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#include "googletest.h"

#include "mockbuilddependencystorage.h"
#include "mockmodifiedtimechecker.h"
#include "mockbuilddependenciesgenerator.h"

#include <builddependenciesprovider.h>

namespace {

using ClangBackEnd::BuildDependency;
using ClangBackEnd::BuildDependencies;
using ClangBackEnd::FilePathId;
using ClangBackEnd::FilePathIds;
using ClangBackEnd::SourceEntry;
using ClangBackEnd::SourceEntries;
using ClangBackEnd::SourceType;
using ClangBackEnd::UsedMacro;
using ClangBackEnd::UsedMacros;

MATCHER_P(HasSourceId, sourceId,  std::string(negation ? "hasn't" : "has")
          + " sourceId " + PrintToString(sourceId))
{
    const SourceEntry & sourceEntry = arg;

    return sourceEntry.sourceId.filePathId == sourceId;
}

class BuildDependenciesProvider : public testing::Test
{
protected:
    NiceMock<MockBuildDependenciesStorage> mockBuildDependenciesStorage;
    NiceMock<MockModifiedTimeChecker> mockModifiedTimeChecker;
    NiceMock<MockBuildDependenciesGenerator> mockBuildDependenciesGenerator;
    ClangBackEnd::BuildDependenciesProvider provider{mockBuildDependenciesStorage, mockModifiedTimeChecker, mockBuildDependenciesGenerator};
    ClangBackEnd::V2::ProjectPartContainer projectPart1{"ProjectPart1",
                                                        {"--yi"},
                                                        {{"YI","1"}},
                                                        {"/yi"},
                                                        {1},
                                                        {2}};
    ClangBackEnd::V2::ProjectPartContainer projectPart2{"ProjectPart2",
                                                        {"--er"},
                                                        {{"ER","2"}},
                                                        {"/er"},
                                                        {1},
                                                        {2, 3, 4}};
    SourceEntries firstSources{{1, SourceType::Any, 1}, {2, SourceType::Any, 1}, {10, SourceType::Any, 1}};
    SourceEntries secondSources{{1, SourceType::Any, 1}, {3, SourceType::Any, 1}, {8, SourceType::Any, 1}};
    SourceEntries thirdSources{{4, SourceType::Any, 1}, {8, SourceType::Any, 1}, {10, SourceType::Any, 1}};
    UsedMacros firstUsedMacros{{"YI", 1}};
    UsedMacros secondUsedMacros{{"LIANG", 2}, {"ER", 2}};
    UsedMacros thirdUsedMacros{{"SAN", 10}};
    BuildDependency buildDependency{secondSources, {}, {}, {}};
};

TEST_F(BuildDependenciesProvider, CreateCallsFetchDependSourcesFromStorageIfTimeStampsAreUpToDate)
{
    InSequence s;

    EXPECT_CALL(mockBuildDependenciesStorage, fetchDependSources({2})).WillRepeatedly(Return(firstSources));
    EXPECT_CALL(mockModifiedTimeChecker, isUpToDate(firstSources)).WillRepeatedly(Return(true));
    EXPECT_CALL(mockBuildDependenciesGenerator, create(projectPart1)).Times(0);

    provider.create(projectPart1);
}

TEST_F(BuildDependenciesProvider, FetchDependSourcesFromStorage)
{
    ON_CALL(mockBuildDependenciesStorage, fetchDependSources({2})).WillByDefault(Return(firstSources));
    ON_CALL(mockBuildDependenciesStorage, fetchDependSources({3})).WillByDefault(Return(secondSources));
    ON_CALL(mockBuildDependenciesStorage, fetchDependSources({4})).WillByDefault(Return(thirdSources));
    ON_CALL(mockModifiedTimeChecker, isUpToDate(_)).WillByDefault(Return(true));

    auto buildDependency = provider.create(projectPart2);

    ASSERT_THAT(buildDependency.includes, ElementsAre(HasSourceId(1), HasSourceId(2), HasSourceId(3), HasSourceId(4), HasSourceId(8), HasSourceId(10)));
}

TEST_F(BuildDependenciesProvider, CreateCallsFetchDependSourcesFromGeneratorIfTimeStampsAreNotUpToDate)
{
    InSequence s;

    EXPECT_CALL(mockBuildDependenciesStorage, fetchDependSources({2})).WillRepeatedly(Return(firstSources));
    EXPECT_CALL(mockModifiedTimeChecker, isUpToDate(firstSources)).WillRepeatedly(Return(false));
    EXPECT_CALL(mockBuildDependenciesGenerator, create(projectPart1));

    provider.create(projectPart1);
}

TEST_F(BuildDependenciesProvider, FetchDependSourcesFromGenerator)
{
    ON_CALL(mockBuildDependenciesStorage, fetchDependSources({2})).WillByDefault(Return(firstSources));
    ON_CALL(mockModifiedTimeChecker, isUpToDate(_)).WillByDefault(Return(false));
    ON_CALL(mockBuildDependenciesGenerator, create(projectPart1)).WillByDefault(Return(buildDependency));

    auto buildDependency = provider.create(projectPart1);

    ASSERT_THAT(buildDependency.includes, ElementsAre(HasSourceId(1), HasSourceId(3), HasSourceId(8)));
}

TEST_F(BuildDependenciesProvider, CreateCallsFetchUsedMacrosFromStorageIfTimeStampsAreUpToDate)
{
    InSequence s;

    EXPECT_CALL(mockBuildDependenciesStorage, fetchDependSources({2})).WillRepeatedly(Return(firstSources));
    EXPECT_CALL(mockModifiedTimeChecker, isUpToDate(firstSources)).WillRepeatedly(Return(true));
    EXPECT_CALL(mockBuildDependenciesStorage, fetchUsedMacros({1}));
    EXPECT_CALL(mockBuildDependenciesStorage, fetchUsedMacros({2}));
    EXPECT_CALL(mockBuildDependenciesStorage, fetchUsedMacros({10}));

    provider.create(projectPart1);
}

TEST_F(BuildDependenciesProvider, FetchUsedMacrosFromStorageIfDependSourcesAreUpToDate)
{
    ON_CALL(mockBuildDependenciesStorage, fetchDependSources({2})).WillByDefault(Return(firstSources));
    ON_CALL(mockModifiedTimeChecker, isUpToDate(firstSources)).WillByDefault(Return(true));
    ON_CALL(mockBuildDependenciesStorage, fetchUsedMacros({1})).WillByDefault(Return(firstUsedMacros));
    ON_CALL(mockBuildDependenciesStorage, fetchUsedMacros({2})).WillByDefault(Return(secondUsedMacros));
    ON_CALL(mockBuildDependenciesStorage, fetchUsedMacros({10})).WillByDefault(Return(thirdUsedMacros));

    auto buildDependency = provider.create(projectPart1);

    ASSERT_THAT(buildDependency.usedMacros, ElementsAre(UsedMacro{"YI", 1}, UsedMacro{"ER", 2}, UsedMacro{"LIANG", 2}, UsedMacro{"SAN", 10}));
}
}