From 38a653ebed3a66dcf88e3c72c1b78e99763998a2 Mon Sep 17 00:00:00 2001
From: Luzefiru <ian.deejay.iv@gmail.com>
Date: Mon, 9 Sep 2024 15:59:32 +0800
Subject: [PATCH] feat(items): add recipes

---
 items/item-recipes.ts | 62 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 items/item-recipes.ts

diff --git a/items/item-recipes.ts b/items/item-recipes.ts
new file mode 100644
index 00000000..510982a3
--- /dev/null
+++ b/items/item-recipes.ts
@@ -0,0 +1,62 @@
+import { Consume } from "@/features/inventory/types/Consume";
+
+export type ItemRecipe = {
+  id: number;
+  consume: Consume[];
+};
+
+const FORGERY_PARENT_IDS = [43020014, 43020024, 43020034, 43020044, 43020054];
+const MOB_PARENT_IDS = [41100014, 41100024, 41100034, 41200034];
+
+const PARENT_IDS: number[] = [...MOB_PARENT_IDS, ...FORGERY_PARENT_IDS];
+
+export const itemRecipes: ItemRecipe[] = PARENT_IDS.flatMap((parentId) =>
+  generateRecipes(parentId, 3),
+);
+
+/**
+ * Recursively generates a sequence of item recipes starting from a tier 5 parent item
+ * and continues until the recipe for a tier `(5 - levels)` item is reached.
+ *
+ * Each item at tier `n` consumes 3 of the item from tier `n-1`, following a sequential ID pattern.
+ *
+ * For example, if the starting ID represents a tier 5 item (e.g., ID 105), it will generate recipes
+ * for items down to tier 5 - levels (e.g., 104, 103, etc.) until the number of levels is exhausted.
+ *
+ * Assumptions:
+ * - The IDs are ordered sequentially. For example, an item with ID `105` at tier 5 consumes an item with ID `104` (tier 4),
+ *   and the pattern continues.
+ * - The `consume` value is fixed at `3` for all recipes.
+ *
+ * @param id - The ID of the tier 5 parent item (the highest tier in the sequence).
+ * @param levels - The number of levels to generate recipes for. The function will stop at the `5 - levels` tier item.
+ *                 If `levels` is 0, no recipes are generated.
+ * @returns An array of `ItemRecipe` objects representing the recipes for each tier down to `5 - levels`.
+ *
+ * Example:
+ * Calling `generateRecipes(105, 3)` will generate the following recipes:
+ *   - { id: 105, consume: [{ id: 104, value: 3 }] }
+ *   - { id: 104, consume: [{ id: 103, value: 3 }] }
+ *   - { id: 103, consume: [{ id: 102, value: 3 }] }
+ */
+function generateRecipes(id: number, levels: number): ItemRecipe[] {
+  if (levels === 0) return [];
+
+  return [
+    {
+      id: id,
+      consume: [
+        {
+          id: id - 1, // always decrements the id by 1 for the prerequisite items
+          value: 3, // always consumes 3
+        },
+      ],
+    },
+    ...generateRecipes(id - 1, levels - 1),
+  ];
+}
+
+export function getItemRecipe(id: number): ItemRecipe | null {
+  const recipe = itemRecipes.find((recipe) => recipe.id === id);
+  return recipe || null; // Return null if no recipe is found
+}