#include "Test/Tester.h"
#include "Feature/DocumentSymbol.h"
#include "AST/Utility.h"

namespace clice::testing {

namespace {

suite<"DocumentSymbol"> document_symbol = [] {
    Tester tester;
    std::vector<feature::DocumentSymbol> symbols;

    auto run = [&](llvm::StringRef code) {
        tester.clear();
        tester.add_main("main.cpp", code);
        tester.compile_with_pch();
        expect(that % tester.unit.has_value());
        symbols = feature::document_symbols(*tester.unit);
    };

    auto total_size_wrapper = [](const std::vector<feature::DocumentSymbol>& result) -> size_t {
        size_t size = 0;
        std::function<void(const std::vector<feature::DocumentSymbol>&, size_t&)> total_size =
            [&total_size](const std::vector<feature::DocumentSymbol>& result, size_t& size) {
                for(auto& item: result) {
                    ++size;
                    total_size(item.children, size);
                }
            };
        total_size(result, size);
        return size;
    };

    test("Namespace") = [&] {
        const char* main = R"cpp(
namespace _1 {
    namespace _2 {

    }
}

namespace _1 {
    namespace _2 {
        namespace _3 {
        }
    }
}

namespace {}

namespace _1::_2{
}
)cpp";

        run(main);
        expect(that % total_size_wrapper(symbols) == 8);
    };

    test("Struct") = [&] {
        const char* main = R"cpp(
struct _1 {};
struct _2 {};

struct _3 {
    struct _4 {};
    struct _5 {};
};
)cpp";

        run(main);
        expect(that % total_size_wrapper(symbols) == 5);
    };

    test("Field") = [&] {
        const char* main = R"cpp(
struct x {
    int x1;
    int x2;

    struct y {
        int y1;
        int y2;
    };

    static int x3;
};
)cpp";

        run(main);
        expect(that % total_size_wrapper(symbols) == 7);
    };

    test("Constructor") = [&] {
        const char* main = R"cpp(
struct S {
    int x;

    S(): x(0) {}
    S(int x) : x(x) {}
    S(const S& s) : x(s.x) {}
    ~S() {}
};
)cpp";
        run(main);
        expect(that % total_size_wrapper(symbols) == 6);
    };

    test("Method") = [&] {
        const char* main = R"cpp(

struct _0 {
    void f(int x) {}
    void f(int* x) {}
    void f1(int& x) {}
    void f2(const int& x) {}
    void f2(const _0& x) {}
    void f2(_0 x) {}
};
)cpp";

        run(main);
        expect(that % total_size_wrapper(symbols) == 7);
    };

    test("Enum") = [&] {
        const char* main = R"cpp(

enum class A {
    _1,
    _2,
    _3,
};

enum B {
    _a,
    _b,
    _c,
};
)cpp";

        run(main);
        expect(that % total_size_wrapper(symbols) == 8);
    };

    test("TopLevelVariable") = [&] {
        const char* main = R"cpp(
constexpr auto x = 1;
int y = 2;
)cpp";

        run(main);
        expect(that % total_size_wrapper(symbols) == 2);
    };

    test("Macro") = [&] {
        const char* main = R"cpp(
#define CLASS(X) class X

CLASS(test) {
    int x = 1;
};

#define VAR(X) int X = 1;
VAR(test)
)cpp";

        run(main);

        /// expect(that % total_size_wrapper(symbols) == 3);
    };
};

}  // namespace

}  // namespace clice::testing