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#include "googletest.h"

#include "mocksqlitedatabase.h"
#include "mocksqlitereadstatement.h"

#include <querysqlitestatementfactory.h>
#include <refactoringdatabaseinitializer.h>
#include <symbolquery.h>

#include <sqlitedatabase.h>
#include <sqlitereadstatement.h>
#include <sqlitewritestatement.h>

namespace {

using ClangRefactoring::QuerySqliteStatementFactory;
using Sqlite::Database;
using ClangBackEnd::SourceLocationKind;
using ClangBackEnd::SymbolKind;
using MockStatementFactory = QuerySqliteStatementFactory<MockSqliteDatabase,
                                                         MockSqliteReadStatement>;
using MockQuery = ClangRefactoring::SymbolQuery<MockStatementFactory>;

using RealStatementFactory = QuerySqliteStatementFactory<Sqlite::Database,
                                                         Sqlite::ReadStatement>;
using RealQuery = ClangRefactoring::SymbolQuery<RealStatementFactory>;

class SymbolQuery : public testing::Test
{
protected:
    NiceMock<MockSqliteDatabase> mockDatabase;
    MockStatementFactory mockStatementFactory{mockDatabase};
    MockSqliteReadStatement &selectLocationsForSymbolLocation = mockStatementFactory.selectLocationsForSymbolLocation;
    MockSqliteReadStatement &selectSourceUsagesForSymbolLocation = mockStatementFactory.selectSourceUsagesForSymbolLocation;
    MockSqliteReadStatement &selectSymbolsForKindAndStartsWith = mockStatementFactory.selectSymbolsForKindAndStartsWith;
    MockSqliteReadStatement &selectSymbolsForKindAndStartsWith2 = mockStatementFactory.selectSymbolsForKindAndStartsWith2;
    MockSqliteReadStatement &selectSymbolsForKindAndStartsWith3 = mockStatementFactory.selectSymbolsForKindAndStartsWith3;
    MockSqliteReadStatement &selectLocationOfSymbol = mockStatementFactory.selectLocationOfSymbol;
    SourceLocations locations{{1, 1, 1},
                              {1, 2, 3},
                              {2, 1, 1},
                              {2, 3, 1},
                              {4, 1, 1},
                              {4, 1, 3}};
    MockQuery query{mockStatementFactory};
};

class SymbolQuerySlowTest : public testing::Test
{
protected:
    void SetUp() override
    {
        database.execute("INSERT INTO sources VALUES (1, 1, \"filename.h\")");
        database.execute("INSERT INTO sources VALUES (2, 1, \"filename.cpp\")");
        database.execute("INSERT INTO directories VALUES (1, \"/path/to\")");
        database.execute("INSERT INTO locations VALUES (1, 2, 3, 1, 1)");
        database.execute("INSERT INTO locations VALUES (1, 4, 6, 2, 3)");
        database.execute("INSERT INTO symbols VALUES (1, \"functionusr\", \"Function\", 3, \"void function(int)\")");
        database.execute("INSERT INTO symbols VALUES (2, \"classusr\", \"Class\", 2, \"class Class final\")");
        database.execute("INSERT INTO symbols VALUES (3, \"enumusr\", \"Enum\", 1, \"enum Enum : char\")");
    }

protected:
    Sqlite::Database database{":memory:", Sqlite::JournalMode::Memory};
    ClangBackEnd::RefactoringDatabaseInitializer<Sqlite::Database> initializer{database};
    RealStatementFactory realStatementFactory{database};
    RealQuery query{realStatementFactory};
};

TEST_F(SymbolQuery, LocationsAtCallsValues)
{
    EXPECT_CALL(selectLocationsForSymbolLocation, valuesReturnSourceLocations(_, 42, 14, 7));

    query.locationsAt(42, 14, 7);
}

TEST_F(SymbolQuerySlowTest, LocationsAt)
{
    auto locations = query.locationsAt(2, 4, 6);

    ASSERT_THAT(locations,
                UnorderedElementsAre(SourceLocation(1, 2, 3),
                                     SourceLocation(2, 4, 6)));
}

TEST_F(SymbolQuery, SourceUsagesAtCallsValues)
{
    EXPECT_CALL(selectSourceUsagesForSymbolLocation, valuesReturnSourceUsages(_, 42, 14, 7));

    query.sourceUsagesAt(42, 14, 7);
}

TEST_F(SymbolQuerySlowTest, SourceUsagesAt)
{
    auto usages = query.sourceUsagesAt(2, 4, 6);

    ASSERT_THAT(usages,
                UnorderedElementsAre(CppTools::Usage("/path/to/filename.h", 2, 3),
                                     CppTools::Usage("/path/to/filename.cpp", 4, 6)));
}

TEST_F(SymbolQuery, SymbolsCallsValuesWithOneKindParameter)
{
    EXPECT_CALL(selectSymbolsForKindAndStartsWith, valuesReturnSymbols(100, int(SymbolKind::Record), Eq("foo")));

    query.symbols({SymbolKind::Record}, "foo");
}

TEST_F(SymbolQuerySlowTest, SymbolsWithOneKindParameters)
{
    auto symbols = query.symbols({SymbolKind::Record}, "Cla%");

    ASSERT_THAT(symbols,
                UnorderedElementsAre(Symbol{2, "Class", "class Class final"}));
}

TEST_F(SymbolQuerySlowTest, SymbolsWithEmptyKinds)
{
    auto symbols = query.symbols({}, "%");

    ASSERT_THAT(symbols, IsEmpty());
}

TEST_F(SymbolQuery, SymbolsCallsValuesWithTwoKindParameters)
{
    EXPECT_CALL(selectSymbolsForKindAndStartsWith2, valuesReturnSymbols(100, int(SymbolKind::Record), int(SymbolKind::Function), Eq("foo")));

    query.symbols({SymbolKind::Record, SymbolKind::Function}, "foo");
}

TEST_F(SymbolQuerySlowTest, SymbolsWithTwoKindParameters)
{
    auto symbols = query.symbols({SymbolKind::Record, SymbolKind::Function}, "%c%");

    ASSERT_THAT(symbols,
                UnorderedElementsAre(Symbol{2, "Class", "class Class final"},
                                     Symbol{1, "Function", "void function(int)"}));
}

TEST_F(SymbolQuery, SymbolsCallsValuesWithThreeKindParameters)
{
    EXPECT_CALL(selectSymbolsForKindAndStartsWith3, valuesReturnSymbols(100, int(SymbolKind::Record), int(SymbolKind::Function), int(SymbolKind::Enumeration), Eq("foo")));

    query.symbols({SymbolKind::Record, SymbolKind::Function, SymbolKind::Enumeration}, "foo");
}

TEST_F(SymbolQuerySlowTest, SymbolsWithThreeKindParameters)
{
    auto symbols = query.symbols({SymbolKind::Record, SymbolKind::Function, SymbolKind::Enumeration}, "%");

    ASSERT_THAT(symbols,
                UnorderedElementsAre(Symbol{2, "Class", "class Class final"},
                                     Symbol{1, "Function", "void function(int)"},
                                     Symbol{3, "Enum", "enum Enum : char"}));
}

TEST_F(SymbolQuery, LocationForSymbolIdCallsValueReturningSourceLocation)
{
    EXPECT_CALL(selectLocationOfSymbol, valueReturnSourceLocation(1, int(SourceLocationKind::Definition)));

    query.locationForSymbolId(1, SourceLocationKind::Definition);
}

TEST_F(SymbolQuerySlowTest, LocationForSymbolId)
{
    auto location = query.locationForSymbolId(1, SourceLocationKind::Definition);

    ASSERT_THAT(location.value(), Eq(SourceLocation(2, {4, 6})));
}

}