//! Message search modal

use crate::app::App;
use crate::tdlib::TdClientTrait;
use crate::ui::components::{calculate_scroll_offset, render_help_bar, render_message_item};
use ratatui::{
    layout::{Constraint, Direction, Layout, Rect},
    style::{Color, Modifier, Style},
    text::{Line, Span},
    widgets::{Block, Borders, Paragraph},
    Frame,
};

/// Renders message search mode
pub fn render<T: TdClientTrait>(f: &mut Frame, area: Rect, app: &App<T>) {
    // Извлекаем данные из ChatState
    let (query, results, selected_index) =
        if let crate::app::ChatState::SearchInChat { query, results, selected_index } =
            &app.chat_state
        {
            (query.as_str(), results.as_slice(), *selected_index)
        } else {
            return; // Некорректное состояние, не рендерим
        };

    let chunks = Layout::default()
        .direction(Direction::Vertical)
        .constraints([
            Constraint::Length(3), // Search input
            Constraint::Min(0),    // Search results
            Constraint::Length(3), // Help bar
        ])
        .split(area);

    // Search input
    let total = results.len();
    let current = if total > 0 { selected_index + 1 } else { 0 };

    let input_line = if query.is_empty() {
        Line::from(vec![
            Span::styled("🔍 ", Style::default().fg(Color::Yellow)),
            Span::styled("█", Style::default().fg(Color::Yellow)),
            Span::styled(" Введите текст для поиска...", Style::default().fg(Color::Gray)),
        ])
    } else {
        Line::from(vec![
            Span::styled("🔍 ", Style::default().fg(Color::Yellow)),
            Span::styled(query, Style::default().fg(Color::White)),
            Span::styled("█", Style::default().fg(Color::Yellow)),
            Span::styled(format!("  ({}/{})", current, total), Style::default().fg(Color::Gray)),
        ])
    };

    let search_input = Paragraph::new(input_line).block(
        Block::default()
            .borders(Borders::ALL)
            .border_style(Style::default().fg(Color::Yellow))
            .title(" Поиск по сообщениям ")
            .title_style(
                Style::default()
                    .fg(Color::Yellow)
                    .add_modifier(Modifier::BOLD),
            ),
    );
    f.render_widget(search_input, chunks[0]);

    // Search results
    let content_width = chunks[1].width.saturating_sub(2) as usize;
    let mut lines: Vec<Line> = Vec::new();

    if results.is_empty() {
        if !query.is_empty() {
            lines.push(Line::from(Span::styled(
                "Ничего не найдено",
                Style::default().fg(Color::Gray),
            )));
        }
    } else {
        for (idx, msg) in results.iter().enumerate() {
            if idx > 0 {
                lines.push(Line::from(""));
            }
            lines.extend(render_message_item(msg, idx == selected_index, content_width, 2));
        }
    }

    // Скролл к выбранному результату
    let scroll_offset = calculate_scroll_offset(selected_index, 4, chunks[1].height);

    let results_widget = Paragraph::new(lines)
        .block(
            Block::default()
                .borders(Borders::ALL)
                .border_style(Style::default().fg(Color::Yellow)),
        )
        .scroll((scroll_offset, 0));
    f.render_widget(results_widget, chunks[1]);

    // Help bar
    let help = render_help_bar(
        &[
            ("↑↓", "навигация", Color::Yellow),
            ("n/N", "след./пред.", Color::Yellow),
            ("Enter", "перейти", Color::Green),
            ("Esc", "выход", Color::Red),
        ],
        Color::Yellow,
    );
    f.render_widget(help, chunks[2]);
}