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use map_gui::ID;
use map_model::{Map, Position};
use sim::{AgentID, Sim};
use widgetry::{GfxCtx, Key, Text};

use crate::app::App;

pub struct ObjectDebugger;

impl ObjectDebugger {
    pub fn draw(&self, g: &mut GfxCtx, app: &App) {
        if g.is_key_down(Key::LeftControl) {
            if let Some(pt) = g.canvas.get_cursor_in_map_space() {
                let mut txt = Text::new();
                txt.add_line(pt.to_string());
                txt.add_line(pt.to_gps(app.primary.map.get_gps_bounds()).to_string());
                txt.add_line(format!("{:?}", g.canvas.get_cursor()));
                txt.add_line(format!("zoom: {}", g.canvas.cam_zoom));
                txt.add_line(format!(
                    "cam_x = {}, cam_y = {}",
                    g.canvas.cam_x, g.canvas.cam_y
                ));
                if let Some(ID::Lane(l)) = app.primary.current_selection {
                    let lane = app.primary.map.get_l(l);
                    let pl = &lane.lane_center_pts;
                    if let Some((dist, _)) = pl.dist_along_of_point(pl.project_pt(pt)) {
                        txt.add_line(Position::new(l, dist).to_string());
                    }
                    txt.add_line(format!(
                        "{:?}",
                        lane.get_nearest_side_of_road(&app.primary.map)
                    ));
                }
                g.draw_mouse_tooltip(txt);
            }
        }
    }

    pub fn dump_debug(id: ID, map: &Map, sim: &Sim) {
        match id {
            ID::Lane(id) => {
                let l = map.get_l(id);
                println!("{}", abstutil::to_json(l));

                sim.debug_lane(id);

                let r = map.get_parent(id);
                println!("Parent {} ({}) points to {}", r.id, r.orig_id, r.dst_i);
                println!("{}", abstutil::to_json(r));
            }
            ID::Intersection(id) => {
                let i = map.get_i(id);
                println!("{}", abstutil::to_json(i));

                sim.debug_intersection(id, map);

                println!("{} connecting:", i.orig_id);
                for r in &i.roads {
                    let road = map.get_r(*r);
                    println!("- {} = {}", road.id, road.orig_id);
                }
            }
            ID::Building(id) => {
                println!("{}", abstutil::to_json(map.get_b(id)));
            }
            ID::ParkingLot(id) => {
                println!("{}", abstutil::to_json(map.get_pl(id)));
            }
            ID::Car(id) => {
                sim.debug_car(id);
                if let Some(t) = sim.agent_to_trip(AgentID::Car(id)) {
                    println!("Trip log for {}", t);
                    for p in sim.get_analytics().get_trip_phases(t, map) {
                        println!("- {:?}", p);
                    }
                }
            }
            ID::Pedestrian(id) => {
                sim.debug_ped(id);
                if let Some(t) = sim.agent_to_trip(AgentID::Pedestrian(id)) {
                    println!("Trip log for {}", t);
                    for p in sim.get_analytics().get_trip_phases(t, map) {
                        println!("- {:?}", p);
                    }
                }
            }
            ID::PedCrowd(members) => {
                println!("Crowd with {} members", members.len());
                for p in members {
                    sim.debug_ped(p);
                }
            }
            ID::TransitStop(id) => {
                println!("{}", abstutil::to_json(map.get_ts(id)));
            }
            ID::Area(id) => {
                println!("{}", abstutil::to_json(map.get_a(id)));
            }
            ID::Road(_) => unreachable!(),
        }
    }

    pub fn debug_json(id: ID, map: &Map, sim: &Sim) {
        let json_string = match id {
            ID::Lane(id) => abstutil::to_json(map.get_l(id)),
            ID::Intersection(id) => abstutil::to_json(map.get_i(id)),
            ID::Building(id) => abstutil::to_json(map.get_b(id)),
            ID::ParkingLot(id) => abstutil::to_json(map.get_pl(id)),
            ID::Car(id) => sim.debug_agent_json(AgentID::Car(id)),
            ID::Pedestrian(id) => sim.debug_agent_json(AgentID::Pedestrian(id)),
            // Just show the first...
            ID::PedCrowd(members) => sim.debug_agent_json(AgentID::Pedestrian(members[0])),
            ID::TransitStop(id) => abstutil::to_json(map.get_ts(id)),
            ID::Area(id) => abstutil::to_json(map.get_a(id)),
            ID::Road(_) => unreachable!(),
        };
        #[cfg(target_arch = "wasm32")]
        {
            info!("{}", json_string);
        }
        #[cfg(not(target_arch = "wasm32"))]
        {
            use std::io::Write;

            // The tempfile crate doesn't actually have a way to get the path... so just do this.
            let path = format!("{}/abst_obj.json", std::env::temp_dir().display());
            {
                let mut f = fs_err::File::create(&path).unwrap();
                writeln!(f, "{}", json_string).unwrap();
            }
            // Don't wait for the command to complet.
            // Also, https://dadroit.com/ is the best viewer I've found so far, but we can change
            // this to another or make it configurable with an environment variable or something
            // once other people use this.
            if let Err(err) = std::process::Command::new("dadroit").arg(path).spawn() {
                warn!("Couldn't launch dadroit: {}", err);
            }
        }
    }
}