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use crate::constants;
use bevy::prelude::*;
use bevy::utils::Duration;
use rand::{
distributions::{Distribution, Standard},
Rng,
};
#[derive(Component)]
pub struct AnimationTimer {
timer: Timer,
}
impl AnimationTimer {
pub fn from_seconds(duration: f32, mode: TimerMode) -> AnimationTimer {
AnimationTimer {
timer: Timer::from_seconds(duration, mode),
}
}
pub fn finished(&self) -> bool {
self.timer.finished()
}
pub fn tick(&mut self, delta: Duration) -> &Timer {
self.timer.tick(delta)
}
pub fn just_finished(&self) -> bool {
self.timer.just_finished()
}
pub fn reset(&mut self) {
self.timer.reset();
}
pub fn set_duration(&mut self, duration: Duration) {
self.timer.set_duration(duration);
}
pub fn repeating(&self) -> bool {
self.timer.mode() == TimerMode::Repeating
}
}
#[derive(Debug, PartialEq, Clone, Copy, Default)]
pub enum Occupant {
#[default]
None,
Green,
Yellow,
Red,
Blue,
Purple,
Explosion,
}
impl Occupant {
pub fn to_index(&self) -> usize {
match self {
Occupant::Green => constants::TILESHEET_GREEN,
Occupant::Yellow => constants::TILESHEET_YELLOW,
Occupant::Red => constants::TILESHEET_RED,
Occupant::Blue => constants::TILESHEET_BLUE,
Occupant::Purple => constants::TILESHEET_PURPLE,
Occupant::Explosion => constants::TILESHEET_EXPLOSION1,
Occupant::None => 0,
}
}
}
impl Distribution<Occupant> for Standard {
fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> Occupant {
match rng.gen_range(0..=4) {
0 => Occupant::Green,
1 => Occupant::Yellow,
2 => Occupant::Blue,
3 => Occupant::Red,
4 => Occupant::Purple,
_ => Occupant::None,
}
}
}
#[derive(Debug, Clone, Default, Copy, Component)]
pub struct Cell {
pub x: usize,
pub y: usize,
pub occupant: Occupant,
pub selected: bool,
pub hovered: bool,
}
impl Cell {
pub fn new(x: usize, y: usize) -> Cell {
Cell {
x,
y,
occupant: Occupant::None,
selected: false,
hovered: false,
}
}
pub fn set_occupant(&mut self, occupant: Occupant, sprite: &mut TextureAtlasSprite) {
self.occupant = occupant;
sprite.index = self.occupant.to_index();
}
}
pub fn insert(mut q: Query<(&mut Cell, &mut TextureAtlasSprite)>) {
for (mut cell, mut sprite) in q.iter_mut() {
if cell.occupant == Occupant::None && cell.y == constants::GRID_SIZE - 1 {
cell.set_occupant(rand::random(), &mut sprite);
}
}
}
pub fn start_explosion(
mut commands: Commands,
mut q: Query<(Entity, &Cell), Without<AnimationTimer>>,
) {
for (entity, cell) in q.iter_mut() {
if cell.occupant == Occupant::Explosion {
commands
.entity(entity)
.insert(AnimationTimer::from_seconds(0.1, TimerMode::Repeating));
}
}
}
pub fn check(mut q: Query<(&mut Cell, &mut TextureAtlasSprite)>) {
let mut cells = [[Cell::default(); constants::GRID_SIZE]; constants::GRID_SIZE];
for (cell, _) in q.iter_mut() {
cells[cell.x][cell.y] = *cell;
}
let mut last = Occupant::None;
let mut connected = Vec::new();
for (i, row) in cells.iter().enumerate() {
let mut c = Vec::new();
for (j, _) in row.iter().enumerate() {
if cells[i][j].occupant == last && last != Occupant::None && last != Occupant::Explosion
{
c.push((i, j));
c.push((i, j - 1));
} else {
connected.push(c.clone());
c.clear();
}
last = cells[i][j].occupant;
}
connected.push(c);
last = Occupant::None;
}
for (i, row) in cells.iter().enumerate() {
let mut c = Vec::new();
for (j, _) in row.iter().enumerate() {
if cells[j][i].occupant == last && last != Occupant::None && last != Occupant::Explosion
{
c.push((j, i));
c.push((j - 1, i));
} else {
connected.push(c.clone());
c.clear();
}
last = cells[j][i].occupant;
}
connected.push(c);
last = Occupant::None;
}
connected.retain(|c| c.len() > 4);
for c in connected.iter() {
for (i, j) in c.iter() {
for (mut cell, mut sprite) in q.iter_mut() {
if &cell.x == i && &cell.y == j && cell.occupant != Occupant::Explosion {
cell.set_occupant(Occupant::Explosion, &mut sprite);
}
}
}
}
}
pub fn falling(mut q: Query<(&mut Cell, &mut TextureAtlasSprite)>) {
let mut have_gems = Vec::new();
for (cell, _sprite) in q.iter_mut() {
if cell.occupant != Occupant::None {
have_gems.push(*cell);
}
}
let mut moved_gems = Vec::new();
for (mut cell, mut sprite) in q.iter_mut() {
if cell.occupant == Occupant::None {
if let Some(c) = have_gems
.iter()
.find(|&c| (c.x, c.y) == (cell.x, cell.y + 1))
{
cell.set_occupant(c.occupant, &mut sprite);
moved_gems.push(c);
}
}
}
for (mut cell, mut sprite) in q.iter_mut() {
if moved_gems.iter().any(|c| (c.x, c.y) == (cell.x, cell.y)) {
cell.set_occupant(Occupant::None, &mut sprite);
}
}
}
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