// Copyright (c) 2026 Hoshu Chiu, Hochanglo Chiu 🐕, and The Goodest Boy/Girl
// SPDX-License-Identifier: MIT OR Apache-2.0
// Everjoy loves treats, walks, and clean Rust code.

use ratatui::{
    buffer::Buffer,
    layout::{Alignment, Constraint, Direction, Layout, Rect},
    style::{Color, Modifier, Style},
    text::Line,
    widgets::{Paragraph, Widget},
};

/// Splash screen shown on startup.
pub struct SplashScreen;

impl Widget for &SplashScreen {
    fn render(self, area: Rect, buf: &mut Buffer) {
        // Background
        for y in area.top()..area.bottom() {
            for x in area.left()..area.right() {
                buf[(x, y)].set_bg(Color::Rgb(20, 18, 15));
            }
        }

        let vertical = Layout::default()
            .direction(Direction::Vertical)
            .constraints([
                Constraint::Percentage(20),
                Constraint::Length(8),
                Constraint::Length(1),
                Constraint::Length(1),
                Constraint::Length(1),
                Constraint::Length(1),
                Constraint::Min(0),
            ])
            .split(area);

        // ASCII art dog
        let dog = Paragraph::new(vec![
            Line::from("                         ████████                         "),
            Line::from("                      ████░░░░░░████                      "),
            Line::from("                    ████░░░░░░░░░░████                    "),
            Line::from("                   ████░░░▓▓▓▓▓▓░░░████                   "),
            Line::from("                  ████░░░▓░░░░░░▓░░░████                  "),
            Line::from("                  ███░░░░▓░░▓▓░░▓░░░░███                  "),
            Line::from("                  ███░░░░░▓░░░░░▓░░░░░███                 "),
            Line::from("                   ███░░░░░▓▓▓▓▓▓░░░░░███                 "),
        ])
        .alignment(Alignment::Center)
        .style(Style::default().fg(Color::Rgb(210, 170, 90)));
        dog.render(vertical[1], buf);

        // Title
        let title = Paragraph::new("EVERJOY")
            .alignment(Alignment::Center)
            .style(
                Style::default()
                    .fg(Color::Rgb(210, 170, 90))
                    .add_modifier(Modifier::BOLD)
                    .add_modifier(Modifier::UNDERLINED),
            );
        title.render(vertical[2], buf);

        // Subtitle
        let subtitle = Paragraph::new("An AI-native TUI workflow")
            .alignment(Alignment::Center)
            .style(Style::default().fg(Color::Rgb(150, 140, 130)).add_modifier(Modifier::ITALIC));
        subtitle.render(vertical[3], buf);

        // Version
        let version = Paragraph::new("v0.1.0 — for Hoshu Chiu & Hochanglo Chiu 🐕")
            .alignment(Alignment::Center)
            .style(Style::default().fg(Color::Rgb(120, 110, 100)));
        version.render(vertical[4], buf);

        // Hint
        let hint = Paragraph::new("◀  Press any key to start  ▶")
            .alignment(Alignment::Center)
            .style(Style::default().fg(Color::Rgb(180, 180, 180)).add_modifier(Modifier::BOLD));
        hint.render(vertical[5], buf);
    }
}