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use std::{
io::{stdout, Write},
ops::Deref,
process,
};
use legion::prelude::*;
use crossterm::{
event::{self, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use tui::{
backend::CrosstermBackend,
layout::{Constraint, Corner, Direction, Layout},
style::Color,
widgets::{canvas::Canvas, Block, Borders, List, Widget},
Terminal,
};
use crate::{CellAccess, CellKind, CellVisibility, GameCell, GameEvents, Inventory, Player};
pub struct TuiSystem;
impl TuiSystem {
pub fn run(world: &mut World) {
let read_query = <(Read<GameCell>,)>::query();
let write_query = <(legion::query::Write<GameCell>,)>::query();
enable_raw_mode().unwrap();
let mut stdout = stdout();
execute!(stdout, EnterAlternateScreen).unwrap();
let mut terminal = Terminal::new(CrosstermBackend::new(stdout)).unwrap();
terminal.hide_cursor().unwrap();
terminal.clear().unwrap();
let term_width = terminal.size().unwrap().width;
let term_height = terminal.size().unwrap().height;
let canvas_width = term_width - 25;
let canvas_height = term_height - 8;
let player = Player::new(
(canvas_width as f64 / 2.0).round(),
(canvas_height as f64 / 2.0).round(),
);
let mut game_events = GameEvents::new();
let mut inventory = Inventory::new();
loop {
if let Event::Key(key) = event::read().unwrap() {
match key.code {
KeyCode::Up => {
let mut collided = false;
for (gamecell,) in read_query.iter_immutable(world) {
if gamecell.access() == CellAccess::Impassable
&& (player.x() - gamecell.x() as f64).abs() < 1.0
&& (player.y() - (gamecell.y() - 1) as f64).abs() < 1.0
{
game_events.post_event(
format!(
"You ran into the {}.{space:>width$}",
gamecell.name(),
space = " ",
width = canvas_width as usize / 2,
),
Color::Blue,
);
collided = true;
break;
}
}
if !collided {
write_query.par_for_each(world, {
|(mut gamecell,)| {
if gamecell.inside(
player.x() as u16 - 5,
player.y() as u16 - 5,
player.x() as u16 + 5,
player.y() as u16 + 5,
) {
gamecell.set_visible(CellVisibility::Visible);
} else if gamecell.visible() == CellVisibility::Visible {
gamecell.set_visible(CellVisibility::Dark);
}
gamecell.move_up();
}
});
}
}
KeyCode::Down => {
let mut collided = false;
for (gamecell,) in read_query.iter_immutable(world) {
if gamecell.access() == CellAccess::Impassable
&& (player.x() - gamecell.x() as f64).abs() < 1.0
&& (player.y() - (gamecell.y() + 1) as f64).abs() < 1.0
{
game_events.post_event(
format!(
"You ran into the {}.{space:>width$}",
gamecell.name(),
space = " ",
width = canvas_width as usize / 2,
),
Color::Blue,
);
collided = true;
break;
}
}
if !collided {
write_query.par_for_each(world, {
|(mut gamecell,)| {
if gamecell.inside(
player.x() as u16 - 5,
player.y() as u16 - 5,
player.x() as u16 + 5,
player.y() as u16 + 5,
) {
gamecell.set_visible(CellVisibility::Visible);
} else if gamecell.visible() == CellVisibility::Visible {
gamecell.set_visible(CellVisibility::Dark);
}
gamecell.move_down();
}
});
}
}
KeyCode::Left => {
let mut collided = false;
for (gamecell,) in read_query.iter_immutable(world) {
if gamecell.access() == CellAccess::Impassable
&& (player.x() - (gamecell.x() + 1) as f64).abs() < 1.0
&& (player.y() - gamecell.y() as f64).abs() < 1.0
{
game_events.post_event(
format!(
"You ran into the {}.{space:>width$}",
gamecell.name(),
space = " ",
width = canvas_width as usize / 2,
),
Color::Blue,
);
collided = true;
break;
}
}
if !collided {
write_query.par_for_each(world, {
|(mut gamecell,)| {
if gamecell.inside(
player.x() as u16 - 5,
player.y() as u16 - 5,
player.x() as u16 + 5,
player.y() as u16 + 5,
) {
gamecell.set_visible(CellVisibility::Visible);
} else if gamecell.visible() == CellVisibility::Visible {
gamecell.set_visible(CellVisibility::Dark);
}
gamecell.move_right();
}
});
}
}
KeyCode::Right => {
let mut collided = false;
for (gamecell,) in read_query.iter_immutable(world) {
if gamecell.access() == CellAccess::Impassable
&& (player.x() - (gamecell.x() - 1) as f64).abs() < 1.0
&& (player.y() - gamecell.y() as f64).abs() < 1.0
{
game_events.post_event(
format!(
"You ran into the {}.{space:>width$}",
gamecell.name(),
space = " ",
width = canvas_width as usize / 2,
),
Color::Blue,
);
collided = true;
break;
}
}
if !collided {
write_query.par_for_each(world, {
|(mut gamecell,)| {
if gamecell.inside(
player.x() as u16 - 5,
player.y() as u16 - 5,
player.x() as u16 + 5,
player.y() as u16 + 5,
) {
gamecell.set_visible(CellVisibility::Visible);
} else if gamecell.visible() == CellVisibility::Visible {
gamecell.set_visible(CellVisibility::Dark);
}
gamecell.move_left();
}
});
}
}
KeyCode::Char('q') => {
terminal.clear().unwrap();
terminal.show_cursor().unwrap();
disable_raw_mode().unwrap();
execute!(terminal.backend_mut(), LeaveAlternateScreen).unwrap();
process::exit(1);
}
_ => (),
}
}
let read_query = <(Read<GameCell>,)>::query();
let mut taken = None;
for (entity, (gamecell,)) in read_query.iter_entities_immutable(world) {
if gamecell.access() == CellAccess::Takeable
&& gamecell.inside(1, 1, term_width, term_height)
&& (player.x() - gamecell.x() as f64).abs() < 1.0
&& (player.y() - gamecell.y() as f64).abs() < 1.0
{
game_events.post_event(
format!(
"You now have the {}.{space:>width$}",
gamecell.name(),
space = " ",
width = canvas_width as usize / 2,
),
Color::Green,
);
inventory.take(gamecell.deref().clone());
taken = Some(entity);
break;
}
}
if let Some(entity) = taken {
world.delete(entity);
}
terminal
.draw(|mut f| {
let chunks = Layout::default()
.margin(0)
.direction(Direction::Vertical)
.constraints(
[
Constraint::Length(canvas_height + 1),
Constraint::Length(term_height - canvas_height - 2),
]
.as_ref(),
)
.split(f.size());
let top_chunks = Layout::default()
.margin(0)
.direction(Direction::Horizontal)
.constraints(
[
Constraint::Length(canvas_width + 1),
Constraint::Length(term_width - canvas_width - 2),
]
.as_ref(),
)
.split(chunks[0]);
let bottom_chunks = Layout::default()
.margin(0)
.direction(Direction::Horizontal)
.constraints(
[Constraint::Percentage(70), Constraint::Percentage(30)].as_ref(),
)
.split(chunks[1]);
Canvas::default()
.block(Block::default().borders(Borders::ALL).title("Game"))
.paint(|ctx| {
for (gamecell,) in read_query.iter_immutable(world) {
if gamecell.visible() != CellVisibility::Unvisited
&& gamecell.inside(1, 1, term_width, term_height)
{
let symbol = match gamecell.kind() {
CellKind::SoftArmor => "(",
CellKind::HardArmor => "[",
CellKind::BluntWeapon => "\\",
CellKind::EdgedWeapon => "|",
CellKind::PointedWeapon => "/",
CellKind::RangedWeapon => "}",
CellKind::ClosedDoor => "+",
CellKind::OpenedDoor => "'",
CellKind::Wall => "#",
CellKind::Floor => ".",
};
if gamecell.visible() == CellVisibility::Visible {
ctx.print(
gamecell.x() as f64,
gamecell.y() as f64,
symbol,
gamecell.color(),
);
} else {
ctx.print(
gamecell.x() as f64,
gamecell.y() as f64,
symbol,
Color::DarkGray,
);
}
}
}
ctx.print(player.x(), player.y(), "@", Color::Rgb(0, 255, 0));
})
.x_bounds([2.0, canvas_width as f64])
.y_bounds([2.0, canvas_height as f64])
.render(&mut f, top_chunks[0]);
List::new(inventory.list().into_iter())
.block(Block::default().borders(Borders::ALL).title("Inventory"))
.start_corner(Corner::TopLeft)
.render(&mut f, top_chunks[1]);
List::new(game_events.events().clone().into_iter())
.block(Block::default().borders(Borders::ALL).title("Events"))
.start_corner(Corner::TopLeft)
.render(&mut f, bottom_chunks[0]);
List::new(player.list().into_iter())
.block(Block::default().borders(Borders::ALL).title("Player"))
.start_corner(Corner::TopLeft)
.render(&mut f, bottom_chunks[1]);
})
.unwrap();
}
}
}