/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#ifndef cmConditionEvaluator_h
#define cmConditionEvaluator_h

#include "cmConfigure.h"  // IWYU pragma: keep

#include <list>
#include <string>
#include <vector>

#include "cmExpandedCommandArgument.h"
#include "cmListFileCache.h"
#include "cmPolicies.h"
#include "cmake.h"

class cmMakefile;

class cmConditionEvaluator
{
public:
    typedef std::list<cmExpandedCommandArgument> cmArgumentList;

    cmConditionEvaluator(cmMakefile& makefile, cmListFileContext const& context,
                         cmListFileBacktrace const& bt);

    // this is a shared function for both If and Else to determine if the
    // arguments were valid, and if so, was the response true. If there is
    // an error, the errorString will be set.
    bool IsTrue(const std::vector<cmExpandedCommandArgument>& args,
                std::string& errorString, cmake::MessageType& status);

private:
    // Filter the given variable definition based on policy CMP0054.
    const char* GetDefinitionIfUnquoted(
        const cmExpandedCommandArgument& argument) const;

    const char* GetVariableOrString(
        const cmExpandedCommandArgument& argument) const;

    bool IsKeyword(std::string const&         keyword,
                   cmExpandedCommandArgument& argument) const;

    bool GetBooleanValue(cmExpandedCommandArgument& arg) const;

    bool GetBooleanValueOld(cmExpandedCommandArgument const& arg,
                            bool                             one) const;

    bool GetBooleanValueWithAutoDereference(cmExpandedCommandArgument& newArg,
                                            std::string&        errorString,
                                            cmake::MessageType& status,
                                            bool oneArg = false) const;

    void IncrementArguments(cmArgumentList&           newArgs,
                            cmArgumentList::iterator& argP1,
                            cmArgumentList::iterator& argP2) const;

    void HandlePredicate(bool value, int& reducible,
                         cmArgumentList::iterator& arg, cmArgumentList& newArgs,
                         cmArgumentList::iterator& argP1,
                         cmArgumentList::iterator& argP2) const;

    void HandleBinaryOp(bool value, int& reducible,
                        cmArgumentList::iterator& arg, cmArgumentList& newArgs,
                        cmArgumentList::iterator& argP1,
                        cmArgumentList::iterator& argP2);

    bool HandleLevel0(cmArgumentList& newArgs, std::string& errorString,
                      cmake::MessageType& status);

    bool HandleLevel1(cmArgumentList& newArgs, std::string&,
                      cmake::MessageType&);

    bool HandleLevel2(cmArgumentList& newArgs, std::string& errorString,
                      cmake::MessageType& status);

    bool HandleLevel3(cmArgumentList& newArgs, std::string& errorString,
                      cmake::MessageType& status);

    bool HandleLevel4(cmArgumentList& newArgs, std::string& errorString,
                      cmake::MessageType& status);

    cmMakefile&              Makefile;
    cmListFileContext        ExecutionContext;
    cmListFileBacktrace      Backtrace;
    cmPolicies::PolicyStatus Policy12Status;
    cmPolicies::PolicyStatus Policy54Status;
    cmPolicies::PolicyStatus Policy57Status;
    cmPolicies::PolicyStatus Policy64Status;
};

#endif
