from fastapi import FastAPI, HTTPException, Query
from fastapi.middleware.cors import CORSMiddleware  # <-- добавлено
from pydantic import BaseModel
from typing import List, Optional
import psycopg2
import psycopg2.extras
import uvicorn
import json

app = FastAPI(title="Parser Data API",
              description="API для записи данных парсинга в базу данных",
              version="1.0")
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # или список разрешенных адресов, например ["http://localhost:8080"]
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


# Модель для данных, которые приходят в POST
class ParsedData(BaseModel):
    url: str
    parsed_at: str
    title: str
    original_text: str
    article_date: str
    status: Optional[bool] = False
    viewed: Optional[bool] = False
    other: str
    category: str
    translation_text: str
    short_text: str

# Подключение к БД
def get_connection():
    return psycopg2.connect(
        dbname="parsed_url",
        user="postgres",
        password="qwertyqwerty123123",
        # host="127.0.0.1"
        host ="45.129.78.228"
    )

@app.post("/save_parsed_data", summary="Сохранить данные парсинга")
def save_parsed_data(data: ParsedData):
    conn = None
    try:
        conn = get_connection()
        with conn.cursor() as cur:
            cur.execute("""
                INSERT INTO url (url, parsed_at, title, original_text, article_date, status, viewed, other, category, translation_text, short_text)
                VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
                ON CONFLICT (url) DO UPDATE SET
                    parsed_at = EXCLUDED.parsed_at,
                    title = EXCLUDED.title,
                    original_text = EXCLUDED.original_text,
                    article_date = EXCLUDED.article_date,
                    status = EXCLUDED.status,
                    viewed = EXCLUDED.viewed,
                    other = EXCLUDED.other,
                    category = EXCLUDED.category,
                    translation_text = EXCLUDED.translation_text,
                    short_text = EXCLUDED.short_text;
            """, (data.url, data.parsed_at, data.title, data.original_text, data.article_date, data.status, data.viewed, data.other, data.category, data.translation_text, data.short_text))
            conn.commit()
        return {"status": "success", "message": "Данные успешно сохранены"}
    except Exception as e:
        if conn:
            conn.rollback()
        raise HTTPException(status_code=500, detail=f"Ошибка при сохранении данных: {e}")
    finally:
        if conn:
            conn.close()


@app.post("/update_viewed_status", summary="Обновляет поле viewed")
def update_viewed_status(url: str, viewed: bool):
    """
    Обновляет поле 'viewed' записи в БД по заданному URL.
    """
    conn = None
    try:
        conn = get_connection()
        with conn.cursor() as cursor:
            cursor.execute(
                """
                UPDATE url
                SET viewed = %s
                WHERE url = %s
                """,
                (viewed, url)
            )
            if cursor.rowcount == 0:
                # Если запись не найдена
                raise HTTPException(status_code=404, detail="Запись с указанным URL не найдена")
        conn.commit()
    except Exception as e:
        if conn:
            conn.rollback()
        raise HTTPException(status_code=500, detail=f"Ошибка при сохранении данных: {e}")
    finally:
        if conn:
            conn.close()

    return {"status": "success", "message": "Статус просмотра успешно обновлен"}

@app.post("/update_status_status", summary="Обновляет поле status")
def update_status_status(url: str, status: bool):
    """
    Обновляет поле 'status' записи в БД по заданному URL.
    """
    conn = None
    try:
        conn = get_connection()
        with conn.cursor() as cursor:
            cursor.execute(
                """
                UPDATE url
                SET status = %s
                WHERE url = %s
                """,
                (status, url)
            )
            if cursor.rowcount == 0:
                # Если запись не найдена
                raise HTTPException(status_code=404, detail="Запись с указанным URL не найдена")
        conn.commit()
    except Exception as e:
        if conn:
            conn.rollback()
        raise HTTPException(status_code=500, detail=f"Ошибка при сохранении данных: {e}")
    finally:
        if conn:
            conn.close()

    return {"status": "success", "message": "Статус просмотра успешно обновлен"}


@app.get("/check_url_exists", summary="Проверяет url")
def check_url_exists(url: str):
    """
    Проверяет, есть ли указанный URL в базе данных.
    Возвращает true, если есть, иначе false.
    """
    conn = None
    try:
        conn = get_connection()
        with conn.cursor() as cursor:
            cursor.execute(
                "SELECT 1 FROM url WHERE url = %s LIMIT 1",
                (url,)
            )
            result = cursor.fetchone()
            return {"exists": bool(result)}
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Ошибка при проверке: {e}")
    finally:
        if conn:
            conn.close()

@app.get("/records", summary="Получить записи из БД с пагинацией", response_model=List[ParsedData])
def get_records(offset: int = Query(0, ge=0), limit: int = Query(10, ge=1, le=100)):
    """
    Возвращает записи из таблицы url с учетом offset и limit.
    """
    conn = None
    try:
        conn = get_connection()
        with conn.cursor(cursor_factory=psycopg2.extras.DictCursor) as cur:
            cur.execute("""
                SELECT url, parsed_at, title, original_text, article_date, status, viewed, other, category, translation_text, short_text
                FROM url
                ORDER BY parsed_at DESC NULLS LAST
                OFFSET %s LIMIT %s
            """, (offset, limit))
            rows = cur.fetchall()
            results = [dict(row) for row in rows]
            return results
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Ошибка при получении записей из БД: {e}")
    finally:
        if conn:
            conn.close()

@app.get("/records_all/count", summary="Получить общее количество записей")
def get_records_count(item: str = "default"):
    """
    Возвращает общее количество записей в таблице.
    """
    conn = None
    try:
        conn = get_connection()
        with conn.cursor() as cur:
            if item == "viewed":
                cur.execute("SELECT COUNT(*) FROM url WHERE viewed = true")
            elif item == "status":
                cur.execute("SELECT COUNT(*) FROM url WHERE status = true")
            elif item == "time":
                cur.execute("SELECT COUNT(*) FROM url")
            else:
                cur.execute("SELECT COUNT(*) FROM url")
            result = cur.fetchone()
            return {"count": result[0]}
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Ошибка при получении количества: {e}")
    finally:
        if conn:
            conn.close()
            
@app.get("/poisk/count", summary="Получить количество результатов поиска")
def get_poisk_count(query: str, item: str = "default"):
    conn = None
    try:
        conn = get_connection()
        with conn.cursor() as cur:
            search_pattern = f"%{query}%"
            base_query = """SELECT COUNT(*) FROM url WHERE (
                title ILIKE %s OR original_text ILIKE %s OR translation_text ILIKE %s 
                OR short_text ILIKE %s OR url ILIKE %s OR category ILIKE %s OR other ILIKE %s
            )"""
            params = [search_pattern] * 7
            
            if item == "viewed":
                base_query += " AND viewed = true"
            elif item == "status":
                base_query += " AND status = true"
            
            cur.execute(base_query, params)
            result = cur.fetchone()
            return {"count": result[0]}
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Ошибка при получении количества: {e}")
    finally:
        if conn:
            conn.close()

@app.get("/poisk", summary="Поиск с пагинацией")
def poisk(query: str, offset: int = Query(0, ge=0), limit: int = Query(10, ge=1, le=100), item: str = "default"):
    conn = None
    try:
        conn = get_connection()
        with conn.cursor(cursor_factory=psycopg2.extras.DictCursor) as cur:
            search_pattern = f"%{query}%"
            base_query = """SELECT * FROM url WHERE (
                title ILIKE %s OR original_text ILIKE %s OR translation_text ILIKE %s 
                OR short_text ILIKE %s OR url ILIKE %s OR category ILIKE %s OR other ILIKE %s
            )"""
            params = [search_pattern] * 7
            
            if item == "viewed":
                base_query += " AND viewed = true"
            elif item == "status":
                base_query += " AND status = true"
            
            base_query += " ORDER BY article_date DESC OFFSET %s LIMIT %s"
            params.extend([offset, limit])
            
            cur.execute(base_query, params)
            rows = cur.fetchall()
            results = [dict(row) for row in rows]
            return results
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Ошибка при поиске: {e}")
    finally:
        if conn:
            conn.close()

@app.get("/records_all", summary="Получить все записи из БД + сортирует + пагинация", response_model=List[ParsedData])
def get_records(item: str = "default", offset: int = Query(0, ge=0), limit: int = Query(10, ge=1, le=100)):
    """
    Возвращает записи из таблицы url с учетом.
    """
    conn = None
    try:
        conn = get_connection()
        with conn.cursor(cursor_factory=psycopg2.extras.DictCursor) as cur:
            print(item)
            if item == "time":
                cur.execute("""
                    SELECT * FROM url
                    ORDER BY viewed ASC, parsed_at DESC
                    OFFSET %s LIMIT %s  
                """, (offset, limit))
            elif item == "viewed":
                cur.execute("""
                   SELECT * FROM url
                   WHERE viewed = true
                   ORDER BY article_date DESC
                   OFFSET %s LIMIT %s
                """, (offset, limit))    
            elif item == "status":
                cur.execute("""
                    SELECT * FROM url
                    WHERE status = true
                    ORDER BY parsed_at DESC
                    OFFSET %s LIMIT %s
                """, (offset, limit))
            else:
                cur.execute("""
                    SELECT * FROM url
                    ORDER BY viewed ASC, article_date DESC
                    OFFSET %s LIMIT %s
                """, (offset, limit))
            rows = cur.fetchall()
            results = [dict(row) for row in rows]
            # urls = [item['parsed_at'] for item in results]
            return results
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Ошибка при получении записей из БД: {e}")
    finally:
        if conn:
            conn.close()
            
# Запуск сервера для теста
if __name__ == "__main__":
    uvicorn.run("main:app", port=8002, reload=True)