/*
    Ousía
    Copyright (C) 2014, 2015  Benjamin Paaßen, Andreas Stöckel

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <gtest/gtest.h>

#include <core/common/CharReader.hpp>

#include <core/Tokenizer.hpp>

namespace ousia {
TEST(TokenTreeNode, testConstructor)
{
	TokenTreeNode root{{{"a", 1}, {"aab", 2}, {"aac", 3}, {"abd", 4}}};

	ASSERT_EQ(-1, root.tokenId);
	ASSERT_EQ(1, root.children.size());
	ASSERT_TRUE(root.children.find('a') != root.children.end());

	const TokenTreeNode &a = root.children.at('a');
	ASSERT_EQ(1, a.tokenId);
	ASSERT_EQ(2, a.children.size());
	ASSERT_TRUE(a.children.find('a') != a.children.end());
	ASSERT_TRUE(a.children.find('b') != a.children.end());

	const TokenTreeNode &aa = a.children.at('a');
	ASSERT_EQ(-1, aa.tokenId);
	ASSERT_EQ(2, aa.children.size());
	ASSERT_TRUE(aa.children.find('b') != aa.children.end());
	ASSERT_TRUE(aa.children.find('c') != aa.children.end());

	const TokenTreeNode &aab = aa.children.at('b');
	ASSERT_EQ(2, aab.tokenId);
	ASSERT_EQ(0, aab.children.size());

	const TokenTreeNode &aac = aa.children.at('c');
	ASSERT_EQ(3, aac.tokenId);
	ASSERT_EQ(0, aac.children.size());

	const TokenTreeNode &ab = a.children.at('b');
	ASSERT_EQ(-1, ab.tokenId);
	ASSERT_EQ(1, ab.children.size());
	ASSERT_TRUE(ab.children.find('d') != ab.children.end());

	const TokenTreeNode &abd = ab.children.at('d');
	ASSERT_EQ(4, abd.tokenId);
	ASSERT_EQ(0, abd.children.size());
}

TEST(Tokenizer, testTokenization)
{
	TokenTreeNode root{{{"/", 1}, {"/*", 2}, {"*/", 3}}};

	CharReader reader{"Test/Test /* Block Comment */", 0};
	//                 012345678901234567890123456789
	//                 0        1         2

	std::vector<Token> expected = {
	    {TOKEN_TEXT, "Test", SourceLocation{0, 0, 4}},
	    {1, "/", SourceLocation{0, 4, 5}},
	    {TOKEN_TEXT, "Test ", SourceLocation{0, 5, 10}},
	    {2, "/*", SourceLocation{0, 10, 12}},
	    {TOKEN_TEXT, " Block Comment ", SourceLocation{0, 12, 27}},
	    {3, "*/", SourceLocation{0, 27, 29}}};

	Tokenizer tokenizer{reader, root};

	Token t;
	for (auto &te : expected) {
		EXPECT_TRUE(tokenizer.next(t));
		EXPECT_EQ(te.tokenId, t.tokenId);
		EXPECT_EQ(te.content, t.content);
		EXPECT_EQ(te.location.getSourceId(), t.location.getSourceId());
		EXPECT_EQ(te.location.getStart(), t.location.getStart());
		EXPECT_EQ(te.location.getEnd(), t.location.getEnd());
	}
	ASSERT_FALSE(tokenizer.next(t));
}

TEST(Tokenizer, testIncompleteTokens)
{
	TokenTreeNode root{{{"ab", 1}, {"c", 2}}};

	CharReader reader{"ac", 0};

	std::vector<Token> expected = {
	    {TOKEN_TEXT, "a", SourceLocation{0, 0, 1}},
	    {2, "c", SourceLocation{0, 1, 2}}};

	Tokenizer tokenizer{reader, root};

	Token t;
	for (auto &te : expected) {
		EXPECT_TRUE(tokenizer.next(t));
		EXPECT_EQ(te.tokenId, t.tokenId);
		EXPECT_EQ(te.content, t.content);
		EXPECT_EQ(te.location.getSourceId(), t.location.getSourceId());
		EXPECT_EQ(te.location.getStart(), t.location.getStart());
		EXPECT_EQ(te.location.getEnd(), t.location.getEnd());
	}
	ASSERT_FALSE(tokenizer.next(t));
}
}