// Test App builder

use ratatui::widgets::ListState;
use std::collections::HashMap;
use super::FakeTdClient;
use tele_tui::app::{App, AppScreen, ChatState};
use tele_tui::config::Config;
use tele_tui::tdlib::AuthState;
use tele_tui::tdlib::{ChatInfo, MessageInfo};
use tele_tui::types::{ChatId, MessageId};

/// Builder для создания тестового App с FakeTdClient\n///\n/// Использует trait-based DI для подмены TdClient на FakeTdClient в тестах.
pub struct TestAppBuilder {
    config: Config,
    screen: AppScreen,
    chats: Vec<ChatInfo>,
    selected_chat_id: Option<i64>,
    message_input: String,
    is_searching: bool,
    search_query: String,
    chat_state: Option<ChatState>,
    messages: HashMap<i64, Vec<MessageInfo>>,
    status_message: Option<String>,
    auth_state: Option<AuthState>,
    phone_input: Option<String>,
    code_input: Option<String>,
    password_input: Option<String>,
}

impl Default for TestAppBuilder {
    fn default() -> Self {
        Self::new()
    }
}

impl TestAppBuilder {
    pub fn new() -> Self {
        Self {
            config: Config::default(),
            screen: AppScreen::Main,
            chats: vec![],
            selected_chat_id: None,
            message_input: String::new(),
            is_searching: false,
            search_query: String::new(),
            chat_state: None,
            messages: HashMap::new(),
            status_message: None,
            auth_state: None,
            phone_input: None,
            code_input: None,
            password_input: None,
        }
    }

    /// Установить экран
    pub fn screen(mut self, screen: AppScreen) -> Self {
        self.screen = screen;
        self
    }

    /// Установить конфиг
    pub fn config(mut self, config: Config) -> Self {
        self.config = config;
        self
    }

    /// Добавить чат
    pub fn with_chat(mut self, chat: ChatInfo) -> Self {
        self.chats.push(chat);
        self
    }

    /// Добавить несколько чатов
    pub fn with_chats(mut self, chats: Vec<ChatInfo>) -> Self {
        self.chats.extend(chats);
        self
    }

    /// Выбрать чат
    pub fn selected_chat(mut self, chat_id: i64) -> Self {
        self.selected_chat_id = Some(chat_id);
        self
    }

    /// Установить текст в инпуте
    pub fn message_input(mut self, text: &str) -> Self {
        self.message_input = text.to_string();
        self
    }

    /// Режим поиска
    pub fn searching(mut self, query: &str) -> Self {
        self.is_searching = true;
        self.search_query = query.to_string();
        self
    }

    /// Режим редактирования сообщения
    pub fn editing_message(mut self, message_id: i64, selected_index: usize) -> Self {
        self.chat_state = Some(ChatState::Editing {
            message_id: MessageId::new(message_id),
            selected_index,
        });
        self
    }

    /// Режим ответа на сообщение
    pub fn replying_to(mut self, message_id: i64) -> Self {
        self.chat_state = Some(ChatState::Reply { message_id: MessageId::new(message_id) });
        self
    }

    /// Режим выбора реакции
    pub fn reaction_picker(mut self, message_id: i64, available_reactions: Vec<String>) -> Self {
        self.chat_state = Some(ChatState::ReactionPicker {
            message_id: MessageId::new(message_id),
            available_reactions,
            selected_index: 0,
        });
        self
    }

    /// Режим профиля
    pub fn profile_mode(mut self, info: tele_tui::tdlib::ProfileInfo) -> Self {
        self.chat_state = Some(ChatState::Profile {
            info,
            selected_action: 0,
            leave_group_confirmation_step: 0,
        });
        self
    }

    /// Подтверждение удаления
    pub fn delete_confirmation(mut self, message_id: i64) -> Self {
        self.chat_state = Some(ChatState::DeleteConfirmation { message_id: MessageId::new(message_id) });
        self
    }

    /// Добавить сообщение для чата
    pub fn with_message(mut self, chat_id: i64, message: MessageInfo) -> Self {
        self.messages
            .entry(chat_id)
            .or_insert_with(Vec::new)
            .push(message);
        self
    }

    /// Добавить несколько сообщений для чата
    pub fn with_messages(mut self, chat_id: i64, messages: Vec<MessageInfo>) -> Self {
        self.messages
            .entry(chat_id)
            .or_insert_with(Vec::new)
            .extend(messages);
        self
    }

    /// Установить выбранное сообщение (режим selection)
    pub fn selecting_message(mut self, selected_index: usize) -> Self {
        self.chat_state = Some(ChatState::MessageSelection { selected_index });
        self
    }

    /// Режим поиска по сообщениям в чате
    pub fn message_search(mut self, query: &str) -> Self {
        self.chat_state = Some(ChatState::SearchInChat {
            query: query.to_string(),
            results: Vec::new(),
            selected_index: 0,
        });
        self
    }

    /// Режим пересылки сообщения
    pub fn forward_mode(mut self, message_id: i64) -> Self {
        self.chat_state = Some(ChatState::Forward {
            message_id: MessageId::new(message_id),
            selecting_chat: true,
        });
        self
    }

    /// Установить статус сообщение (для loading screen)
    pub fn status_message(mut self, message: &str) -> Self {
        self.status_message = Some(message.to_string());
        self
    }

    /// Установить auth state
    pub fn auth_state(mut self, state: AuthState) -> Self {
        self.auth_state = Some(state);
        self
    }

    /// Установить phone input
    pub fn phone_input(mut self, phone: &str) -> Self {
        self.phone_input = Some(phone.to_string());
        self
    }

    /// Установить code input
    pub fn code_input(mut self, code: &str) -> Self {
        self.code_input = Some(code.to_string());
        self
    }

    /// Установить password input
    pub fn password_input(mut self, password: &str) -> Self {
        self.password_input = Some(password.to_string());
        self
    }

    /// Построить App с FakeTdClient
    ///
    /// Создаёт App с FakeTdClient, подходит для любых тестов включая
    /// интеграционные тесты логики.
    pub fn build(self) -> App<FakeTdClient> {
        // Создаём FakeTdClient с чатами и сообщениями
        let mut fake_client = FakeTdClient::new();
        
        // Добавляем чаты
        for chat in &self.chats {
            fake_client = fake_client.with_chat(chat.clone());
        }
        
        // Добавляем сообщения
        for (chat_id, messages) in self.messages {
            fake_client = fake_client.with_messages(chat_id, messages);
        }
        
        // Устанавливаем текущий чат если нужно
        if let Some(chat_id) = self.selected_chat_id {
            *fake_client.current_chat_id.lock().unwrap() = Some(chat_id);
        }

        // Устанавливаем auth state если нужно
        if let Some(auth_state) = self.auth_state {
            fake_client = fake_client.with_auth_state(auth_state);
        }
        
        // Создаём App с FakeTdClient
        let mut app = App::with_client(self.config, fake_client);

        app.screen = self.screen;
        app.chats = self.chats;
        app.selected_chat_id = self.selected_chat_id.map(ChatId::new);
        app.message_input = self.message_input;
        app.is_searching = self.is_searching;
        app.search_query = self.search_query;
        
        // Применяем chat_state если он установлен
        if let Some(chat_state) = self.chat_state {
            app.chat_state = chat_state;
        }

        // Применяем status_message
        if let Some(status) = self.status_message {
            app.status_message = Some(status);
        }

        // Применяем auth inputs
        if let Some(phone) = self.phone_input {
            app.phone_input = phone;
        }
        if let Some(code) = self.code_input {
            app.code_input = code;
        }
        if let Some(password) = self.password_input {
            app.password_input = password;
        }

        // Выбираем первый чат если есть
        if !app.chats.is_empty() {
            let mut list_state = ListState::default();
            list_state.select(Some(0));
            app.chat_list_state = list_state;
        }

        app
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::helpers::test_data::create_test_chat;

    #[test]
    fn test_builder_defaults() {
        let app = TestAppBuilder::new().build();

        assert_eq!(app.screen, AppScreen::Main);
        assert_eq!(app.chats.len(), 0);
        assert_eq!(app.selected_chat_id, None);
        assert_eq!(app.message_input, "");
    }

    #[test]
    fn test_builder_with_chats() {
        let chat1 = create_test_chat("Mom", 123);
        let chat2 = create_test_chat("Boss", 456);

        let app = TestAppBuilder::new()
            .with_chat(chat1)
            .with_chat(chat2)
            .build();

        assert_eq!(app.chats.len(), 2);
        assert_eq!(app.chats[0].title, "Mom");
        assert_eq!(app.chats[1].title, "Boss");
    }

    #[test]
    fn test_builder_with_selected_chat() {
        let chat = create_test_chat("Mom", 123);

        let app = TestAppBuilder::new()
            .with_chat(chat)
            .selected_chat(123)
            .build();

        assert_eq!(app.selected_chat_id, Some(ChatId::new(123)));
    }

    #[test]
    fn test_builder_editing_mode() {
        let app = TestAppBuilder::new()
            .editing_message(999, 0)
            .message_input("Edited text")
            .build();

        assert!(app.is_editing());
        assert_eq!(app.chat_state.selected_message_id(), Some(MessageId::new(999)));
        assert_eq!(app.message_input, "Edited text");
    }

    #[test]
    fn test_builder_search_mode() {
        let app = TestAppBuilder::new().searching("test query").build();

        assert!(app.is_searching);
        assert_eq!(app.search_query, "test query");
    }
}