from datetime import datetime
from typing import Optional, List, Tuple
from database.base import DatabaseConnection
from database.models import TelegramPost, PostContent, MessageContentLink


class PostRepository(DatabaseConnection):
    """Репозиторий для работы с постами из Telegram."""
    
    async def create_tables(self):
        """Создание таблиц для постов."""
        # Таблица постов из Telegram
        post_query = '''
            CREATE TABLE IF NOT EXISTS post_from_telegram_suggest (
                message_id INTEGER NOT NULL PRIMARY KEY,
                text TEXT,
                helper_text_message_id INTEGER,
                author_id INTEGER,
                created_at INTEGER NOT NULL,
                status TEXT NOT NULL DEFAULT 'suggest',
                is_anonymous INTEGER,
                FOREIGN KEY (author_id) REFERENCES our_users (user_id) ON DELETE CASCADE
            )
        '''
        await self._execute_query(post_query)
        
        # Таблица контента постов
        content_query = '''
            CREATE TABLE IF NOT EXISTS content_post_from_telegram (
                message_id INTEGER NOT NULL,
                content_name TEXT NOT NULL,
                content_type TEXT,
                PRIMARY KEY (message_id, content_name),
                FOREIGN KEY (message_id) REFERENCES post_from_telegram_suggest (message_id) ON DELETE CASCADE
            )
        '''
        await self._execute_query(content_query)
        
        # Таблица связи сообщений с контентом
        link_query = '''
            CREATE TABLE IF NOT EXISTS message_link_to_content (
                post_id INTEGER NOT NULL,
                message_id INTEGER NOT NULL,
                PRIMARY KEY (post_id, message_id),
                FOREIGN KEY (post_id) REFERENCES post_from_telegram_suggest (message_id) ON DELETE CASCADE
            )
        '''
        await self._execute_query(link_query)
        
        self.logger.info("Таблицы для постов созданы")
    
    async def add_post(self, post: TelegramPost) -> None:
        """Добавление поста."""
        if not post.created_at:
            post.created_at = int(datetime.now().timestamp())
        status = post.status if post.status else "suggest"
        # Преобразуем bool в int для SQLite (True -> 1, False -> 0, None -> None)
        is_anonymous_int = None if post.is_anonymous is None else (1 if post.is_anonymous else 0)

        query = """
            INSERT INTO post_from_telegram_suggest (message_id, text, author_id, created_at, status, is_anonymous)
            VALUES (?, ?, ?, ?, ?, ?)
        """
        params = (post.message_id, post.text, post.author_id, post.created_at, status, is_anonymous_int)

        await self._execute_query(query, params)
        self.logger.info(f"Пост добавлен: message_id={post.message_id}")
    
    async def update_helper_message(self, message_id: int, helper_message_id: int) -> None:
        """Обновление helper сообщения."""
        query = "UPDATE post_from_telegram_suggest SET helper_text_message_id = ? WHERE message_id = ?"
        await self._execute_query(query, (helper_message_id, message_id))

    async def update_status_by_message_id(self, message_id: int, status: str) -> int:
        """Обновление статуса поста по message_id (одиночные посты). Возвращает число обновлённых строк."""
        conn = None
        try:
            conn = await self._get_connection()
            await conn.execute(
                "UPDATE post_from_telegram_suggest SET status = ? WHERE message_id = ?",
                (status, message_id),
            )
            cur = await conn.execute("SELECT changes()")
            row = await cur.fetchone()
            n = row[0] if row else 0
            await conn.commit()
            if n == 0:
                self.logger.warning(
                    f"update_status_by_message_id: 0 строк обновлено для message_id={message_id}, status={status}"
                )
            else:
                self.logger.info(f"Статус поста message_id={message_id} обновлён на {status}")
            return n
        except Exception as e:
            if conn:
                await conn.rollback()
            self.logger.error(f"Ошибка при обновлении статуса message_id={message_id}: {e}")
            raise
        finally:
            if conn:
                await conn.close()

    async def update_status_for_media_group_by_helper_id(
        self, helper_message_id: int, status: str
    ) -> int:
        """Обновление статуса постов медиагруппы по helper_text_message_id. Возвращает число обновлённых строк."""
        conn = None
        try:
            conn = await self._get_connection()
            await conn.execute(
                """
                UPDATE post_from_telegram_suggest
                SET status = ?
                WHERE message_id = ? OR helper_text_message_id = ?
                """,
                (status, helper_message_id, helper_message_id),
            )
            cur = await conn.execute("SELECT changes()")
            row = await cur.fetchone()
            n = row[0] if row else 0
            await conn.commit()
            if n == 0:
                self.logger.warning(
                    f"update_status_for_media_group_by_helper_id: 0 строк обновлено "
                    f"для helper_message_id={helper_message_id}, status={status}"
                )
            else:
                self.logger.info(
                    f"Статус медиагруппы helper_message_id={helper_message_id} обновлён на {status}"
                )
            return n
        except Exception as e:
            if conn:
                await conn.rollback()
            self.logger.error(
                f"Ошибка при обновлении статуса медиагруппы helper_message_id={helper_message_id}: {e}"
            )
            raise
        finally:
            if conn:
                await conn.close()

    async def add_post_content(self, post_id: int, message_id: int, content_name: str, content_type: str) -> bool:
        """Добавление контента поста."""
        try:
            # Сначала добавляем связь
            link_query = "INSERT OR IGNORE INTO message_link_to_content (post_id, message_id) VALUES (?, ?)"
            await self._execute_query(link_query, (post_id, message_id))
            
            # Затем добавляем контент
            content_query = """
                INSERT OR IGNORE INTO content_post_from_telegram (message_id, content_name, content_type) 
                VALUES (?, ?, ?)
            """
            await self._execute_query(content_query, (message_id, content_name, content_type))
            
            self.logger.info(f"Контент поста добавлен: post_id={post_id}, message_id={message_id}")
            return True
        except Exception as e:
            self.logger.error(f"Ошибка при добавлении контента поста: {e}")
            return False
    
    async def get_post_content_by_helper_id(self, helper_message_id: int) -> List[Tuple[str, str]]:
        """Получает контент поста по helper_text_message_id."""
        query = """
            SELECT cpft.content_name, cpft.content_type
            FROM post_from_telegram_suggest pft
            JOIN message_link_to_content mltc ON pft.message_id = mltc.post_id
            JOIN content_post_from_telegram cpft ON cpft.message_id = mltc.message_id
            WHERE pft.helper_text_message_id = ?
        """
        post_content = await self._execute_query_with_result(query, (helper_message_id,))
        
        self.logger.info(f"Получен контент поста: {len(post_content)} элементов")
        return post_content
    
    async def get_post_text_by_helper_id(self, helper_message_id: int) -> Optional[str]:
        """Получает текст поста по helper_text_message_id."""
        query = "SELECT text FROM post_from_telegram_suggest WHERE helper_text_message_id = ?"
        rows = await self._execute_query_with_result(query, (helper_message_id,))
        row = rows[0] if rows else None
        
        if row:
            self.logger.info(f"Получен текст поста для helper_message_id={helper_message_id}")
            return row[0]
        return None
    
    async def get_post_ids_by_helper_id(self, helper_message_id: int) -> List[int]:
        """Получает ID сообщений по helper_text_message_id."""
        query = """
            SELECT mltc.message_id
            FROM post_from_telegram_suggest pft
            JOIN message_link_to_content mltc ON pft.message_id = mltc.post_id
            WHERE pft.helper_text_message_id = ?
        """
        rows = await self._execute_query_with_result(query, (helper_message_id,))
        
        post_ids = [row[0] for row in rows]
        self.logger.info(f"Получены ID сообщений: {len(post_ids)} элементов")
        return post_ids
    
    async def get_author_id_by_message_id(self, message_id: int) -> Optional[int]:
        """Получает ID автора по message_id."""
        query = "SELECT author_id FROM post_from_telegram_suggest WHERE message_id = ?"
        rows = await self._execute_query_with_result(query, (message_id,))
        row = rows[0] if rows else None
        
        if row:
            author_id = row[0]
            self.logger.info(f"Получен author_id: {author_id} для message_id={message_id}")
            return author_id
        return None
    
    async def get_author_id_by_helper_message_id(self, helper_message_id: int) -> Optional[int]:
        """Получает ID автора по helper_text_message_id."""
        query = "SELECT author_id FROM post_from_telegram_suggest WHERE helper_text_message_id = ?"
        rows = await self._execute_query_with_result(query, (helper_message_id,))
        row = rows[0] if rows else None
        
        if row:
            author_id = row[0]
            self.logger.info(f"Получен author_id: {author_id} для helper_message_id={helper_message_id}")
            return author_id
        return None
    
    async def get_post_text_and_anonymity_by_message_id(self, message_id: int) -> Tuple[Optional[str], Optional[bool]]:
        """Получает текст и is_anonymous поста по message_id."""
        query = "SELECT text, is_anonymous FROM post_from_telegram_suggest WHERE message_id = ?"
        rows = await self._execute_query_with_result(query, (message_id,))
        row = rows[0] if rows else None
        
        if row:
            text = row[0] or ""
            is_anonymous_int = row[1]
            # Преобразуем int в bool (1 -> True, 0 -> False, NULL -> None)
            is_anonymous = None if is_anonymous_int is None else bool(is_anonymous_int)
            self.logger.info(f"Получены текст и is_anonymous для message_id={message_id}")
            return text, is_anonymous
        return None, None
    
    async def get_post_text_and_anonymity_by_helper_id(self, helper_message_id: int) -> Tuple[Optional[str], Optional[bool]]:
        """Получает текст и is_anonymous поста по helper_text_message_id."""
        query = "SELECT text, is_anonymous FROM post_from_telegram_suggest WHERE helper_text_message_id = ?"
        rows = await self._execute_query_with_result(query, (helper_message_id,))
        row = rows[0] if rows else None
        
        if row:
            text = row[0] or ""
            is_anonymous_int = row[1]
            # Преобразуем int в bool (1 -> True, 0 -> False, NULL -> None)
            is_anonymous = None if is_anonymous_int is None else bool(is_anonymous_int)
            self.logger.info(f"Получены текст и is_anonymous для helper_message_id={helper_message_id}")
            return text, is_anonymous
        return None, None