From e2a44bec7d2258afd940705d2c01196e08805368 Mon Sep 17 00:00:00 2001
From: ginnoir <ginnoir@users.noreply.github.com>
Date: Fri, 12 Jun 2026 00:47:19 -0500
Subject: [PATCH] feat(engine): automation recipe export and import

---
 src/engine/__tests__/recipe.test.ts | 75 +++++++++++++++++++++++++++
 src/engine/recipe.ts                | 79 +++++++++++++++++++++++++++++
 2 files changed, 154 insertions(+)
 create mode 100644 src/engine/__tests__/recipe.test.ts
 create mode 100644 src/engine/recipe.ts

diff --git a/src/engine/__tests__/recipe.test.ts b/src/engine/__tests__/recipe.test.ts
new file mode 100644
index 0000000..3bbb264
--- /dev/null
+++ b/src/engine/__tests__/recipe.test.ts
@@ -0,0 +1,75 @@
+import { describe, expect, it } from 'vitest';
+import { buildContent } from '../../content/schema';
+import { createGameState } from '../game';
+import { exportRecipe, importRecipe, RECIPE_HEADER_V1 } from '../recipe';
+
+const DEFAULT_GROUP = { id: 'camp', label: 'Camp' };
+
+function recipeContent() {
+  return buildContent({
+    resources: [{ id: 'supplies', name: 'Supplies' }],
+    actions: [
+      {
+        id: 'gather_supplies',
+        name: 'Gather',
+        kind: 'timed',
+        group: DEFAULT_GROUP,
+        durationMs: 1000,
+        yields: [{ resourceId: 'supplies', amount: 1 }],
+      },
+      {
+        id: 'rest',
+        name: 'Rest',
+        kind: 'loop',
+        group: DEFAULT_GROUP,
+        durationMs: 1000,
+        yields: [{ resourceId: 'supplies', amount: 1 }],
+      },
+    ],
+  });
+}
+
+describe('recipe export/import', () => {
+  it('round-trips multi-line format', () => {
+    const content = recipeContent();
+    const state = createGameState(content);
+    state.manualCompletionCounts = { gather_supplies: 1, rest: 1 };
+    state.automationQueue = ['gather_supplies', 'rest'];
+
+    const text = exportRecipe(state, content, { name: 'Camp loop' });
+
+    expect(text).toContain(RECIPE_HEADER_V1);
+    expect(text).toContain('gather_supplies');
+
+    const fresh = createGameState(content);
+    fresh.manualCompletionCounts = { gather_supplies: 1, rest: 1 };
+    importRecipe(fresh, content, text);
+
+    expect(fresh.automationQueue).toEqual(['gather_supplies', 'rest']);
+  });
+
+  it('rejects unknown action ids', () => {
+    const content = recipeContent();
+    const state = createGameState(content);
+
+    expect(() => importRecipe(state, content, `${RECIPE_HEADER_V1}\nnot_real`)).toThrow(/unknown/i);
+  });
+
+  it('rejects locked action ids', () => {
+    const content = recipeContent();
+    const state = createGameState(content);
+    const text = `${RECIPE_HEADER_V1}\ngather_supplies`;
+
+    expect(() => importRecipe(state, content, text)).toThrow(/locked/i);
+  });
+
+  it('parses single-line alias', () => {
+    const content = recipeContent();
+    const state = createGameState(content);
+    state.manualCompletionCounts.gather_supplies = 1;
+
+    importRecipe(state, content, `${RECIPE_HEADER_V1}:gather_supplies`);
+
+    expect(state.automationQueue).toEqual(['gather_supplies']);
+  });
+});
diff --git a/src/engine/recipe.ts b/src/engine/recipe.ts
new file mode 100644
index 0000000..5fbdeb6
--- /dev/null
+++ b/src/engine/recipe.ts
@@ -0,0 +1,79 @@
+import type { Content } from '../content/schema';
+import { addToAutomationQueue, clearAutomationQueue, isAutomationUnlocked } from './automation';
+import type { GameState } from './game';
+
+export const RECIPE_HEADER_V1 = 'idlegame-recipe/v1';
+
+const ACTION_ID_RE = /^[a-z][a-z0-9_]*$/;
+
+export interface RecipeMeta {
+  name?: string;
+}
+
+export function exportRecipe(state: GameState, content: Content, meta?: RecipeMeta): string {
+  const lines = [RECIPE_HEADER_V1];
+  if (meta?.name) lines.push(`# name: ${meta.name}`);
+
+  for (const actionId of state.automationQueue) {
+    if (content.actionsById[actionId]) {
+      lines.push(actionId);
+    }
+  }
+
+  return lines.join('\n');
+}
+
+export function parseRecipeLines(text: string): { name?: string; actionIds: string[] } {
+  const trimmed = text.trim();
+  if (trimmed.startsWith(`${RECIPE_HEADER_V1}:`)) {
+    const actionIds = trimmed
+      .slice(RECIPE_HEADER_V1.length + 1)
+      .split(',')
+      .map((s) => s.trim())
+      .filter(Boolean);
+    return { actionIds };
+  }
+
+  const lines = trimmed.split(/\r?\n/);
+  if (lines[0]?.trim() !== RECIPE_HEADER_V1) {
+    throw new Error(`Invalid recipe header; expected "${RECIPE_HEADER_V1}"`);
+  }
+
+  let name: string | undefined;
+  const actionIds: string[] = [];
+  for (let i = 1; i < lines.length; i += 1) {
+    const line = lines[i]?.trim() ?? '';
+    if (!line) continue;
+    if (line.startsWith('# name:')) {
+      name = line.slice('# name:'.length).trim();
+      continue;
+    }
+    if (line.startsWith('#')) continue;
+    if (!ACTION_ID_RE.test(line)) {
+      throw new Error(`Invalid action id "${line}"`);
+    }
+    actionIds.push(line);
+  }
+
+  return { name, actionIds };
+}
+
+export function importRecipe(state: GameState, content: Content, text: string): { name?: string } {
+  const { name, actionIds } = parseRecipeLines(text);
+  const unknown = actionIds.filter((id) => !content.actionsById[id]);
+  if (unknown.length > 0) {
+    throw new Error(`Unknown action ids: ${unknown.join(', ')}`);
+  }
+
+  const locked = actionIds.filter((id) => !isAutomationUnlocked(state, content, id));
+  if (locked.length > 0) {
+    throw new Error(`Automation locked for: ${locked.join(', ')}`);
+  }
+
+  clearAutomationQueue(state);
+  for (const actionId of actionIds) {
+    addToAutomationQueue(state, content, actionId);
+  }
+
+  return { name };
+}