#include <catch2/catch_all.hpp>
#include <iostream>
#include <fstream>
#include "billy_objects.hpp"
#include "character_sheet.hpp"

using namespace character;

namespace character::test {
    struct DummyObject {
        BillyObjects::container objects;
    };

    void to_json(json &j, const DummyObject &a) {
        j.emplace(std::pair{ BillyObjects::json_key, json::array() });
        BillyObjects::to_json(j.at(BillyObjects::json_key), a.objects);
    }

    void from_json(const json &j, DummyObject &dummy) {
        BillyObjects::from_json(j, dummy.objects);
    }
}

TEST_CASE("[C] Serialize empty BillyObjects", "[serialize][0]") {
    CharacterSheet sheet;
    json serializer;

    REQUIRE_NOTHROW(serializer.emplace("sheet", sheet));

    const auto tester = serializer.at("sheet").at(BillyObjects::json_key);
    serializer.clear();

    REQUIRE_NOTHROW(tester.empty() == true);
    REQUIRE(tester.empty());

    {
        std::ofstream file{ "billy_objects_empty.json" };
        file << tester << std::flush;
    }
}

TEST_CASE("[C] Serialize full BillyObjects", "[serialize][1]") {
    BillyObjects gestionnaire{};
    test::DummyObject dummy_object;
    {
        CharacterSheet sheet;
        gestionnaire.push_object(weapons::Sword, sheet);
        gestionnaire.push_object(tools::Fourche, sheet);
        gestionnaire.push_object(equipments::MedicKit, sheet);
        dummy_object.objects = sheet.get_objects();
    }

    json serializer;
    REQUIRE_NOTHROW(serializer.emplace("sheet", dummy_object));

    const auto &tester = serializer.at("sheet").at(BillyObjects::json_key);

    REQUIRE_FALSE(tester.empty());

    {
        std::ofstream file{ "billy_objects_full.json" };
        file << tester << std::flush;
    }
}

TEST_CASE("[D] Deserialize empty BillyObjects", "[deserialize][0]") {
    BillyObjects gestionnaire{};
    test::DummyObject dummy_object;

    const auto deserializer = []() -> json {
        std::ifstream file{ "billy_objects_empty.json" };
        return json::parse(file);
    }();

    REQUIRE_NOTHROW(deserializer.get_to(dummy_object));

    REQUIRE_FALSE(!dummy_object.objects.empty());
}

TEST_CASE("[D] Deserialize full BillyObjects", "[deserialize][1]") {
    BillyObjects gestionnaire{};
    test::DummyObject dummy_object;

    const auto deserializer = []() -> json {
        std::ifstream file{ "billy_objects_full.json" };
        return json::parse(file);
    }();

    REQUIRE_NOTHROW(deserializer.get_to(dummy_object));

    REQUIRE_FALSE(dummy_object.objects.empty());

    REQUIRE_FALSE(std::holds_alternative<tools>(dummy_object.objects[0]));
    REQUIRE(std::holds_alternative<weapons>(dummy_object.objects[0]));
    REQUIRE(std::get<weapons>(dummy_object.objects[0]) == weapons::Sword);

    REQUIRE_FALSE(std::holds_alternative<weapons>(dummy_object.objects[1]));
    REQUIRE(std::holds_alternative<tools>(dummy_object.objects[1]));
    REQUIRE(std::get<tools>(dummy_object.objects[1]) == tools::Fourche);

    REQUIRE_FALSE(std::holds_alternative<weapons>(dummy_object.objects[2]));
    REQUIRE(std::holds_alternative<equipments>(dummy_object.objects[2]));
    REQUIRE(std::get<equipments>(dummy_object.objects[2]) == equipments::MedicKit);
}

TEST_CASE("[D] Pushing popping BillyObjects", "[pushpop][0]") {
    constexpr std::array<BillyObjects::billyObject, 12> all_objects{
            weapons::Sword,
            weapons::Lance,
            weapons::Morgenstern,
            weapons::Bow,
            equipments::Chainmail,
            equipments::CookingPot,
            equipments::PamphletTourist,
            equipments::MedicKit,
            tools::Fourche,
            tools::Dagger,
            tools::RockClimbingKit,
            tools::SackOfGrain,
    };

    BillyObjects gestionnaire{};
    CharacterSheet sheet;
    REQUIRE(sheet.get_objects().empty());

    REQUIRE_NOTHROW(gestionnaire.push_object(weapons::Sword, sheet));
    REQUIRE_FALSE(sheet.get_objects().empty());
    REQUIRE(std::holds_alternative<weapons>(sheet.get_objects().back()));
    REQUIRE(std::get<weapons>(sheet.get_objects().back()) == weapons::Sword);

    REQUIRE_NOTHROW(gestionnaire.pop_object(sheet));
    REQUIRE(sheet.get_objects().empty());

    for (std::size_t j = 0; j < all_objects.size(); j += 3) {
        for (std::size_t i = 0; i < 3; ++i) {
            REQUIRE_NOTHROW(gestionnaire.push_object(all_objects[i + j], sheet));
        }
        REQUIRE_FALSE(sheet.get_objects().empty());

        for (std::size_t i = 0; i < 3; ++i) {
            REQUIRE_NOTHROW(gestionnaire.pop_object(sheet));
        }
        REQUIRE(sheet.get_objects().empty());
    }
}

TEST_CASE("[D] Printing Billy's objects", "[printing]") {
    for (const auto &object: BillyObjects::all_objects) {
        REQUIRE_NOTHROW(BillyObjects::billy_object_to_string(object));
    }
}

TEST_CASE("[Z] Cleaning after all tests", "[cleaning]") {
    namespace fs = std::filesystem;
    const auto pwd = is_directory(fs::current_path()) ?
                     fs::directory_iterator(fs::current_path()) :
                     fs::directory_iterator(fs::current_path().root_directory());
    for (const auto &entry: pwd) {
        if (entry.is_regular_file() && entry.path().extension() == ".json") {
            fs::remove(entry);
        }
    }
}