fix(bot): parse nested openai responses payloads

apps/bot/src/openai-purchase-interpreter.test.ts

@@ -0,0 +1,98 @@
+import { describe, expect, test } from 'bun:test'
+
+import {
+  createOpenAiPurchaseInterpreter,
+  type PurchaseInterpretation
+} from './openai-purchase-interpreter'
+
+function successfulResponse(payload: unknown): Response {
+  return new Response(JSON.stringify(payload), {
+    status: 200,
+    headers: {
+      'content-type': 'application/json'
+    }
+  })
+}
+
+describe('createOpenAiPurchaseInterpreter', () => {
+  test('parses nested responses api content output', async () => {
+    const interpreter = createOpenAiPurchaseInterpreter('test-key', 'gpt-5-mini')
+    expect(interpreter).toBeDefined()
+
+    const originalFetch = globalThis.fetch
+    globalThis.fetch = (async () =>
+      successfulResponse({
+        output: [
+          {
+            content: [
+              {
+                text: JSON.stringify({
+                  decision: 'purchase',
+                  amountMinor: '100000',
+                  currency: 'GEL',
+                  itemDescription: 'армянская золотая швабра',
+                  confidence: 93,
+                  clarificationQuestion: null
+                })
+              }
+            ]
+          }
+        ]
+      })) as unknown as typeof fetch
+
+    try {
+      const result = await interpreter!('Купил швабру, Армянскую, золотую. 1000 лари', {
+        defaultCurrency: 'GEL'
+      })
+
+      expect(result).toEqual<PurchaseInterpretation>({
+        decision: 'purchase',
+        amountMinor: 100000n,
+        currency: 'GEL',
+        itemDescription: 'армянская золотая швабра',
+        confidence: 93,
+        parserMode: 'llm',
+        clarificationQuestion: null
+      })
+    } finally {
+      globalThis.fetch = originalFetch
+    }
+  })
+
+  test('parses fenced json responses', async () => {
+    const interpreter = createOpenAiPurchaseInterpreter('test-key', 'gpt-5-mini')
+    expect(interpreter).toBeDefined()
+
+    const originalFetch = globalThis.fetch
+    globalThis.fetch = (async () =>
+      successfulResponse({
+        output: [
+          {
+            content: [
+              {
+                text: '```json\n{"decision":"purchase","amountMinor":"1000","currency":"GEL","itemDescription":"сухари","confidence":88,"clarificationQuestion":null}\n```'
+              }
+            ]
+          }
+        ]
+      })) as unknown as typeof fetch
+
+    try {
+      const result = await interpreter!('Купил сухари на стол за 10 лари', {
+        defaultCurrency: 'GEL'
+      })
+
+      expect(result).toEqual<PurchaseInterpretation>({
+        decision: 'purchase',
+        amountMinor: 1000n,
+        currency: 'GEL',
+        itemDescription: 'сухари',
+        confidence: 88,
+        parserMode: 'llm',
+        clarificationQuestion: null
+      })
+    } finally {
+      globalThis.fetch = originalFetch
+    }
+  })
+})