//! Desktop shell for Paperdoll Renderer project files.
//!
//! The window creates and saves a `.ppd` project directory. It does not import
//! models and it does not render paperdolls.

use std::process::ExitCode;

use paperdoll_renderer::editor::EditorApp;
use paperdoll_renderer::foundation::{help_text, parse_cli, report, CliError, CliRequest};

fn main() -> ExitCode {
    let args: Vec<String> = std::env::args().skip(1).collect();
    let borrowed: Vec<&str> = args.iter().map(String::as_str).collect();
    match parse_cli(borrowed) {
        Ok(CliRequest::PrintHelp) => {
            println!("{}", help_text());
            ExitCode::SUCCESS
        }
        Ok(CliRequest::PrintStatus) => {
            println!("{}", report());
            ExitCode::SUCCESS
        }
        Ok(CliRequest::OpenWindow) => {
            if let Some(message) = window_preflight() {
                eprintln!("paperdoll-renderer: {message}");
                return ExitCode::from(1);
            }
            match run_window() {
                Ok(()) => ExitCode::SUCCESS,
                Err(err) => {
                    eprintln!("paperdoll-renderer: het projectvenster openen is mislukt: {err}");
                    ExitCode::from(1)
                }
            }
        }
        Err(CliError::UnknownArgument(arg)) => {
            eprintln!("paperdoll-renderer: onbekend argument '{arg}'.");
            eprintln!("Import en render zijn niet gebouwd. Gebruik --help.");
            ExitCode::from(2)
        }
    }
}

fn window_preflight() -> Option<String> {
    #[cfg(target_os = "linux")]
    {
        let missing = paperdoll_renderer::foundation::missing_window_libraries();
        if missing.is_empty() {
            None
        } else {
            Some(paperdoll_renderer::foundation::missing_library_message(
                &missing,
            ))
        }
    }
    #[cfg(not(target_os = "linux"))]
    {
        None
    }
}

fn run_window() -> eframe::Result<()> {
    let options = eframe::NativeOptions {
        viewport: eframe::egui::ViewportBuilder::default()
            .with_title("Paperdoll Renderer")
            .with_inner_size([980.0, 680.0])
            .with_min_inner_size([720.0, 480.0]),
        ..Default::default()
    };
    eframe::run_native(
        "Paperdoll Renderer",
        options,
        Box::new(|_creation| Ok(Box::<EditorApp>::default())),
    )
}