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
//! contains system for player-controlled interactions
use std::cmp;
use crate::{
actions::{Action, Direction},
engine::world::World,
floor::Tile,
unit::UnitType,
Warrior,
};
/// This system defines all of the interactions that are possible for the
/// player-controlled [`Warrior`](crate::warrior::Warrior). The `play_turn`
/// method is called on [`Player`](crate::player::Player), passing a `&mut`
/// warrior whose actions must be specified.
pub fn player_system(world: &mut World) -> Vec<String> {
let mut events = Vec::new();
let (wx, wy) = world.warrior.position;
let (health, _) = world.warrior.hp;
let facing = world.warrior.facing.unwrap();
// NOTE: with the bow this range is 3 spaces
// TODO: conditionally determine warrior's range
let x_min = cmp::max(wx - 3, 0);
let x_max = cmp::min(wx + 3, world.floor.width as i32 - 1);
// include the x value with the tile enum variants
let west: Vec<(i32, Tile)> = (x_min..wx)
.rev()
.map(|i| {
let unit = world.other_units.iter_mut().find(|unit| {
let (x, _) = unit.position;
x == i
});
match unit {
Some(unit) => (i, Tile::Unit(unit.unit_type)),
_ => (i, Tile::Empty),
}
})
.collect();
// include the x value with the tile enum variants
let east: Vec<(i32, Tile)> = ((wx + 1)..=x_max)
.map(|i| {
let unit = world.other_units.iter_mut().find(|unit| {
let (x, _) = unit.position;
x == i
});
match unit {
Some(unit) => (i, Tile::Unit(unit.unit_type)),
_ => (i, Tile::Empty),
}
})
.collect();
let (ahead, behind) = match facing {
Direction::Forward => (east, west),
Direction::Backward => (west, east),
};
let warrior = Warrior::new(
world.warrior_level,
// `Vec<(i32, Tile)>` -> `Vec<Tile>`
ahead.clone().into_iter().map(|(_, t)| t).collect(),
// `Vec<(i32, Tile)>` -> `Vec<Tile>`
behind.clone().into_iter().map(|(_, t)| t).collect(),
health,
facing,
);
world.player.play_turn(&warrior);
if let Some(action) = warrior.action() {
match action {
Action::Walk(direction) => {
let target_x = if facing == direction {
// either facing Forward and walking Forward
// or facing Backward and walking Backward
wx + 1
} else {
// either facing Forward and walking Backward
// or facing Backward and walking Forward
wx - 1
};
let other_unit = world.other_units.iter().find(|unit| {
let (x, _) = unit.position;
x == target_x
});
match other_unit {
Some(unit) => {
events.push(format!(
"{warrior} bumps into {enemy:?}",
warrior = &world.player_name,
enemy = unit.unit_type
));
}
_ => {
events.push(format!(
"{warrior} walks {direction:?}",
warrior = &world.player_name,
direction = direction
));
world.warrior.position = (target_x, wy);
}
}
}
Action::Attack(direction) => {
let target_x = if facing == direction {
// either facing Forward and attacking Forward
// or facing Backward and attacking Backward
wx + 1
} else {
// either facing Forward and attacking Backward
// or facing Backward and attacking Forward
wx - 1
};
let other_unit = world.other_units.iter_mut().enumerate().find(|(_, unit)| {
let (x, _) = unit.position;
x == target_x
});
match other_unit {
Some((i, enemy)) => {
events.push(format!(
"{warrior} attacks {direction:?} and hits {enemy:?}",
warrior = &world.player_name,
direction = direction,
enemy = enemy.unit_type
));
let atk = match direction {
Direction::Forward => world.warrior.atk,
Direction::Backward => (world.warrior.atk as f32 / 2.0).ceil() as i32,
};
let (current, max) = enemy.hp;
let remaining = cmp::max(current - atk, 0);
events.push(format!(
"{enemy:?} takes {atk} damage, {remaining} HP left",
enemy = enemy.unit_type,
atk = atk,
remaining = remaining
));
enemy.hp = (remaining, max);
if remaining == 0 {
events.push(format!("{:?} is dead!", enemy.unit_type));
world.remove_unit(i);
}
}
_ => {
events.push(format!(
"{warrior} attacks {direction:?} and hits nothing",
warrior = &world.player_name,
direction = direction
));
}
}
}
Action::Rest => {
let (current, max) = world.warrior.hp;
if current < max {
let restored = if (current + 2) > max {
max - current
} else {
2
};
events.push(format!(
"{warrior} regains {restored} HP from resting! Now {remaining} HP left",
warrior = &world.player_name,
restored = restored,
remaining = current + restored
));
world.warrior.hp = (current + restored, max);
} else {
events.push(format!(
"{} rests but is already at max HP",
&world.player_name
));
};
}
Action::Rescue(direction) => {
let target_x = if facing == direction {
// either facing Forward and rescuing Forward
// or facing Backward and rescuing Backward
wx + 1
} else {
// either facing Forward and rescuing Backward
// or facing Backward and rescuing Forward
wx - 1
};
let other_unit = world.other_units.iter().enumerate().find(|(_, unit)| {
let (x, _) = unit.position;
x == target_x
});
match other_unit {
Some((i, captive)) if captive.unit_type == UnitType::Captive => {
events.push(format!(
"{warrior} frees {captive:?} from their bindings",
warrior = &world.player_name,
captive = captive.unit_type
));
events.push(format!("{:?} escapes!", captive.unit_type));
world.remove_unit(i);
}
Some((_, enemy)) => {
events.push(format!(
"{warrior} leans {direction:?} to rescue {enemy:?}, but it is not a captive!",
warrior = &world.player_name,
direction = direction,
enemy = enemy.unit_type
));
}
None => {
events.push(format!(
"{warrior} leans {direction:?} to rescue someone, but nobody is here",
warrior = &world.player_name,
direction = direction
));
}
}
}
Action::Pivot(direction) => {
events.push(format!(
"{warrior} pivots to face {direction:?}",
warrior = &world.player_name,
direction = direction
));
world.warrior.facing = Some(direction);
}
Action::Shoot(direction) => {
// find the first unit in the direction the Warrior is shooting, if one exists
let target = world.other_units.iter_mut().enumerate().find(|(_, unit)| {
let (x, _) = unit.position;
match direction {
Direction::Forward => {
matches!(ahead.iter().find(|(_, tile)| *tile != Tile::Empty), Some((target_x, _)) if *target_x == x)
}
Direction::Backward => {
matches!(behind.iter().find(|(_, tile)| *tile != Tile::Empty), Some((target_x, _)) if *target_x == x)
}
}
});
match target {
Some((i, enemy)) => {
events.push(format!(
"{warrior} lets loose an arrow {direction:?} and hits {enemy:?}",
warrior = &world.player_name,
direction = direction,
enemy = enemy.unit_type
));
let atk = (world.warrior.atk as f32 / 2.0).ceil() as i32;
let (current, max) = enemy.hp;
let remaining = cmp::max(current - atk, 0);
events.push(format!(
"{enemy:?} takes {atk} damage, {remaining} HP left",
enemy = enemy.unit_type,
atk = atk,
remaining = remaining
));
enemy.hp = (remaining, max);
if remaining == 0 {
events.push(format!("{:?} is dead!", enemy.unit_type));
world.remove_unit(i);
}
}
_ => {
events.push(format!(
"{warrior} lets loose an arrow {direction:?} and hits nothing",
warrior = &world.player_name,
direction = direction
));
}
}
}
}
}
for warning in warrior.warnings() {
events.push(warning);
}
events
}