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/*
    This file is part of cpp-ethereum.

    cpp-ethereum 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.

    cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @author Lefteris Karapetsas <lefteris@ethdev.com>
 * @date 2015
 * Unit tests for Assembly Items from evmasm/Assembly.h
 */

#include <string>
#include <iostream>
#include <boost/test/unit_test.hpp>
#include <libdevcore/Log.h>
#include <libevmasm/SourceLocation.h>
#include <libevmasm/Assembly.h>
#include <libsolidity/Scanner.h>
#include <libsolidity/Parser.h>
#include <libsolidity/NameAndTypeResolver.h>
#include <libsolidity/Compiler.h>
#include <libsolidity/AST.h>

using namespace std;
using namespace dev::eth;

namespace dev
{
namespace solidity
{
namespace test
{

namespace
{

eth::AssemblyItems compileContract(const string& _sourceCode)
{
    Parser parser;
    ASTPointer<SourceUnit> sourceUnit;
    BOOST_REQUIRE_NO_THROW(sourceUnit = parser.parse(make_shared<Scanner>(CharStream(_sourceCode))));
    NameAndTypeResolver resolver({});
    resolver.registerDeclarations(*sourceUnit);
    for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
        if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
        {
            BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
        }
    for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
        if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
        {
            BOOST_REQUIRE_NO_THROW(resolver.checkTypeRequirements(*contract));
        }
    for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
        if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
        {
            Compiler compiler;
            compiler.compileContract(*contract, map<ContractDefinition const*, bytes const*>{});

            return compiler.getRuntimeAssemblyItems();
        }
    BOOST_FAIL("No contract found in source.");
    return AssemblyItems();
}

void checkAssemblyLocations(AssemblyItems const& _items, vector<SourceLocation> const& _locations)
{
    BOOST_CHECK_EQUAL(_items.size(), _locations.size());
    for (size_t i = 0; i < min(_items.size(), _locations.size()); ++i)
    {
        BOOST_CHECK_MESSAGE(
            _items[i].getLocation() == _locations[i],
            "Location mismatch for assembly item " + to_string(i) + ". Found: " +
                    to_string(_items[i].getLocation().start) + "-" +
                    to_string(_items[i].getLocation().end) + ", expected: " +
                    to_string(_locations[i].start) + "-" +
                    to_string(_locations[i].end));
    }
}

} // end anonymous namespace

BOOST_AUTO_TEST_SUITE(Assembly)

BOOST_AUTO_TEST_CASE(location_test)
{
    char const* sourceCode = R"(
    contract test {
        function f() returns (uint256 a) {
            return 16;
        }
    }
    )";
    shared_ptr<string const> n = make_shared<string>("source");
    AssemblyItems items = compileContract(sourceCode);
    vector<SourceLocation> locations =
        vector<SourceLocation>(17, SourceLocation(2, 75, n)) +
        vector<SourceLocation>(26, SourceLocation(20, 72, n)) +
        vector<SourceLocation>{SourceLocation(42, 51, n), SourceLocation(65, 67, n)} +
        vector<SourceLocation>(4, SourceLocation(58, 67, n)) +
        vector<SourceLocation>(3, SourceLocation(20, 72, n));
    checkAssemblyLocations(items, locations);
}

BOOST_AUTO_TEST_SUITE_END()

}
}
} // end namespaces