use super::types::*;
use super::utils;
use crate::error::{Result, SofosError};
use futures::stream::StreamExt;
use reqwest::header::{HeaderMap, HeaderValue};
use std::sync::Arc;
use std::sync::atomic::{AtomicBool, Ordering};
const API_BASE: &str = "https://api.anthropic.com/v1";
const API_VERSION: &str = "2023-06-01";
const ANTHROPIC_BETA: &str = "token-efficient-tools-2025-02-19";
#[derive(Clone)]
pub struct AnthropicClient {
client: reqwest::Client,
}
impl AnthropicClient {
pub fn new(api_key: String) -> Result<Self> {
let mut headers = HeaderMap::new();
headers.insert(
"x-api-key",
HeaderValue::from_str(&api_key)
.map_err(|e| SofosError::Config(format!("Invalid API key format: {}", e)))?,
);
headers.insert("anthropic-version", HeaderValue::from_static(API_VERSION));
headers.insert("anthropic-beta", HeaderValue::from_static(ANTHROPIC_BETA));
let client = utils::build_http_client(headers)?;
Ok(Self { client })
}
pub async fn check_connectivity(&self) -> Result<()> {
utils::check_api_connectivity(
&self.client,
API_BASE,
"Anthropic",
"https://status.anthropic.com",
)
.await
}
fn prepare_request(mut request: CreateMessageRequest) -> CreateMessageRequest {
request.messages = sanitize_messages_for_anthropic(request.messages);
if let Some(tools) = request.tools.take() {
let filtered: Vec<Tool> = tools
.into_iter()
.filter(|t| !matches!(t, Tool::OpenAIWebSearch { tool_type: _ }))
.collect();
if !filtered.is_empty() {
request.tools = Some(filtered);
}
}
request
}
pub async fn create_anthropic_message(
&self,
request: CreateMessageRequest,
) -> Result<CreateMessageResponse> {
let url = format!("{}/messages", API_BASE);
let request = Self::prepare_request(request);
let client = self.client.clone();
let response = utils::with_retries("Anthropic", || {
let client = client.clone();
let url = url.clone();
let request = request.clone();
async move { client.post(&url).json(&request).send().await }
})
.await?;
let response = utils::check_response_status(response).await?;
let result = response.json::<CreateMessageResponse>().await?;
Ok(result)
}
pub async fn create_message_streaming<FText, FThink>(
&self,
request: CreateMessageRequest,
on_text_delta: FText,
on_thinking_delta: FThink,
interrupt_flag: Arc<AtomicBool>,
) -> Result<CreateMessageResponse>
where
FText: Fn(&str) + Send + Sync,
FThink: Fn(&str) + Send + Sync,
{
let mut request = Self::prepare_request(request);
request.stream = Some(true);
let url = format!("{}/messages", API_BASE);
let client = self.client.clone();
let response = utils::with_retries("Anthropic", || {
let client = client.clone();
let url = url.clone();
let request = request.clone();
async move {
client
.post(&url)
.json(&request)
.timeout(utils::STREAMING_REQUEST_TIMEOUT)
.send()
.await
}
})
.await?;
let response = utils::check_response_status(response).await?;
let mut byte_stream = response.bytes_stream();
let mut buffer = String::new();
let mut message_id = String::new();
let mut model_name = String::new();
let mut content_blocks: Vec<ContentBlock> = Vec::new();
let mut input_tokens: u32 = 0;
let mut output_tokens: u32 = 0;
let mut stop_reason: Option<String> = None;
let mut current_block_type: Option<String> = None;
let mut current_text = String::new();
let mut current_thinking = String::new();
let mut current_signature = String::new();
let mut current_tool_id = String::new();
let mut current_tool_name = String::new();
let mut current_tool_json = String::new();
while let Some(chunk_result) = byte_stream.next().await {
if interrupt_flag.load(Ordering::Relaxed) {
return Err(SofosError::Interrupted);
}
let chunk = chunk_result
.map_err(|e| SofosError::NetworkError(format!("Stream read error: {}", e)))?;
buffer.push_str(&String::from_utf8_lossy(&chunk));
while let Some(pos) = buffer.find('\n') {
let line = buffer[..pos].to_string();
buffer = buffer[pos + 1..].to_string();
let line = line.trim_end();
let json_str = match line.strip_prefix("data: ") {
Some("[DONE]") => continue,
Some(s) => s,
None => continue,
};
let event: serde_json::Value = match serde_json::from_str(json_str) {
Ok(v) => v,
Err(_) => continue,
};
let event_type = event.get("type").and_then(|t| t.as_str()).unwrap_or("");
match event_type {
"message_start" => {
if let Some(msg) = event.get("message") {
message_id = msg
.get("id")
.and_then(|v| v.as_str())
.unwrap_or("")
.to_string();
model_name = msg
.get("model")
.and_then(|v| v.as_str())
.unwrap_or("")
.to_string();
if let Some(u) = msg.get("usage") {
input_tokens =
u.get("input_tokens").and_then(|v| v.as_u64()).unwrap_or(0)
as u32;
}
}
}
"content_block_start" => {
if let Some(block) = event.get("content_block") {
let btype = block.get("type").and_then(|t| t.as_str()).unwrap_or("");
current_block_type = Some(btype.to_string());
match btype {
"text" => current_text.clear(),
"thinking" => {
current_thinking.clear();
current_signature.clear();
}
"tool_use" | "server_tool_use" => {
current_tool_id = block
.get("id")
.and_then(|v| v.as_str())
.unwrap_or("")
.to_string();
current_tool_name = block
.get("name")
.and_then(|v| v.as_str())
.unwrap_or("")
.to_string();
current_tool_json.clear();
}
"web_search_tool_result" => {
if let Ok(result) =
serde_json::from_value::<WebSearchToolResultBlock>(
block.clone(),
)
{
content_blocks.push(ContentBlock::WebSearchToolResult {
tool_use_id: result.tool_use_id,
content: result.content,
});
}
current_block_type = None;
}
_ => {}
}
}
}
"content_block_delta" => {
if let Some(delta) = event.get("delta") {
let dtype = delta.get("type").and_then(|t| t.as_str()).unwrap_or("");
match dtype {
"text_delta" => {
if let Some(text) = delta.get("text").and_then(|v| v.as_str()) {
current_text.push_str(text);
on_text_delta(text);
}
}
"thinking_delta" => {
if let Some(thinking) =
delta.get("thinking").and_then(|v| v.as_str())
{
current_thinking.push_str(thinking);
on_thinking_delta(thinking);
}
}
"signature_delta" => {
if let Some(sig) =
delta.get("signature").and_then(|v| v.as_str())
{
current_signature.push_str(sig);
}
}
"input_json_delta" => {
if let Some(json_part) =
delta.get("partial_json").and_then(|v| v.as_str())
{
current_tool_json.push_str(json_part);
}
}
_ => {}
}
}
}
"content_block_stop" => {
match current_block_type.as_deref() {
Some("text") => {
content_blocks.push(ContentBlock::Text {
text: current_text.clone(),
});
}
Some("thinking") => {
content_blocks.push(ContentBlock::Thinking {
thinking: current_thinking.clone(),
signature: current_signature.clone(),
});
}
Some("tool_use") => {
let input = utils::parse_tool_arguments(
¤t_tool_name,
¤t_tool_json,
);
content_blocks.push(ContentBlock::ToolUse {
id: current_tool_id.clone(),
name: current_tool_name.clone(),
input,
});
}
Some("server_tool_use") => {
let input = utils::parse_tool_arguments(
¤t_tool_name,
¤t_tool_json,
);
content_blocks.push(ContentBlock::ServerToolUse {
id: current_tool_id.clone(),
name: current_tool_name.clone(),
input,
});
}
_ => {}
}
current_block_type = None;
}
"message_delta" => {
if let Some(delta) = event.get("delta") {
stop_reason = delta
.get("stop_reason")
.and_then(|v| v.as_str())
.map(String::from);
}
if let Some(u) = event.get("usage") {
output_tokens =
u.get("output_tokens").and_then(|v| v.as_u64()).unwrap_or(0) as u32;
}
}
"error" => {
let error_msg = event
.get("error")
.and_then(|e| e.get("message"))
.and_then(|m| m.as_str())
.unwrap_or("Unknown streaming error");
return Err(SofosError::Api(format!("Streaming error: {}", error_msg)));
}
_ => {}
}
}
}
Ok(utils::build_message_response(
message_id,
model_name,
content_blocks,
stop_reason,
input_tokens,
output_tokens,
))
}
}
#[derive(serde::Deserialize)]
struct WebSearchToolResultBlock {
tool_use_id: String,
#[serde(default)]
content: Vec<WebSearchResult>,
}
fn sanitize_messages_for_anthropic(messages: Vec<Message>) -> Vec<Message> {
messages
.into_iter()
.map(|mut msg| {
if let MessageContent::Blocks { content } = msg.content {
let filtered_content = content
.into_iter()
.filter_map(|block| match block {
MessageContentBlock::Summary { .. } => None,
other => Some(other),
})
.collect();
msg.content = MessageContent::Blocks {
content: filtered_content,
};
}
msg
})
.collect()
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_client_creation() {
let client = AnthropicClient::new("test-key".to_string());
assert!(client.is_ok());
}
#[test]
fn test_thinking_serialization() {
let thinking = Thinking::enabled(5120);
assert_eq!(thinking.thinking_type, "enabled");
assert_eq!(thinking.budget_tokens, 5120);
let json = serde_json::to_value(&thinking).unwrap();
assert_eq!(json["type"], "enabled");
assert_eq!(json["budget_tokens"], 5120);
}
#[test]
fn test_request_with_thinking() {
let thinking = Some(Thinking::enabled(3000));
let request = CreateMessageRequest {
model: "claude-sonnet-4-6".to_string(),
max_tokens: 8192,
messages: vec![],
system: None,
tools: None,
stream: None,
thinking,
reasoning: None,
};
let json = serde_json::to_value(&request).unwrap();
assert!(json["thinking"].is_object());
assert_eq!(json["thinking"]["type"], "enabled");
assert_eq!(json["thinking"]["budget_tokens"], 3000);
}
}