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"])


@router.get("/cups")
async def find_cups(request: Request, user: dict = Depends(get_current_user)):
    conn = get_connection()
    cfg = {r["key"]: r["value"] for r in conn.execute("SELECT * FROM config").fetchall()}
    conn.close()

    fb, ok, msg = get_firebird_from_config(cfg)
    if not ok:
        return JSONResponse({"error": msg})

    results = {}

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

    # Probar cada posible campo clave contra COD_EXAMEN de RELACION
    candidatos = ["COD_ITEM", "CODITEM", "CODIGO", "COD", "ID", "CODARTICULO", "ARTICULO"]
    joins_ok = {}
    for campo in candidatos:
        if campo not in cols_item:
            continue
        ok2, _, rows2 = fb.execute_query(
            f"SELECT FIRST 3 rel.COD_EXAMEN, i.CUPS_DETALLE "
            f"FROM RELACION rel "
            f"LEFT JOIN ITEM i ON TRIM(i.{campo}) = TRIM(rel.COD_EXAMEN) "
            f"WHERE i.CUPS_DETALLE IS NOT NULL AND TRIM(i.CUPS_DETALLE)<>'' "
        )
        if ok2 and rows2:
            joins_ok[campo] = rows2
            break
        else:
            joins_ok[campo] = "sin resultados"
    results["join_pruebas"] = joins_ok

    # Primera fila de ITEM sin JOIN
    ok3, err3, rows3 = fb.execute_query("SELECT FIRST 1 i.* FROM ITEM i")
    results["item_primera_fila"] = rows3[0] if (ok3 and rows3) else f"error: {err3}"

    fb.disconnect()
    return JSONResponse(results)