// TODO: Header

use std::error::Error;
use std::process::{Command, Stdio};
use structopt::StructOpt;

pub mod gui;
pub mod tui;

/// Command line interface IDE with full GUI and headless modes.
/// If no flags are provided the GUI editor is launched in a separate process.
/// If no path is provided the current directory is used.
#[derive(StructOpt, Debug)]
#[structopt(name = "clide", verbatim_doc_comment)]
struct Cli {
    /// The root directory for the project to open with the clide editor.
    #[structopt(parse(from_os_str))]
    pub path: Option<std::path::PathBuf>,

    /// Run clide in headless mode.
    #[structopt(name = "tui", short, long)]
    pub tui: bool,

    /// Run the clide GUI in the current process, blocking the terminal and showing all output streams.
    #[structopt(name = "gui", short, long)]
    pub gui: bool,
}

fn main() -> Result<(), Box<dyn Error>> {
    let args = Cli::from_args();

    let root_path = match args.path {
        // If the CLI was provided a directory convert it to absolute.
        Some(path) => std::path::absolute(path)?,
        // If no path was provided, use current directory.
        None => std::env::current_dir().unwrap_or_else(|_|
                // If we can't find the CWD attempt to open the home directory.
                dirs::home_dir().expect("Failed to access filesystem.")),
    };

    match args.gui {
        true => gui::run(root_path),
        false => match args.tui {
            // Open the TUI editor if requested, otherwise use the QML GUI by default.
            true => tui::run(root_path),
            false => {
                // Relaunch the CLIDE GUI in a separate process.
                Command::new(std::env::current_exe()?)
                    .args(&["--gui"])
                    .stdout(Stdio::null())
                    .stderr(Stdio::null())
                    .stdin(Stdio::null())
                    .spawn()?;
                Ok(())
            }
        },
    }
}