occt-wasm 3.0.1

//! Integration tests for the occt-wasm Rust crate.
//!
//! These tests require a real WASI WASM binary at `crate/src/occt-wasm.wasm.br`.
//! They are skipped (not failed) when the binary is a placeholder.
//!
//! To run: `cargo xtask build-wasi && cargo test -p occt-wasm`

#![allow(clippy::unwrap_used, clippy::panic)]

use occt_wasm::OcctKernel;

/// Try to create a kernel. Returns None if the embedded WASM is a placeholder
/// or if running in debug mode (WASM compilation is ~100x slower in debug).
fn try_kernel() -> Option<OcctKernel> {
    if cfg!(debug_assertions) {
        eprintln!(
            "Skipping test: WASM compilation too slow in debug mode. Use `cargo test --release`."
        );
        return None;
    }
    match OcctKernel::new() {
        Ok(k) => Some(k),
        Err(e) => {
            let msg = e.to_string();
            // Placeholder WASM is too small to be a real module
            if msg.contains("not enough bytes")
                || msg.contains("unknown import")
                || msg.contains("occt_init")
                || msg.contains("no memory export")
            {
                eprintln!(
                    "Skipping test: WASM binary is a placeholder. Run `cargo xtask build-wasi` first."
                );
                None
            } else {
                panic!("Unexpected kernel init error: {e:?}");
            }
        }
    }
}

#[test]
fn kernel_init_and_drop() {
    let Some(_kernel) = try_kernel() else { return };
    // Kernel initializes and drops cleanly
}

#[test]
fn make_box() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let shape = kernel.make_box(10.0, 20.0, 30.0).unwrap();
    assert!(shape.id() > 0);
}

#[test]
fn box_volume() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let shape = kernel.make_box(10.0, 20.0, 30.0).unwrap();
    let vol = kernel.get_volume(shape).unwrap();
    assert!((vol - 6000.0).abs() < 1.0, "expected ~6000, got {vol}");
}

#[test]
fn fuse_two_boxes() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let a = kernel.make_box(10.0, 10.0, 10.0).unwrap();
    let b = kernel.make_box(10.0, 10.0, 10.0).unwrap();
    let result = kernel.fuse(a, b).unwrap();
    let vol = kernel.get_volume(result).unwrap();
    // Fuse of identical boxes at origin = same volume (overlapping)
    assert!((vol - 1000.0).abs() < 1.0, "expected ~1000, got {vol}");
}

#[test]
fn cut_operation() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let box_shape = kernel.make_box(20.0, 20.0, 20.0).unwrap();
    let sphere = kernel.make_sphere(5.0).unwrap();
    let result = kernel.cut(box_shape, sphere).unwrap();
    let vol = kernel.get_volume(result).unwrap();
    // Box volume - sphere volume (partially inside)
    assert!(vol > 0.0 && vol < 8000.0, "unexpected volume: {vol}");
}

#[test]
fn bounding_box() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let shape = kernel.make_box(10.0, 20.0, 30.0).unwrap();
    let bbox = kernel.get_bounding_box(shape, true).unwrap();
    assert!((bbox.min.x).abs() < 0.01);
    assert!((bbox.min.y).abs() < 0.01);
    assert!((bbox.min.z).abs() < 0.01);
    assert!((bbox.max.x - 10.0).abs() < 0.01);
    assert!((bbox.max.y - 20.0).abs() < 0.01);
    assert!((bbox.max.z - 30.0).abs() < 0.01);
}

#[test]
fn tessellate_box() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let shape = kernel.make_box(10.0, 10.0, 10.0).unwrap();
    let mesh = kernel.tessellate(shape, 0.1, 0.5).unwrap();
    // A box has at least 8 vertices and 12 triangles
    assert!(
        mesh.positions.len() >= 24,
        "expected at least 24 position floats, got {}",
        mesh.positions.len()
    );
    assert!(
        mesh.indices.len() >= 36,
        "expected at least 36 index values, got {}",
        mesh.indices.len()
    );
    assert_eq!(mesh.positions.len(), mesh.normals.len());
}

#[test]
fn step_roundtrip() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let shape = kernel.make_box(10.0, 20.0, 30.0).unwrap();
    let step_data = kernel.export_step(shape).unwrap();
    assert!(step_data.contains("STEP"), "expected STEP format data");

    let imported = kernel.import_step(&step_data).unwrap();
    let vol = kernel.get_volume(imported).unwrap();
    assert!(
        (vol - 6000.0).abs() < 1.0,
        "roundtrip volume mismatch: {vol}"
    );
}

#[test]
fn make_cylinder_and_query() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let cyl = kernel.make_cylinder(5.0, 10.0).unwrap();
    let vol = kernel.get_volume(cyl).unwrap();
    let expected = std::f64::consts::PI * 25.0 * 10.0;
    assert!(
        (vol - expected).abs() < 1.0,
        "expected ~{expected:.0}, got {vol}"
    );
}

#[test]
fn make_sphere_surface_area() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let sphere = kernel.make_sphere(5.0).unwrap();
    let area = kernel.get_surface_area(sphere).unwrap();
    let expected = 4.0 * std::f64::consts::PI * 25.0;
    assert!(
        (area - expected).abs() < 1.0,
        "expected ~{expected:.0}, got {area}"
    );
}

#[test]
fn release_shape() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let shape = kernel.make_box(1.0, 1.0, 1.0).unwrap();
    kernel.release(shape).unwrap();
    // After release, the handle is invalid
}

#[test]
fn get_shape_type() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let shape = kernel.make_box(10.0, 10.0, 10.0).unwrap();
    let shape_type = kernel.get_shape_type(shape).unwrap();
    assert_eq!(shape_type, "Solid", "box should be a Solid");
}

#[test]
fn get_sub_shapes() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let shape = kernel.make_box(10.0, 10.0, 10.0).unwrap();
    let faces = kernel.get_sub_shapes(shape, "Face").unwrap();
    assert_eq!(faces.len(), 6, "box should have 6 faces");
}

#[test]
fn extrude_rectangle() {
    let Some(mut kernel) = try_kernel() else {
        return;
    };
    let rect = kernel.make_rectangle(10.0, 20.0).unwrap();
    let solid = kernel.extrude(rect, 0.0, 0.0, 5.0).unwrap();
    let vol = kernel.get_volume(solid).unwrap();
    assert!(
        (vol - 1000.0).abs() < 1.0,
        "expected 10*20*5=1000, got {vol}"
    );
}