use ratatui::layout::{Alignment, Constraint, Layout, Rect};
use ratatui::style::{Color, Style, Stylize};
use ratatui::text::{Line, Span};
use ratatui::widgets::Paragraph;
use ratatui::Frame;
use tui_big_text::{BigText, PixelSize};

use crate::state::ui::UiState;

pub fn render(frame: &mut Frame, area: Rect, ui: &UiState) {
    frame.render_widget(&ui.sparkles, area);

    let author_style = Style::new().fg(Color::Rgb(180, 140, 200));
    let link_style = Style::new().fg(Color::Rgb(120, 200, 180));
    let license_style = Style::new().fg(Color::Rgb(200, 160, 100));

    let big_title = BigText::builder()
        .pixel_size(PixelSize::Quadrant)
        .style(Style::new().cyan().bold())
        .lines(vec!["CAGIRE".into()])
        .centered()
        .build();

    let subtitle_lines = vec![
        Line::from(""),
        Line::from(Span::styled(
            "A Forth Music Sequencer",
            Style::new().fg(Color::White),
        )),
        Line::from(""),
        Line::from(Span::styled("by BuboBubo", author_style)),
        Line::from(""),
        Line::from(Span::styled("https://raphaelforment.fr", link_style)),
        Line::from(""),
        Line::from(Span::styled("AGPL-3.0", license_style)),
        Line::from(""),
        Line::from(""),
        Line::from(Span::styled(
            "Press any key to continue",
            Style::new().fg(Color::Rgb(140, 160, 170)),
        )),
    ];

    let big_text_height = 4;
    let subtitle_height = subtitle_lines.len() as u16;
    let total_height = big_text_height + subtitle_height;
    let vertical_padding = area.height.saturating_sub(total_height) / 2;

    let [_, title_area, subtitle_area, _] = Layout::vertical([
        Constraint::Length(vertical_padding),
        Constraint::Length(big_text_height),
        Constraint::Length(subtitle_height),
        Constraint::Fill(1),
    ])
    .areas(area);

    frame.render_widget(big_title, title_area);

    let subtitle = Paragraph::new(subtitle_lines).alignment(Alignment::Center);
    frame.render_widget(subtitle, subtitle_area);
}