/*
 * $Id:$
 *
 * This file is part of the Cloud Services Integration Platform (CSIP),
 * a Model-as-a-Service framework, API and application suite.
 *
 * 2012-2022, Olaf David and others, OMSLab, Colorado State University.
 *
 * OMSLab licenses this file to you under the MIT license.
 * See the LICENSE file in the project root for more information.
 */
package csip.utils;

import csip.api.server.ServiceException;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import javax.xml.bind.DatatypeConverter;

/**
 * Generic validation methods..
 *
 * @author od
 */
public class Validation {

  static final double CONUS_NORTH = 49.3457868; // CONUS_NORTH lat
  static final double CONUS_WEST = -124.7844079; // CONUS_WEST long
  static final double CONUS_EAST = -66.9513812; // CONUS_EAST long
  static final double CONUS_SOUTH = 24.7433195; // CONUS_SOUTH lat
  static final int MAX_COKEY = 99999999; // Cokeys aren't longer than 8 digits
  static final int MAX_MUKEY = 9999999; //  Mukeys aren't longer than 7 digits


  /**
   * checks for the lat/lon to be in CONUS.
   *
   * @param lat latitude
   * @param lon longitude
   * @throws IllegalArgumentException if outside.
   */
  public static void checkCONUS(double lat, double lon) {
    if ((CONUS_SOUTH <= lat) && (lat <= CONUS_NORTH)
        && (CONUS_WEST <= lon) && (lon <= CONUS_EAST))
      return;
    
    throw new IllegalArgumentException("Invalid CONUS coordinates: " + lat + "/" + lon);
  }


  /**
   * Check for valid Cokey.
   *
   * @param cokey the Cokey number as string, e.g. "12856507"
   */
  public static void checkCokey(String cokey) {
    if (cokey == null || cokey.isEmpty())
      throw new IllegalArgumentException("No Cokey value:");
    
    try {
      checkCokey(new Integer(cokey));
    } catch (NumberFormatException E) {
      throw new IllegalArgumentException("Illegal Cokey value: " + cokey);
    }
  }


  /**
   * Check for valid Cokey.
   *
   * @param cokey the Cokey as number.
   * @throws IllegalArgumentException if invalid
   */
  public static void checkCokey(Number cokey) {
    if (cokey == null)
      throw new IllegalArgumentException("No Cokey value:");
    
    int val = cokey.intValue();
    if (val >= 1 && val <= MAX_COKEY)
      return;
    throw new IllegalArgumentException("Invalid Cokey: " + cokey);
  }


  /**
   * Check for valid CMZ.
   *
   * @param cmz the CMZ number as string, e.g. "12' or "4.1", no CMZ prefix
   * @throws IllegalArgumentException 74 PB 73 HI 72 AK 04.1 37.1 38.1 75 PR
   * 15.1
   *
   */
  public static void checkCMZ(String cmz) {
    if (cmz == null || cmz.isEmpty())
      throw new IllegalArgumentException("No CMZ value:");
    
    cmz = cmz.trim();
    if (cmz.indexOf(' ') > 0) {
      if (cmz.equals("72 AK") || cmz.equals("73 HI")
          || cmz.equals("74 PB") || cmz.equals("75 PR"))
        return;
    }
    try {
      checkCMZ(new Double(cmz));
    } catch (NumberFormatException E) {
      throw new IllegalArgumentException("Illegal CMZ value: " + cmz);
    }
  }


  /**
   * Check for valid CMZ.
   *
   * @param cmz the CMZ as number.
   * @throws IllegalArgumentException if invalid
   */
  public static void checkCMZ(Number cmz) {
    if (cmz == null)
      throw new IllegalArgumentException("No CMZ value:");
    
    float val = cmz.floatValue();
    if (val == 4.1f || val == 15.1f || val == 37.1f || val == 38.1f)
      return;
    
    if (val >= 1 && val <= 71 && (val == (int) val))
      return;
    
    throw new IllegalArgumentException("Invalid CMZ: " + cmz);
  }


  /**
   * Check for valid Mukey.
   *
   * @param mukey the Mukey number as string, e.g. "2955448"
   */
  public static void checkMukey(String mukey) {
    if (mukey == null || mukey.isEmpty())
      throw new IllegalArgumentException("No Mukey value:");
    
    try {
      checkCokey(new Integer(mukey));
    } catch (NumberFormatException E) {
      throw new IllegalArgumentException("Illegal Mukey value: " + mukey);
    }
  }


  /**
   * Check for valid Mukey.
   *
   * @param mukey the Mukey as number.
   * @throws IllegalArgumentException if invalid
   */
  public static void checkMukey(Number mukey) {
    if (mukey == null)
      throw new IllegalArgumentException("No Mukey value:");
    
    int val = mukey.intValue();
    if (val >= 1 && val <= MAX_MUKEY)
      return;
    
    throw new IllegalArgumentException("Invalid Mukey: " + mukey);
  }


  public static void checkString(String actual, String... expected) {
    for (String exp : expected) {
      if (actual.equals(exp))
        return;
    }
    throw new IllegalArgumentException("expected " + Arrays.toString(expected)
        + ", but given: " + actual);
  }


  public static void checkStringIgnoreCase(String actual, String... expected) {
    for (String exp : expected) {
      if (actual.equalsIgnoreCase(exp))
        return;
    }
    throw new IllegalArgumentException("expected " + Arrays.toString(expected)
        + ", but given: " + actual);
  }
  
  public static String digest(String s, String algorithm) {
    try {
      return DatatypeConverter.printHexBinary(MessageDigest.getInstance(algorithm)
          .digest(s.getBytes("UTF-8"))).toLowerCase();
    } catch (NoSuchAlgorithmException | UnsupportedEncodingException E) {
      return null;
    }
  }

}