class based on ability scores.
}
pub fn randomize_persona(&mut self) {
let appearance = RANDOM_TABLES
.roll_table("npc_general_appearance")
.to_string();
let tendencies = RANDOM_TABLES
.roll_table("npc_general_tendencies")
.to_string();
let personality = RANDOM_TABLES.roll_table("npc_personality").to_string();
let disposition = RANDOM_TABLES.roll_table("npc_disposition").to_string();
let components = vec![appearance, tendencies, personality, disposition];
self.persona = Some(components.join(", "));
}
// This uses the Appendix C method provided in the city/town section.
// I prefer it to the Monster Manual method and the NPC party method
// because it provides more variance.
// TODO: Support other levels than 1st.
pub fn add_random_magic_items(&mut self) {
let mut rng = rand::thread_rng();
let class_ref = self.class.unwrap();
// "Protection" isn't a real magic item kind, it's only used for this,
// which is why we don't just use MagicItemKind. Can improve this later.
let kind_strings_for_chances = [
"sword",
"potion",
"scroll",
"ring",
"rod_staff_wand",
"misc",
"armor_shield",
"protection",
];
for &kind_string in kind_strings_for_chances.iter() {
if class_ref
.chances_for_magic
.get(kind_string)
.copied()
.unwrap_or(0)
<= rng.gen_range(1..=100)
{
self.magic_items.push(
MAGIC_ITEMS
.get(kind_string)
.expect("Failed to load magic item"),
);
}
}
}
// TODO: Probably break this out later like this.
// fn increase_prime_requisites(&mut self, roll_result: &mut RollResult) {
// let class_ref = self.class.unwrap();
//
// // For ability scores which are prime requisites of the class,
// // increase all dice by 1 which do not already show a 6.
// if class_ref.prime_requisites.contains(&ability) {
// roll_result.increase_sides_below_max(6, 1);
// }
// roll_result.increase_sides_below_max(6, 1);
// }
}
// impl fmt::Display for Npc {
// fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
// let values: Vec<&str> = vec![
// self.alignment.as_deref().unwrap_or(""),
// self.race.as_deref().unwrap_or(""),
// self.class.as_ref().map_or("", |class| &class.name),
// ]
// .into_iter()
// .filter(|&s| !s.is_empty())
// .collect();
//
// let formatted_string = values.join(" ");
// write!(f, "{}", formatted_string)
// }
// }
#[cfg(test)]
mod tests {
use super::*;
use crate::rules::classes::CLASSES;
use crate::rules::races::RACES;
#[test]
#[ignore]
#[should_panic(expected = "Ability score generation isn't testable yet.")]
fn test_roll_henchman_ability_scores() {
let class_ref = CLASSES.get("fighter").unwrap();
let race_ref = RACES.get("dwarf").unwrap();
let mut npc = Npc {
alignment: Some(String::from("Lawful Good")),
race: Some(race_ref),
class: Some(class_ref),
ability_scores: None,
persona: None,
magic_items: Vec::new(),
};
// Roll ability scores for the Npc.
npc.roll_henchman_ability_scores();
// TODO: Need to actually test this process.
// Check if ability scores are modified correctly based on class requirements and modifiers.
// let ability_scores = npc.ability_scores.unwrap();
}
}
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