flowchart TB
    %% ===== 主题定义 =====
    classDef client fill:#eff6ff,stroke:#3b82f6,stroke-width:3px,color:#1d4ed8,rx:14,ry:14
    classDef gateway fill:#fffbeb,stroke:#f59e0b,stroke-width:3px,color:#92400e,rx:12,ry:12
    classDef openai_adapter fill:#f8fafc,stroke:#0a9e7b,stroke-width:2px,color:#334155,rx:10,ry:10
    classDef anthropic_compat fill:#f8fafc,stroke:#d07354,stroke-width:2px,color:#334155,rx:10,ry:10
    classDef ds_core fill:#f8fafc,stroke:#3964fe,stroke-width:2px,color:#1e40af,rx:10,ry:10
    classDef external fill:#fef2f2,stroke:#ef4444,stroke-width:3px,color:#991b1b,rx:6,ry:6

    %% ===== 节点 =====
    Client(["🖥️ 客户端"]):::client

    subgraph GW ["🌐 HTTP 接入层"]
        Handler(["路由 / 鉴权 / 序列化"]):::gateway
    end

    subgraph PL ["⚙️ 协议处理层"]
        direction TB

        subgraph AC ["Anthropic 兼容层"]
            A2O["请求转换<br/>Anthropic → OpenAI"]:::anthropic_compat
            O2A["响应转换<br/>OpenAI → Anthropic"]:::anthropic_compat
        end

        subgraph OA ["OpenAI 适配层"]
            ReqPipe["请求管道<br/>校验 / 工具提取 / 提示词构建"]:::openai_adapter
            RespPipe["响应管道<br/>SSE 解析 / 格式转换 / 工具修复"]:::openai_adapter
        end
    end

    subgraph CL ["🔧 核心层 (ds_core)"]
        Pool["账号池轮转"]:::ds_core
        PoW["PoW 求解"]:::ds_core
        Session["会话编排<br/>创建销毁 / 历史上传"]:::ds_core
    end

    DeepSeek[("🔴 DeepSeek API")]:::external

    %% ===== 连接 =====
    Client -->|"HTTP 请求"| Handler

    Handler -->|"OpenAI 请求结构体"| ReqPipe
    Handler -->|"Anthropic 请求结构体"| A2O
    A2O -->|"OpenAI 请求结构体"| ReqPipe

    ReqPipe --> Pool
    Pool --> PoW
    PoW --> Session
    Session -->|"completion 端点"| DeepSeek

    Session -.->|"DeepSeek SSE数据流"| RespPipe
    RespPipe -.->|"OpenAI 响应结构体"| Handler
    RespPipe -.->|"OpenAI 响应结构体"| O2A
    O2A -.->|"Anthropic 响应结构体"| Handler

    %% ===== 子图样式 =====
    style GW fill:#fffbeb,stroke:#f59e0b,stroke-width:2px,stroke-dasharray: 5 5
    style PL fill:#fafafa,stroke:#94a3b8,stroke-width:2px
    style AC fill:#fdf0ec,stroke:#d07354,stroke-width:2px
    style OA fill:#e6f7f3,stroke:#0a9e7b,stroke-width:2px
    style CL fill:#eef2ff,stroke:#3964fe,stroke-width:2px,stroke-dasharray: 5 5

flowchart TB
    %% ===== 主题定义 =====
    classDef ds_core fill:#eef2ff,stroke:#3964fe,stroke-width:2.5px,color:#1e40af,rx:10,ry:10
    classDef openai_adapter fill:#e6f7f3,stroke:#0a9e7b,stroke-width:2.5px,color:#065f46,rx:10,ry:10
    classDef step fill:#fffbeb,stroke:#f59e0b,stroke-width:1.5px,color:#334155,rx:6,ry:6

    subgraph RQ ["请求处理"]
        direction TB
        Q1["ChatCompletionsRequest"]:::openai_adapter
        Q2["参数校验 + 默认值"]:::step
        Q3["工具/文件提取 + 注入提示词"]:::step
        Q4["DeepSeek 原生标签提示词构建"]:::step
        Q5["模型映射 + 能力开关"]:::step
        Q6["限流重试<br/>指数退避 1s→2s→4s→8s→16s"]:::step
        Q7["ChatRequest"]:::ds_core
    end

    subgraph RS1 ["非流式响应"]
        direction TB
        OR1["ds_core SSE 流"]:::ds_core
        OR2["SSE 帧解析<br/>ContentDelta / Usage"]:::step
        OR3["状态机重组<br/>合并连续文本 / 累积 usage"]:::step
        OR4["chunk 聚合<br/>拼接 content / reasoning / tool_calls"]:::step
        OR5["ChatCompletionsResponse"]:::openai_adapter
    end

    subgraph RS2 ["流式响应"]
        direction TB
        OS1["ds_core SSE 流"]:::ds_core
        OS2["SSE 帧解析 + 状态机"]:::step
        OS3["Chunk 转换<br/>DsFrame → ChatCompletionsResponseChunk"]:::step
        OS4["工具调用 XML 解析"]:::step
        OS5["异常工具调用自修复"]:::step
        OS6["stop 序列检测 + obfuscation"]:::step
        OS7["ChatCompletionsResponseChunk"]:::openai_adapter
    end

    Q1 --> Q2 --> Q3 --> Q4 --> Q5 --> Q6 --> Q7
    OR1 --> OR2 --> OR3 --> OR4 --> OR5
    OS1 --> OS2 --> OS3 --> OS4 --> OS5 --> OS6 --> OS7

    style RQ fill:#f8fafc,stroke:#0a9e7b,stroke-width:2px
    style RS1 fill:#f8fafc,stroke:#0a9e7b,stroke-width:2px
    style RS2 fill:#f8fafc,stroke:#0a9e7b,stroke-width:2px

flowchart TB
    %% ===== 主题定义 =====
    classDef oai fill:#e6f7f3,stroke:#0a9e7b,stroke-width:2.5px,color:#065f46,rx:10,ry:10
    classDef anth fill:#fdf0ec,stroke:#d07354,stroke-width:2.5px,color:#7c3a2a,rx:10,ry:10
    classDef step fill:#fffbeb,stroke:#f59e0b,stroke-width:1.5px,color:#334155,rx:6,ry:6

    subgraph RQ ["请求处理"]
        direction TB
        Q1["MessagesRequest"]:::anth
        Q2["消息展开<br/>System 前置 / 文本合并 / 图片/文档映射"]:::step
        Q3["工具映射<br/>ToolUnion → OpenAI Tool"]:::step
        Q4["能力开关映射<br/>thinking → reasoning_effort"]:::step
        Q5["ChatCompletionsRequest"]:::oai
    end

    subgraph RS3 ["非流式响应"]
        direction TB
        AR1["ChatCompletionsResponse"]:::oai
        AR2["Content 拆解<br/>reasoning → Thinking<br/>content → Text<br/>tool_calls → ToolUse"]:::step
        AR3["ID 映射<br/>chatcmpl → msg<br/>call → toolu"]:::step
        AR4["MessagesResponse"]:::anth
    end

    subgraph RS4 ["流式响应"]
        direction TB
        AS1["ChatCompletionsResponseChunk 流"]:::oai
        AS2["Chunk 状态机<br/>块类型切换 / 索引递进"]:::step
        AS3["事件映射<br/>content → text_delta<br/>reasoning → thinking_delta<br/>tool_calls → input_json_delta"]:::step
        AS4["MessagesResponseChunk"]:::anth
    end

    Q1 --> Q2 --> Q3 --> Q4 --> Q5
    AR1 --> AR2 --> AR3 --> AR4
    AS1 --> AS2 --> AS3 --> AS4

    style RQ fill:#f8fafc,stroke:#d07354,stroke-width:2px
    style RS3 fill:#f8fafc,stroke:#d07354,stroke-width:2px
    style RS4 fill:#f8fafc,stroke:#d07354,stroke-width:2px