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|
use super::traits::{Game, GameState};
use crate::client::view::{SlotsPhase, SlotsView};
use crate::slots::{LINE_NAMES, REELS, ROWS, paytable_lines};
/// Height of the game board. It must never depend on the spin result.
pub const SLOT_BOARD_LINES: usize = 10;
pub struct SlotsGame;
impl SlotsGame {
pub fn new() -> Self {
Self
}
fn cell(chars: &[char], row: usize, col: usize, winning: &[usize]) -> String {
let symbol = if chars.len() == REELS * ROWS {
chars.get(col * ROWS + row).copied().unwrap_or('?')
} else if chars.len() == 3 && row == 0 {
// Legacy 3-symbol server: degrade to the first row.
chars.get(col).copied().unwrap_or('?')
} else {
'?'
};
if winning.contains(&(col * ROWS + row)) {
format!("{{ {} }}", symbol)
} else {
format!("[ {} ]", symbol)
}
}
fn render_grid(reels: &[char], winning: &[usize]) -> [String; ROWS] {
std::array::from_fn(|row| {
(0..REELS)
.map(|col| Self::cell(reels, row, col, winning))
.collect::<Vec<_>>()
.join(" ")
})
}
fn render_status(view: &SlotsView) -> String {
if let Some(error) = &view.error {
return format!("ERROR: {error}");
}
match view.phase {
SlotsPhase::Spinning => "Spinning...".to_string(),
SlotsPhase::Result => {
let winnings = view.winnings.unwrap_or(0);
if winnings == 0 {
return "No win.".to_string();
}
match view.win_type.as_str() {
"mega" => format!("MEGA WIN! {winnings} Kr"),
"big" => format!("BIG WIN! {winnings} Kr"),
_ => format!("Won {winnings} Kr"),
}
}
SlotsPhase::Ready => "Press [SPACE] to spin!".to_string(),
}
}
fn render_win_lines(view: &SlotsView) -> String {
if view.phase != SlotsPhase::Result || view.win_lines.is_empty() {
return String::new();
}
let named: Vec<String> = view
.win_lines
.iter()
.map(|line| {
let name = line
.checked_sub(1)
.and_then(|index| LINE_NAMES.get(index))
.copied();
match name {
Some(name) => format!("{line} ({name})"),
None => line.to_string(),
}
})
.collect();
format!("Winning lines: {}", named.join(", "))
}
/// Render a slots view to terminal lines. The GUI paints the same view.
pub fn render_view(view: &SlotsView) -> String {
let balance = view
.balance
.map(|balance| balance.to_string())
.unwrap_or_else(|| "?".to_string());
let grid = Self::render_grid(&view.reels, &view.win_cells);
let paytable = paytable_lines();
format!(
"=== SLOTS ===\r\nBet: {} Kr Balance: {} Kr\r\n{}\r\n{}\r\n{}\r\n{}\r\n{}\r\n{}\r\n{}\r\n[+/-] Bet [SPACE] Spin [Q] Quit",
view.bet,
balance,
grid[0],
grid[1],
grid[2],
paytable[0],
paytable[1],
Self::render_status(view),
Self::render_win_lines(view)
)
}
}
impl Game for SlotsGame {
fn get_name(&self) -> &'static str {
"Slots"
}
fn render(&self, state: &GameState) -> String {
Self::render_view(&SlotsView::from_state(state))
}
fn render_lines(&self, _state: &GameState) -> usize {
SLOT_BOARD_LINES
}
fn get_help(&self) -> String {
"SLOTS GAME\n\
=========\n\
5 reels x 3 rows, 5 paylines.\n\
A win needs 3, 4 or 5 matching symbols from reel 1 on a payline.\n\
\n\
Payout = total bet x symbol x shape\n\
Symbols: C=1 L=2 O=3 G=4 D=6 S=10\n\
Shapes: 3 of a kind=1, 4 of a kind=3, 5 of a kind=14\n\
\n\
Lines: 1 top, 2 middle, 3 bottom, 4 V, 5 inverted V\n\
Multiple winning lines are added together.\n\
\n\
Symbols: C=Cherry, L=Lemon, O=Orange, G=Grapes, D=Diamond, S=Seven\n\
\n\
Controls:\n\
SPACE - Spin the reels\n\
+ or = - Increase total bet\n\
- - Decrease total bet\n\
Q - Exit the game"
.to_string()
}
}
|
