/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.juneau;
  
  import static org.junit.jupiter.api.Assertions.*;
  
  import java.io.*;
  
  import org.apache.juneau.parser.*;
  import org.junit.jupiter.api.*;
  
  class ParserReader_Test extends TestBase {
  
  	//====================================================================================================
  	// testBasic
  	//====================================================================================================
  	@Test void a01_basic() throws Exception {
  		var t = "01234567890123456789012345678901234567890123456789";
  
  		// Min buff size is 20.
  		var pr = createParserReader(t);
  		var r = read(pr);
  		assertEquals(t, r);
  		pr.close();
  
  		pr = createParserReader(t);
  		pr.read();
  		pr.unread();
  		r = read(pr);
  		assertEquals(t, r);
  		pr.close();
  
  		pr = createParserReader(t);
  		assertEquals('0', (char)pr.peek());
  		assertEquals('0', (char)pr.peek());
  		r = read(pr);
  		assertEquals(t, r);
  
  		var pr2 = createParserReader(t);
  		pr2.read();
  		pr2.unread();
  		assertThrows(IOException.class, pr2::unread);
  	}
  
  	//====================================================================================================
  	// testMarking
  	//====================================================================================================
  	@Test void a02_marking() throws Exception {
  		var t = "a123456789b123456789c123456789d123456789e123456789f123456789g123456789h123456789i123456789j123456789";
  		var r = (Object)null;
  
  		// Min buff size is 20.
  		var pr = createParserReader(t);
  		read(pr, 5);
  		pr.mark();
  		read(pr, 10);
  		r = pr.getMarked();
  		assertEquals("56789b1234", r);
  		r = read(pr);
  		assertEquals("56789c123456789d123456789e123456789f123456789g123456789h123456789i123456789j123456789", r);
  
  		// Force doubling of buffer size
  		pr = createParserReader(t);
  		read(pr, 5);
  		pr.mark();
  		read(pr, 20);
  		r = pr.getMarked();
  		assertEquals("56789b123456789c1234", r);
  		r = read(pr);
  		assertEquals("56789d123456789e123456789f123456789g123456789h123456789i123456789j123456789", r);
  	}
  
  	//====================================================================================================
  	// testReadStrings
  	//====================================================================================================
  	@Test void a03_readStrings() throws Exception {
  		var t = "a123456789b123456789c123456789d123456789e123456789f123456789g123456789h123456789i123456789j123456789";
  
  		// Min buff size is 20.
  		var pr = createParserReader(t);
  		assertEquals("a123456789", pr.read(10));
  		pr.mark();
  		assertEquals("b123456789c123456789", pr.read(20));
  		assertEquals("d123456789e123456789f123456789", pr.read(30));
  		assertEquals("123456789c123456789d123456789e123456789f12345678", pr.getMarked(1, -1));
 		assertEquals("g123456789h123456789i123456789j123456789", pr.read(100));
 		assertEquals("", pr.read(100));
 		pr.close();
 	}
 
 	//====================================================================================================
 	// testReplace
 	//====================================================================================================
 	@Test void a04_replace() throws Exception {
 		var t = "a123456789b123456789c123456789d123456789e123456789f123456789g123456789h123456789i123456789j123456789";
 
 		// Min buff size is 20.
 		var pr = createParserReader(t);
 		assertEquals("a123456789", pr.read(10));
 		pr.mark();
 		assertEquals("b123456789", pr.read(10));
 		pr.replace('x');
 		assertEquals("c123456789", pr.read(10));
 		assertEquals("b12345678xc123456789", pr.getMarked());
 		pr.close();
 
 		pr = createParserReader(t);
 		assertEquals("a123456789", pr.read(10));
 		pr.mark();
 		assertEquals("b123456789", pr.read(10));
 		pr.replace('x', 5);
 		assertEquals("c123456789", pr.read(10));
 		assertEquals("b1234xc123456789", pr.getMarked());
 		pr.close();
 	}
 
 	//====================================================================================================
 	// testDelete
 	//====================================================================================================
 	@Test void a05_delete() throws Exception {
 		var t = "a123456789b123456789c123456789d123456789e123456789f123456789g123456789h123456789i123456789j123456789";
 
 		// Min buff size is 20.
 		var pr = createParserReader(t);
 		assertEquals("a123456789", pr.read(10));
 		pr.mark();
 		assertEquals("b123456789", pr.read(10));
 		pr.delete();
 		assertEquals("c123456789", pr.read(10));
 		assertEquals("b12345678c123456789", pr.getMarked());
 		pr.close();
 
 		pr = createParserReader(t);
 		assertEquals("a123456789", pr.read(10));
 		pr.mark();
 		assertEquals("b123456789", pr.read(10));
 		pr.delete(5);
 		assertEquals("c123456789", pr.read(10));
 		assertEquals("b1234c123456789", pr.getMarked());
 		pr.close();
 	}
 
 	//====================================================================================================
 	// Utility methods
 	//====================================================================================================
 
 	private String read(ParserReader r) throws IOException {
 		return read(r, Integer.MAX_VALUE);
 	}
 
 	private String read(ParserReader r, int length) throws IOException {
 		var sb = new StringBuilder();
 		for (int i = 0; i < length; i++) {
 			int c = r.read();
 			if (c == -1)
 				return sb.toString();
 			sb.append((char)c);
 		}
 		return sb.toString();
 	}
 
 	private ParserReader createParserReader(Object in) throws Exception {
 		return new ParserReader(new ParserPipe(in));
 	}
 }