bloop-sdk 0.2.0

use std::sync::Mutex;
use crate::event::{Event, IngestEvent};
use crate::signing;
use crate::trace::Trace;
use crate::types::TraceData;

/// Builder for `BloopClient`.
#[derive(Debug, Clone)]
pub struct BloopClientBuilder {
    endpoint: Option<String>,
    project_key: Option<String>,
    environment: String,
    release: String,
    source: String,
    max_buffer_size: usize,
}

impl BloopClientBuilder {
    pub fn new() -> Self {
        Self {
            endpoint: None,
            project_key: None,
            environment: "production".into(),
            release: String::new(),
            source: "rust".into(),
            max_buffer_size: 20,
        }
    }

    pub fn endpoint(mut self, endpoint: impl Into<String>) -> Self {
        self.endpoint = Some(endpoint.into());
        self
    }

    pub fn project_key(mut self, key: impl Into<String>) -> Self {
        self.project_key = Some(key.into());
        self
    }

    pub fn environment(mut self, env: impl Into<String>) -> Self {
        self.environment = env.into();
        self
    }

    pub fn release(mut self, release: impl Into<String>) -> Self {
        self.release = release.into();
        self
    }

    pub fn source(mut self, source: impl Into<String>) -> Self {
        self.source = source.into();
        self
    }

    pub fn max_buffer_size(mut self, size: usize) -> Self {
        self.max_buffer_size = size;
        self
    }

    pub fn build(self) -> Result<BloopClient, String> {
        let endpoint = self.endpoint.ok_or("endpoint is required")?;
        let project_key = self.project_key.ok_or("project_key is required")?;

        Ok(BloopClient {
            endpoint: endpoint.trim_end_matches('/').to_string(),
            project_key,
            environment: self.environment,
            release: self.release,
            source: self.source,
            max_buffer_size: self.max_buffer_size,
            error_buffer: Mutex::new(Vec::new()),
            trace_buffer: Mutex::new(Vec::new()),
        })
    }
}

impl Default for BloopClientBuilder {
    fn default() -> Self {
        Self::new()
    }
}

/// Bloop error reporting and LLM tracing client.
///
/// Uses `ureq` (blocking HTTP) by default. Enable the `async` feature
/// for `reqwest`-based async transport.
pub struct BloopClient {
    endpoint: String,
    project_key: String,
    environment: String,
    release: String,
    source: String,
    max_buffer_size: usize,
    error_buffer: Mutex<Vec<IngestEvent>>,
    trace_buffer: Mutex<Vec<TraceData>>,
}

impl BloopClient {
    pub fn builder() -> BloopClientBuilder {
        BloopClientBuilder::new()
    }

    /// Capture a structured error event.
    pub fn capture(&self, event: Event) {
        let now = std::time::SystemTime::now()
            .duration_since(std::time::UNIX_EPOCH)
            .unwrap()
            .as_secs() as i64;

        let ingest = IngestEvent {
            timestamp: now,
            source: event.source.unwrap_or_else(|| self.source.clone()),
            environment: self.environment.clone(),
            release: self.release.clone(),
            error_type: event.error_type,
            message: event.message,
            route_or_procedure: event.route_or_procedure,
            screen: event.screen,
            stack: event.stack,
            http_status: event.http_status,
            request_id: event.request_id,
            user_id_hash: event.user_id_hash,
            metadata: event.metadata,
        };

        let mut buf = self.error_buffer.lock().unwrap();
        buf.push(ingest);
        if buf.len() >= self.max_buffer_size {
            let batch = std::mem::take(&mut *buf);
            drop(buf);
            self.send_error_batch(batch);
        }
    }

    /// Convenience: capture just an error type and message.
    pub fn capture_error(&self, error_type: impl Into<String>, message: impl Into<String>) {
        self.capture(Event {
            error_type: error_type.into(),
            message: message.into(),
            ..Default::default()
        });
    }

    /// Start a new LLM trace.
    pub fn start_trace(&self, name: impl Into<String>) -> Trace {
        Trace::new(name)
    }

    /// Buffer a completed trace for sending.
    pub fn send_trace(&self, trace: Trace) {
        let data = trace.to_data();
        let mut buf = self.trace_buffer.lock().unwrap();
        buf.push(data);
        if buf.len() >= self.max_buffer_size {
            let batch = std::mem::take(&mut *buf);
            drop(buf);
            self.send_trace_batch(batch);
        }
    }

    /// Flush all buffered events and traces.
    pub fn flush(&self) {
        // Flush errors
        let errors = {
            let mut buf = self.error_buffer.lock().unwrap();
            std::mem::take(&mut *buf)
        };
        if !errors.is_empty() {
            self.send_error_batch(errors);
        }

        // Flush traces
        let traces = {
            let mut buf = self.trace_buffer.lock().unwrap();
            std::mem::take(&mut *buf)
        };
        if !traces.is_empty() {
            self.send_trace_batch(traces);
        }
    }

    /// Flush and shutdown.
    pub fn close(&self) {
        self.flush();
    }

    // ── HTTP Transport ──

    fn post(&self, path: &str, body: &[u8]) {
        let url = format!("{}{}", self.endpoint, path);
        let signature = signing::sign(&self.project_key, body);

        #[cfg(feature = "blocking")]
        {
            let _ = ureq::post(&url)
                .set("Content-Type", "application/json")
                .set("X-Signature", &signature)
                .set("X-Project-Key", &self.project_key)
                .send_bytes(body);
        }

        #[cfg(all(feature = "async", not(feature = "blocking")))]
        {
            // For async feature, we'd need a runtime. For now, silently drop.
            // In practice, users would use the async API.
            let _ = (url, signature, body);
        }

        #[cfg(not(any(feature = "blocking", feature = "async")))]
        {
            let _ = (url, signature, body);
        }
    }

    fn send_error_batch(&self, events: Vec<IngestEvent>) {
        if let Ok(body) = serde_json::to_vec(&serde_json::json!({ "events": events })) {
            self.post("/v1/ingest/batch", &body);
        }
    }

    fn send_trace_batch(&self, traces: Vec<TraceData>) {
        if let Ok(body) = serde_json::to_vec(&serde_json::json!({ "traces": traces })) {
            self.post("/v1/traces/batch", &body);
        }
    }
}

impl std::fmt::Debug for BloopClient {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("BloopClient")
            .field("endpoint", &self.endpoint)
            .field("environment", &self.environment)
            .field("source", &self.source)
            .finish()
    }
}