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#include "allocation_index.hpp"

#include <mbgl/render_test.hpp>
#include <mbgl/util/io.hpp>
#include <mbgl/util/logging.hpp>
#include <mbgl/util/run_loop.hpp>

#include <args.hxx>

#include "manifest_parser.hpp"
#include "metadata.hpp"
#include "parser.hpp"
#include "runner.hpp"

#define ANSI_COLOR_RED        "\x1b[31m"
#define ANSI_COLOR_GREEN      "\x1b[32m"
#define ANSI_COLOR_YELLOW     "\x1b[33m"
#define ANSI_COLOR_BLUE       "\x1b[34m"
#define ANSI_COLOR_MAGENTA    "\x1b[35m"
#define ANSI_COLOR_CYAN       "\x1b[36m"
#define ANSI_COLOR_GRAY       "\x1b[37m"
#define ANSI_COLOR_LIGHT_GRAY "\x1b[90m"
#define ANSI_COLOR_RESET      "\x1b[0m"

#if !defined(SANITIZE)
void* operator new(std::size_t sz) {
    void* ptr = AllocationIndex::allocate(sz);
    if (!ptr) throw std::bad_alloc{};

    return ptr;
}

void operator delete(void* ptr) noexcept {
    AllocationIndex::deallocate(ptr);
}

void operator delete(void* ptr, size_t) noexcept {
    AllocationIndex::deallocate(ptr);
}
#endif

namespace {

using ArgumentsTuple =
    std::tuple<bool, bool, uint32_t, std::string, TestRunner::UpdateResults, std::vector<std::string>, std::string>;
ArgumentsTuple parseArguments(int argc, char** argv) {
    const static std::unordered_map<std::string, TestRunner::UpdateResults> updateResultsFlags = {
        {"default", TestRunner::UpdateResults::DEFAULT},
        {"platform", TestRunner::UpdateResults::PLATFORM},
        {"metrics", TestRunner::UpdateResults::METRICS},
        {"rebaseline", TestRunner::UpdateResults::REBASELINE}};

    args::ArgumentParser argumentParser("Mapbox GL Test Runner");

    args::HelpFlag helpFlag(argumentParser, "help", "Display this help menu", {'h', "help"});

    args::Flag recycleMapFlag(argumentParser, "recycle map", "Toggle reusing the map object", {'r', "recycle-map"});
    args::Flag shuffleFlag(argumentParser, "shuffle", "Toggle shuffling the tests order", {'s', "shuffle"});
    args::ValueFlag<uint32_t> seedValue(argumentParser, "seed", "Shuffle seed (default: random)", {"seed"});
    args::ValueFlag<std::string> testPathValue(
        argumentParser, "manifestPath", "Test manifest file path", {'p', "manifestPath"});
    args::ValueFlag<std::string> testFilterValue(argumentParser, "filter", "Test filter regex", {'f', "filter"});
    args::MapFlag<std::string, TestRunner::UpdateResults> testUpdateResultsValue(
        argumentParser,
        "update",
        "Test results update mode. Supported values are: \"default\", \"platform\", \"metrics\"",
        {'u', "update"},
        updateResultsFlags);

    args::PositionalList<std::string> testNameValues(argumentParser, "URL", "Test name(s)");

    try {
        argumentParser.ParseCLI(argc, argv);
    } catch (const args::Help&) {
        std::ostringstream stream;
        stream << argumentParser;
        mbgl::Log::Info(mbgl::Event::General, stream.str());
        exit(0);
    } catch (const args::ParseError& e) {
        std::ostringstream stream;
        stream << argumentParser;
        mbgl::Log::Info(mbgl::Event::General, stream.str());
        mbgl::Log::Error(mbgl::Event::General, e.what());
        exit(1);
    } catch (const args::ValidationError& e) {
        std::ostringstream stream;
        stream << argumentParser;
        mbgl::Log::Info(mbgl::Event::General, stream.str());
        mbgl::Log::Error(mbgl::Event::General, e.what());
        exit(2);
    }

    mbgl::filesystem::path manifestPath{testPathValue ? args::get(testPathValue) : std::string{TEST_RUNNER_ROOT_PATH}};
    if (!mbgl::filesystem::exists(manifestPath) || !manifestPath.has_filename()) {
        mbgl::Log::Error(mbgl::Event::General,
                         "Provided test manifest file path '%s' does not exist",
                         manifestPath.string().c_str());
        exit(3);
    }

    auto testNames = testNameValues ? args::get(testNameValues) : std::vector<std::string>{};
    auto testFilter = testFilterValue ? args::get(testFilterValue) : std::string{};
    const auto shuffle = shuffleFlag ? args::get(shuffleFlag) : false;
    const auto seed = seedValue ? args::get(seedValue) : 1u;
    TestRunner::UpdateResults updateResults =
        testUpdateResultsValue ? args::get(testUpdateResultsValue) : TestRunner::UpdateResults::NO;
    return ArgumentsTuple{recycleMapFlag ? args::get(recycleMapFlag) : false,
                          shuffle,
                          seed,
                          manifestPath.string(),
                          updateResults,
                          std::move(testNames),
                          std::move(testFilter)};
}
} // namespace
namespace mbgl {

int runRenderTests(int argc, char** argv, std::function<void()> testStatus) {
    bool recycleMap;
    bool shuffle;
    uint32_t seed;
    std::string manifestPath;
    std::vector<std::string> testNames;
    std::string testFilter;
    TestRunner::UpdateResults updateResults;

    std::tie(recycleMap, shuffle, seed, manifestPath, updateResults, testNames, testFilter) =
        parseArguments(argc, argv);
    auto manifestData = ManifestParser::parseManifest(manifestPath, testNames, testFilter);
    if (!manifestData) {
        exit(5);
    }
    mbgl::util::RunLoop runLoop;
    TestRunner runner(std::move(*manifestData), updateResults);
    if (shuffle) {
        printf(ANSI_COLOR_YELLOW "Shuffle seed: %d" ANSI_COLOR_RESET "\n", seed);
        runner.doShuffle(seed);
    }

    const auto& manifest = runner.getManifest();
    const auto& ignores = manifest.getIgnores();
    const auto& testPaths = manifest.getTestPaths();
    std::vector<TestMetadata> metadatas;
    metadatas.reserve(testPaths.size());

    TestStatistics stats;

    for (auto& testPath : testPaths) {
        TestMetadata metadata = parseTestMetadata(testPath, manifest);

        if (!recycleMap) {
            runner.reset();
        }

        std::string& id = metadata.id;
        std::string& status = metadata.status;
        std::string& color = metadata.color;

        const std::string::size_type rootLength = manifest.getTestRootPath().length();
        id = testPath.defaultExpectations();
        id = id.substr(rootLength + 1, id.length() - rootLength - 2);

        bool shouldIgnore = false;
        std::string ignoreReason;

        const std::string ignoreName = id;
        const auto it = std::find_if(ignores.cbegin(), ignores.cend(), [&ignoreName](auto pair) { return pair.first == ignoreName; });
        if (it != ignores.end()) {
            shouldIgnore = true;
            ignoreReason = it->second;
            if (ignoreReason.rfind("skip", 0) == 0) {
                printf(ANSI_COLOR_GRAY "* skipped %s (%s)" ANSI_COLOR_RESET "\n", id.c_str(), ignoreReason.c_str());
                continue;
            }
        }

        bool errored = !metadata.errorMessage.empty();
        if (!errored) {
            errored = !runner.run(metadata) || !metadata.errorMessage.empty();
        }

        bool passed =
            !errored && (!metadata.outputsImage || !metadata.diff.empty()) && metadata.difference <= metadata.allowed;

        if (shouldIgnore) {
            if (passed) {
                status = "ignored passed";
                color = "#E8A408";
                stats.ignorePassedTests++;
                printf(ANSI_COLOR_YELLOW "* ignore %s (%s)" ANSI_COLOR_RESET "\n", id.c_str(), ignoreReason.c_str());
            } else {
                status = "ignored failed";
                color = "#9E9E9E";
                stats.ignoreFailedTests++;
                printf(ANSI_COLOR_LIGHT_GRAY "* ignore %s (%s)" ANSI_COLOR_RESET "\n", id.c_str(), ignoreReason.c_str());
            }
        } else {
            if (passed) {
                status = "passed";
                color = "green";
                stats.passedTests++;
                printf(ANSI_COLOR_GREEN "* passed %s" ANSI_COLOR_RESET "\n", id.c_str());
            } else if (errored) {
                status = "errored";
                color = "red";
                stats.erroredTests++;
                printf(ANSI_COLOR_RED "* errored %s" ANSI_COLOR_RESET "\n", id.c_str());
                printf(ANSI_COLOR_RED "* error: %s" ANSI_COLOR_RESET "\n", metadata.errorMessage.c_str());
            } else {
                status = "failed";
                color = "red";
                stats.failedTests++;
                printf(ANSI_COLOR_RED "* failed %s" ANSI_COLOR_RESET "\n", id.c_str());
            }
        }

        metadatas.push_back(std::move(metadata));
        if (testStatus) {
            testStatus();
        }
    }

    const auto manifestName = std::string("_").append(mbgl::filesystem::path(manifestPath).stem());
    const auto resultPath = manifest.getResultPath() + "/" + (testNames.empty() ? "render-tests" : testNames.front()) +
                            manifestName + "_index.html";
    std::string resultsHTML = createResultPage(stats, metadatas, shuffle, seed);
    mbgl::util::write_file(resultPath, resultsHTML);

    const uint32_t count =
        stats.erroredTests + stats.failedTests + stats.ignoreFailedTests + stats.ignorePassedTests + stats.passedTests;

    if (stats.passedTests) {
        printf(ANSI_COLOR_GREEN "%u passed (%.1lf%%)" ANSI_COLOR_RESET "\n", stats.passedTests, 100.0 * stats.passedTests / count);
    }
    if (stats.ignorePassedTests) {
        printf(ANSI_COLOR_YELLOW "%u passed but were ignored (%.1lf%%)" ANSI_COLOR_RESET "\n", stats.ignorePassedTests, 100.0 * stats.ignorePassedTests / count);
    }
    if (stats.ignoreFailedTests) {
        printf(ANSI_COLOR_LIGHT_GRAY "%u ignored (%.1lf%%)" ANSI_COLOR_RESET "\n", stats.ignoreFailedTests, 100.0 * stats.ignoreFailedTests / count);
    }
    if (stats.failedTests) {
        printf(ANSI_COLOR_RED "%u failed (%.1lf%%)" ANSI_COLOR_RESET "\n", stats.failedTests, 100.0 * stats.failedTests / count);
    }
    if (stats.erroredTests) {
        printf(ANSI_COLOR_RED "%u errored (%.1lf%%)" ANSI_COLOR_RESET "\n", stats.erroredTests, 100.0 * stats.erroredTests / count);
    }

    printf("Results at: %s\n", mbgl::filesystem::canonical(resultPath).c_str());

    return stats.failedTests + stats.erroredTests == 0 ? 0 : 1;
}

} // namespace mbgl