#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <vector>

#include "Test/Test.h"
#include "Support/JSON.h"

#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/SmallString.h"

namespace {

struct ValueRef {
    std::size_t index;
};

}  // namespace

template <>
struct clice::json::Serde<ValueRef> {
    constexpr inline static bool stateful = true;

    std::vector<int>& encoder;
    std::vector<int>& decoder;

    json::Value serialize(const ValueRef& ref) {
        return json::Value(decoder[ref.index]);
    }

    ValueRef deserialize(const json::Value& value) {
        encoder.emplace_back(*value.getAsInteger());
        return ValueRef{encoder.size() - 1};
    }
};

namespace clice::testing {

namespace {

suite<"JSON"> json_tests = [] {
    test("String") = [&] {
        json::Value expected = "hello";

        std::string input = "hello";
        expect(json::serialize(input) == expected);
        expect(json::deserialize<std::string>(expected) == input);

        std::string_view input2 = "hello";
        expect(json::serialize(input2) == expected);
        expect(json::deserialize<std::string_view>(expected) == input2);

        llvm::StringRef input3 = "hello";
        expect(json::serialize(input3) == expected);
        expect(json::deserialize<llvm::StringRef>(expected) == input3);

        llvm::SmallString<5> input4 = {"hello"};
        expect(json::serialize(input4) == expected);
        expect(json::deserialize<llvm::SmallString<5>>(expected) == input4);
    };

    test("MapRange") = [&] {
        json::Value expected = json::Object{
            {"1", 2},
            {"3", 4},
            {"5", 6}
        };

        std::map<int, int> input = {
            {1, 2},
            {3, 4},
            {5, 6}
        };

        expect(json::serialize(input) == expected);
        expect(input == json::deserialize<decltype(input)>(expected));

        std::unordered_map<int, int> input2 = {
            {1, 2},
            {3, 4},
            {5, 6}
        };
        expect(json::serialize(input2) == expected);
        expect(input2 == json::deserialize<decltype(input2)>(expected));

        llvm::DenseMap<int, int> input4 = {
            {1, 2},
            {3, 4},
            {5, 6}
        };
        expect(json::serialize(input4) == expected);
        expect(input4 == json::deserialize<decltype(input4)>(expected));
    };

    test("SetRange") = [&] {
        json::Value expected = {1, 2, 3, 4, 5};

        std::set<int> input = {1, 2, 3, 4, 5};
        expect(input == json::deserialize<decltype(input)>(expected));

        std::unordered_set<int> input2 = {1, 2, 3, 4, 5};
        expect(input2 == json::deserialize<decltype(input2)>(expected));
    };

    test("SequenceRange") = [&] {
        json::Value expected = {1, 2, 3, 4, 5};

        std::vector<int> input = {1, 2, 3, 4, 5};
        expect(json::serialize(input) == expected);
        expect(json::deserialize<std::vector<int>>(expected) == input);

        llvm::ArrayRef<int> input2 = input;
        expect(json::serialize(input2) == expected);

        llvm::SmallVector<int, 5> input3 = {1, 2, 3, 4, 5};
        expect(json::serialize(input3) == expected);
        expect((json::deserialize<llvm::SmallVector<int, 5>>(expected)) == input3);
    };

    test("Enum") = [&] {
        enum class E { A, B, C };

        json::Value expected = json::Value(1);

        E input = E::B;
        expect(json::serialize(input) == expected);
        expect(json::deserialize<E>(expected) == input);

        struct Color : refl::Enum<Color, false, int> {
            enum Kind {
                Red = 0,
                Green,
                Blue,
                Yellow,
            };

            using Enum::Enum;
        };

        json::Value expected2 = json::Value(2);

        Color input2 = Color::Blue;
        expect(json::serialize(input2) == expected2);
        expect(json::deserialize<Color>(expected2) == input2);
    };

    test("Struct") = [&] {
        struct A {
            int x;
            int y;

            bool operator== (const A& other) const = default;
        };

        json::Value expected = json::Object{
            {"x", 1},
            {"y", 2}
        };

        A input = {1, 2};
        expect(json::serialize(input) == expected);
        expect(json::deserialize<A>(expected) == input);

        struct B {
            A a;
            std::string s;

            bool operator== (const B& other) const = default;
        };

        json::Value expected2 = json::Object{
            {"a", json::Object{{"x", 1}, {"y", 2}}},
            {"s", "hello"                         }
        };

        B input2 = {
            {1, 2},
            "hello",
        };
        expect(json::serialize(input2) == expected2);
        expect(json::deserialize<B>(expected2) == input2);
    };
};

}  // namespace

}  // namespace clice::testing