#ifndef CREATURELIB_BATTLE_HPP
#define CREATURELIB_BATTLE_HPP

#include "../EventHooks/EventHook.hpp"
#include "../Flow/ChoiceQueue.hpp"
#include "../History/HistoryHolder.hpp"
#include "../Library/BattleLibrary.hpp"
#include "../TurnChoices/BaseTurnChoice.hpp"
#include "BattleParty.hpp"
#include "BattleRandom.hpp"
#include "BattleResult.hpp"
#include "BattleSide.hpp"
#include "CreatureIndex.hpp"

namespace CreatureLib::Battling {
    class Battle : public ScriptSource {
    protected:
        ArbUt::BorrowedPtr<const BattleLibrary> _library;
        ArbUt::UniquePtrList<BattleParty> _parties;
        bool _canFlee;
        uint8_t _numberOfSides;
        uint8_t _creaturesPerSide;
        ArbUt::UniquePtrList<BattleSide> _sides;
        BattleRandom _random;
        std::unique_ptr<ChoiceQueue> _currentTurnQueue = nullptr;
        bool _hasEnded = false;
        BattleResult _battleResult = BattleResult::Empty();
        EventHook _eventHook;
        HistoryHolder _historyHolder;

        uint32_t _currentTurn = 0;

        ScriptSet _volatile;
        long _lastTurnTime;

    public:
        Battle(const BattleLibrary* library, ArbUt::List<BattleParty*> parties, bool canFlee = true,
               uint8_t numberOfSides = 2, uint8_t creaturesPerSide = 1,
               uint_fast32_t randomSeed = std::chrono::duration_cast<std::chrono::milliseconds>(
                                              std::chrono::system_clock::now().time_since_epoch())
                                              .count())
            : _library(library), _parties(parties.GetStdList()), _canFlee(canFlee), _numberOfSides(numberOfSides),
              _creaturesPerSide(creaturesPerSide), _sides(numberOfSides), _random(randomSeed) {
            EnsureAllNotNull(parties);

            for (size_t i = 0; i < numberOfSides; i++) {
                _sides.Append(new BattleSide(i, this, creaturesPerSide));
            }
        }

        virtual ~Battle() = default;

        [[nodiscard]] const ArbUt::BorrowedPtr<const BattleLibrary>& GetLibrary() const noexcept;
        [[nodiscard]] uint32_t GetCurrentTurn() const noexcept { return _currentTurn; }
        inline uint8_t GetCreaturesPerSide() const noexcept { return _creaturesPerSide; }

        virtual bool CanUse(const ArbUt::BorrowedPtr<BaseTurnChoice>& choice);
        virtual bool TrySetChoice(BaseTurnChoice* choice);

        bool CanFlee() const noexcept { return _canFlee; }

        void CheckChoicesSetAndRun();

        [[nodiscard]] ArbUt::BorrowedPtr<ChoiceQueue> GetCurrentTurnQueue() const noexcept;
        BattleRandom* GetRandom() noexcept;

        bool CreatureInField(ArbUt::BorrowedPtr<Creature> creature) const;

        const ArbUt::OptionalBorrowedPtr<Creature>& GetCreature(const CreatureIndex& target) const {
            return _sides[target.GetSideIndex()]->GetCreature(target.GetCreatureIndex());
        }
        const ArbUt::OptionalBorrowedPtr<Creature>& GetCreature(uint8_t side, uint8_t target) const {
            return _sides[side]->GetCreature(target);
        }

        void ForceRecall(uint8_t side, uint8_t index);
        void SwitchCreature(uint8_t side, uint8_t index, Creature* c);
        bool CanSlotBeFilled(uint8_t side, uint8_t index) const;

        size_t ScriptCount() const override;
        void GetActiveScripts(ArbUt::List<ScriptWrapper>& scripts) override;

        void ValidateBattleState();
        inline bool HasEnded() const noexcept { return _hasEnded; }
        inline const BattleResult& GetResult() const noexcept { return _battleResult; }

        const ArbUt::UniquePtrList<BattleParty>& GetParties() const noexcept { return _parties; }
        const ArbUt::UniquePtrList<BattleSide>& GetSides() const noexcept { return _sides; }
        std::optional<ArbUt::BorrowedPtr<Script>> GetVolatileScript(const ArbUt::StringView& key) const {
            return _volatile.Get(key);
        }
        std::optional<ArbUt::BorrowedPtr<Script>> GetVolatileScript(uint32_t keyHash) const noexcept {
            return _volatile.Get(keyHash);
        }
        void AddVolatileScript(const ArbUt::StringView& key);
        void AddVolatileScript(Script* script);
        void RemoveVolatileScript(const ArbUt::BasicStringView& name) { _volatile.Remove(name); }
        void RemoveVolatileScript(uint32_t keyHash) { _volatile.Remove(keyHash); }
        void RemoveVolatileScript(Script* script);
        bool HasVolatileScript(const ArbUt::BasicStringView& name) const { return _volatile.Has(name); }
        bool HasVolatileScript(uint32_t keyHash) const { return _volatile.Has(keyHash); }

        void DisplayText(const ArbUt::StringView& text);

        void RegisterEventListener(EventHook::EventHookFunc listener) { this->_eventHook.RegisterListener(listener); }
        template <EventDataType T, class... parameters> void TriggerEventListener(parameters... args) {
            try_creature(this->_eventHook.Trigger<T>(args...);, "Exception occurred during event trigger.");
        }
        EventHook& GetEventHook() noexcept { return _eventHook; }
        const EventHook& GetEventHook() const noexcept { return _eventHook; }

        template <HistoryElementType T, class... parameters> void RegisterHistoryElement(parameters... args) {
            try_creature(this->_historyHolder.Register<T>(args...);
                         , "Exception occurred during history element registration.");
        }
        const HistoryHolder& GetHistory() const noexcept { return _historyHolder; }

        long GetLastTurnTimeMicroseconds() const noexcept { return _lastTurnTime; }
    };
}

#endif // CREATURELIB_BATTLE_HPP