#include "data/BackendInterface.hpp"
#include "migration/MigratiorStatus.hpp"
#include "migration/TestMigrators.hpp"
#include "migration/impl/MigrationManagerBase.hpp"
#include "migration/impl/MigratorsRegister.hpp"
#include "util/MockBackendTestFixture.hpp"
#include "util/MockPrometheus.hpp"

#include <gmock/gmock.h>
#include <gtest/gtest.h>

#include <algorithm>
#include <memory>
#include <string>
#include <tuple>

using TestMigratorRegister = migration::impl::
    MigratorsRegister<data::BackendInterface, SimpleTestMigrator, SimpleTestMigrator2>;

using TestCassandramigrationInspector =
    migration::impl::MigrationInspectorBase<TestMigratorRegister>;

struct MigrationInspectorBaseTest : public util::prometheus::WithMockPrometheus,
                                    public MockBackendTest {
    MigrationInspectorBaseTest()
    {
        migrationInspector_ = std::make_shared<TestCassandramigrationInspector>(backend_);
    }

protected:
    std::shared_ptr<TestCassandramigrationInspector> migrationInspector_;
};

TEST_F(MigrationInspectorBaseTest, AllStatus)
{
    EXPECT_CALL(*backend_, fetchMigratorStatus("SimpleTestMigrator", testing::_))
        .WillOnce(testing::Return("Migrated"));
    EXPECT_CALL(*backend_, fetchMigratorStatus("SimpleTestMigrator2", testing::_))
        .WillOnce(testing::Return("NotMigrated"));
    auto const status = migrationInspector_->allMigratorsStatusPairs();
    EXPECT_EQ(status.size(), 2);
    EXPECT_TRUE(
        std::ranges::find(
            status, std::make_tuple("SimpleTestMigrator", migration::MigratorStatus::Migrated)
        ) != status.end()
    );
    EXPECT_TRUE(
        std::ranges::find(
            status, std::make_tuple("SimpleTestMigrator2", migration::MigratorStatus::NotMigrated)
        ) != status.end()
    );
}

TEST_F(MigrationInspectorBaseTest, AllNames)
{
    auto const names = migrationInspector_->allMigratorsNames();
    EXPECT_EQ(names.size(), 2);
    EXPECT_EQ(names[0], "SimpleTestMigrator");
    EXPECT_EQ(names[1], "SimpleTestMigrator2");
}

TEST_F(MigrationInspectorBaseTest, Description)
{
    EXPECT_EQ(migrationInspector_->getMigratorDescriptionByName("unknown"), "No Description");
    EXPECT_EQ(
        migrationInspector_->getMigratorDescriptionByName("SimpleTestMigrator"),
        "The migrator for version 0 -> 1"
    );
    EXPECT_EQ(
        migrationInspector_->getMigratorDescriptionByName("SimpleTestMigrator2"),
        "The migrator for version 1 -> 2"
    );
}

TEST_F(MigrationInspectorBaseTest, getMigratorStatusByName)
{
    EXPECT_CALL(*backend_, fetchMigratorStatus("SimpleTestMigrator", testing::_))
        .WillOnce(testing::Return("Migrated"));
    EXPECT_EQ(
        migrationInspector_->getMigratorStatusByName("SimpleTestMigrator"),
        migration::MigratorStatus::Migrated
    );

    EXPECT_CALL(*backend_, fetchMigratorStatus("SimpleTestMigrator2", testing::_))
        .WillOnce(testing::Return("NotMigrated"));
    EXPECT_EQ(
        migrationInspector_->getMigratorStatusByName("SimpleTestMigrator2"),
        migration::MigratorStatus::NotMigrated
    );
}

TEST_F(MigrationInspectorBaseTest, oneMigratorBlockingClio)
{
    EXPECT_CALL(*backend_, fetchMigratorStatus("SimpleTestMigrator", testing::_))
        .WillOnce(testing::Return("NotMigrated"));
    EXPECT_CALL(*backend_, fetchMigratorStatus("SimpleTestMigrator2", testing::_)).Times(0);

    EXPECT_TRUE(migrationInspector_->isBlockingClio());
}

TEST_F(MigrationInspectorBaseTest, oneMigratorBlockingClioGetMigrated)
{
    EXPECT_CALL(*backend_, fetchMigratorStatus("SimpleTestMigrator", testing::_))
        .WillOnce(testing::Return("Migrated"));
    EXPECT_CALL(*backend_, fetchMigratorStatus("SimpleTestMigrator2", testing::_)).Times(0);
    EXPECT_FALSE(migrationInspector_->isBlockingClio());
}

TEST_F(MigrationInspectorBaseTest, noMigratorBlockingClio)
{
    EXPECT_CALL(*backend_, fetchMigratorStatus).Times(0);

    auto const migrations = migration::impl::MigrationInspectorBase<
        migration::impl::
            MigratorsRegister<data::BackendInterface, SimpleTestMigrator2, SimpleTestMigrator3>>(
        backend_
    );
    EXPECT_FALSE(migrations.isBlockingClio());
}

TEST_F(MigrationInspectorBaseTest, isBlockingClioWhenNoMigrator)
{
    EXPECT_CALL(*backend_, fetchMigratorStatus).Times(0);

    auto const migrations = migration::impl::MigrationInspectorBase<
        migration::impl::MigratorsRegister<data::BackendInterface>>(backend_);
    EXPECT_FALSE(migrations.isBlockingClio());
}