import os
import json
from pathlib import Path
from dotenv import load_dotenv
from logger_manager import get_logger

# ============================================================================
load_dotenv()

logger = get_logger("hana")

CONFIG_FILE = Path(__file__).parent / "config.json"

_conn = None
_cfg_hana = None

# ============================================================================
def _cargar_config():
    global _cfg_hana
    if _cfg_hana is None:
        with open(CONFIG_FILE, encoding="utf-8") as f:
            data = json.load(f)
        _cfg_hana = data["hana"]
    return _cfg_hana

# ============================================================================
def get_connection():
    global _conn
    if _conn is None:
        try:
            cfg = _cargar_config()
            from hdbcli import dbapi
            _conn = dbapi.connect(
                address=cfg["host"],
                port=cfg["port"],
                user=cfg["user"],
                password=cfg["password"]
            )
        except Exception as e:
            logger.error(f"   ❌ Error conectando a HANA: {e}")
            return None
    return _conn

# ============================================================================
def _nombres_rucs(rucs) -> str:
    if not rucs:
        return ""
    return ",".join(f"'{r}'" for r in rucs)

# ============================================================================
def obtener_pendientes(schema: str, rucs: list[str], days: int = 240) -> list[dict]:
    conn = get_connection()
    if not conn:
        return []

    filtro_rucs = _nombres_rucs(rucs)
    cond_rucs = f"AND T0.\"LicTradNum\" IN ({filtro_rucs})" if filtro_rucs else ""

    try:
        query = f"""
        SELECT T0."DocNum", T0."DocEntry", TO_VARCHAR(T0."DocDate",'YYYY-MM-DD') "DocDate"
        , TO_VARCHAR(T0."TaxDate",'YYYY-MM-DD') "TaxDate", T0."CardName", T0."FolioPref", T0."FolioNum", T0."Indicator", T0."DocCur"
        , CASE T0."DocCur" WHEN 'SOL' THEN T0."DocTotal" ELSE T0."DocTotalFC" END "DocTotal"
        , T0."U_PGX_REPIMP" "urlPDF"
        , T0."U_PGX_PDF" "tienePDF"
        , T0."U_PGX_REPIMPXML" "urlXML"
        , T0."U_PGX_XML" "tieneXML"
        , T0."LicTradNum"
        FROM "{schema}".OPCH T0
        WHERE T0."CANCELED" = 'N'
        {cond_rucs}
        AND T0."Indicator" IN ('01', '02','08')
        AND (IFNULL(T0."U_PGX_PDF",'N') = 'N' OR IFNULL(T0."U_PGX_XML",'N') = 'N')
        AND T0."CreateDate" >= ADD_DAYS(CURRENT_DATE, -{days});
        """
        cursor = conn.cursor()
        cursor.execute(query)
        columns = [desc[0] for desc in cursor.description]
        rows = cursor.fetchall()
        cursor.close()
        result = [dict(zip(columns, row)) for row in rows]
        for d in result:
            d["schema"] = schema
        return result
    except Exception as e:
        logger.error(f"   ❌ Error en query HANA: {e}")
        return []

# ============================================================================
def marcar_pdf_descargado(schema: str, docentry: int, url: str, ruta: str):
    conn = get_connection()
    if not conn:
        return False
    try:
        cursor = conn.cursor()
        cursor.execute(f"""
            UPDATE "{schema}".OPCH
            SET "U_PGX_PDF" = 'Y'
            WHERE "DocEntry" = ?
        """, (docentry,))
        conn.commit()
        cursor.close()
        return True
    except Exception as e:
        logger.error(f"   ❌ Error actualizando PDF HANA: {e}")
        return False

# ============================================================================
def marcar_xml_descargado(schema: str, docentry: int, url: str, ruta: str):
    conn = get_connection()
    if not conn:
        return False
    try:
        cursor = conn.cursor()
        cursor.execute(f"""
            UPDATE "{schema}".OPCH
            SET "U_PGX_XML" = 'Y'
            WHERE "DocEntry" = ?
        """, (docentry,))
        conn.commit()
        cursor.close()
        return True
    except Exception as e:
        logger.error(f"   ❌ Error actualizando XML HANA: {e}")
        return False

# ============================================================================
def cerrar_conexion():
    global _conn
    if _conn:
        try:
            _conn.close()
        except:
            pass
        _conn = None

# ============================================================================
if __name__ == "__main__":
    logger.info("=" * 60)
    logger.info("📋 HANA MANAGER - Prueba")
    logger.info("=" * 60)
    with open(CONFIG_FILE, encoding="utf-8") as f:
        cfg = json.load(f)
    for emp in cfg["empresas"]:
        logger.info(f"\n🏢 Empresa: {emp['nombre']} (schema={emp['schema']})")
        docs = obtener_pendientes(emp["schema"], cfg.get("rucs", []), cfg.get("consulta", {}).get("dias", 240))
        logger.info(f"   📄 Documentos pendientes: {len(docs)}")
        for d in docs[:5]:
            logger.info(f"      DocEntry={d['DocEntry']} DocNum={d['DocNum']} "
                    f"DocDate={d['DocDate']} Indicator={d['Indicator']} "
                    f"Folio={d['FolioPref']}-{d['FolioNum']} "
                    f"PDF={d['tienePDF']} XML={d['tieneXML']}")
        if len(docs) > 5:
            logger.info(f"      ... y {len(docs) - 5} más")
# ============================================================================