from fastapi import APIRouter, Request, Depends
from fastapi.responses import JSONResponse
from app.database import get_connection
from app.auth import get_current_user
from app.services.firebird_service import get_firebird_from_config

router = APIRouter(prefix="/debug-fb", tags=["debug"])


def _cfg():
    conn = get_connection()
    c = {r["key"]: r["value"] for r in conn.execute("SELECT * FROM config").fetchall()}
    conn.close()
    return c


@router.get("/cups")
async def find_cups(request: Request, user: dict = Depends(get_current_user)):
    cfg = _cfg()
    fb, ok, msg = get_firebird_from_config(cfg)
    if not ok:
        return JSONResponse({"error": msg})

    results = {}

    # 0. Tablas/campos que contengan "CUP"
    ok0, _, rows0 = fb.execute_query("""
        SELECT TRIM(f.RDB$RELATION_NAME) AS tabla, TRIM(f.RDB$FIELD_NAME) AS campo
        FROM RDB$RELATION_FIELDS f
        WHERE f.RDB$FIELD_NAME LIKE '%CUP%'
        ORDER BY 1, 2
    """)
    results["campos_cup_en_bd"] = rows0 if ok0 else []

    # 1. Columnas de ITEM
    ok1, err1, rows1 = fb.execute_query("""
        SELECT TRIM(f.RDB$FIELD_NAME) AS campo
        FROM RDB$RELATION_FIELDS f
        WHERE TRIM(f.RDB$RELATION_NAME) = 'ITEM'
        ORDER BY f.RDB$FIELD_POSITION
    """)
    results["columnas_item"] = [r["campo"] for r in rows1] if ok1 else f"error: {err1}"

    # 2. Muestra de ITEM para el examen CH4
    ok3, err3, rows3 = fb.execute_query(
        "SELECT FIRST 1 i.* FROM ITEM i WHERE TRIM(i.CODIGO) = :cod",
        {"cod": "CH4"}
    )
    if ok3 and rows3:
        results["item_ch4_por_codigo"] = rows3[0]
    else:
        # Intentar con otro campo
        ok3b, err3b, rows3b = fb.execute_query(
            "SELECT FIRST 3 i.* FROM ITEM i WHERE i.CUPS_DETALLE IS NOT NULL AND TRIM(i.CUPS_DETALLE) <> ''"
        )
        results["item_muestra_con_cups"] = rows3b if ok3b else f"error: {err3b}"

    # 3. Descuentos en RELACION
    ok4, _, rows4 = fb.execute_query("""
        SELECT FIRST 5
            r.NUM_FACTURA, r.PREFIJO, rel.COD_EXAMEN, rel.DESCUENTO, rel.PRECIO
        FROM RELACION rel
        JOIN RECEPCION r ON r.IDRECEPCION = rel.IDRECEPCION
        WHERE rel.DESCUENTO > 0
        ORDER BY r.FECHA_RECEPCION DESC
    """)
    results["servicios_con_descuento"] = rows4 if ok4 else []

    fb.disconnect()
    return JSONResponse(results)