//! Implementation of TdClientTrait for FakeTdClient

use super::fake_tdclient::FakeTdClient;
use async_trait::async_trait;
use tdlib_rs::enums::{ChatAction, Update};
use tele_tui::tdlib::{AuthState, ChatInfo, FolderInfo, MessageInfo, ProfileInfo, ReplyInfo, UserCache, UserOnlineStatus};
use tele_tui::tdlib::TdClientTrait;
use tele_tui::types::{ChatId, MessageId, UserId};

#[async_trait]
impl TdClientTrait for FakeTdClient {
    // ============ Auth methods (not implemented for fake) ============
    async fn send_phone_number(&self, _phone: String) -> Result<(), String> {
        Ok(())
    }

    async fn send_code(&self, _code: String) -> Result<(), String> {
        Ok(())
    }

    async fn send_password(&self, _password: String) -> Result<(), String> {
        Ok(())
    }

    // ============ Chat methods ============
    async fn load_chats(&mut self, limit: i32) -> Result<(), String> {
        // FakeTdClient loads chats but returns void
        let _ = FakeTdClient::load_chats(self, limit as usize).await?;
        Ok(())
    }

    async fn load_folder_chats(&mut self, folder_id: i32, limit: i32) -> Result<(), String> {
        FakeTdClient::load_folder_chats(self, folder_id, limit as usize).await
    }

    async fn leave_chat(&self, _chat_id: ChatId) -> Result<(), String> {
        // Not implemented for fake client
        Ok(())
    }

    async fn get_profile_info(&self, chat_id: ChatId) -> Result<ProfileInfo, String> {
        FakeTdClient::get_profile_info(self, chat_id).await
    }

    // ============ Chat actions ============
    async fn send_chat_action(&self, chat_id: ChatId, action: ChatAction) {
        let action_str = format!("{:?}", action);
        FakeTdClient::send_chat_action(self, chat_id, action_str).await;
    }

    fn clear_stale_typing_status(&mut self) -> bool {
        // Not implemented for fake
        false
    }

    // ============ Message methods ============
    async fn get_chat_history(&mut self, chat_id: ChatId, limit: i32) -> Result<Vec<MessageInfo>, String> {
        FakeTdClient::get_chat_history(self, chat_id, limit).await
    }

    async fn load_older_messages(&mut self, chat_id: ChatId, from_message_id: MessageId) -> Result<Vec<MessageInfo>, String> {
        FakeTdClient::load_older_messages(self, chat_id, from_message_id).await
    }

    async fn get_pinned_messages(&mut self, _chat_id: ChatId) -> Result<Vec<MessageInfo>, String> {
        // Not implemented for fake
        Ok(vec![])
    }

    async fn load_current_pinned_message(&mut self, _chat_id: ChatId) {
        // Not implemented for fake
    }

    async fn search_messages(&self, chat_id: ChatId, query: &str) -> Result<Vec<MessageInfo>, String> {
        FakeTdClient::search_messages(self, chat_id, query).await
    }

    async fn send_message(
        &mut self,
        chat_id: ChatId,
        text: String,
        reply_to_message_id: Option<MessageId>,
        reply_info: Option<ReplyInfo>,
    ) -> Result<MessageInfo, String> {
        FakeTdClient::send_message(self, chat_id, text, reply_to_message_id, reply_info).await
    }

    async fn edit_message(
        &mut self,
        chat_id: ChatId,
        message_id: MessageId,
        new_text: String,
    ) -> Result<MessageInfo, String> {
        FakeTdClient::edit_message(self, chat_id, message_id, new_text).await
    }

    async fn delete_messages(
        &mut self,
        chat_id: ChatId,
        message_ids: Vec<MessageId>,
        revoke: bool,
    ) -> Result<(), String> {
        FakeTdClient::delete_messages(self, chat_id, message_ids, revoke).await
    }

    async fn forward_messages(
        &mut self,
        to_chat_id: ChatId,
        from_chat_id: ChatId,
        message_ids: Vec<MessageId>,
    ) -> Result<(), String> {
        FakeTdClient::forward_messages(self, from_chat_id, to_chat_id, message_ids).await
    }

    async fn set_draft_message(&self, chat_id: ChatId, text: String) -> Result<(), String> {
        FakeTdClient::set_draft_message(self, chat_id, text).await
    }

    fn push_message(&mut self, _msg: MessageInfo) {
        // Not used in fake client
    }

    async fn fetch_missing_reply_info(&mut self) {
        // Not used in fake client
    }

    async fn process_pending_view_messages(&mut self) {
        // Перемещаем pending в viewed для проверки в тестах
        let mut pending = self.pending_view_messages.lock().unwrap();
        for (chat_id, message_ids) in pending.drain(..) {
            let ids: Vec<i64> = message_ids.iter().map(|id| id.as_i64()).collect();
            self.viewed_messages.lock().unwrap().push((chat_id.as_i64(), ids));
        }
    }

    // ============ User methods ============
    fn get_user_status_by_chat_id(&self, _chat_id: ChatId) -> Option<&UserOnlineStatus> {
        // Not implemented for fake
        None
    }

    async fn process_pending_user_ids(&mut self) {
        // Not used in fake client
    }

    // ============ Reaction methods ============
    async fn get_message_available_reactions(
        &self,
        chat_id: ChatId,
        message_id: MessageId,
    ) -> Result<Vec<String>, String> {
        FakeTdClient::get_message_available_reactions(self, chat_id, message_id).await
    }

    async fn toggle_reaction(
        &self,
        chat_id: ChatId,
        message_id: MessageId,
        reaction: String,
    ) -> Result<(), String> {
        FakeTdClient::toggle_reaction(self, chat_id, message_id, reaction).await
    }

    // ============ Getters (immutable) ============
    fn client_id(&self) -> i32 {
        0 // Fake client ID
    }

    async fn get_me(&self) -> Result<i64, String> {
        Ok(12345) // Fake user ID
    }

    fn auth_state(&self) -> &AuthState {
        // Can't return reference from Arc<Mutex>, need to use a different approach
        // For now, return a static reference based on the current state
        use std::sync::OnceLock;
        static AUTH_STATE_READY: AuthState = AuthState::Ready;
        static AUTH_STATE_WAIT_PHONE: OnceLock<AuthState> = OnceLock::new();
        static AUTH_STATE_WAIT_CODE: OnceLock<AuthState> = OnceLock::new();
        static AUTH_STATE_WAIT_PASSWORD: OnceLock<AuthState> = OnceLock::new();
        
        let current = self.auth_state.lock().unwrap();
        match *current {
            AuthState::Ready => &AUTH_STATE_READY,
            AuthState::WaitPhoneNumber => AUTH_STATE_WAIT_PHONE.get_or_init(|| AuthState::WaitPhoneNumber),
            AuthState::WaitCode => AUTH_STATE_WAIT_CODE.get_or_init(|| AuthState::WaitCode),
            AuthState::WaitPassword => AUTH_STATE_WAIT_PASSWORD.get_or_init(|| AuthState::WaitPassword),
            _ => &AUTH_STATE_READY,
        }
    }

    fn chats(&self) -> &[ChatInfo] {
        // FakeTdClient uses Arc<Mutex>, can't return direct reference
        // This is a limitation - we'll need to work around it
        &[]
    }

    fn folders(&self) -> &[FolderInfo] {
        &[]
    }

    fn current_chat_messages(&self) -> Vec<MessageInfo> {
        if let Some(chat_id) = *self.current_chat_id.lock().unwrap() {
            return self.get_messages(chat_id);
        }
        Vec::new()
    }

    fn current_chat_id(&self) -> Option<ChatId> {
        self.get_current_chat_id().map(ChatId::new)
    }

    fn current_pinned_message(&self) -> Option<MessageInfo> {
        self.current_pinned_message.lock().unwrap().clone()
    }

    fn typing_status(&self) -> Option<&(UserId, String, std::time::Instant)> {
        None
    }

    fn pending_view_messages(&self) -> &[(ChatId, Vec<MessageId>)] {
        &[]
    }

    fn pending_user_ids(&self) -> &[UserId] {
        &[]
    }

    fn main_chat_list_position(&self) -> i32 {
        0
    }

    fn user_cache(&self) -> &UserCache {
        // Not implemented for fake - return empty cache
        use std::sync::OnceLock;
        static EMPTY_CACHE: OnceLock<UserCache> = OnceLock::new();
        EMPTY_CACHE.get_or_init(|| UserCache::new(0))
    }

    fn network_state(&self) -> tele_tui::tdlib::types::NetworkState {
        FakeTdClient::get_network_state(self)
    }

    // ============ Setters (mutable) ============
    fn chats_mut(&mut self) -> &mut Vec<ChatInfo> {
        // Can't return mutable reference from Arc<Mutex>
        // This is a design limitation - we need a different approach
        panic!("chats_mut not supported for FakeTdClient - use get_chats() instead")
    }

    fn folders_mut(&mut self) -> &mut Vec<FolderInfo> {
        panic!("folders_mut not supported for FakeTdClient")
    }

    fn current_chat_messages_mut(&mut self) -> &mut Vec<MessageInfo> {
        panic!("current_chat_messages_mut not supported for FakeTdClient")
    }

    fn clear_current_chat_messages(&mut self) {
        if let Some(chat_id) = *self.current_chat_id.lock().unwrap() {
            self.messages.lock().unwrap().remove(&chat_id);
        }
    }

    fn set_current_chat_messages(&mut self, messages: Vec<MessageInfo>) {
        if let Some(chat_id) = *self.current_chat_id.lock().unwrap() {
            self.messages.lock().unwrap().insert(chat_id, messages);
        }
    }

    fn set_current_chat_id(&mut self, chat_id: Option<ChatId>) {
        *self.current_chat_id.lock().unwrap() = chat_id.map(|id| id.as_i64());
    }

    fn set_current_pinned_message(&mut self, msg: Option<MessageInfo>) {
        *self.current_pinned_message.lock().unwrap() = msg;
    }

    fn set_typing_status(&mut self, _status: Option<(UserId, String, std::time::Instant)>) {
        // Not implemented
    }

    fn pending_view_messages_mut(&mut self) -> &mut Vec<(ChatId, Vec<MessageId>)> {
        // WORKAROUND: Возвращаем мутабельную ссылку через leak
        // Это безопасно так как мы единственные владельцы &mut self
        let guard = self.pending_view_messages.lock().unwrap();
        unsafe { &mut *(guard.as_ptr() as *mut Vec<(ChatId, Vec<MessageId>)>) }
    }

    fn pending_user_ids_mut(&mut self) -> &mut Vec<UserId> {
        panic!("pending_user_ids_mut not supported for FakeTdClient")
    }

    fn set_main_chat_list_position(&mut self, _position: i32) {
        // Not implemented
    }

    fn user_cache_mut(&mut self) -> &mut UserCache {
        panic!("user_cache_mut not supported for FakeTdClient")
    }

    // ============ Notification methods ============
    fn sync_notification_muted_chats(&mut self) {
        // Not implemented for fake client (notifications are not tested)
    }

    // ============ Update handling ============
    fn handle_update(&mut self, _update: Update) {
        // Not implemented for fake client
    }
}