Verbatim/tests/physics_materials.rs

use verbatim::ai::GameSession;
use verbatim::ai::AiAction;

fn setup() -> GameSession {
    let mut s = GameSession::new_seeded(42);
    s.init_empty();
    s.clear_area(90, 90, 50, 50);
    s
}

#[test]
fn fire_dies_over_time() {
    let mut s = setup();
    s.perform_action(&AiAction::FillRect { x: 100, y: 120, w: 10, h: 1, material: "stone".into() });
    s.perform_action(&AiAction::SetCell { x: 105, y: 119, material: "fire".into() });
    s.step(60);
    assert_ne!(s.get_cell(105, 119).material, "fire", "fire should die after 60 ticks");
}

#[test]
fn fire_ignites_wood() {
    let mut s = setup();
    s.perform_action(&AiAction::FillRect { x: 100, y: 120, w: 10, h: 1, material: "stone".into() });
    s.perform_action(&AiAction::SetCell { x: 104, y: 119, material: "wood".into() });
    s.perform_action(&AiAction::SetCell { x: 105, y: 119, material: "fire".into() });
    s.step(20);
    assert_ne!(s.get_cell(104, 119).material, "wood", "wood should be ignited by fire");
}

#[test]
fn fire_ignites_grass() {
    let mut s = setup();
    s.perform_action(&AiAction::FillRect { x: 100, y: 120, w: 10, h: 1, material: "stone".into() });
    s.perform_action(&AiAction::FillRect { x: 100, y: 119, w: 8, h: 1, material: "grass".into() });
    s.perform_action(&AiAction::SetCell { x: 100, y: 119, material: "fire".into() });
    s.step(30);
    let grass_left = s.count_material_in_region(99, 118, 10, 3, "grass");
    assert_eq!(grass_left, 0, "fire should spread through grass");
}

#[test]
fn fire_ignites_flesh() {
    let mut s = setup();
    s.perform_action(&AiAction::FillRect { x: 100, y: 120, w: 10, h: 1, material: "stone".into() });
    s.perform_action(&AiAction::SetCell { x: 104, y: 119, material: "flesh".into() });
    s.perform_action(&AiAction::SetCell { x: 105, y: 119, material: "fire".into() });
    s.step(30);
    assert_ne!(s.get_cell(104, 119).material, "flesh", "flesh should be ignited by fire");
}

#[test]
fn smoke_rises() {
    let mut s = setup();
    s.perform_action(&AiAction::FillRect { x: 100, y: 120, w: 10, h: 1, material: "stone".into() });
    s.perform_action(&AiAction::FillRect { x: 100, y: 110, w: 10, h: 1, material: "stone".into() });
    for y in 114..118 {
        for x in 104..107 {
            s.perform_action(&AiAction::SetCell { x, y, material: "smoke".into() });
        }
    }
    s.step(15);
    let smoke_above = s.count_material_in_region(100, 111, 10, 3, "smoke");
    assert!(smoke_above > 0, "smoke should rise toward ceiling");
}

#[test]
fn smoke_dissipates_over_time() {
    let mut s = setup();
    s.perform_action(&AiAction::SetCell { x: 105, y: 105, material: "smoke".into() });
    s.step(120);
    let smoke_left = s.count_material_in_region(100, 100, 10, 10, "smoke");
    assert_eq!(smoke_left, 0, "smoke should dissipate after 120 ticks");
}

#[test]
fn steam_condenses_to_water() {
    let mut s = setup();
    s.perform_action(&AiAction::FillRect { x: 100, y: 125, w: 10, h: 1, material: "stone".into() });
    for y in 118..123 {
        for x in 103..108 {
            s.perform_action(&AiAction::SetCell { x, y, material: "steam".into() });
        }
    }
    s.step(150);
    let water_or_steam = s.count_material_in_region(100, 118, 10, 8, "water")
        + s.count_material_in_region(100, 118, 10, 8, "steam");
    assert!(water_or_steam > 0, "steam should condense to water or remain steam: water+steam={}", water_or_steam);
    let water_count = s.count_material_in_region(100, 118, 10, 8, "water");
    assert!(water_count > 0, "some steam should have condensed to water by now: water={}", water_count);
}

#[test]
fn steam_rises() {
    let mut s = setup();
    s.perform_action(&AiAction::FillRect { x: 100, y: 130, w: 10, h: 1, material: "stone".into() });
    s.perform_action(&AiAction::FillRect { x: 100, y: 100, w: 10, h: 1, material: "stone".into() });
    s.perform_action(&AiAction::SetCell { x: 105, y: 125, material: "steam".into() });
    s.step(20);
    let steam_above = s.count_material_in_region(100, 105, 10, 10, "steam");
    assert!(steam_above > 0, "steam should rise upward");
}

#[test]
fn grass_is_solid() {
    let mut s = setup();
    s.perform_action(&AiAction::SetCell { x: 105, y: 110, material: "grass".into() });
    let cell = s.get_cell(105, 110);
    assert!(cell.is_solid, "grass should be solid");
}

#[test]
fn dirt_is_solid() {
    let mut s = setup();
    s.perform_action(&AiAction::SetCell { x: 105, y: 110, material: "dirt".into() });
    let cell = s.get_cell(105, 110);
    assert!(cell.is_solid, "dirt should be solid");
}

#[test]
fn stone_is_static() {
    let mut s = setup();
    s.perform_action(&AiAction::SetCell { x: 105, y: 110, material: "stone".into() });
    s.step(20);
    assert_eq!(s.get_cell(105, 110).material, "stone", "stone should not move");
}

#[test]
fn wood_is_static() {
    let mut s = setup();
    s.perform_action(&AiAction::SetCell { x: 105, y: 110, material: "wood".into() });
    s.step(20);
    assert_eq!(s.get_cell(105, 110).material, "wood", "wood should not move");
}

#[test]
fn bone_is_static() {
    let mut s = setup();
    s.perform_action(&AiAction::SetCell { x: 105, y: 110, material: "bone".into() });
    s.step(20);
    assert_eq!(s.get_cell(105, 110).material, "bone", "bone should not move");
}

#[test]
fn lava_initial_temp_is_high() {
    let mut s = setup();
    s.perform_action(&AiAction::SetCell { x: 105, y: 110, material: "lava".into() });
    let cell = s.get_cell(105, 110);
    assert!(cell.temp > 1000.0, "lava should start very hot, got {}°C", cell.temp);
}

#[test]
fn water_initial_temp_is_room() {
    let mut s = setup();
    s.perform_action(&AiAction::SetCell { x: 105, y: 110, material: "water".into() });
    let cell = s.get_cell(105, 110);
    assert!(cell.temp < 50.0, "water should start at room temp, got {}°C", cell.temp);
}