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// Google Mock - a framework for writing C++ mock classes.
//
// This file defines some utilities useful for implementing Google
// Mock.  They are subject to change without notice, so please DO NOT
// USE THEM IN USER CODE.

#include "gmock/internal/gmock-internal-utils.h"

#include <ctype.h>
#include <ostream>  // NOLINT
#include <string>
#include "gmock/gmock.h"
#include "gmock/internal/gmock-port.h"
#include "gtest/gtest.h"

namespace testing {
    namespace internal {

// Joins a vector of strings as if they are fields of a tuple; returns
// the joined string.
        GTEST_API_ std::string JoinAsTuple(const Strings &fields) {
            switch (fields.size()) {
                case 0:
                    return "";
                case 1:
                    return fields[0];
                default:
                    std::string result = "(" + fields[0];
                    for (size_t i = 1; i < fields.size(); i++) {
                        result += ", ";
                        result += fields[i];
                    }
                    result += ")";
                    return result;
            }
        }

// Converts an identifier name to a space-separated list of lower-case
// words.  Each maximum substring of the form [A-Za-z][a-z]*|\d+ is
// treated as one word.  For example, both "FooBar123" and
// "foo_bar_123" are converted to "foo bar 123".
        GTEST_API_ std::string ConvertIdentifierNameToWords(const char *id_name) {
            std::string result;
            char prev_char = '\0';
            for (const char *p = id_name; *p != '\0'; prev_char = *(p++)) {
                // We don't care about the current locale as the input is
                // guaranteed to be a valid C++ identifier name.
                const bool starts_new_word = IsUpper(*p) ||
                                             (!IsAlpha(prev_char) && IsLower(*p)) ||
                                             (!IsDigit(prev_char) && IsDigit(*p));

                if (IsAlNum(*p)) {
                    if (starts_new_word && result != "")
                        result += ' ';
                    result += ToLower(*p);
                }
            }
            return result;
        }

// This class reports Google Mock failures as Google Test failures.  A
// user can define another class in a similar fashion if they intend to
// use Google Mock with a testing framework other than Google Test.
        class GoogleTestFailureReporter : public FailureReporterInterface {
        public:
            void ReportFailure(FailureType type, const char *file, int line,
                               const std::string &message) override {
                AssertHelper(type == kFatal ?
                             TestPartResult::kFatalFailure :
                             TestPartResult::kNonFatalFailure,
                             file,
                             line,
                             message.c_str()) = Message();
                if (type == kFatal) {
                    posix::Abort();
                }
            }
        };

// Returns the global failure reporter.  Will create a
// GoogleTestFailureReporter and return it the first time called.
        GTEST_API_ FailureReporterInterface *GetFailureReporter() {
            // Points to the global failure reporter used by Google Mock.  gcc
            // guarantees that the following use of failure_reporter is
            // thread-safe.  We may need to add additional synchronization to
            // protect failure_reporter if we port Google Mock to other
            // compilers.
            static FailureReporterInterface *const failure_reporter =
                    new GoogleTestFailureReporter();
            return failure_reporter;
        }

// Protects global resources (stdout in particular) used by Log().
        static GTEST_DEFINE_STATIC_MUTEX_(g_log_mutex);

// Returns true if and only if a log with the given severity is visible
// according to the --gmock_verbose flag.
        GTEST_API_ bool LogIsVisible(LogSeverity severity) {
            if (GMOCK_FLAG(verbose) == kInfoVerbosity) {
                // Always show the log if --gmock_verbose=info.
                return true;
            } else if (GMOCK_FLAG(verbose) == kErrorVerbosity) {
                // Always hide it if --gmock_verbose=error.
                return false;
            } else {
                // If --gmock_verbose is neither "info" nor "error", we treat it
                // as "warning" (its default value).
                return severity == kWarning;
            }
        }

// Prints the given message to stdout if and only if 'severity' >= the level
// specified by the --gmock_verbose flag.  If stack_frames_to_skip >=
// 0, also prints the stack trace excluding the top
// stack_frames_to_skip frames.  In opt mode, any positive
// stack_frames_to_skip is treated as 0, since we don't know which
// function calls will be inlined by the compiler and need to be
// conservative.
        GTEST_API_ void Log(LogSeverity severity, const std::string &message,
                            int stack_frames_to_skip) {
            if (!LogIsVisible(severity))
                return;

            // Ensures that logs from different threads don't interleave.
            MutexLock l(&g_log_mutex);

            if (severity == kWarning) {
                // Prints a GMOCK WARNING marker to make the warnings easily searchable.
                std::cout << "\nGMOCK WARNING:";
            }
            // Pre-pends a new-line to message if it doesn't start with one.
            if (message.empty() || message[0] != '\n') {
                std::cout << "\n";
            }
            std::cout << message;
            if (stack_frames_to_skip >= 0) {
#ifdef NDEBUG
                // In opt mode, we have to be conservative and skip no stack frame.
                const int actual_to_skip = 0;
#else
                // In dbg mode, we can do what the caller tell us to do (plus one
                // for skipping this function's stack frame).
                const int actual_to_skip = stack_frames_to_skip + 1;
#endif  // NDEBUG

                // Appends a new-line to message if it doesn't end with one.
                if (!message.empty() && *message.rbegin() != '\n') {
                    std::cout << "\n";
                }
                std::cout << "Stack trace:\n"
                          << ::testing::internal::GetCurrentOsStackTraceExceptTop(
                                  ::testing::UnitTest::GetInstance(), actual_to_skip);
            }
            std::cout << ::std::flush;
        }

        GTEST_API_ WithoutMatchers GetWithoutMatchers() { return WithoutMatchers(); }

        GTEST_API_ void IllegalDoDefault(const char *file, int line) {
            internal::Assert(
                    false, file, line,
                    "You are using DoDefault() inside a composite action like "
                    "DoAll() or WithArgs().  This is not supported for technical "
                    "reasons.  Please instead spell out the default action, or "
                    "assign the default action to an Action variable and use "
                    "the variable in various places.");
        }

    }  // namespace internal
}  // namespace testing
