//! Search input handlers
//!
//! Handles keyboard input for search functionality, including:
//! - Chat list search mode
//! - Message search mode
//! - Search query input

use crate::app::App;
use crate::app::methods::{navigation::NavigationMethods, search::SearchMethods};
use crate::tdlib::TdClientTrait;
use crate::types::{ChatId, MessageId};
use crate::utils::with_timeout;
use crossterm::event::{KeyCode, KeyEvent};
use std::time::Duration;

use super::chat_list::open_chat_and_load_data;
use super::scroll_to_message;

/// Обработка режима поиска по чатам
/// 
/// Обрабатывает:
/// - Редактирование поискового запроса (Backspace, Char)
/// - Навигацию по отфильтрованному списку (Up/Down)
/// - Открытие выбранного чата (Enter)
/// - Отмену поиска (Esc)
pub async fn handle_chat_search_mode<T: TdClientTrait>(app: &mut App<T>, key: KeyEvent, command: Option<crate::config::Command>) {
    match command {
        Some(crate::config::Command::Cancel) => {
            app.cancel_search();
        }
        Some(crate::config::Command::SubmitMessage) => {
            app.select_filtered_chat();
            if let Some(chat_id) = app.get_selected_chat_id() {
                open_chat_and_load_data(app, chat_id).await;
            }
        }
        Some(crate::config::Command::MoveDown) => {
            app.next_filtered_chat();
        }
        Some(crate::config::Command::MoveUp) => {
            app.previous_filtered_chat();
        }
        _ => {
            match key.code {
                KeyCode::Backspace => {
                    app.search_query.pop();
                    app.chat_list_state.select(Some(0));
                }
                KeyCode::Char(c) => {
                    app.search_query.push(c);
                    app.chat_list_state.select(Some(0));
                }
                _ => {}
            }
        }
    }
}

/// Обработка режима поиска по сообщениям в открытом чате
/// 
/// Обрабатывает:
/// - Навигацию по результатам поиска (Up/Down/N/n)
/// - Переход к выбранному сообщению (Enter)
/// - Редактирование поискового запроса (Backspace, Char)
/// - Выход из режима поиска (Esc)
pub async fn handle_message_search_mode<T: TdClientTrait>(app: &mut App<T>, key: KeyEvent, command: Option<crate::config::Command>) {
    match command {
        Some(crate::config::Command::Cancel) => {
            app.exit_message_search_mode();
        }
        Some(crate::config::Command::MoveUp) => {
            app.select_previous_search_result();
        }
        Some(crate::config::Command::MoveDown) => {
            app.select_next_search_result();
        }
        Some(crate::config::Command::SubmitMessage) => {
            if let Some(msg_id) = app.get_selected_search_result_id() {
                scroll_to_message(app, MessageId::new(msg_id));
                app.exit_message_search_mode();
            }
        }
        _ => {
            match key.code {
                KeyCode::Char('N') => {
                    app.select_previous_search_result();
                }
                KeyCode::Char('n') => {
                    app.select_next_search_result();
                }
                KeyCode::Backspace => {
                    let Some(mut query) = app.get_search_query().map(|s| s.to_string()) else {
                        return;
                    };
                    query.pop();
                    app.update_search_query(query.clone());
                    perform_message_search(app, &query).await;
                }
                KeyCode::Char(c) => {
                    let Some(mut query) = app.get_search_query().map(|s| s.to_string()) else {
                        return;
                    };
                    query.push(c);
                    app.update_search_query(query.clone());
                    perform_message_search(app, &query).await;
                }
                _ => {}
            }
        }
    }
}

/// Выполняет поиск по сообщениям с обновлением результатов
pub async fn perform_message_search<T: TdClientTrait>(app: &mut App<T>, query: &str) {
    let Some(chat_id) = app.get_selected_chat_id() else {
        return;
    };

    if query.is_empty() {
        app.set_search_results(Vec::new());
        return;
    }

    if let Ok(results) = with_timeout(
        Duration::from_secs(3),
        app.td_client.search_messages(ChatId::new(chat_id), query),
    )
    .await
    {
        app.set_search_results(results);
    }
}