use clap::Parser;
use serde::Deserialize;
pub const DEFAULT_LOG_LEVEL: &str = "off";
pub const DEFAULT_CONCURRENCY: usize = 10;
pub const DEFAULT_AUTH: Option<&str> = None;
#[derive(Deserialize, Debug, Parser)]
pub struct Config {
/// Gateway MCP endpoint URL
#[arg(long = "url", env = "MCP_SERVER_URL")]
pub mcp_server_url: String,
/// Authorization header value
#[arg(long = "auth", env = "MCP_AUTH")]
pub mcp_auth: Option<String>,
/// Max concurrent tool calls
#[arg(long, default_value_t = DEFAULT_CONCURRENCY, env = "CONCURRENCY")]
pub concurrency: usize,
#[arg(
long="log-level",
default_value_t = String::from(DEFAULT_LOG_LEVEL),
env="LOG_LEVEL"
)]
pub mcp_wrapper_log_level: String,
#[arg(short, long = "log-file", env = "MCP_LOG_FILE")]
pub mcp_wrapper_log_file: Option<String>,
/// Response timeout in seconds
#[arg(long = "timeout", default_value_t = 60, env = "MCP_TOOL_CALL_TIMEOUT")]
pub mcp_tool_call_timeout: u64,
/// Path to a custom CA certificate file (PEM format, e.g., .pem, .crt, .cert)
#[arg(long = "tls-cert", value_name = "PATH", env = "TLS_CERT")]
pub tls_cert: Option<std::path::PathBuf>,
/// Content type header to send to server
#[arg(
long,
short = 'c',
default_value = "application/json",
env = "MCP_CONTENT_TYPE"
)]
pub mcp_content_type: String,
/// Create separate HTTP connection pool per worker (default: false, uses shared pool)
#[arg(
long = "http-pool-per-worker",
default_value_t = false,
env = "HTTP_POOL_PER_WORKER"
)]
pub http_pool_per_worker: bool,
/// Maximum idle connections per host in the HTTP pool
#[arg(long = "http-pool-size", env = "HTTP_POOL_SIZE")]
pub http_pool_size: Option<usize>,
/// Enable HTTP/2 protocol (default: false)
#[arg(long = "http2", default_value_t = false, env = "HTTP2")]
pub http2: bool,
/// HTTP connection pool idle timeout in seconds
#[arg(long = "http-pool-idle-timeout", env = "HTTP_POOL_IDLE_TIMEOUT")]
pub http_pool_idle_timeout: Option<u64>,
/// Disable TLS certificate verification (insecure, use only for testing)
#[arg(long = "insecure", default_value_t = false, env = "INSECURE")]
pub insecure: bool,
}
