use ratatui::{
    layout::{Alignment, Constraint, Direction, Layout, Rect},
    style::{Color, Modifier, Style},
    text::{Line, Span},
    widgets::{Block, Borders, Paragraph},
    Frame,
};
use crate::app::App;
use crate::tdlib::client::ProfileInfo;

/// Рендерит режим просмотра профиля
pub fn render(f: &mut Frame, area: Rect, app: &App, profile: &ProfileInfo) {
    // Проверяем, показывать ли модалку подтверждения
    let confirmation_step = app.get_leave_group_confirmation_step();
    if confirmation_step > 0 {
        render_leave_confirmation_modal(f, area, confirmation_step);
        return;
    }

    let chunks = Layout::default()
        .direction(Direction::Vertical)
        .constraints([
            Constraint::Length(3),  // Header
            Constraint::Min(0),     // Profile info
            Constraint::Length(3),  // Actions help
        ])
        .split(area);

    // Header
    let header_text = format!("👤 ПРОФИЛЬ: {}", profile.title);
    let header = Paragraph::new(header_text)
        .block(
            Block::default()
                .borders(Borders::ALL)
                .border_style(Style::default().fg(Color::Cyan))
        )
        .style(Style::default().fg(Color::Cyan).add_modifier(Modifier::BOLD));
    f.render_widget(header, chunks[0]);

    // Profile info
    let mut lines: Vec<Line> = Vec::new();

    // Тип чата
    lines.push(Line::from(vec![
        Span::styled("Тип: ", Style::default().fg(Color::Gray)),
        Span::styled(&profile.chat_type, Style::default().fg(Color::White)),
    ]));
    lines.push(Line::from(""));

    // ID
    lines.push(Line::from(vec![
        Span::styled("ID: ", Style::default().fg(Color::Gray)),
        Span::styled(format!("{}", profile.chat_id), Style::default().fg(Color::White)),
    ]));
    lines.push(Line::from(""));

    // Username
    if let Some(username) = &profile.username {
        lines.push(Line::from(vec![
            Span::styled("Username: ", Style::default().fg(Color::Gray)),
            Span::styled(username, Style::default().fg(Color::Cyan)),
        ]));
        lines.push(Line::from(""));
    }

    // Phone number (только для личных чатов)
    if let Some(phone) = &profile.phone_number {
        lines.push(Line::from(vec![
            Span::styled("Телефон: ", Style::default().fg(Color::Gray)),
            Span::styled(phone, Style::default().fg(Color::White)),
        ]));
        lines.push(Line::from(""));
    }

    // Online status (только для личных чатов)
    if let Some(status) = &profile.online_status {
        lines.push(Line::from(vec![
            Span::styled("Статус: ", Style::default().fg(Color::Gray)),
            Span::styled(status, Style::default().fg(Color::Green)),
        ]));
        lines.push(Line::from(""));
    }

    // Bio (только для личных чатов)
    if let Some(bio) = &profile.bio {
        lines.push(Line::from(vec![
            Span::styled("О себе: ", Style::default().fg(Color::Gray)),
        ]));
        // Разбиваем bio на строки если длинное
        let bio_lines: Vec<&str> = bio.lines().collect();
        for bio_line in bio_lines {
            lines.push(Line::from(Span::styled(bio_line, Style::default().fg(Color::White))));
        }
        lines.push(Line::from(""));
    }

    // Member count (для групп/каналов)
    if let Some(count) = profile.member_count {
        lines.push(Line::from(vec![
            Span::styled("Участников: ", Style::default().fg(Color::Gray)),
            Span::styled(format!("{}", count), Style::default().fg(Color::White)),
        ]));
        lines.push(Line::from(""));
    }

    // Description (для групп/каналов)
    if let Some(desc) = &profile.description {
        lines.push(Line::from(vec![
            Span::styled("Описание: ", Style::default().fg(Color::Gray)),
        ]));
        let desc_lines: Vec<&str> = desc.lines().collect();
        for desc_line in desc_lines {
            lines.push(Line::from(Span::styled(desc_line, Style::default().fg(Color::White))));
        }
        lines.push(Line::from(""));
    }

    // Invite link (для групп/каналов)
    if let Some(link) = &profile.invite_link {
        lines.push(Line::from(vec![
            Span::styled("Ссылка: ", Style::default().fg(Color::Gray)),
            Span::styled(link, Style::default().fg(Color::Blue).add_modifier(Modifier::UNDERLINED)),
        ]));
        lines.push(Line::from(""));
    }

    // Разделитель
    lines.push(Line::from("────────────────────────────────"));
    lines.push(Line::from(""));

    // Действия
    lines.push(Line::from(Span::styled(
        "Действия:",
        Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD),
    )));
    lines.push(Line::from(""));

    let actions = get_available_actions(profile);
    for (idx, action) in actions.iter().enumerate() {
        let is_selected = idx == app.selected_profile_action;
        let marker = if is_selected { "▶ " } else { "  " };
        let style = if is_selected {
            Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)
        } else {
            Style::default().fg(Color::White)
        };
        lines.push(Line::from(vec![
            Span::styled(marker, Style::default().fg(Color::Yellow)),
            Span::styled(*action, style),
        ]));
    }

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

    // Help bar
    let help_line = Line::from(vec![
        Span::styled(" ↑↓ ", Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)),
        Span::raw("навигация"),
        Span::raw("  "),
        Span::styled(" Enter ", Style::default().fg(Color::Green).add_modifier(Modifier::BOLD)),
        Span::raw("выбрать"),
        Span::raw("  "),
        Span::styled(" Esc ", Style::default().fg(Color::Red).add_modifier(Modifier::BOLD)),
        Span::raw("выход"),
    ]);
    let help = Paragraph::new(help_line)
        .block(
            Block::default()
                .borders(Borders::ALL)
                .border_style(Style::default().fg(Color::Cyan))
        )
        .alignment(Alignment::Center);
    f.render_widget(help, chunks[2]);
}

/// Получить список доступных действий
fn get_available_actions(profile: &ProfileInfo) -> Vec<&'static str> {
    let mut actions = vec![];
    
    if profile.username.is_some() {
        actions.push("Открыть в браузере");
    }
    
    actions.push("Скопировать ID");
    
    if profile.is_group {
        actions.push("Покинуть группу");
    }
    
    actions
}

/// Рендерит модалку подтверждения выхода из группы
fn render_leave_confirmation_modal(f: &mut Frame, area: Rect, step: u8) {
    // Затемняем фон
    let modal_area = centered_rect(60, 30, area);

    let text = if step == 1 {
        "Вы хотите выйти из группы?"
    } else {
        "Вы ТОЧНО хотите выйти из группы?!?!?"
    };

    let lines = vec![
        Line::from(""),
        Line::from(Span::styled(
            text,
            Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD),
        )),
        Line::from(""),
        Line::from(""),
        Line::from(vec![
            Span::styled("y/н/Enter", Style::default().fg(Color::Green).add_modifier(Modifier::BOLD)),
            Span::raw(" — да    "),
            Span::styled("n/т/Esc", Style::default().fg(Color::Red).add_modifier(Modifier::BOLD)),
            Span::raw(" — нет"),
        ]),
    ];

    let modal = Paragraph::new(lines)
        .block(
            Block::default()
                .borders(Borders::ALL)
                .border_style(Style::default().fg(Color::Red))
                .title(" ⚠ ВНИМАНИЕ ")
                .title_style(Style::default().fg(Color::Red).add_modifier(Modifier::BOLD))
        )
        .alignment(Alignment::Center);

    f.render_widget(modal, modal_area);
}

/// Вспомогательная функция для центрирования прямоугольника
fn centered_rect(percent_x: u16, percent_y: u16, r: Rect) -> Rect {
    let popup_layout = Layout::default()
        .direction(Direction::Vertical)
        .constraints([
            Constraint::Percentage((100 - percent_y) / 2),
            Constraint::Percentage(percent_y),
            Constraint::Percentage((100 - percent_y) / 2),
        ])
        .split(r);

    Layout::default()
        .direction(Direction::Horizontal)
        .constraints([
            Constraint::Percentage((100 - percent_x) / 2),
            Constraint::Percentage(percent_x),
            Constraint::Percentage((100 - percent_x) / 2),
        ])
        .split(popup_layout[1])[1]
}