//! Integration tests for the documented pipeline examples (see the crate-level docs).
//!
//! These assert that the runnable parts of the examples behave as documented and
//! that the scaffolded steps report `Error::Unimplemented` rather than panicking.

use std::path::Path;

use colmap::math::{Vec2, Vec3};
use colmap::scene::Camera;
use colmap::types::CameraModelId;
use colmap::Error;

/// Example 1 — basic building blocks: a pinhole camera projects an on-axis point
/// onto its principal point.
#[test]
fn basic_building_blocks_example() {
    let camera = Camera::new_with_model(1, CameraModelId::Pinhole, 800.0, 640, 480);
    assert_eq!(camera.model_name(), "PINHOLE");
    assert_eq!((camera.width, camera.height), (640, 480));

    let uv = camera.img_from_cam(&Vec3::new(0.0, 0.0, 1.0)).unwrap();
    assert_eq!(uv, Vec2::new(320.0, 240.0));

    // Option structs construct with sane defaults.
    let features = colmap::feature::FeatureExtractionOptions::default();
    assert!(features.sift.max_num_features > 0);
}

/// Example 2 — the workflow's option structs compose as documented.
#[test]
fn workflow_options_compose() {
    let sfm = colmap::sfm::IncrementalPipelineOptions::default();
    assert!(sfm.min_num_matches >= 1);
    let mvs = colmap::mvs::PatchMatchOptions::default();
    assert!(mvs.window_radius >= 1);
}

/// Example 3 — error handling: a scaffolded step returns `Error::Unimplemented`.
#[test]
fn scaffolded_step_reports_unimplemented() {
    use colmap::mvs::{patch_match_stereo, PatchMatchOptions};

    let result = patch_match_stereo(Path::new("/tmp/workspace"), &PatchMatchOptions::default());
    match result {
        Err(Error::Unimplemented(what)) => assert_eq!(what, "dense patch-match stereo"),
        other => panic!("expected Unimplemented, got {other:?}"),
    }
}