1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
use abstutil::Timer;
use geom::{Polygon, Pt2D};
use map_gui::ID;
use map_model::{BuildingID, NORMAL_LANE_THICKNESS};
use synthpop::{IndividTrip, PersonSpec, Scenario, TripEndpoint, TripMode, TripPurpose};
use widgetry::tools::PopupMsg;
use widgetry::{
    Choice, Color, EventCtx, GfxCtx, HorizontalAlignment, Key, Line, Outcome, Panel, Spinner,
    State, TextExt, VerticalAlignment, Widget,
};

use crate::app::{App, Transition};
use crate::common::CommonState;
use crate::debug::PathCostDebugger;

pub struct AgentSpawner {
    panel: Panel,
    start: Option<(TripEndpoint, Pt2D)>,
    // (goal, point on the map, feasible path, draw the path). Even if we can't draw the path,
    // remember if the path exists at all.
    goal: Option<(TripEndpoint, Pt2D, bool, Option<Polygon>)>,
    confirmed: bool,
}

impl AgentSpawner {
    pub fn new_state(
        ctx: &mut EventCtx,
        app: &App,
        start: Option<BuildingID>,
    ) -> Box<dyn State<App>> {
        let mut spawner = AgentSpawner {
            start: None,
            goal: None,
            confirmed: false,
            panel: Panel::new_builder(Widget::col(vec![
                Widget::row(vec![
                    Line("New trip").small_heading().into_widget(ctx),
                    ctx.style().btn_close_widget(ctx),
                ]),
                "Click a building or border to specify start"
                    .text_widget(ctx)
                    .named("instructions"),
                Widget::row(vec![
                    "Type of trip:".text_widget(ctx),
                    Widget::dropdown(
                        ctx,
                        "mode",
                        TripMode::Drive,
                        TripMode::all()
                            .into_iter()
                            .map(|m| Choice::new(m.ongoing_verb(), m))
                            .collect(),
                    ),
                ]),
                Widget::row(vec![
                    "Number of trips:".text_widget(ctx).centered_vert(),
                    Spinner::widget(ctx, "number", (1, 1000), 1, 1),
                ]),
                if app.opts.dev {
                    ctx.style()
                        .btn_plain_destructive
                        .text("Debug all costs")
                        .build_def(ctx)
                } else {
                    Widget::nothing()
                },
                ctx.style()
                    .btn_solid_primary
                    .text("Confirm")
                    .disabled(true)
                    .build_def(ctx),
            ]))
            .aligned(HorizontalAlignment::Right, VerticalAlignment::Top)
            .build(ctx),
        };
        if let Some(b) = start {
            let endpt = TripEndpoint::Building(b);
            let pt = endpt.pt(&app.primary.map);
            spawner.start = Some((endpt, pt));
            spawner.panel.replace(
                ctx,
                "instructions",
                "Click a building or border to specify end".text_widget(ctx),
            );
        }
        Box::new(spawner)
    }
}

impl State<App> for AgentSpawner {
    fn event(&mut self, ctx: &mut EventCtx, app: &mut App) -> Transition {
        match self.panel.event(ctx) {
            Outcome::Clicked(x) => match x.as_ref() {
                "close" => {
                    return Transition::Pop;
                }
                "Confirm" => {
                    let map = &app.primary.map;
                    let mut scenario = Scenario::empty(map, "one-shot");
                    let from = self.start.take().unwrap().0;
                    let to = self.goal.take().unwrap().0;
                    for _ in 0..self.panel.spinner("number") {
                        scenario.people.push(PersonSpec {
                            orig_id: None,
                            trips: vec![IndividTrip::new(
                                app.primary.sim.time(),
                                TripPurpose::Shopping,
                                from,
                                to,
                                self.panel.dropdown_value("mode"),
                            )],
                        });
                    }
                    let mut rng = app.primary.current_flags.sim_flags.make_rng();
                    app.primary.sim.instantiate(
                        &scenario,
                        map,
                        &mut rng,
                        &mut Timer::new("spawn trip"),
                    );
                    app.primary.sim.tiny_step(map, &mut app.primary.sim_cb);
                    app.recalculate_current_selection(ctx);
                    return Transition::Pop;
                }
                "Debug all costs" => {
                    if let Some(state) = self
                        .goal
                        .as_ref()
                        .and_then(|(to, _, _, _)| {
                            TripEndpoint::path_req(
                                self.start.unwrap().0,
                                *to,
                                self.panel.dropdown_value("mode"),
                                &app.primary.map,
                            )
                        })
                        .and_then(|req| app.primary.map.pathfind(req).ok())
                        .and_then(|path| {
                            path.trace(&app.primary.map).map(|pl| {
                                (
                                    path.get_req().clone(),
                                    pl.make_polygons(NORMAL_LANE_THICKNESS),
                                )
                            })
                        })
                        .and_then(|(req, draw_path)| {
                            PathCostDebugger::maybe_new(ctx, app, req, draw_path)
                        })
                    {
                        return Transition::Push(state);
                    } else {
                        return Transition::Push(PopupMsg::new_state(
                            ctx,
                            "Error",
                            vec!["Couldn't launch cost debugger for some reason"],
                        ));
                    }
                }
                _ => unreachable!(),
            },
            Outcome::Changed(_) => {
                // We need to recalculate the path to see if this is sane. Otherwise we could trick
                // a pedestrian into wandering on/off a highway border.
                if self.goal.is_some() {
                    let to = self.goal.as_ref().unwrap().0;
                    if let Some(path) = TripEndpoint::path_req(
                        self.start.unwrap().0,
                        to,
                        self.panel.dropdown_value("mode"),
                        &app.primary.map,
                    )
                    .and_then(|req| app.primary.map.pathfind(req).ok())
                    {
                        self.goal = Some((
                            to,
                            to.pt(&app.primary.map),
                            true,
                            path.trace(&app.primary.map)
                                .map(|pl| pl.make_polygons(NORMAL_LANE_THICKNESS)),
                        ));
                    } else {
                        self.goal = None;
                        self.confirmed = false;
                        self.panel.replace(
                            ctx,
                            "instructions",
                            "Click a building or border to specify end".text_widget(ctx),
                        );
                        self.panel.replace(
                            ctx,
                            "Confirm",
                            ctx.style()
                                .btn_solid_primary
                                .text("Confirm")
                                .disabled(true)
                                .build_def(ctx),
                        );
                    }
                }
            }
            _ => {}
        }

        ctx.canvas_movement();
        let map = &app.primary.map;

        if self.confirmed {
            return Transition::Keep;
        }

        if ctx.redo_mouseover() {
            app.primary.current_selection = app.mouseover_unzoomed_everything(ctx);
            if match app.primary.current_selection {
                Some(ID::Intersection(i)) => !map.get_i(i).is_border(),
                Some(ID::Building(_)) => false,
                _ => true,
            } {
                app.primary.current_selection = None;
            }
        }
        if let Some(hovering) = match app.primary.current_selection {
            Some(ID::Intersection(i)) => Some(TripEndpoint::Border(i)),
            Some(ID::Building(b)) => Some(TripEndpoint::Building(b)),
            None => None,
            _ => unreachable!(),
        } {
            if self.start.is_none() && app.per_obj.left_click(ctx, "start here") {
                self.start = Some((hovering, hovering.pt(map)));
                self.panel.replace(
                    ctx,
                    "instructions",
                    "Click a building or border to specify end".text_widget(ctx),
                );
            } else if self.start.is_some() && self.start.map(|(x, _)| x != hovering).unwrap_or(true)
            {
                if self
                    .goal
                    .as_ref()
                    .map(|(to, _, _, _)| to != &hovering)
                    .unwrap_or(true)
                {
                    if let Some(path) = TripEndpoint::path_req(
                        self.start.unwrap().0,
                        hovering,
                        self.panel.dropdown_value("mode"),
                        map,
                    )
                    .and_then(|req| map.pathfind(req).ok())
                    {
                        self.goal = Some((
                            hovering,
                            hovering.pt(map),
                            true,
                            path.trace(map)
                                .map(|pl| pl.make_polygons(NORMAL_LANE_THICKNESS)),
                        ));
                    } else {
                        // Don't constantly recalculate a failed path
                        self.goal = Some((hovering, hovering.pt(map), false, None));
                    }
                }

                if self.goal.as_ref().map(|(_, _, ok, _)| *ok).unwrap_or(false)
                    && app.per_obj.left_click(ctx, "end here")
                {
                    app.primary.current_selection = None;
                    self.confirmed = true;
                    self.panel.replace(
                        ctx,
                        "instructions",
                        "Confirm the trip settings".text_widget(ctx),
                    );
                    self.panel.replace(
                        ctx,
                        "Confirm",
                        ctx.style()
                            .btn_solid_primary
                            .text("Confirm")
                            .hotkey(Key::Enter)
                            .build_def(ctx),
                    );
                }
            }
        } else {
            self.goal = None;
        }

        Transition::Keep
    }

    fn draw(&self, g: &mut GfxCtx, app: &App) {
        self.panel.draw(g);
        CommonState::draw_osd(g, app);

        if let Some((_, center)) = self.start {
            map_gui::tools::start_marker(g, center, 2.0).draw(g);
        }
        if let Some((_, center, _, ref path_poly)) = self.goal {
            map_gui::tools::goal_marker(g, center, 2.0).draw(g);
            if let Some(p) = path_poly {
                g.draw_polygon(Color::PURPLE, p.clone());
            }
        }
    }
}