package com.workbenchclassic;

import org.json.JSONArray;
import org.json.JSONObject;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.HashMap;

import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

/**
 * UpdateStation performs database insert depending on DB vendor (MSSQL or
 * Oracle).
 */
@Path("/updateParts")
public class UpdatePart {

    /** Our DB service for queries (JNDI, etc.). */
    private final DBService dbService = new DBService("dsTranNJTA");

    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public Response doUpdate(String jsonBody) {
        try {
            // 1) JSON parsen
            JSONObject json = new JSONObject(jsonBody);
            String station = json.getString("station");
            JSONArray dataArray = json.getJSONArray("data");

            // 2) DB-Vendor abfragen
            String vendor = dbService.getDatabaseProductName();
            System.out.println("Aktueller DB-Vendor: " + vendor);

            GetMetadata metadata = new GetMetadata();
            String extPlantResponseString = metadata.getExtPlantJson(station);
            JSONObject extPlantResponse = new JSONObject(extPlantResponseString);

            String errorCode = extPlantResponse.optString("errorCode", "0");
            if (!"0".equals(errorCode)) {
                // Return an HTTP 400 or 500 with that JSON
                return Response.status(Response.Status.BAD_REQUEST).entity(extPlantResponse.toString()).build();
            }
            // 3) werknummer ermitteln

            // werkResultJson könnte z.B. so aussehen:
            // {"errorCode":"0","errorMessage":"Done","data":"[{\"werknummer\":\"ABC\"}]"}

            String werkData = extPlantResponse.optString("data", "[]");
            JSONArray werkArr = new JSONArray(werkData);

            String WERK_NR = null;
            String COMPANY_NO = null;
            String CLIENT_NO = null;
            if (werkArr.length() > 0) {
                JSONObject row = werkArr.getJSONObject(0);
                WERK_NR = row.optString("ext_company_nr", null);
                COMPANY_NO = row.optString("werk_nr", null);
                CLIENT_NO = row.optString("client_nr", null);
            }

            System.out.println("Ermittelte werknummer: " + COMPANY_NO);

            boolean isMSSQL = "Microsoft SQL Server".equals(vendor);
            boolean isOracle = "Oracle".equals(vendor);

            // 4) ZUERST den tran_idocstatus-Eintrag anlegen
            if (isMSSQL) {
                String insertIdocstatusMSSQL = "INSERT INTO xtran.tran_idocstatus (ID, DATE_CREATION, ewstatus, errorcode, content_type, source) VALUES ( (NEXT VALUE FOR xtran.seq_tranidocstatus), getdate(), 1, 0, 9, 0)";
                dbService.dbConnect(insertIdocstatusMSSQL);
            } else if (isOracle) {
                String insertIdocstatusOracle = "INSERT INTO tran.tran_idocstatus (ID, DATE_CREATION, ewstatus, errorcode, content_type, source) VALUES ( tran.seq_tranidocstatus.nextval, sysdate, 1, 0, 9, 0)";
                dbService.dbConnect(insertIdocstatusOracle);
            } else {
                System.out.println("DB-Vendor nicht implementiert: " + vendor);
            }

            // 5) Für JEDES Element in "data" => Insert in material
            Connection conn = dbService.getConnection();
            conn.setAutoCommit(false); // Transaktion starten

            try {
                for (int i = 0; i < dataArray.length(); i++) {
                    JSONObject obj = dataArray.getJSONObject(i);
                    insertMaterial(conn, obj, CLIENT_NO, WERK_NR, COMPANY_NO, isMSSQL, isOracle);
                }
                conn.commit(); // Transaktion bestätigen
            } catch (SQLException e) {
                conn.rollback(); // Transaktion rückgängig machen
                throw e; // Weiterleitung des Fehlers
            } finally {
                conn.setAutoCommit(true); // Auto-Commit wieder aktivieren
                conn.close(); // Verbindung schließen
            }

            // 6) Erfolgreich fertig
            JSONObject response = new JSONObject();
            response.put("status", "ok");
            response.put("message", "Daten wurden erfolgreich verarbeitet.");
            return Response.ok(response.toString()).build();

        } catch (Exception e) {
            e.printStackTrace();
            JSONObject error = new JSONObject();
            error.put("status", "error");
            error.put("message", e.getMessage());
            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(error.toString()).build();
        }
    }

    private void insertMaterial(Connection conn, JSONObject obj, String clientno, String plantno, String werknummer,
            boolean isMSSQL, boolean isOracle)
            throws SQLException {
        String sql;
        if (isMSSQL) {
            sql = "INSERT INTO xtran.tran_material (TRAN_ID, ATTRIB_ID, IDOC_ID, MATERIAL_NO, MATERIAL_DESC, UNIT, PRODUCT, "
                    +
                    "INFO1, INFO2, INFO3, SOURCE, STATUS, CLIENT_NO, COMPANY_NO, PLANT_NO, MATERIAL_GRP_TYPE, MATERIAL_GRP_NO, APS_TRANSFER) "
                    +
                    "VALUES (NEXT VALUE FOR xtran.SEQ_TRANMATERIAL, -1, (SELECT MAX(id) FROM xtran.tran_idocstatus), ?,?,?,?,'', '', '', 0, 0, ? ,?,?, ?, ?, 0)";
        } else if (isOracle) {
            sql = "INSERT INTO tran.tran_material ("
                    + "  TRAN_ID, ATTRIB_ID, IDOC_ID, MATERIAL_NO, MATERIAL_DESC, UNIT, PRODUCT,"
                    + "  INFO1, INFO2, INFO3, SOURCE, STATUS, CLIENT_NO, COMPANY_NO, PLANT_NO,"
                    + "  MATERIAL_GRP_TYPE, MATERIAL_GRP_NO, APS_TRANSFER"
                    + ") VALUES ("
                    + "  tran.SEQ_TRANMATERIAL.nextVal," // TRAN_ID per Sequence
                    + "  -1," // ATTRIB_ID fest -1 (wie im MSSQL)
                    + "  (SELECT MAX(id) FROM tran.tran_idocstatus)," // IDOC_ID
                    + "  ?, ?, ?, ?," // MATERIAL_NO, MATERIAL_DESC, UNIT, PRODUCT
                    + "  '', '', ''," // INFO1, INFO2, INFO3
                    + "  0, 0," // SOURCE, STATUS
                    + "  ?, ?, ?," // CLIENT_NO, COMPANY_NO, PLANT_NO
                    + "  ?, ?," // MATERIAL_GRP_TYPE, MATERIAL_GRP_NO
                    + "  0" // APS_TRANSFER
                    + ")";
        } else {
            throw new SQLException("DB-Vendor nicht implementiert");
        }

        try (PreparedStatement ps = conn.prepareStatement(sql)) {
            ps.setString(1, obj.getString("MATERIAL_NO"));
            ps.setString(2, obj.getString("MATERIAL_DESC"));

            String unit = obj.getString("UNIT");
            try {
                // Versuchen, den UNIT-Wert als Integer zu parsen
                Integer.parseInt(unit);
                ps.setString(3, unit); // Wenn es ein Integer ist, direkt einfügen
            } catch (NumberFormatException e) {
                // Wenn es kein Integer ist, das Mapping anwenden
                String unitLower = unit.toLowerCase();
                HashMap<String, String> unitMapping = new HashMap<>();
                unitMapping.put("mm", "11000");
                unitMapping.put("zoll", "11001");
                unitMapping.put("stk", "11002");
                unitMapping.put("pcs", "11002");
                unitMapping.put("qty", "11002");
                unitMapping.put("cm", "11003");
                unitMapping.put("m", "11004");
                unitMapping.put("g", "11005");
                unitMapping.put("kg", "11006");
                unitMapping.put("ml", "11007");
                unitMapping.put("l", "11008");

                String mappedUnit = unitMapping.get(unitLower);
                if (mappedUnit != null) {
                    ps.setString(3, mappedUnit); // Mapping-Wert verwenden
                } else {
                    ps.setString(3, unit); // Originalwert verwenden, wenn kein Mapping gefunden wurde
                }
            }

            ps.setString(4, obj.getString("PRODUCT"));
            ps.setString(5, clientno);
            ps.setString(6, plantno);
            ps.setString(7, werknummer);
            ps.setString(8, obj.getString("MATERIAL_GRP_TYPE"));
            ps.setString(9, obj.getString("MATERIAL_GRP_NO"));
            ps.executeUpdate();
        } catch (SQLException e) {
            // Fehlerbehandlung
            e.printStackTrace();
        }
    }
}