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/*
    This file is part of solidity.

    solidity 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.

    solidity 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 solidity.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * Framework for testing features from the analysis phase of compiler.
 */

#include <test/libsolidity/AnalysisFramework.h>

#include <libsolidity/interface/CompilerStack.h>
#include <libsolidity/interface/SourceReferenceFormatter.h>

#include <libsolidity/ast/AST.h>

#include <libdevcore/SHA3.h>

#include <boost/test/unit_test.hpp>

using namespace std;
using namespace dev;
using namespace dev::solidity;
using namespace dev::solidity::test;

pair<SourceUnit const*, shared_ptr<Error const>>
AnalysisFramework::parseAnalyseAndReturnError(
    string const& _source,
    bool _reportWarnings,
    bool _insertVersionPragma,
    bool _allowMultipleErrors
)
{
    m_compiler.reset();
    m_compiler.addSource("", _insertVersionPragma ? "pragma solidity >=0.0;\n" + _source : _source);
    if (!m_compiler.parse())
    {
        printErrors();
        BOOST_ERROR("Parsing contract failed in analysis test suite.");
    }

    m_compiler.analyze();

    std::shared_ptr<Error const> firstError;
    for (auto const& currentError: m_compiler.errors())
    {
        solAssert(currentError->comment(), "");
        if (currentError->comment()->find("This is a pre-release compiler version") == 0)
            continue;

        if (_reportWarnings || (currentError->type() != Error::Type::Warning))
        {
            if (firstError && !_allowMultipleErrors)
            {
                printErrors();
                BOOST_FAIL("Multiple errors found.");
            }
            if (!firstError)
                firstError = currentError;
        }
    }

    return make_pair(&m_compiler.ast(), firstError);
}

SourceUnit const* AnalysisFramework::parseAndAnalyse(string const& _source)
{
    auto sourceAndError = parseAnalyseAndReturnError(_source);
    BOOST_REQUIRE(!!sourceAndError.first);
    BOOST_REQUIRE(!sourceAndError.second);
    return sourceAndError.first;
}

bool AnalysisFramework::success(string const& _source)
{
    return !parseAnalyseAndReturnError(_source).second;
}

Error AnalysisFramework::expectError(std::string const& _source, bool _warning, bool _allowMultiple)
{
    auto sourceAndError = parseAnalyseAndReturnError(_source, _warning, true, _allowMultiple);
    BOOST_REQUIRE(!!sourceAndError.second);
    BOOST_REQUIRE(!!sourceAndError.first);
    return *sourceAndError.second;
}

void AnalysisFramework::printErrors()
{
    for (auto const& error: m_compiler.errors())
        SourceReferenceFormatter::printExceptionInformation(
            std::cerr,
            *error,
            (error->type() == Error::Type::Warning) ? "Warning" : "Error",
            [&](std::string const& _sourceName) -> solidity::Scanner const& { return m_compiler.scanner(_sourceName); }
        );
}

ContractDefinition const* AnalysisFramework::retrieveContract(SourceUnit const& _source, unsigned index)
{
    ContractDefinition* contract = nullptr;
    unsigned counter = 0;
    for (shared_ptr<ASTNode> const& node: _source.nodes())
        if ((contract = dynamic_cast<ContractDefinition*>(node.get())) && counter == index)
            return contract;

    return nullptr;
}

FunctionTypePointer AnalysisFramework::retrieveFunctionBySignature(
    ContractDefinition const& _contract,
    std::string const& _signature
)
{
    FixedHash<4> hash(dev::keccak256(_signature));
    return _contract.interfaceFunctions()[hash];
}