//! Golden-path integration tests against the generated demo game.
//! (Run `mrpci-headless --sample` first; CI does.)

use mrpci_core::path::{find_path, nearest_open, Passable};
use mrpci_core::{Command, GameState, World};

fn game_dir() -> Option<String> {
    for p in ["games/neon-precinct", "../games/neon-precinct"] {
        if std::path::Path::new(p).join("game.json").exists() {
            return Some(p.to_string());
        }
    }
    None
}

#[test]
fn ego_can_cross_neon_row() {
    let Some(dir) = game_dir() else {
        eprintln!("demo game not generated; skipping");
        return;
    };
    let world = World::load_game(dir);
    let mut gs = GameState::new(world);
    gs.apply(Command::NewGame { room: None });

    let p = Passable {
        s: &gs.world.screens,
        half_w: 8,
        water_ok: false,
        min: (4, 8),
        max: (316, 188),
    };
    let start = (gs.ego.x, gs.ego.y);
    eprintln!("start {:?} open={:?}", start, nearest_open(&p, start));
    eprintln!("goal open={:?}", nearest_open(&p, (316, 150)));
    let path = find_path(&p, start, (316, 150));
    eprintln!("path: {:?}", path);
    assert!(!path.is_empty(), "no path across Neon Row");

    let evs = gs.apply(Command::WalkTo { x: 316, y: 150 });
    let moved = format!("{:?}", (gs.ego.x, gs.ego.y, gs.world.current));
    eprintln!("after walk: {} events={}", moved, evs.len());
    assert_eq!(gs.world.current, 2, "edge exit east should reach Rain Alley (ego at {})", moved);
}