From db8b9baf3f3887ba2a37cc4f6df867584f0755f0 Mon Sep 17 00:00:00 2001
From: David Gay <eapoems@riseup.net>
Date: Mon, 22 Jan 2024 02:49:10 -0500
Subject: Simple magic item generation for 1st level NPCs

---
 src/data/rules/magic_items.yaml | 41 ++++++++++++++++++++++++++++++++++++
 src/main.rs                     |  1 +
 src/rules/classes.rs            |  2 +-
 src/rules/npcs.rs               | 46 ++++++++++++++++++++++++++++++++++++++++-
 4 files changed, 88 insertions(+), 2 deletions(-)

diff --git a/src/data/rules/magic_items.yaml b/src/data/rules/magic_items.yaml
index c474cf0..3108e7c 100644
--- a/src/data/rules/magic_items.yaml
+++ b/src/data/rules/magic_items.yaml
@@ -1,3 +1,44 @@
+#####
+# Dummy data, so we can at least generate kinds prior to having all magic items
+# implemented.
+#####
+
+potion:
+  name: "Potion"
+  kind: potion
+
+scroll:
+  name: "Scroll"
+  kind: scroll
+
+ring:
+  name: "Ring"
+  kind: ring
+
+rod_staff_wand:
+  name: "Rod/Staff/Wand"
+  kind: rod_staff_wand
+
+misc:
+  name: "Misc"
+  kind: misc
+
+armor_shield:
+  name: "Armor/Shield"
+  kind: armor_shield
+
+sword:
+  name: "Sword"
+  kind: sword
+
+protection:
+  name: "Protection"
+  kind: ring # Not actually, but this is fine for now.
+
+#####
+# Remainder of file is actual data.
+#####
+
 sword_plus_one:
   name: "Sword +1"
   kind: sword
diff --git a/src/main.rs b/src/main.rs
index 4b2d91e..bc9e200 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -40,6 +40,7 @@ fn main() {
                         Some(class_ref),
                         None,
                         None,
+                        Vec::new(),
                     );
 
                     npc.roll_henchman_ability_scores();
diff --git a/src/rules/classes.rs b/src/rules/classes.rs
index d933bc1..1e4c24d 100644
--- a/src/rules/classes.rs
+++ b/src/rules/classes.rs
@@ -12,7 +12,7 @@ pub struct Class {
     pub prime_requisites: Vec<AbilityScore>,
     #[serde(default)]
     pub npc_ability_score_modifiers: HashMap<AbilityScore, i32>,
-    pub chances_for_magic: Vec<i32>,
+    pub chances_for_magic: HashMap<String, i32>,
 }
 
 lazy_static! {
diff --git a/src/rules/npcs.rs b/src/rules/npcs.rs
index ccf9936..ab111de 100644
--- a/src/rules/npcs.rs
+++ b/src/rules/npcs.rs
@@ -1,9 +1,11 @@
 use crate::dice::roll_formula;
 use crate::random_tables::RANDOM_TABLES;
 use crate::rules::ability_scores::{AbilityScore, AbilityScoreCollection};
-use crate::rules::classes::Class;
+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;
 
@@ -13,6 +15,7 @@ pub struct Npc {
     pub class: Option<&'static Class>,
     pub ability_scores: Option<AbilityScoreCollection>,
     pub persona: Option<String>,
+    pub magic_items: Vec<&'static MagicItem>,
 }
 
 impl Npc {
@@ -22,6 +25,7 @@ impl Npc {
         class: Option<&'static Class>,
         ability_scores: Option<AbilityScoreCollection>,
         persona: Option<String>,
+        magic_items: Vec<&'static MagicItem>,
     ) -> Self {
         Npc {
             alignment,
@@ -29,6 +33,7 @@ impl Npc {
             class,
             ability_scores,
             persona,
+            magic_items,
         }
     }
 
@@ -112,6 +117,44 @@ impl Npc {
         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();
@@ -159,6 +202,7 @@ mod tests {
             class: Some(class_ref),
             ability_scores: None,
             persona: None,
+            magic_items: Vec::new(),
         };
 
         // Roll ability scores for the Npc.
-- 
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