初始提交

2026-08-26 18:06:02 +08:00
commit 5544788917
53 changed files with 4101 additions and 0 deletions
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+using System.ClientModel;
+using Azure.AI.OpenAI;
+using Microsoft.Agents.AI;
+using Microsoft.Extensions.AI;
+using Microsoft.Extensions.Configuration;
+using OpenAI;
+using OpenAI.Chat;
+
+namespace MAF1.Utils;
+
+public sealed class AgentFactory
+{
+    private readonly ChatClient _chatClient;
+
+    public AgentFactory(LlmOptions options)
+    {
+        if (string.IsNullOrWhiteSpace(options.ApiKey))
+        {
+            throw new InvalidOperationException(
+                """
+                还没有配置模型。请在 appsettings.json 的 Llm 节点，或环境变量中设置：
+                  OPENAI_API_KEY / Llm:ApiKey
+                  OPENAI_ENDPOINT / Llm:Endpoint
+                  OPENAI_CHAT_MODEL / Llm:Model
+                """);
+        }
+
+        string model = string.IsNullOrWhiteSpace(options.Model)
+            ? DefaultModelFor(options.Endpoint)
+            : options.Model;
+
+        if (LooksLikeAzureOpenAI(options.Endpoint))
+        {
+            Console.Error.WriteLine($"使用 Azure OpenAI: {options.Endpoint}  部署: {model}");
+            _chatClient = new AzureOpenAIClient(new Uri(options.Endpoint), new ApiKeyCredential(options.ApiKey))
+                .GetChatClient(model);
+            return;
+        }
+
+        OpenAIClientOptions clientOptions = new();
+        if (!string.IsNullOrWhiteSpace(options.Endpoint))
+        {
+            clientOptions.Endpoint = ToOpenAICompatibleEndpoint(options.Endpoint);
+        }
+
+        Console.Error.WriteLine($"使用 OpenAI 兼容接口: {clientOptions.Endpoint?.ToString() ?? "https://api.openai.com/v1"}  模型: {model}");
+        _chatClient = new OpenAIClient(new ApiKeyCredential(options.ApiKey), clientOptions)
+            .GetChatClient(model);
+    }
+
+    public AIAgent CreateAgent(string name, string instructions, IList<AITool>? tools = null)
+    {
+        return _chatClient.AsAIAgent(instructions: instructions, name: name, tools: tools);
+    }
+
+    public static LlmOptions Load(IConfiguration config)
+    {
+        LlmOptions options = config.GetSection("Llm").Get<LlmOptions>() ?? new LlmOptions();
+        options.ApiKey = FirstNonEmpty(options.ApiKey, Env("OPENAI_API_KEY"), Env("AZURE_OPENAI_API_KEY"));
+        options.Endpoint = FirstNonEmpty(options.Endpoint, Env("OPENAI_ENDPOINT"), Env("OPENAI_BASE_URL"), Env("AZURE_OPENAI_ENDPOINT"));
+        options.Model = FirstNonEmpty(options.Model, Env("OPENAI_CHAT_MODEL"), Env("AZURE_OPENAI_DEPLOYMENT_NAME"));
+        return options;
+    }
+
+    private static string DefaultModelFor(string? endpoint)
+    {
+        if (!string.IsNullOrWhiteSpace(endpoint) && endpoint.Contains("deepseek", StringComparison.OrdinalIgnoreCase))
+        {
+            return "deepseek-chat";
+        }
+
+        return "gpt-4o-mini";
+    }
+
+    private static bool LooksLikeAzureOpenAI(string? endpoint)
+    {
+        if (string.IsNullOrWhiteSpace(endpoint) || !Uri.TryCreate(endpoint, UriKind.Absolute, out Uri? uri))
+        {
+            return false;
+        }
+
+        string host = uri.Host;
+        return host.Contains("openai.azure.com", StringComparison.OrdinalIgnoreCase)
+            || host.Contains("cognitiveservices.azure.com", StringComparison.OrdinalIgnoreCase)
+            || host.Contains("services.ai.azure.com", StringComparison.OrdinalIgnoreCase);
+    }
+
+    private static Uri ToOpenAICompatibleEndpoint(string endpoint)
+    {
+        string trimmed = endpoint.TrimEnd('/');
+        if (!trimmed.EndsWith("/v1", StringComparison.OrdinalIgnoreCase))
+        {
+            trimmed += "/v1";
+        }
+
+        return new Uri(trimmed);
+    }
+
+    private static string? Env(string name) => Environment.GetEnvironmentVariable(name);
+
+    private static string FirstNonEmpty(params string?[] values)
+    {
+        foreach (string? value in values)
+        {
+            if (!string.IsNullOrWhiteSpace(value))
+            {
+                return value;
+            }
+        }
+
+        return "";
+    }
+}