//
// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// angle_test_instantiate.h: Adds support for filtering parameterized
// tests by platform, so we skip unsupported configs.

#ifndef ANGLE_TEST_INSTANTIATE_H_
#define ANGLE_TEST_INSTANTIATE_H_

#include <gtest/gtest.h>

namespace angle
{
struct SystemInfo;
struct PlatformParameters;

// Operating systems
bool IsAndroid();
bool IsLinux();
bool IsOSX();
bool IsOzone();
bool IsWindows();
bool IsFuchsia();

bool IsPlatformAvailable(const PlatformParameters &param);

// This functions is used to filter which tests should be registered,
// T must be or inherit from angle::PlatformParameters.
template <typename T>
std::vector<T> FilterTestParams(const T *params, size_t numParams)
{
    std::vector<T> filtered;

    for (size_t i = 0; i < numParams; i++)
    {
        if (IsPlatformAvailable(params[i]))
        {
            filtered.push_back(params[i]);
        }
    }

    return filtered;
}

template <typename T>
std::vector<T> FilterTestParams(const std::vector<T> &params)
{
    return FilterTestParams(params.data(), params.size());
}

// Used to generate valid test names out of testing::PrintToStringParamName used in combined tests.
struct CombinedPrintToStringParamName
{
    template <class ParamType>
    std::string operator()(const testing::TestParamInfo<ParamType> &info) const
    {
        std::string name = testing::PrintToStringParamName()(info);
        std::string sanitized;
        for (const char c : name)
        {
            if (c == ',')
            {
                sanitized += '_';
            }
            else if (isalnum(c) || c == '_')
            {
                sanitized += c;
            }
        }
        return sanitized;
    }
};

#define ANGLE_INSTANTIATE_TEST_PLATFORMS(testName) \
    testing::ValuesIn(::angle::FilterTestParams(testName##params, ArraySize(testName##params)))

// Instantiate the test once for each extra argument. The types of all the
// arguments must match, and getRenderer must be implemented for that type.
#define ANGLE_INSTANTIATE_TEST(testName, first, ...)                                 \
    const decltype(first) testName##params[] = {first, ##__VA_ARGS__};               \
    INSTANTIATE_TEST_SUITE_P(, testName, ANGLE_INSTANTIATE_TEST_PLATFORMS(testName), \
                             testing::PrintToStringParamName())

// Instantiate the test for a combination of N parameters and the enumeration of platforms in the
// extra args, similar to ANGLE_INSTANTIATE_TEST.  The macros are defined only for the Ns currently
// in use, and can be expanded as necessary.
#define ANGLE_INSTANTIATE_TEST_COMBINE_1(testName, print, combine1, first, ...) \
    const decltype(first) testName##params[] = {first, ##__VA_ARGS__};          \
    INSTANTIATE_TEST_SUITE_P(                                                   \
        , testName, testing::Combine(ANGLE_INSTANTIATE_TEST_PLATFORMS(testName), combine1), print)
#define ANGLE_INSTANTIATE_TEST_COMBINE_5(testName, print, combine1, combine2, combine3, combine4, \
                                         combine5, first, ...)                                    \
    const decltype(first) testName##params[] = {first, ##__VA_ARGS__};                            \
    INSTANTIATE_TEST_SUITE_P(, testName,                                                          \
                             testing::Combine(ANGLE_INSTANTIATE_TEST_PLATFORMS(testName),         \
                                              combine1, combine2, combine3, combine4, combine5),  \
                             print)

// Checks if a config is expected to be supported by checking a system-based white list.
bool IsConfigWhitelisted(const SystemInfo &systemInfo, const PlatformParameters &param);

// Determines if a config is supported by trying to initialize it. Does not require SystemInfo.
bool IsConfigSupported(const PlatformParameters &param);

}  // namespace angle

#endif  // ANGLE_TEST_INSTANTIATE_H_
