import requests
from bs4 import BeautifulSoup
import sqlite3
import time
import re
import os
from urllib.parse import unquote

# Base de datos - ruta directa desde C:\Autopartes
DB_PATH = "vehicle_database/vehicle_database.db"

BASE_URL = "https://www.rockauto.com/en/catalog"

MISSING_YEARS = [
    2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994,
    1993, 1992, 1991, 1990, 1989, 1988, 1987, 1986, 1985, 1984,
    1983, 1982, 1981, 1980, 1979, 1978, 1977, 1976, 1975
]

session = requests.Session()
session.headers.update({
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
    'Accept': 'text/html,application/xhtml+xml',
})

def clean_name(name):
    name = unquote(name.replace('+', ' '))
    return re.sub(r'\s+', ' ', name).strip().upper()

def get_soup(url, retries=3):
    for attempt in range(retries):
        try:
            time.sleep(0.5)
            response = session.get(url, timeout=15)
            if response.status_code == 200:
                return BeautifulSoup(response.content, 'html.parser')
            elif response.status_code == 403:
                print("\n    [!] BLOQUEADO (403) - Cambia el VPN!")
                return None
        except Exception as e:
            if attempt < retries - 1:
                time.sleep(3)
            else:
                print(f"\n    Error: {e}")
    return None

def get_models(brand, year):
    brand_url = brand.lower()
    soup = get_soup(f"{BASE_URL}/{brand_url},{year}")
    if not soup:
        return []

    models = set()
    for link in soup.find_all('a', href=True):
        match = re.search(rf'/catalog/{brand_url},{year},([^,/]+)', link['href'], re.I)
        if match:
            model = clean_name(match.group(1))
            if model and not model.isdigit() and len(model) > 1:
                models.add(model)
    return sorted(models)

def get_engines(brand, year, model):
    brand_url = brand.lower()
    model_url = model.lower().replace(' ', '+')
    soup = get_soup(f"{BASE_URL}/{brand_url},{year},{model_url}")
    if not soup:
        return ['STANDARD']

    engines = set()
    for link in soup.find_all('a', href=True):
        match = re.search(rf'/catalog/{brand_url},{year},{re.escape(model_url)},([^,/]+)', link['href'], re.I)
        if match:
            engine = clean_name(match.group(1))
            if engine and re.search(r'\d+\.?\d*L|V\d|I\d|HYBRID|ELECTRIC|DIESEL', engine, re.I):
                engines.add(engine)
    return sorted(engines) if engines else ['STANDARD']

def save_to_db(conn, brand, year, model, engine):
    cursor = conn.cursor()
    try:
        cursor.execute("INSERT OR IGNORE INTO brands (name) VALUES (?)", (brand,))
        cursor.execute("SELECT id FROM brands WHERE name = ?", (brand,))
        brand_id = cursor.fetchone()[0]

        cursor.execute("INSERT OR IGNORE INTO years (year) VALUES (?)", (year,))
        cursor.execute("SELECT id FROM years WHERE year = ?", (year,))
        year_id = cursor.fetchone()[0]

        cursor.execute("INSERT OR IGNORE INTO engines (name) VALUES (?)", (engine,))
        cursor.execute("SELECT id FROM engines WHERE name = ?", (engine,))
        engine_id = cursor.fetchone()[0]

        cursor.execute("INSERT OR IGNORE INTO models (brand_id, name) VALUES (?, ?)", (brand_id, model))
        cursor.execute("SELECT id FROM models WHERE brand_id = ? AND name = ?", (brand_id, model))
        model_id = cursor.fetchone()[0]

        cursor.execute(
            "INSERT OR IGNORE INTO model_year_engine (model_id, year_id, engine_id) VALUES (?, ?, ?)",
            (model_id, year_id, engine_id)
        )
        return cursor.rowcount > 0
    except:
        return False

def get_existing_years(conn, brand):
    cursor = conn.cursor()
    cursor.execute("""
        SELECT DISTINCT y.year FROM years y
        JOIN model_year_engine mye ON y.id = mye.year_id
        JOIN models m ON mye.model_id = m.id
        JOIN brands b ON m.brand_id = b.id
        WHERE b.name = ?
    """, (brand,))
    return set(row[0] for row in cursor.fetchall())

def main():
    brand = "TOYOTA"

    print("=" * 50)
    print("  SCRAPER TOYOTA - WINDOWS")
    print("  3 anos por lote, 60 seg pausa para VPN")
    print("=" * 50)

    if not os.path.exists(DB_PATH):
        print(f"\n[ERROR] No encuentro: {DB_PATH}")
        print("Asegurate de correr desde C:\\Autopartes")
        input("Presiona ENTER para salir...")
        return

    conn = sqlite3.connect(DB_PATH)
    existing = get_existing_years(conn, brand)
    years_to_do = [y for y in MISSING_YEARS if y not in existing]

    if not years_to_do:
        print("\nTodos los anos ya estan!")
        conn.close()
        return

    print(f"\nFaltan {len(years_to_do)} anos: {years_to_do[0]} a {years_to_do[-1]}")

    batches = [years_to_do[i:i+3] for i in range(0, len(years_to_do), 3)]
    print(f"Lotes: {len(batches)}")
    input("\nPresiona ENTER para comenzar...")

    total_saved = 0

    for batch_num, batch in enumerate(batches, 1):
        print(f"\n{'='*50}")
        print(f"LOTE {batch_num}/{len(batches)}: {batch}")
        print("="*50)

        for year in batch:
            print(f"\n[{year}] ", end="", flush=True)
            models = get_models(brand, year)
            print(f"{len(models)} modelos")

            for model in models:
                engines = get_engines(brand, year, model)
                for engine in engines:
                    if save_to_db(conn, brand, year, model, engine):
                        total_saved += 1
                    print(f"  {model} - {engine}")

        conn.commit()
        print(f"\n>> Guardado! Total nuevos: {total_saved}")

        if batch_num < len(batches):
            print(f"\n{'*'*50}")
            print("  PAUSA 60 SEG - CAMBIA EL VPN AHORA!")
            print(f"  Faltan {len(batches) - batch_num} lotes")
            print("*"*50)

            for s in range(60, 0, -1):
                print(f"\r  Continua en {s}s...  ", end="", flush=True)
                time.sleep(1)
            print()

    conn.close()
    print(f"\n{'='*50}")
    print(f"  LISTO! Guardados: {total_saved} vehiculos nuevos")
    print("="*50)
    input("Presiona ENTER para salir...")

if __name__ == "__main__":
    main()