mod fakes;

use archlens_domain::{CodeGraph, NormalizedGraph, ports::DiagramRenderer};
use archlens_application::use_cases::diff_diagram::DiffDiagram;
use fakes::FakeDiagramRenderer;

fn empty_graph() -> NormalizedGraph {
    NormalizedGraph::from_project(CodeGraph::new())
}

#[test]
fn no_diff_when_content_matches() {
    let graph = empty_graph();
    let renderer = FakeDiagramRenderer::new();
    let rendered = renderer.render(graph.as_graph()).unwrap();
    let existing = rendered.files().first().unwrap().content().to_string();

    let result = DiffDiagram {
        graph: &graph,
        renderer: &renderer,
        existing_content: &existing,
    }
    .execute()
    .unwrap();

    assert!(result.is_empty());
}

#[test]
fn detects_added_lines() {
    let graph = empty_graph();
    let renderer = FakeDiagramRenderer::new();

    let result = DiffDiagram {
        graph: &graph,
        renderer: &renderer,
        existing_content: "old line that will be removed",
    }
    .execute()
    .unwrap();

    assert!(!result.added.is_empty());
    assert!(!result.removed.is_empty());
}