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//! The OPC UA Server module contains all server side functionality - address space, services,
//! server security, session management, local discovery server registration and subscriptions.

extern crate chrono;
#[cfg(feature = "http")]
extern crate hyper;
#[macro_use]
extern crate log;
#[macro_use]
extern crate bitflags;
extern crate ring;
extern crate serde;
#[macro_use]
extern crate serde_derive;
extern crate serde_json;
extern crate time;
extern crate futures;
extern crate tokio;
extern crate tokio_io;
extern crate tokio_timer;

extern crate opcua_client;
#[macro_use]
extern crate opcua_core;
extern crate opcua_types;

type DateTimeUtc = chrono::DateTime<chrono::Utc>;

mod services;
mod session;
mod discovery;
mod completion_pact;

pub mod comms;
pub mod metrics;
pub mod server;
pub mod state;
pub mod diagnostics;
pub mod subscriptions;
pub mod config;
pub mod address_space;
pub mod util;
pub mod continuation_point;
#[cfg(feature = "http")]
pub mod http;

pub mod prelude {
    pub use opcua_types::status_codes::StatusCode;
    pub use opcua_types::service_types::*;
    pub use opcua_core::prelude::*;
    pub use config::*;
    pub use server::*;
    pub use address_space::types::*;
    pub use subscriptions::*;
    pub use subscriptions::subscription::*;
    pub use subscriptions::monitored_item::*;
    pub use util::*;
}

/// Constants that govern the internal workings of the server impl.
pub mod constants {
    use opcua_types::Double;

    /// The default hello timeout period in seconds
    pub const DEFAULT_HELLO_TIMEOUT_SECONDS: u32 = 120;
    /// Default OPC UA server port for this implementation
    pub const DEFAULT_RUST_OPC_UA_SERVER_PORT: u16 = 4855;
    /// Default maximum number of subscriptions in a session
    pub const DEFAULT_MAX_SUBSCRIPTIONS: u32 = 100;
    /// Default, well known address for TCP discovery server
    pub const DEFAULT_DISCOVERY_SERVER_URL: &str = "opc.tcp://localhost:4840/UADiscovery";

    // Internally controlled values

    /// The polling interval in millis on subscriptions and monitored items. The more
    /// finegrained this is, the more often subscriptions will be checked for changes. The minimum
    /// publish interval cannot be less than this.
    pub const SUBSCRIPTION_TIMER_RATE_MS: u64 = 100;
    /// Minimum publishing interval for subscriptions
    pub const MIN_PUBLISHING_INTERVAL: Double = (SUBSCRIPTION_TIMER_RATE_MS as f64) / 1000.0;
    /// Minimum sampling interval on monitored items
    pub const MIN_SAMPLING_INTERVAL: Double = (SUBSCRIPTION_TIMER_RATE_MS as f64) / 1000.0;
    /// Maximum data change queue allowed by clients on monitored items
    pub const MAX_DATA_CHANGE_QUEUE_SIZE: usize = 10;
    /// The default size of preallocated vecs of monitored items per subscription
    pub const DEFAULT_MONITORED_ITEM_CAPACITY: usize = 100;
    /// Interval to check for HELLO timeout in millis. This can be fairly coarse because it's not
    /// something that requires huge accuracy.
    pub const HELLO_TIMEOUT_POLL_MS: u64 = 500;
    /// Time in MS that a session will timeout after with inactivity
    pub const SESSION_TIMEOUT: f64 = 50000f64;
    /// Maximum size in bytes that a request message is allowed to be
    pub const MAX_REQUEST_MESSAGE_SIZE: u32 = 32768;
    /// Default keep alive count
    pub const DEFAULT_KEEP_ALIVE_COUNT: u32 = 10;
    /// Maxmimum keep alive count
    pub const MAX_KEEP_ALIVE_COUNT: u32 = 30000;
    /// Maximum browse continuation points
    pub const MAX_BROWSE_CONTINUATION_POINTS: usize = 10;
    /// Maximum history continuation points
    pub const MAX_HISTORY_CONTINUATION_POINTS: usize = 0;
    /// Maximum query continuation points
    pub const MAX_QUERY_CONTINUATION_POINTS: usize = 0;
    /// Maximum method calls per request
    pub const MAX_METHOD_CALLS: usize = 10;
}

#[cfg(test)]
mod tests;