Updates Test scene.

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+    - target: {fileID: 3228149243574310962, guid: 004ea84725223334994cf72d2115c180, type: 3}
-  serializedVersion: 2
+      propertyPath: m_LocalRotation.y
-  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+      value: 0
-  m_LocalPosition: {x: 0, y: 0, z: 0}
+      objectReference: {fileID: 0}
-  m_LocalScale: {x: 1, y: 1, z: 1}
+    - target: {fileID: 3228149243574310962, guid: 004ea84725223334994cf72d2115c180, type: 3}
-  m_ConstrainProportionsScale: 0
+      propertyPath: m_LocalRotation.z
-  m_Children: []
+      value: 0
-  m_Father: {fileID: 1044611067}
+      objectReference: {fileID: 0}
-  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+    - target: {fileID: 3228149243574310962, guid: 004ea84725223334994cf72d2115c180, type: 3}
---- !u!114 &1912693323
+      propertyPath: m_LocalEulerAnglesHint.x
-MonoBehaviour:
+      value: 0
-  m_ObjectHideFlags: 0
+      objectReference: {fileID: 0}
-  m_CorrespondingSourceObject: {fileID: 0}
+    - target: {fileID: 3228149243574310962, guid: 004ea84725223334994cf72d2115c180, type: 3}
-  m_PrefabInstance: {fileID: 0}
+      propertyPath: m_LocalEulerAnglesHint.y
-  m_PrefabAsset: {fileID: 0}
+      value: 0
-  m_GameObject: {fileID: 1912693321}
+      objectReference: {fileID: 0}
-  m_Enabled: 1
+    - target: {fileID: 3228149243574310962, guid: 004ea84725223334994cf72d2115c180, type: 3}
-  m_EditorHideFlags: 0
+      propertyPath: m_LocalEulerAnglesHint.z
-  m_Script: {fileID: 11500000, guid: 6df1f7169d6eca04abd7db0f712639ff, type: 3}
+      value: 0
-  m_Name: 
+      objectReference: {fileID: 0}
-  m_EditorClassIdentifier: PpgiaX540P3::PPGIA.X540.Project3.ApiClient
+    - target: {fileID: 4693018637014637836, guid: 004ea84725223334994cf72d2115c180, type: 3}
-  _apiBaseUrl: https://gyzypaneqa.execute-api.us-east-1.amazonaws.com/api/
+      propertyPath: _query
-  _sessionInitEndpoint: /session/init
+      value: 'Bom dia, guru! '
-  _sessionCloseEndpoint: /session/close
+      objectReference: {fileID: 0}
-  _llmAgentEndpoint: /agent/ask
+    - target: {fileID: 4693018637014637836, guid: 004ea84725223334994cf72d2115c180, type: 3}
-  _ttsEndpoint: /tts/synthesize
+      propertyPath: _session.created_at
-  _sttEndpoint: /stt/upload
+      value: 1763908462
-  _clientId: unity-client
+      objectReference: {fileID: 0}
-  _timeoutInSeconds: 10
+    - target: {fileID: 4693018637014637836, guid: 004ea84725223334994cf72d2115c180, type: 3}
-  _query: 
+      propertyPath: _session.session_id
-  _session:
+      value: 9686ca2a-302a-4ac8-8709-a98067d37530
-    session_id: ddcc99fb-0474-4968-9b0c-ae13c56dfba6
+      objectReference: {fileID: 0}
-    created_at: 1763819290
+    m_RemovedComponents: []
+    m_RemovedGameObjects: []
+    m_AddedGameObjects: []
+    m_AddedComponents: []
+  m_SourcePrefab: {fileID: 100100000, guid: 004ea84725223334994cf72d2115c180, type: 3}
 --- !u!1660057539 &9223372036854775807
 SceneRoots:
   m_ObjectHideFlags: 0
@@ -672,4 +512,4 @@ SceneRoots:
   - {fileID: 330585546}
   - {fileID: 410087041}
   - {fileID: 832575519}
-  - {fileID: 1044611067}
+  - {fileID: 7579352147520404884}

Assets/_Client/Scenes/Main.unity.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 99c9720ab356a0642a771bea13969a05
+guid: 2970b36c4604a124a9fb330c622eb61c
 DefaultImporter:
   externalObjects: {}
   userData: 

Assets/_Client/Scripts/ApiClient.cs

@@ -117,51 +117,36 @@ Response Body: {body}";
                 url, "DELETE", null, timeoutInSeconds, callbackOnSuccess);
         }
 
-        internal static IEnumerator ReadAudioResponseCoroutine(
+        internal static IEnumerator DownloadAudioCoroutine(
-            UnityWebRequest request,
+            string url,
+            float timeoutInSeconds,
             Action<AudioClip> callbackOnSuccess)
         {
-            byte[] audioBytes = request.downloadHandler.data;
+            using (UnityWebRequest mmRequest =
-            if (audioBytes == null || audioBytes.Length == 0)
+                    UnityWebRequestMultimedia.GetAudioClip(url, AudioType.OGGVORBIS))
             {
-                Debug.LogError("No audio data received.");
-                yield break;
-            }
 
-            // Save temporarily to file for loading as AudioClip
+                var op = mmRequest.SendWebRequest();
-            string tempPath = Path.Combine(Application.persistentDataPath, "tts_temp.ogg");
+                yield return WaitForTimeout(op, timeoutInSeconds, () =>
-            File.WriteAllBytes(tempPath, audioBytes);
-
-            using (var file = UnityWebRequestMultimedia.GetAudioClip(
-                "file://" + tempPath, AudioType.OGGVORBIS))
-            {
-                yield return file.SendWebRequest();
-
-                if (file.result == UnityWebRequest.Result.Success)
                 {
-                    AudioClip clip = DownloadHandlerAudioClip.GetContent(file);
+                    Debug.LogError("Request timed out.");
-                    callbackOnSuccess?.Invoke(clip);
+                });
-                }
-                else
-                {
-                    Debug.LogError($"Error loading AudioClip: {file.error}");
-                }
-            }
 
-            // Remove temporary file
+                if (mmRequest.result != UnityWebRequest.Result.Success)
-            File.Delete(tempPath);
+                {
+                    Debug.LogError($"Error loading audio: {mmRequest.error}");
+                    yield break;
+                }
+
+                AudioClip clip = DownloadHandlerAudioClip.GetContent(mmRequest);
+                if (clip == null)
+                {
+                    Debug.LogError("AudioClip is null after download.");
+                    yield break;
+                }
+
+                callbackOnSuccess?.Invoke(clip);
+            }
         }
     }
-
-    internal enum Environment
-    {
-        Development,
-        Production
-    }
-
-    [Serializable]
-    internal struct ChatServicePayload
-    {
-        public string message;
-    }
 }

Assets/_Client/Scripts/ApiClientManager.cs

@@ -90,6 +90,8 @@ namespace PPGIA.X540.Project3.API
         [ContextMenu("Initiate Session")]
         public void InitiateSession()
         {
+            StopAllCoroutines();
+
             var url = EndpointUrl(_sessionInitEndpoint, _clientId);
 
             StartCoroutine(ApiClient.CallEndpointWithPostCoroutine(
@@ -110,6 +112,8 @@ namespace PPGIA.X540.Project3.API
                 return;
             }
 
+            StopAllCoroutines();
+
             var url = EndpointUrl(_sessionCloseEndpoint, _session.SessionId);
 
             StartCoroutine(ApiClient.CallEndpointWithDeleteCoroutine(
@@ -130,6 +134,8 @@ namespace PPGIA.X540.Project3.API
                 return;
             }
 
+            StopAllCoroutines();
+
             // Build the endpoint URL and payload
             var url = EndpointUrl(_chatEndpoint, _session.SessionId);
             var payload = new ChatServicePayload { message = _query };
@@ -138,8 +144,18 @@ namespace PPGIA.X540.Project3.API
             StartCoroutine(ApiClient.CallEndpointWithPostCoroutine(
                 url, _timeoutInSeconds, payload, (request) =>
             {
-                StartCoroutine(ApiClient.ReadAudioResponseCoroutine(
+                var body = request.downloadHandler?.text ?? string.Empty;
-                    request, (audioClip) =>
+                var response = ApiModel.FromJson<ChatServiceResponse>(body);
+                var audioUrl = response?.AudioUrl;
+                if (string.IsNullOrEmpty(audioUrl))
+                {
+                    Debug.LogWarning("No audio URL in response.");
+                    return;
+                }
+                
+                Debug.Log($"Downloading audio from: {audioUrl}");
+                StartCoroutine(ApiClient.DownloadAudioCoroutine(
+                    audioUrl, _timeoutInSeconds, (audioClip) =>
                 {
                     if (audioClip == null)
                     {

Assets/_Client/Scripts/ApiModel.cs

@@ -0,0 +1,56 @@
+using System; 
+
+using UnityEngine;
+
+
+namespace PPGIA.X540.Project3.API
+{
+    [Serializable]
+    public class ApiModel
+    {
+        public static T FromJson<T>(string json) =>
+            JsonUtility.FromJson<T>(json);
+
+        public static string ToJson<T>(T obj) =>
+            JsonUtility.ToJson(obj);
+    }
+
+    [Serializable]
+    public class Session: ApiModel
+    {
+        public string session_id;
+        public string created_at;
+
+        // Optional convenience properties with C#-style names:
+        public string SessionId => session_id;
+        public DateTime CreatedAt => DateTime.Parse(created_at);
+    }
+
+    [Serializable]
+    public class ChatServicePayload : ApiModel
+    {
+        public string message;
+    }
+
+    public class ChatServiceResponse : ApiModel
+    {
+        public string session_id;
+        public string message;
+        public string audio_url;
+        public string audio_key;
+        public int expires_in;
+
+        // Optional convenience properties with C#-style names:
+        public string SessionId => session_id;
+        public string Message => message;
+        public string AudioUrl => audio_url;
+        public string AudioKey => audio_key;
+        public int ExpiresIn => expires_in;
+    }
+
+    internal enum Environment
+    {
+        Development,
+        Production
+    }
+}

Assets/_Client/Scripts/Types/Session.cs

@@ -1,21 +0,0 @@
-using System; 
-
-using UnityEngine;
-
-
-namespace PPGIA.X540.Project3.API
-{
-    [Serializable]
-    public class Session
-    {
-        public string session_id;
-        public string created_at;
-
-        // Optional convenience properties with C#-style names:
-        public string SessionId => session_id;
-        public DateTime CreatedAt => DateTime.Parse(created_at);
-
-        public static Session FromJson(string json) =>
-            JsonUtility.FromJson<Session>(json);
-    }
-}