datafusion-dft 0.3.0

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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.

//! Configuration management handling

use std::path::PathBuf;

#[cfg(any(feature = "flightsql", feature = "http"))]
use std::net::{IpAddr, Ipv4Addr, SocketAddr};

use datafusion_app::config::ExecutionConfig;
use directories::{ProjectDirs, UserDirs};
use lazy_static::lazy_static;
use log::{debug, error};
use serde::Deserialize;

#[cfg(any(feature = "flightsql", feature = "http"))]
use datafusion_app::config::AuthConfig;
#[cfg(feature = "flightsql")]
use std::collections::HashMap;
use url::Url;

lazy_static! {
    pub static ref PROJECT_NAME: String = env!("CARGO_CRATE_NAME").to_uppercase().to_string();
    pub static ref DATA_FOLDER: Option<PathBuf> =
        std::env::var(format!("{}_DATA", PROJECT_NAME.clone()))
            .ok()
            .map(PathBuf::from);
    pub static ref LOG_ENV: String = format!("{}_LOGLEVEL", PROJECT_NAME.clone());
    pub static ref LOG_FILE: String = format!("{}.log", env!("CARGO_PKG_NAME"));
}

fn project_directory() -> PathBuf {
    if let Some(user_dirs) = UserDirs::new() {
        return user_dirs.home_dir().join(".config").join("dft");
    };

    let maybe_project_dirs = ProjectDirs::from("", "", env!("CARGO_PKG_NAME"));
    if let Some(project_dirs) = maybe_project_dirs {
        project_dirs.data_local_dir().to_path_buf()
    } else {
        panic!("No known data directory")
    }
}

pub fn get_data_dir() -> PathBuf {
    if let Some(data_dir) = DATA_FOLDER.clone() {
        data_dir
    } else {
        project_directory()
    }
}

#[derive(Clone, Debug, Default, Deserialize)]
pub struct CliConfig {
    #[serde(default = "default_execution_config")]
    pub execution: ExecutionConfig,
}

#[cfg(feature = "tui")]
#[derive(Clone, Debug, Default, Deserialize)]
pub struct TuiConfig {
    #[serde(default = "default_execution_config")]
    pub execution: ExecutionConfig,
    #[serde(default = "default_display_config")]
    pub display: DisplayConfig,
    #[serde(default = "default_interaction_config")]
    pub interaction: InteractionConfig,
    #[serde(default = "default_editor_config")]
    pub editor: EditorConfig,
}

#[cfg(feature = "flightsql")]
#[derive(Clone, Debug, Deserialize)]
pub struct FlightSQLServerConfig {
    #[serde(default = "default_execution_config")]
    pub execution: ExecutionConfig,
    #[serde(default = "default_connection_url")]
    pub connection_url: String,
    #[serde(default = "default_server_metrics_addr")]
    pub server_metrics_addr: SocketAddr,
    #[serde(default = "default_auth_config")]
    pub auth: AuthConfig,
}

#[cfg(feature = "flightsql")]
impl Default for FlightSQLServerConfig {
    fn default() -> Self {
        Self {
            execution: default_execution_config(),
            connection_url: default_connection_url(),
            server_metrics_addr: default_server_metrics_addr(),
            auth: default_auth_config(),
        }
    }
}

#[cfg(feature = "flightsql")]
#[derive(Clone, Debug, Deserialize)]
pub struct FlightSQLClientConfig {
    #[serde(default = "default_connection_url")]
    pub connection_url: String,
    #[serde(default = "default_benchmark_iterations")]
    pub benchmark_iterations: usize,
    #[serde(default = "default_auth_config")]
    pub auth: AuthConfig,
    #[serde(default = "default_headers")]
    pub headers: HashMap<String, String>,
    #[serde(default)]
    pub headers_file: Option<PathBuf>,
}

#[cfg(feature = "flightsql")]
impl Default for FlightSQLClientConfig {
    fn default() -> Self {
        Self {
            connection_url: default_connection_url(),
            benchmark_iterations: default_benchmark_iterations(),
            auth: default_auth_config(),
            headers: default_headers(),
            headers_file: None,
        }
    }
}

#[cfg(feature = "http")]
#[derive(Clone, Debug, Deserialize)]
pub struct HttpServerConfig {
    #[serde(default = "default_execution_config")]
    pub execution: ExecutionConfig,
    #[serde(default = "default_connection_url")]
    pub connection_url: String,
    #[serde(default = "default_server_metrics_addr")]
    pub server_metrics_addr: SocketAddr,
    #[serde(default = "default_auth_config")]
    pub auth: AuthConfig,
    #[serde(default = "default_timeout_seconds")]
    pub timeout_seconds: u64,
    #[serde(default = "default_result_limit")]
    pub result_limit: usize,
}

#[cfg(feature = "http")]
impl Default for HttpServerConfig {
    fn default() -> Self {
        Self {
            execution: default_execution_config(),
            connection_url: default_connection_url(),
            server_metrics_addr: default_server_metrics_addr(),
            auth: default_auth_config(),
            timeout_seconds: default_timeout_seconds(),
            result_limit: default_result_limit(),
        }
    }
}

#[derive(Clone, Debug, Default, Deserialize)]
pub struct AppConfig {
    #[serde(default)]
    pub shared: ExecutionConfig,
    #[serde(default)]
    pub cli: CliConfig,
    #[cfg(feature = "tui")]
    #[serde(default)]
    pub tui: TuiConfig,
    #[cfg(feature = "flightsql")]
    #[serde(default)]
    pub flightsql_client: FlightSQLClientConfig,
    #[cfg(feature = "flightsql")]
    #[serde(default)]
    pub flightsql_server: FlightSQLServerConfig,
    #[cfg(feature = "http")]
    #[serde(default)]
    pub http_server: HttpServerConfig,
    #[serde(default = "default_db_config")]
    pub db: DbConfig,
}

fn default_execution_config() -> ExecutionConfig {
    ExecutionConfig::default()
}

#[cfg(feature = "tui")]
fn default_display_config() -> DisplayConfig {
    DisplayConfig::default()
}

#[cfg(feature = "tui")]
fn default_interaction_config() -> InteractionConfig {
    InteractionConfig::default()
}

#[derive(Debug, Clone, Deserialize)]
pub struct DbConfig {
    #[serde(default = "default_db_path")]
    pub path: Url,
}

impl Default for DbConfig {
    fn default() -> Self {
        default_db_config()
    }
}

fn default_db_config() -> DbConfig {
    DbConfig {
        path: default_db_path(),
    }
}

#[allow(unused)]
fn default_db_path() -> Url {
    let base = directories::BaseDirs::new().expect("Base directories should be available");
    let path = base
        .data_dir()
        .to_path_buf()
        .join("dft/")
        .to_str()
        .unwrap()
        .to_string();
    let with_schema = format!("file://{path}");
    Url::parse(&with_schema).unwrap()
}

#[cfg(feature = "tui")]
#[derive(Clone, Debug, Deserialize)]
pub struct DisplayConfig {
    #[serde(default = "default_frame_rate")]
    pub frame_rate: f64,
}

#[cfg(feature = "tui")]
fn default_frame_rate() -> f64 {
    30.0
}

#[cfg(feature = "tui")]
impl Default for DisplayConfig {
    fn default() -> Self {
        Self { frame_rate: 30.0 }
    }
}

#[cfg(feature = "flightsql")]
fn default_benchmark_iterations() -> usize {
    10
}

#[cfg(feature = "tui")]
#[derive(Clone, Debug, Default, Deserialize)]
pub struct InteractionConfig {
    #[serde(default = "default_mouse")]
    pub mouse: bool,
    #[serde(default = "default_paste")]
    pub paste: bool,
}

#[cfg(feature = "tui")]
fn default_mouse() -> bool {
    false
}

#[cfg(feature = "tui")]
fn default_paste() -> bool {
    false
}

#[cfg(any(feature = "flightsql", feature = "http"))]
pub fn default_connection_url() -> String {
    "http://localhost:50051".to_string()
}

#[cfg(feature = "flightsql")]
pub fn default_headers() -> HashMap<String, String> {
    HashMap::new()
}

#[cfg(any(feature = "flightsql", feature = "http"))]
fn default_server_metrics_addr() -> SocketAddr {
    SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 9000)
}

#[cfg(feature = "tui")]
#[derive(Clone, Debug, Default, Deserialize)]
pub struct EditorConfig {
    pub experimental_syntax_highlighting: bool,
}

#[cfg(feature = "tui")]
fn default_editor_config() -> EditorConfig {
    EditorConfig::default()
}

#[cfg(any(feature = "flightsql", feature = "http"))]
fn default_auth_config() -> AuthConfig {
    AuthConfig::default()
}

#[cfg(feature = "http")]
fn default_timeout_seconds() -> u64 {
    10
}

#[cfg(feature = "http")]
fn default_result_limit() -> usize {
    1000
}

pub fn create_config(config_path: PathBuf) -> AppConfig {
    if config_path.exists() {
        debug!("Config exists");
        let maybe_config_contents = std::fs::read_to_string(config_path);
        if let Ok(config_contents) = maybe_config_contents {
            let maybe_parsed_config: std::result::Result<AppConfig, toml::de::Error> =
                toml::from_str(&config_contents);
            match maybe_parsed_config {
                Ok(parsed_config) => {
                    debug!("Parsed config: {:?}", parsed_config);
                    parsed_config
                }
                Err(err) => {
                    error!("Error parsing config: {:?}", err);
                    AppConfig::default()
                }
            }
        } else {
            AppConfig::default()
        }
    } else {
        debug!("No config, using default");
        AppConfig::default()
    }
}