use crate::helpers::ID;
use crate::render::DrawMap;
use crate::ui::UI;
use ezgui::{EventCtx, GfxCtx, Key, Line, Text};
use map_model::{Map, PathConstraints};
use sim::{AgentID, CarID, Sim};

pub struct ObjectDebugger {
    debug_tooltip_key_held: bool,
}

impl ObjectDebugger {
    pub fn new() -> ObjectDebugger {
        ObjectDebugger {
            debug_tooltip_key_held: false,
        }
    }

    pub fn event(&mut self, ctx: &mut EventCtx, ui: &UI) {
        if self.debug_tooltip_key_held {
            self.debug_tooltip_key_held = !ctx.input.key_released(Key::RightControl);
        } else {
            self.debug_tooltip_key_held = ctx
                .input
                .unimportant_key_pressed(Key::RightControl, "hold to show debug tooltips");
        }

        if let Some(ref id) = ui.primary.current_selection {
            if ui.per_obj.action(ctx, Key::D, "debug") {
                dump_debug(
                    id.clone(),
                    &ui.primary.map,
                    &ui.primary.sim,
                    &ui.primary.draw_map,
                );
            }
        }
    }

    pub fn draw(&self, g: &mut GfxCtx, ui: &UI) {
        if self.debug_tooltip_key_held {
            if let Some(pt) = g.canvas.get_cursor_in_map_space() {
                if let Some(gps) = pt.to_gps(ui.primary.map.get_gps_bounds()) {
                    let mut txt = Text::new().with_bg();
                    txt.add(Line(pt.to_string()));
                    txt.add(Line(gps.to_string()));
                    txt.add(Line(format!("{:?}", g.canvas.get_cursor_in_screen_space())));
                    txt.add(Line(format!("zoom: {}", g.canvas.cam_zoom)));
                    g.draw_mouse_tooltip(&txt);
                }
            }
        }
    }
}

fn dump_debug(id: ID, map: &Map, sim: &Sim, draw_map: &DrawMap) {
    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);

            if l.lane_type.is_for_moving_vehicles() {
                for constraint in vec![
                    PathConstraints::Car,
                    PathConstraints::Bike,
                    PathConstraints::Bus,
                ] {
                    if constraint.can_use(l, map) {
                        println!(
                            "Cost for {:?}: {}",
                            constraint,
                            l.get_max_cost(constraint, map)
                        );
                    }
                }
            }
        }
        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::Turn(id) => {
            println!("{}", abstutil::to_json(map.get_t(id)));
        }
        ID::Building(id) => {
            println!("{}", abstutil::to_json(map.get_b(id)));
            for (cars, descr) in vec![
                (
                    sim.get_parked_cars_by_owner(id),
                    format!("currently parked cars are owned by {}", id),
                ),
                (
                    sim.get_offstreet_parked_cars(id),
                    format!("cars are parked inside {}", id),
                ),
            ] {
                println!(
                    "{} {}: {:?}",
                    cars.len(),
                    descr,
                    cars.iter().map(|p| p.vehicle.id).collect::<Vec<CarID>>()
                );
            }
        }
        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.describe(sim.time()));
                }
            }
        }
        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.describe(sim.time()));
                }
            }
        }
        ID::PedCrowd(members) => {
            println!("Crowd with {} members", members.len());
            for p in members {
                sim.debug_ped(p);
            }
        }
        ID::ExtraShape(id) => {
            let es = draw_map.get_es(id);
            for (k, v) in &es.attributes {
                println!("{} = {}", k, v);
            }
            println!("associated road: {:?}", es.road);
        }
        ID::BusStop(id) => {
            println!("{}", abstutil::to_json(map.get_bs(id)));
        }
        ID::Area(id) => {
            println!("{}", abstutil::to_json(map.get_a(id)));
        }
        ID::Road(_) | ID::Trip(_) => unreachable!(),
    }
}