quantrs2-device 0.1.3

//! Marketplace API Interface
//!
//! This module provides REST API, GraphQL, and WebSocket interfaces
//! for the quantum algorithm marketplace.

use super::*;

/// Marketplace API manager
pub struct MarketplaceAPI {
    config: APIConfig,
    rest_server: Option<RestAPIServer>,
    graphql_server: Option<GraphQLServer>,
    websocket_server: Option<WebSocketServer>,
    rate_limiter: RateLimiter,
}

/// REST API server
pub struct RestAPIServer {
    pub routes: Vec<APIRoute>,
    pub middleware: Vec<Box<dyn APIMiddleware + Send + Sync>>,
}

/// GraphQL server
pub struct GraphQLServer {
    pub schema: String,
    pub resolvers: Vec<Box<dyn GraphQLResolver + Send + Sync>>,
}

/// WebSocket server
pub struct WebSocketServer {
    pub connections: HashMap<String, WebSocketConnection>,
    pub handlers: Vec<Box<dyn WebSocketHandler + Send + Sync>>,
}

/// API route definition
#[derive(Debug, Clone)]
pub struct APIRoute {
    pub method: HTTPMethod,
    pub path: String,
    pub handler: String,
    pub authentication_required: bool,
    pub rate_limit: Option<usize>,
}

/// HTTP methods
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum HTTPMethod {
    GET,
    POST,
    PUT,
    DELETE,
    PATCH,
    OPTIONS,
}

/// API middleware trait
pub trait APIMiddleware {
    fn process_request(&self, request: &APIRequest) -> DeviceResult<APIRequest>;
    fn process_response(&self, response: &APIResponse) -> DeviceResult<APIResponse>;
}

/// GraphQL resolver trait
pub trait GraphQLResolver {
    fn resolve(
        &self,
        field: &str,
        args: &HashMap<String, serde_json::Value>,
    ) -> DeviceResult<serde_json::Value>;
}

/// WebSocket handler trait
pub trait WebSocketHandler {
    fn on_connect(&self, connection: &WebSocketConnection) -> DeviceResult<()>;
    fn on_message(&self, connection: &WebSocketConnection, message: &str) -> DeviceResult<()>;
    fn on_disconnect(&self, connection: &WebSocketConnection) -> DeviceResult<()>;
}

/// WebSocket connection
#[derive(Debug, Clone)]
pub struct WebSocketConnection {
    pub connection_id: String,
    pub user_id: Option<String>,
    pub connected_at: SystemTime,
    pub last_activity: SystemTime,
}

/// Rate limiter
pub struct RateLimiter {
    config: RateLimitingConfig,
    user_buckets: HashMap<String, TokenBucket>,
}

/// Token bucket for rate limiting
#[derive(Debug, Clone)]
pub struct TokenBucket {
    pub capacity: usize,
    pub tokens: usize,
    pub refill_rate: usize,
    pub last_refill: SystemTime,
}

/// API request
#[derive(Debug, Clone)]
pub struct APIRequest {
    pub method: HTTPMethod,
    pub path: String,
    pub headers: HashMap<String, String>,
    pub body: Option<String>,
    pub user_id: Option<String>,
}

/// API response
#[derive(Debug, Clone)]
pub struct APIResponse {
    pub status_code: u16,
    pub headers: HashMap<String, String>,
    pub body: Option<String>,
}

impl MarketplaceAPI {
    /// Create a new marketplace API
    pub fn new(config: &APIConfig) -> DeviceResult<Self> {
        let rest_server = if config.rest_api_enabled {
            Some(RestAPIServer::new()?)
        } else {
            None
        };

        let graphql_server = if config.graphql_api_enabled {
            Some(GraphQLServer::new()?)
        } else {
            None
        };

        let websocket_server = if config.websocket_api_enabled {
            Some(WebSocketServer::new()?)
        } else {
            None
        };

        Ok(Self {
            config: config.clone(),
            rest_server,
            graphql_server,
            websocket_server,
            rate_limiter: RateLimiter::new(&config.rate_limiting),
        })
    }

    /// Initialize the API
    pub async fn initialize(&self) -> DeviceResult<()> {
        // Initialize API servers
        Ok(())
    }
}

impl RestAPIServer {
    fn new() -> DeviceResult<Self> {
        Ok(Self {
            routes: vec![],
            middleware: vec![],
        })
    }
}

impl GraphQLServer {
    fn new() -> DeviceResult<Self> {
        Ok(Self {
            schema: String::new(),
            resolvers: vec![],
        })
    }
}

impl WebSocketServer {
    fn new() -> DeviceResult<Self> {
        Ok(Self {
            connections: HashMap::new(),
            handlers: vec![],
        })
    }
}

impl RateLimiter {
    fn new(config: &RateLimitingConfig) -> Self {
        Self {
            config: config.clone(),
            user_buckets: HashMap::new(),
        }
    }
}