BREP_app 0.2.1

//! Interference results window (assemblies build-spec §9) — the floating
//! window behind the Assembly workbench's `∩` toolbar button.
//!
//! Follows the pinned Info-window idiom: a movable + resizable
//! [`egui::Window`] drawn at ctx level, owning its own state (the last
//! [`InterferenceReport`]). The check itself lives in the ENGINE
//! ([`EngineState::interference_check`] — main-side, non-destructive,
//! bbox-prefiltered); this panel only renders the report:
//!
//! * a row per INTERFERING pair — `ACOMP1 × ACOMP3 — 12.4 mm³` — clicking it
//!   selects/highlights BOTH components (emphasis over their member solids);
//!   a hidden participant is noted on its row (it still participated —
//!   interference is a physical question);
//! * a green all-clear line when nothing interferes (a PASS state, shown
//!   positively);
//! * explicit `unverified` (boolean refused) and `skipped` (budget / no
//!   geometry) sections — nothing is ever dropped silently;
//! * a Re-run button.
//!
//! Colors come from the ONE assembly status map
//! ([`brep_render::assembly_status`]) and volumes from the ONE measurement
//! formatter ([`super::info_windows::num`]) — no re-rolled styling.

use brep_render::assembly_status;
use brep_render::engine_state::{EngineState, InterferencePair, InterferenceReport};
use eframe::egui;
use serde_json::Value;
use std::collections::HashMap;

/// The row/line label of one interfering pair: `A × B — 12.4 mm³`, with a
/// `(hidden: …)` note when a participant is currently invisible.
fn pair_label(pair: &InterferencePair) -> String {
    let mut label = format!(
        "{} \u{00d7} {} \u{2014} {} mm\u{00b3}",
        pair.a,
        pair.b,
        super::info_windows::num(pair.volume)
    );
    let hidden: Vec<&str> = [
        pair.a_hidden.then_some(pair.a.as_str()),
        pair.b_hidden.then_some(pair.b.as_str()),
    ]
    .into_iter()
    .flatten()
    .collect();
    if !hidden.is_empty() {
        label.push_str(&format!(" (hidden: {})", hidden.join(", ")));
    }
    label
}

/// An [`egui::Color32`] off the shared status palette.
fn status_color(status: &str) -> egui::Color32 {
    let [r, g, b] = assembly_status::status_color_rgb(status);
    egui::Color32::from_rgb(r, g, b)
}

/// The shell-owned interference results window. Opened (and run) by the
/// Assembly workbench's toolbar button; re-run from its own button. Owns the
/// last report — the engine holds no window state.
#[derive(Default)]
pub struct InterferenceWindow {
    open: bool,
    report: Option<InterferenceReport>,
    /// Per-frame interactive-widget screen rects for the headed verifier.
    hits: HashMap<String, egui::Rect>,
}

impl InterferenceWindow {
    pub fn new() -> Self {
        Self::default()
    }

    /// The toolbar entry point: run the check NOW and show the window.
    pub fn open_and_run(&mut self, state: &mut EngineState) {
        self.report = Some(state.interference_check());
        self.open = true;
    }

    /// Draw the window (if open) at ctx level, like the Info windows.
    pub fn show(&mut self, ctx: &egui::Context, state: &mut EngineState) {
        self.hits.clear();
        if !self.open {
            return;
        }
        let mut open = true;
        egui::Window::new("Interference")
            .id(egui::Id::new("brep-interference-window"))
            .open(&mut open)
            .movable(true)
            .resizable(true)
            .default_size([360.0, 320.0])
            .default_pos([860.0, 80.0])
            .show(ctx, |ui| {
                egui::ScrollArea::vertical()
                    .auto_shrink([false, false])
                    .show(ui, |ui| self.body(ui, state));
            });
        self.open = open;
    }

    fn body(&mut self, ui: &mut egui::Ui, state: &mut EngineState) {
        // Header: the summary + Re-run.
        ui.horizontal(|ui| {
            let rerun = ui.button("Re-run");
            self.hits.insert("interference:rerun".into(), rerun.rect);
            if rerun.clicked() {
                self.report = Some(state.interference_check());
            }
            if let Some(report) = &self.report {
                ui.weak(format!(
                    "{} components \u{00b7} {} pairs \u{00b7} {} boolean{}",
                    report.component_count,
                    report.pair_total,
                    report.booleans_run,
                    if report.booleans_run == 1 { "" } else { "s" }
                ));
            }
        });
        ui.separator();

        let Some(report) = self.report.clone() else {
            ui.weak("Run the check from the toolbar.");
            return;
        };
        if report.component_count < 2 {
            ui.weak("Needs at least two components.");
            return;
        }

        if report.pairs.is_empty() {
            // The PASS state, shown positively (green — the shared palette's
            // `satisfied`). Refusals/skips below still temper it.
            ui.colored_label(
                status_color("satisfied"),
                format!(
                    "\u{2713} No interference \u{2014} {} pair{} checked",
                    report.pair_total,
                    if report.pair_total == 1 { "" } else { "s" }
                ),
            );
        } else {
            for pair in &report.pairs {
                // A clickable row: selecting it highlights BOTH participants
                // (emphasis over the union of their member solids).
                let row = ui.selectable_label(
                    false,
                    egui::RichText::new(pair_label(pair)).color(status_color("error")),
                );
                self.hits
                    .insert(format!("interference:pair:{}x{}", pair.a, pair.b), row.rect);
                if row.clicked() {
                    state.select_components(&[pair.a.clone(), pair.b.clone()]);
                }
            }
        }

        // Never-silent sections: boolean refusals and skipped work.
        if !report.unverified.is_empty() {
            ui.add_space(4.0);
            ui.label("Not verified (boolean refused):");
            for line in &report.unverified {
                ui.colored_label(status_color("unsupported-selection"), line);
            }
        }
        if !report.skipped.is_empty() {
            ui.add_space(4.0);
            ui.label("Not checked:");
            for line in &report.skipped {
                ui.weak(line);
            }
        }
    }

    /// The window's logical state for the headed verifier
    /// (`__brepInterference`): `{open, report: {…} | null}`.
    #[cfg_attr(not(target_arch = "wasm32"), allow(dead_code))]
    pub fn state_json(&self) -> String {
        let report = self.report.as_ref().map(|report| {
            serde_json::json!({
                "componentCount": report.component_count,
                "pairTotal": report.pair_total,
                "booleansRun": report.booleans_run,
                "pairs": report
                    .pairs
                    .iter()
                    .map(|pair| {
                        serde_json::json!({
                            "a": pair.a,
                            "b": pair.b,
                            "volume": pair.volume,
                            "aHidden": pair.a_hidden,
                            "bHidden": pair.b_hidden,
                            "label": pair_label(pair),
                        })
                    })
                    .collect::<Vec<_>>(),
                "skipped": report.skipped,
                "unverified": report.unverified,
            })
        });
        serde_json::json!({
            "open": self.open,
            "report": report.unwrap_or(Value::Null),
        })
        .to_string()
    }

    /// Per-frame widget rects (`interference:rerun`, `interference:pair:AxB`)
    /// for the headed verifier.
    #[cfg_attr(not(target_arch = "wasm32"), allow(dead_code))]
    pub fn hits_json(&self) -> String {
        let mut map = serde_json::Map::new();
        for (key, rect) in &self.hits {
            map.insert(
                key.clone(),
                serde_json::json!([rect.min.x, rect.min.y, rect.width(), rect.height()]),
            );
        }
        Value::Object(map).to_string()
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use brep_render::engine_state::ComponentInsert;

    /// A one-cube part document (10 mm cube `Part` — the insert-flow payload).
    fn part_document() -> String {
        serde_json::json!({
            "expressions": "",
            "configurator": {},
            "features": [{
                "type": "P.CU",
                "inputParams": {
                    "id": "Part",
                    "sizeX": 10.0, "sizeY": 10.0, "sizeZ": 10.0,
                    "transform": {
                        "position": [0.0, 0.0, 0.0],
                        "rotationEuler": [0.0, 0.0, 0.0],
                        "scale": [1.0, 1.0, 1.0]
                    },
                    "boolean": { "targets": [], "operation": "NONE" }
                },
                "persistentData": {}
            }]
        })
        .to_string()
    }

    /// Two 10 mm cube instances via the REAL insert flow, the second moved to
    /// `translate` (the assembly_ops test idiom).
    fn two_cube_state(translate: [f64; 3]) -> EngineState {
        brep_render::brep_kernel::clear_history_cache();
        let mut state = EngineState::new();
        state
            .insert_component(ComponentInsert::New {
                name: "cube",
                source_key: "cube",
                source_signature: "sig-1",
                document_json: &part_document(),
            })
            .expect("insert 1");
        state
            .insert_component(ComponentInsert::Existing { part_name: "cube" })
            .expect("insert 2");
        let mut params = state
            .history
            .feature_params(state.history.index_of("ACOMP2").unwrap())
            .unwrap();
        params["transform"]["translate"] = serde_json::json!(translate);
        state
            .update_feature_params("ACOMP2", &params.to_string())
            .expect("move ACOMP2");
        state
    }

    /// One headless egui frame of the window (the panel test idiom).
    fn run_frame(
        ctx: &egui::Context,
        window: &mut InterferenceWindow,
        state: &mut EngineState,
        events: Vec<egui::Event>,
    ) {
        let raw = egui::RawInput {
            screen_rect: Some(egui::Rect::from_min_size(
                egui::pos2(0.0, 0.0),
                egui::vec2(1280.0, 800.0),
            )),
            events,
            ..Default::default()
        };
        let _ = ctx.run_ui(raw, |ui| {
            let _ = ui; // the window draws at ctx level
            window.show(ctx, state);
        });
    }

    /// Left-click at `pos`: hover frame + press frame, then a release frame
    /// (the assembly-structure `click_at` idiom).
    fn click_at(
        ctx: &egui::Context,
        window: &mut InterferenceWindow,
        state: &mut EngineState,
        pos: egui::Pos2,
    ) {
        run_frame(
            ctx,
            window,
            state,
            vec![
                egui::Event::PointerMoved(pos),
                egui::Event::PointerButton {
                    pos,
                    button: egui::PointerButton::Primary,
                    pressed: true,
                    modifiers: egui::Modifiers::default(),
                },
            ],
        );
        run_frame(
            ctx,
            window,
            state,
            vec![egui::Event::PointerButton {
                pos,
                button: egui::PointerButton::Primary,
                pressed: false,
                modifiers: egui::Modifiers::default(),
            }],
        );
    }

    #[test]
    fn labels_read_pair_volume_and_hidden_note() {
        let pair = |hidden: (bool, bool)| InterferencePair {
            a: "ACOMP1".into(),
            b: "ACOMP3".into(),
            volume: 12.4,
            a_hidden: hidden.0,
            b_hidden: hidden.1,
        };
        assert_eq!(
            pair_label(&pair((false, false))),
            "ACOMP1 \u{00d7} ACOMP3 \u{2014} 12.4 mm\u{00b3}"
        );
        assert_eq!(
            pair_label(&pair((false, true))),
            "ACOMP1 \u{00d7} ACOMP3 \u{2014} 12.4 mm\u{00b3} (hidden: ACOMP3)"
        );
        assert_eq!(
            pair_label(&pair((true, true))),
            "ACOMP1 \u{00d7} ACOMP3 \u{2014} 12.4 mm\u{00b3} (hidden: ACOMP1, ACOMP3)"
        );
    }

    /// The toolbar entry point runs the ENGINE check and the published state
    /// carries the interfering pair with its exact volume; the all-clear case
    /// publishes an empty pair list over the same report shape.
    #[test]
    fn open_and_run_publishes_the_report() {
        let mut state = two_cube_state([5.0, 0.0, 0.0]);
        let mut window = InterferenceWindow::new();
        assert_eq!(
            serde_json::from_str::<Value>(&window.state_json()).unwrap()["report"],
            Value::Null,
            "no report before the first run"
        );
        window.open_and_run(&mut state);
        let published: Value = serde_json::from_str(&window.state_json()).unwrap();
        assert_eq!(published["open"], true);
        let report = &published["report"];
        assert_eq!(report["componentCount"], 2);
        assert_eq!(report["pairTotal"], 1);
        assert_eq!(report["pairs"][0]["a"], "ACOMP1");
        assert_eq!(report["pairs"][0]["b"], "ACOMP2");
        assert!((report["pairs"][0]["volume"].as_f64().unwrap() - 500.0).abs() < 1e-6);
        assert_eq!(
            report["pairs"][0]["label"],
            "ACOMP1 \u{00d7} ACOMP2 \u{2014} 500 mm\u{00b3}"
        );

        // All-clear: separated cubes → empty pairs, pass state.
        let mut state = two_cube_state([40.0, 0.0, 0.0]);
        let mut window = InterferenceWindow::new();
        window.open_and_run(&mut state);
        let published: Value = serde_json::from_str(&window.state_json()).unwrap();
        assert_eq!(published["report"]["pairs"], serde_json::json!([]));
        assert_eq!(published["report"]["booleansRun"], 0, "prefiltered");
    }

    /// Clicking a pair row selects BOTH participants (emphasis over the union
    /// of their member solids) through a real egui click.
    #[test]
    fn pair_row_click_selects_both_components() {
        let ctx = egui::Context::default();
        let mut state = two_cube_state([5.0, 0.0, 0.0]);
        let mut window = InterferenceWindow::new();
        window.open_and_run(&mut state);

        // Two settle frames: the window's first-frame placement may still be
        // constrained/sized; read the rects only once the layout is stable.
        run_frame(&ctx, &mut window, &mut state, vec![]);
        run_frame(&ctx, &mut window, &mut state, vec![]);
        let row = *window
            .hits
            .get("interference:pair:ACOMP1xACOMP2")
            .expect("pair row rect");
        click_at(&ctx, &mut window, &mut state, row.center());
        assert!(
            state.emphasis.selected_solids.contains("ACOMP1:Part")
                && state.emphasis.selected_solids.contains("ACOMP2:Part"),
            "row click highlights BOTH participants"
        );
    }

    /// The Re-run button reflects engine changes: hide a participant, re-run,
    /// and the pair is flagged hidden in the published state.
    #[test]
    fn rerun_picks_up_hidden_participants() {
        let ctx = egui::Context::default();
        let mut state = two_cube_state([5.0, 0.0, 0.0]);
        let mut window = InterferenceWindow::new();
        window.open_and_run(&mut state);
        assert!(state.scene.set_visible("ACOMP2:Part", false));

        run_frame(&ctx, &mut window, &mut state, vec![]);
        run_frame(&ctx, &mut window, &mut state, vec![]);
        let rerun = *window.hits.get("interference:rerun").expect("rerun rect");
        click_at(&ctx, &mut window, &mut state, rerun.center());
        let published: Value = serde_json::from_str(&window.state_json()).unwrap();
        let pair = &published["report"]["pairs"][0];
        assert_eq!(pair["bHidden"], true, "hidden participant flagged: {pair}");
        assert!(
            pair["label"].as_str().unwrap().contains("(hidden: ACOMP2)"),
            "{pair}"
        );
    }
}