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// Copyright 2023 The HoraeDB Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! This crate provides an user-friendly client for [HoraeDB](https://github.com/HoraeDB /horaedb).
//!
//! With this crate, you can access a standalone HoraeDB or a HoraeDB cluster
//! and manipulates the data in it. And the underlying communication between the
//! client the HoraeDB servers is based on the gRPC, and the protocol is defined
//! in the [horaedbproto](https://github.com/CeresDB/horaedbproto).
//!
//! ## Choose Mode
//!
//! Two access [`Mode`](Mode)s are provided by the client, `Proxy` and `Direct`:
//! - When accessing HoraeDB cluster by `Direct` mode, the requests will be sent
//!   directly to the right HoraeDB instance determined by routing information.
//! - When accessing HoraeDB by `Proxy` mode, the requests are just sent to any
//!   one HoraeDB instance, which takes the responsibilities for forwarding the
//!   requests.
//!
//! If the client can't access the HoraeDB server directly because of the
//! network partition, `Proxy` mode is the only choice. Otherwise, `Direct` mode
//! is suggested for better performance.
//!
//! ## Usage
//!
//! Build the client, and then manipulate the HoraeDB by writing and querying.
//!
//! ### Example
//! Here is an example to create a table in HoraeDB by the client.
//!
//! ```rust,no_run
//! # use futures::prelude::*;
//!
//! # use horaedb_client::{Builder, Mode, RpcContext, SqlQueryRequest};
//! # fn main() {
//! # futures::executor::block_on(async {
//! let client = Builder::new("127.0.0.1:8831".to_string(), Mode::Direct).build();
//! let rpc_ctx = RpcContext::default().database("public".to_string());
//!
//! let create_table_sql = r#"CREATE TABLE IF NOT EXISTS horaedb (
//!     str_tag string TAG,
//!     int_tag int32 TAG,
//!     var_tag varbinary TAG,
//!     str_field string,
//!     int_field int32,
//!     bin_field varbinary,
//!     t timestamp NOT NULL,
//!     TIMESTAMP KEY(t)) ENGINE=Analytic with
//!     (enable_ttl='false')"#;
//!
//! let req = SqlQueryRequest {
//!     tables: vec!["horaedb".to_string()],
//!     sql: create_table_sql.to_string(),
//! };
//! let resp = client
//!     .sql_query(&rpc_ctx, &req)
//!     .await
//!     .expect("Should succeed to create table");
//!
//! println!("Create table result:{:?}", resp);
//! # });
//! # }
//! ```

mod config;
#[doc(hidden)]
pub mod db_client;
mod errors;
#[doc(hidden)]
pub mod model;
mod router;
mod rpc_client;
mod util;

#[doc(inline)]
pub use crate::{
    config::RpcConfig,
    db_client::{Builder, DbClient, Mode},
    errors::{Error, Result},
    model::{
        sql_query::{Request as SqlQueryRequest, Response as SqlQueryResponse},
        write::{Request as WriteRequest, Response as WriteResponse},
    },
    rpc_client::RpcContext,
};