/*
    * Copyright (c) 2006 JMockit developers
    * This file is subject to the terms of the MIT license (see LICENSE.txt).
    */
   package mockit.internal.expectations.argumentMatching;
   
   import edu.umd.cs.findbugs.annotations.NonNull;
   import edu.umd.cs.findbugs.annotations.Nullable;
   
  import java.lang.reflect.Array;
  import java.lang.reflect.Method;
  
  import mockit.internal.util.ObjectMethods;
  
  public final class ArgumentMismatch {
      @NonNull
      private final StringBuilder out = new StringBuilder(50);
      @Nullable
      private String parameterType;
  
      @Nullable
      public String getParameterType() {
          return parameterType;
      }
  
      @Override
      public String toString() {
          return out.toString();
      }
  
      @NonNull
      public ArgumentMismatch append(char c) {
          out.append(c);
          return this;
      }
  
      @NonNull
      public ArgumentMismatch append(int i) {
          out.append(i);
          return this;
      }
  
      @NonNull
      public ArgumentMismatch append(double d) {
          out.append(d);
          return this;
      }
  
      @NonNull
      public ArgumentMismatch append(@Nullable CharSequence str) {
          out.append(str);
          return this;
      }
  
      public void appendFormatted(@Nullable String parameterTypeName, @Nullable Object argumentValue,
              @Nullable ArgumentMatcher<?> matcher) {
          if (matcher == null) {
              appendFormatted(argumentValue);
          } else {
              parameterType = parameterTypeName;
              matcher.writeMismatchPhrase(this);
          }
      }
  
      @SuppressWarnings("OverlyComplexMethod")
      void appendFormatted(@Nullable Object value) {
          if (value == null) {
              out.append("null");
          } else if (value instanceof CharSequence) {
              appendCharacters((CharSequence) value);
          } else if (value instanceof Character) {
              out.append('\'');
              appendEscapedOrPlainCharacter('\'', (Character) value);
              out.append('\'');
          } else if (value instanceof Byte) {
              out.append(value).append('b');
          } else if (value instanceof Short) {
              out.append(value).append('s');
          } else if (value instanceof Long) {
              out.append(value).append('L');
          } else if (value instanceof Float) {
              out.append(value).append('F');
          } else if (value instanceof Number || value instanceof Boolean) {
              out.append(value);
          } else if (value.getClass().isArray()) {
              appendArray(value);
          } else if (value instanceof ArgumentMatcher) {
              ((ArgumentMatcher<?>) value).writeMismatchPhrase(this);
          } else {
              appendArbitraryArgument(value);
          }
      }
  
      private void appendArray(@NonNull Object array) {
          out.append('[');
          String separator = "";
  
          for (int i = 0, n = Array.getLength(array); i < n; i++) {
              Object nextValue = Array.get(array, i);
             out.append(separator);
             appendFormatted(nextValue);
             separator = ", ";
         }
 
         out.append(']');
     }
 
     private void appendCharacters(@NonNull CharSequence characters) {
         out.append('"');
 
         for (int i = 0, n = characters.length(); i < n; i++) {
             char c = characters.charAt(i);
             appendEscapedOrPlainCharacter('"', c);
         }
 
         out.append('"');
     }
 
     private void appendEscapedOrPlainCharacter(char quoteCharacter, char c) {
         if (c == quoteCharacter) {
             out.append('\\').append(c);
         } else {
             switch (c) {
                 case '\t':
                     out.append("\\t");
                     break;
                 case '\n':
                     out.append("\\n");
                     break;
                 case '\r':
                     out.append("\\r");
                     break;
                 default:
                     out.append(c);
             }
         }
     }
 
     private void appendArbitraryArgument(@NonNull Object value) {
         Class<?> valueClass = value.getClass();
 
         Method toStringMethod;
         try {
             toStringMethod = valueClass.getMethod("toString");
         } catch (NoSuchMethodException ignored) {
             return;
         }
 
         if (toStringMethod.getDeclaringClass() == Object.class) {
             out.append(value);
         } else {
             String valueAsString = value.toString();
 
             if (valueAsString != null && !valueAsString.isEmpty()) {
                 appendCharacters(valueAsString);
             } else {
                 out.append(ObjectMethods.objectIdentity(value));
             }
         }
     }
 
     public void appendFormatted(@NonNull Object[] values) {
         String separator = "";
 
         for (Object value : values) {
             append(separator).appendFormatted(value);
             separator = ", ";
         }
     }
 }