#pragma once

#include <string>

#include "cpputils/unique_ptr.hpp"
#include "entities/game_object.hpp"
#include "levels/goal.hpp"
#include "levels/level.hpp"
#include "levels/scene.hpp"
#include "levels/progression.hpp"
#include "utils/globals.hpp"

namespace
Nimbin
{

class  CelebrationSystem;
class  HintSystem;
class  ParticleSystem;
class  Plate;
class  WordAiSystem;
struct GameContext;


namespace Level
{

struct StepLedger
{
    DynArray<PultAction>  buttons_pressed;
    DynArray<std::string> ai_defeated;
    DynArray<std::string> picked_up;
    bool compile_ok {false};
    bool dropped    {false};
    bool shot       {false};

    void clear() {
        buttons_pressed.clear();
        ai_defeated    .clear();
        picked_up      .clear();
        compile_ok = false;
        dropped    = false;
        shot       = false;
    }
};


struct StepPlate
{
    Plate*      plate;
    std::string tag;
};


class Director
{
    DynArray<StepPlate>    _step_plates;
    DynArray<GameObject*>  _step_scenery;

    StepLedger             _ledger;

    cpputils::unique_ptr<Level::Progression>
                           _runner;

    double _step_age { 0.0 };

    mutable const Level::Step*       _detail_built_for { nullptr };
    mutable DynArray<Text::TokenPtr> _detail_tokens;

    void spawn_Grants  (GameContext& ctx);
    void setup_Scene   (GameContext& ctx, const Scene::Data& scene);
    void teardown_Scene(GameContext& ctx);

    Goal::Context build_GoalCtx (const GameContext& ctx) const;

public:
    struct AdvanceResult {
        bool stepped     {false};   // a step boundary was crossed this frame
        bool advanced    {false};   // ...and there is a real next step
        bool reset_carry {false};   // next step requests carry/projectile wipe
    };

    explicit Director(const Level::Data& level);

    void enter_Step(GameContext& ctx);

    AdvanceResult try_Advance(GameContext& ctx, double dt,
                              CelebrationSystem& celebration,
                              ParticleSystem& particles);

    void show_Details(GameContext& ctx) const;

    void record_PickedUp  (const std::string& t) { _ledger.picked_up.push_back(t); }
    void record_Shot      ()                     { _ledger.shot = true; }
    void record_Dropped   ()                     { _ledger.dropped = true; }
    void record_Button    (PultAction a)         { _ledger.buttons_pressed.push_back(a); }
    void record_AiDefeated(const std::string& t) { _ledger.ai_defeated.push_back(t); }
    void record_CompileOk ()                     { _ledger.compile_ok = true; }

    bool                 is_LevelComplete() const { return _runner->is_Complete(); }

    Level::Progression&       get_Runner()             { return *_runner; }
    const Level::Progression& get_Runner()       const { return *_runner; }
    const std::string&        get_CurrentHint()  const { return _runner->get_Current().hint; }
    int                       get_MaxAiForStep() const;
    DynArray<StepPlate>&      get_StepPlates()         { return _step_plates; }
};


} // namespace Level

} // namespace Nimbin