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package org.apache.juneau.https;

import java.util.*;

import org.apache.juneau.http.*;
import org.apache.juneau.json.*;
import org.apache.juneau.testutils.*;
import org.junit.*;
import org.junit.runner.*;
import org.junit.runners.*;

/**
 * Verifies that the Accept class handles matching correctly.
 */
@RunWith(Parameterized.class)
public class AcceptTest {
	@Parameterized.Parameters
	public static Collection<Object[]> getParameters() {
		return Arrays.asList(new Object[][] {

			// label, accept-header, media-types, expected-index

			// Simple matches
			{ "SimpleMatch-1", "text/json", "['text/json']", 0, 0 },
			{ "SimpleMatch-2", "text/json", "['text/json','text/foo']", 0, 0 },
			{ "SimpleMatch-3", "text/json", "['text/foo','text/json']", 1, 1 },

			// Simple no-matches
			{ "SimpleNoMatch-1", "text/jsonx", "['text/json']", -1, -1 },
			{ "SimpleNoMatch-2", "text/jso", "['text/json']", -1, -1 },
			{ "SimpleNoMatch-3", "text/json", "['application/json']", -1, -1 },
			{ "SimpleNoMatch-4", "text/json", "[]", -1, -1 },

			// Meta-character matches
			{ "MetaMatch-1", "text/*", "['text/a','text/b+c','text/b+d+e']", 0, 2 },
			{ "MetaMatch-2", "text/b+*", "['text/a','text/b+c','text/b+d+e']", 1, 2 },
			{ "MetaMatch-3", "text/c+*", "['text/a','text/b+c','text/b+d+e']", 1, 1 },
			{ "MetaMatch-4", "text/b+d+e", "['text/a','text/b+c','text/b+d']", -1, -1 },
			{ "MetaMatch-5", "text/b+*", "['text/a','text/b+c','text/b+d+e']", 1, 2 },
			{ "MetaMatch-6", "text/d+e+*", "['text/a','text/b+c','text/b+d+e']", 2, 2 },

			{ "MetaMatch-7", "*/a", "['text/a','application/b']", 0, 0 },
			{ "MetaMatch-8", "*/*", "['text/a','text/b+c']", 0, 1 },
			{ "MetaMatch-9", "*/*", "['text/b+c','text/a']", 0, 1 },

			// Reverse meta-character matches
			{ "RevMetaMatch-1", "text/a", "['text/*']", 0, 0 },
			{ "RevMetaMatch-2", "text/a", "['*/a']", 0, 0 },
			{ "RevMetaMatch-3", "text/a", "['*/*']", 0, 0 },

			// Meta-character mixture matches
			{ "MixedMetaMatch-1", "text/*", "['text/*','text/a','text/a+b','text/b+c','text/d+*']", 0, 0 },
			{ "MixedMetaMatch-2", "*/a", "['text/*','text/a','text/a+b','text/b+c','text/d+*']", 1, 1 },
			{ "MixedMetaMatch-3", "*/*", "['text/*','text/a','text/a+b','text/b+c','text/d+*']", 0, 0 },
			{ "MixedMetaMatch-4", "text/a+*", "['text/*','text/a','text/a+b','text/b+c','text/d+*']", 1, 2 },
			{ "MixedMetaMatch-5", "text/c+*", "['text/*','text/a','text/a+b','text/b+c','text/d+*']", 3, 3 },
			{ "MixedMetaMatch-6", "text/d+*", "['text/*','text/a','text/a+b','text/b+c','text/d+*']", 4, 4 },

			// Fuzzy matches
			{ "Fuzzy-1", "text/1+2", "['text/1+2']", 0, 0 },
			// Order of subtype parts shouldn't matter.
			{ "Fuzzy-2", "text/2+1", "['text/1+2']", 0, 0 },

			// Should match if Accept has 'extra' subtypes.
			// For example, "Accept: text/json+activity" should match against the "text/json" serializer.
			{ "Fuzzy-3", "text/json+foo", "['text/json+*']", 0, 0 },

			// Shouldn't match because the accept media type must be at least a subset of the real media type
			// For example, "Accept: text/json" should not match against the "text/json+lax" serializer.
			{ "Fuzzy-4", "text/json", "['text/json+lax']", -1, -1 },

			{ "Fuzzy-5", "text/1+2", "['text/1','text/1+3']", -1, -1 },

			// "text/1+2" should be a better match than just "text/1"
			{ "Fuzzy-6", "text/1+2", "['text/1','text/1+2','text/1+2+3']", 1, 1 },
			// Same as last, but mix up the order a bit.
			{ "Fuzzy-7", "text/1+2", "['text/1+2+3','text/1','text/1+2']", 2, 2 },
			// Same as last, but mix up the order of the subtypes as well.
			{ "Fuzzy-8", "text/1+2", "['text/3+2+1','text/1','text/2+1']", 2, 2 },
			{ "Fuzzy-9", "text/1+2+3+4", "['text/1+2','text/1+2+3']", -1, -1 },
			{ "Fuzzy-10", "text/1+2+3+4", "['text/1+2+3','text/1+2']", -1, -1 },
			{ "Fuzzy-11", "text/4+2+3+1", "['text/1+2+3','text/1+2']", -1, -1 },
			{ "Fuzzy-12", "text/4+2+3+1", "['text/1+2','text/1+2+3']", -1, -1 },

			// Q metrics
			{ "Q-1", "text/A;q=0.9,text/B;q=0.1", "['text/A','text/B']", 0, 0 },
			{ "Q-2", "text/A;q=0.9,text/B;q=0.1", "['text/B','text/A']", 1, 1 },
			{ "Q-3", "text/A+1;q=0.9,text/B;q=0.1", "['text/A','text/B']", 1, 1 },
			{ "Q-4", "text/A;q=0.9,text/B+1;q=0.1", "['text/A','text/B+1']", 0, 0 },
			{ "Q-5", "text/A;q=0.9,text/A+1;q=0.1", "['text/A+1','text/A']", 1, 1 },

			// Test q=0
			{ "Q0-1", "text/A;q=0,text/B;q=0.1", "['text/A','text/B']", 1, 1 },
			{ "Q0-2", "text/A;q=0,text/B;q=0.1", "['text/A','text/A+1']", -1, -1 },

			// Test media types with parameters
			{ "Parms-1", "text/A", "['text/A;foo=bar','text/B']", 0, 0 },
			{ "Parms-2", "text/A;foo=bar", "['text/A','text/B']", 0, 0 },

			// Real-world JSON
			{ "Json-1a", "text/json", "['text/json','text/json+*','text/*','text/json+lax','text/json+lax+*','text/foo']", 0, 0 },
			{ "Json-1b", "text/json", "['text/json+*','text/*','text/json+lax','text/json+lax+*','text/foo','text/json']", 5, 5 },
			{ "Json-1c", "text/json", "['text/json+*','text/*','text/json+lax','text/json+lax+*','text/foo']", 0, 0 },
			{ "Json-1d", "text/json", "['text/*','text/json+lax','text/json+lax+*','text/foo']", 0, 0 },
			{ "Json-1e", "text/json", "['text/json+lax','text/json+lax+*','text/foo']", -1, -1 },

			{ "Json-2a", "text/json+lax", "['text/json+lax','text/json+lax+*','text/json+*','text/lax+*','text/*','text/json','text/lax']", 0, 0 },
			{ "Json-2b", "text/json+lax", "['text/json+lax+*','text/json+*','text/lax+*','text/*','text/json','text/lax']", 0, 0 },
			{ "Json-2c", "text/json+lax", "['text/json+*','text/lax+foo+*','text/*','text/json','text/lax']", 0, 0 },
			{ "Json-2d", "text/json+lax", "['text/lax+*','text/*','text/json','text/lax']", 0, 0 },
			{ "Json-2e", "text/json+lax", "['text/*','text/json','text/lax']", 0, 0 },
			{ "Json-2f", "text/json+lax", "['text/json','text/lax']", -1, -1 },

			{ "Json-3a", "text/json+activity", "['text/json+activity','text/activity+json','text/json+activity+*','text/json+*','text/*','text/json','text/json+lax','text/json+lax+*','text/foo']", 0, 0 },
			{ "Json-3b", "text/json+activity", "['text/activity+json','text/json+activity+*','text/json+*','text/*','text/json','text/json+lax','text/json+lax+*','text/foo']", 0, 0 },
			{ "Json-3c", "text/json+activity", "['text/json+activity+*','text/json+*','text/*','text/json','text/json+lax','text/json+lax+*','text/foo']", 0, 0 },
			{ "Json-3d", "text/json+activity", "['text/json+*','text/*','text/json','text/json+lax','text/json+lax+*','text/foo']", 0, 0 },
			{ "Json-3e", "text/json+activity", "['text/*','text/json','text/json+lax','text/json+lax+*','text/foo']", 0, 0 },
			{ "Json-3f", "text/json+activity", "['text/json','text/json+lax','text/json+lax+*','text/foo']", -1, -1 },

			// Real-world XML
			{ "Xml-1a", "text/xml", "['text/xml','text/xml+*','text/xml+rdf','text/foo']", 0, 0 },
			{ "Xml-1b", "text/xml", "['text/xml+*','text/xml+rdf','text/foo']", 0, 0 },
			{ "Xml-1c", "text/xml", "['text/xml+rdf','text/foo']", -1, -1 },
			{ "Xml-1d", "text/xml", "['text/foo']", -1, -1 },

			{ "Xml-2a", "text/xml+id", "['text/xml+*','text/xml','text/xml+rdf']", 0, 0 },
			{ "Xml-2b", "text/xml+id", "['text/xml','text/xml+rdf']", -1, -1 },
			{ "Xml-2c", "text/xml+id", "['text/xml+rdf']", -1, -1 },

			// Real-world RDF
			{ "Rdf-1a", "text/xml+rdf", "['text/xml+rdf','text/xml+*','text/xml']", 0, 0 },
			{ "Rdf-1b", "text/xml+rdf", "['text/xml+*','text/xml']", 0, 0 },
			{ "Rdf-1c", "text/xml+rdf", "['text/xml']", -1, -1 },
		});
	}

	private String label, accept, mediaTypes;
	private int expected, expectedReverse;

	public AcceptTest(String label, String accept, String mediaTypes, int expected, int expectedReverse) {
		this.label = label;
		this.accept = accept;
		this.mediaTypes = mediaTypes;
		this.expected = expected;
		this.expectedReverse = expectedReverse;
	}

	@Test
	public void test() throws Exception {
		Accept accept = Accept.forString(this.accept);
		MediaType[] mt = JsonParser.DEFAULT.parse(mediaTypes, MediaType[].class);
		int r = accept.findMatch(mt);
		TestUtils.assertEquals(expected, r, "{0} failed", label);
	}

	@Test
	public void testReversed() throws Exception {
		Accept accept = Accept.forString(this.accept);
		MediaType[] mt = JsonParser.DEFAULT.parse(mediaTypes, MediaType[].class);
		Collections.reverse(Arrays.asList(mt));
		int r = accept.findMatch(mt);
		int expected2 = expectedReverse == -1 ? -1 : mt.length-expectedReverse-1;
		TestUtils.assertEquals(expected2, r, "{0} failed", label);
	}
}