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use crate::{
gui::util,
model::{card::Card, difficulty, difficulty::Difficulty},
util::event::{Event, Events},
util::serialization,
};
use anyhow::Result;
use termion::event::Key;
use tui::{
backend::Backend,
layout::{Alignment, Constraint, Direction, Layout},
style::{Color, Modifier, Style},
text::{Span, Spans, Text},
widgets::{Block, Borders, Paragraph, Wrap},
Terminal,
};
struct State {
pub input: String,
pub answer: Answer,
}
enum Answer {
Write,
Difficulty { difficulty: Difficulty },
}
pub fn ask<B: Backend>(
terminal: &mut Terminal<B>,
events: &Events,
title: &str,
card: &Card,
) -> Result<Difficulty> {
let mut state = State {
input: String::new(),
answer: Answer::Write,
};
loop {
terminal.draw(|f| {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints(
[
Constraint::Length(1),
Constraint::Percentage(30),
Constraint::Length(5),
Constraint::Percentage(30),
Constraint::Length(5),
]
.as_ref(),
)
.split(f.size());
let d1 = util::title(title);
f.render_widget(d1, chunks[0]);
let question = Paragraph::new(util::center_vertically(chunks[1], &card.question))
.style(match state.answer {
Answer::Write => {
if state.input.is_empty() {
Style::default().fg(Color::Yellow)
} else {
Style::default()
}
}
_ => Style::default(),
})
.alignment(Alignment::Center);
f.render_widget(question, chunks[1]);
let answer = Paragraph::new(util::center_vertically(chunks[2], &state.input))
.style(match state.answer {
Answer::Write => Style::default(),
Answer::Difficulty { difficulty: _ } => {
if is_correct(&state.input, &card.responses) {
Style::default().fg(Color::Green)
} else {
Style::default().fg(Color::Red)
}
}
})
.alignment(Alignment::Center)
.block(Block::default().borders(Borders::ALL).title("Réponse"))
.wrap(Wrap { trim: true });
f.render_widget(answer, chunks[2]);
if let Answer::Difficulty {
difficulty: selected,
} = state.answer
{
if !is_correct(&state.input, &card.responses) || card.responses.len() > 1 {
let paragraph = Paragraph::new(util::center_vertically(
chunks[3],
&serialization::words_to_line(&card.responses),
))
.alignment(Alignment::Center);
f.render_widget(paragraph, chunks[3]);
};
let difficulties = card.state.difficulties();
let l = difficulties.len();
let sep = Span::styled(" • ", Style::default());
let tabs = difficulties
.iter()
.enumerate()
.map(|(i, d)| {
let style = if *d == selected {
Style::default()
.fg(Color::Yellow)
.add_modifier(Modifier::UNDERLINED)
} else {
Style::default().add_modifier(Modifier::DIM)
};
let d = Span::styled(difficulty::label(*d), style);
if i < l - 1 {
[d, sep.clone()].to_vec()
} else {
[d].to_vec()
}
})
.collect::<Vec<Vec<Span>>>()
.concat();
let p = Paragraph::new(Text::from(Spans::from(tabs))).alignment(Alignment::Center);
f.render_widget(p, chunks[4]);
}
})?;
if let Event::Input(key) = events.next()? {
match state.answer {
Answer::Write => match key {
Key::Char('\n') => {
let difficulty = if is_correct(&state.input, &card.responses) {
Difficulty::Good
} else {
Difficulty::Again
};
state.answer = Answer::Difficulty { difficulty }
}
Key::Char(c) => {
state.input.push(c);
}
Key::Backspace => {
state.input.pop();
}
_ => {}
},
Answer::Difficulty {
difficulty: selected,
} => match key {
Key::Left => {
for d in relative_element(&card.state.difficulties(), &selected, -1).iter()
{
state.answer = Answer::Difficulty { difficulty: *d }
}
}
Key::Right => {
for d in relative_element(&card.state.difficulties(), &selected, 1).iter() {
state.answer = Answer::Difficulty { difficulty: *d }
}
}
Key::Char('\n') => return Ok(selected),
_ => {}
},
}
}
}
}
fn is_correct(input: &str, responses: &[String]) -> bool {
responses
.iter()
.map(|r| r.split('(').collect::<Vec<&str>>()[0].trim())
.any(|x| x == input)
}
fn relative_element<T: Clone + PartialEq>(xs: &[T], x: &T, ri: i32) -> Option<T> {
let i = xs.iter().position(|t| t == x)? as i32 + ri;
if i >= 0 && i < xs.len() as i32 {
Some(xs[i as usize].clone())
} else {
None
}
}
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