// file: crates/apps/game-android-entrypoint/src/lib.rs
// version: 1

#![warn(missing_docs)]
#![deny(unreachable_pub)]
#![allow(unsafe_code)]

//! Minimal SDL3 Android entry point.
//!
//! This crate is the only normalized Rust FFI export exception in the current workspace.
//! It uses one unsafe export attribute to expose `SDL_main` to `SDLActivity`; it contains no unsafe block and no unsafe function.

#[cfg(test)]
#[path = "../unit_tests/selection.rs"]
mod tests;

#[unsafe(export_name = "SDL_main")]
extern "C" fn sdl_main(_argc: core::ffi::c_int, _argv: *mut *mut core::ffi::c_char) -> core::ffi::c_int {
    return run_selected_game();
}

#[cfg(feature = "reflex")]
fn run_selected_game() -> core::ffi::c_int {
    let runtime = engine_v1_sdl::SdlRuntime::new("Reflex POC", 405, 720, std::time::Duration::from_millis(16));
    let mut game = game_reflex_poc::ReflexState::new();
    return run_game(&runtime, &mut game);
}

#[cfg(all(not(feature = "reflex"), feature = "snake"))]
fn run_selected_game() -> core::ffi::c_int {
    let runtime = engine_v1_sdl::SdlRuntime::new("Snake POC", 405, 720, std::time::Duration::from_millis(16));
    let mut game = game_snake_poc::SnakeState::new();
    return run_game(&runtime, &mut game);
}

#[cfg(not(any(feature = "reflex", feature = "snake")))]
fn run_selected_game() -> core::ffi::c_int {
    return 2;
}

#[cfg(any(feature = "reflex", feature = "snake"))]
fn run_game<G>(runtime: &engine_v1_sdl::SdlRuntime, game: &mut G) -> core::ffi::c_int
where
    G: engine_v1_common::EngineGame,
{
    match runtime.run(game) {
        std::result::Result::Ok(()) => return 0,
        std::result::Result::Err(error) => {
            eprintln!("Android SDL3 runtime error: {error}");
            return 1;
        },
    }
}