#ifndef _RIVE_FILE_HPP_
#define _RIVE_FILE_HPP_

#include "rive/artboard.hpp"
#include "rive/backboard.hpp"
#include "rive/factory.hpp"
#include "rive/file_asset_loader.hpp"
#include "rive/assets/manifest_asset.hpp"
#include "rive/viewmodel/data_enum.hpp"
#include "rive/viewmodel/viewmodel_component.hpp"
#include "rive/viewmodel/viewmodel_instance.hpp"
#include "rive/viewmodel/viewmodel_instance_value.hpp"
#include "rive/viewmodel/viewmodel_instance_viewmodel.hpp"
#include "rive/viewmodel/viewmodel_instance_list_item.hpp"
#include "rive/animation/keyframe_interpolator.hpp"
#include "rive/data_bind/converters/data_converter.hpp"
#include "rive/refcnt.hpp"
#include "rive/data_resolver.hpp"
#include <vector>
#include <set>
#include <unordered_map>

#ifdef WITH_RIVE_SCRIPTING
struct lua_State;
#endif

///
/// Default namespace for Rive Cpp runtime code.
///
namespace rive
{
#ifdef WITH_RIVE_TOOLS
class ViewModelInstance;
typedef void (*ViewModelInstanceCreated)(ViewModelInstance* instance);
#endif
class BinaryReader;
class DataBind;
class RuntimeHeader;
class Factory;
class ScrollPhysics;
class ViewModelRuntime;
class BindableArtboard;
#ifdef WITH_RIVE_SCRIPTING
class CPPRuntimeScriptingContext;
class ScriptingVM;
#endif

///
/// Tracks the success/failure result when importing a Rive file.
///
enum class ImportResult
{
    /// Indicates that a file's been successfully imported.
    success,
    /// Indicates that the Rive file is not supported by this runtime.
    unsupportedVersion,
    /// Indicates that the there is a formatting problem in the file itself.
    malformed
};

///
/// A Rive file.
///
class File : public RefCnt<File>
{
public:
    /// Major version number supported by the runtime.
    static const int majorVersion = 7;
    /// Minor version number supported by the runtime.
    static const int minorVersion = 0;

    File(Factory*, rcp<FileAssetLoader>);

public:
    ~File();
#if defined(DEBUG) && defined(WITH_RIVE_TOOLS)
    static size_t debugTotalFileCount;
#endif
    ///
    /// Imports a Rive file from a binary buffer.
    /// @param data the raw date of the file.
    /// @param result is an optional status result.
    /// @param assetLoader is an optional helper to load assets which
    /// cannot be found in-band.
    /// @returns a pointer to the file, or null on failure.
    static rcp<File> import(Span<const uint8_t> data,
                            Factory* factory,
                            ImportResult* result = nullptr,
                            FileAssetLoader* assetLoader = nullptr)
    {
        return import(data, factory, result, ref_rcp(assetLoader));
    }

    static rcp<File> import(Span<const uint8_t> data,
                            Factory*,
                            ImportResult* result,
                            rcp<FileAssetLoader> assetLoader);

    /// @returns the file's backboard. All files have exactly one backboard.
    Backboard* backboard() const { return m_backboard; }

    /// @returns the number of artboards in the file.
    size_t artboardCount() const { return m_artboards.size(); }
    std::string artboardNameAt(size_t index) const;

    Span<const rcp<FileAsset>> assets() const;

    // Instances
    std::unique_ptr<ArtboardInstance> artboardDefault() const;
    std::unique_ptr<ArtboardInstance> artboardAt(size_t index) const;
    std::unique_ptr<ArtboardInstance> artboardNamed(std::string name) const;
    rcp<BindableArtboard> bindableArtboardNamed(std::string name) const;
    rcp<BindableArtboard> bindableArtboardDefault() const;
    rcp<BindableArtboard> internalBindableArtboardFromArtboard(Artboard*) const;

    Artboard* artboard() const;

    /// @returns the named artboard. If no artboard is found with that name,
    /// the null pointer is returned.
    Artboard* artboard(std::string name) const;

    /// @returns the artboard at the specified index, or the nullptr if the
    /// index is out of range.
    Artboard* artboard(size_t index) const;

    /// @returns a view model instance of the view model with the specified
    /// name.
    rcp<ViewModelInstance> createViewModelInstance(std::string name) const;

    /// @returns a view model instance attached to the artboard if it exists.
    rcp<ViewModelInstance> createViewModelInstance(Artboard* artboard) const;

    /// @returns a view model instance of the viewModel.
    rcp<ViewModelInstance> createViewModelInstance(ViewModel* viewModel) const;

    /// @returns the default view model instance of the viewModel, or returns an
    /// empty one if there is no default.
    rcp<ViewModelInstance> createDefaultViewModelInstance(
        ViewModel* viewModel) const;

    /// @returns the default view model instance of the viewModel, or returns an
    /// empty one if there is no default.
    rcp<ViewModelInstance> createDefaultViewModelInstance(
        Artboard* artboard) const;

    /// @returns a view model instance of the viewModel by name and instance
    /// name.
    rcp<ViewModelInstance> createViewModelInstance(
        std::string name,
        std::string instanceName) const;

    /// @returns a view model instance of the viewModel by their indexes.
    rcp<ViewModelInstance> createViewModelInstance(size_t index,
                                                   size_t instanceIndex) const;

    size_t viewModelCount() const { return m_ViewModels.size(); }
    ViewModel* viewModel(std::string name);
    ViewModel* viewModel(size_t index);
    ViewModelRuntime* defaultArtboardViewModel(Artboard* artboard) const;
    ViewModelRuntime* viewModelByIndex(size_t index) const;
    ViewModelRuntime* viewModelByName(std::string name) const;
    ViewModelInstanceListItem* viewModelInstanceListItem(
        rcp<ViewModelInstance> viewModelInstance);
    ViewModelInstanceListItem* viewModelInstanceListItem(
        rcp<ViewModelInstance> viewModelInstance,
        Artboard* artboard);
    void completeViewModelInstance(
        rcp<ViewModelInstance> viewModelInstance,
        std::unordered_map<ViewModelInstance*, rcp<ViewModelInstance>>&
            instancesMap) const;
    void completeViewModelInstance(
        rcp<ViewModelInstance> viewModelInstance) const;
    const std::vector<DataEnum*>& enums() const;
    rcp<FileAsset> asset(size_t index);

    std::vector<Artboard*> artboards() { return m_artboards; };

    // When the runtime is hosted in the editor, we get a pointer
    // to the VM that we can use. If this is nullptr, we can assume
    // we are running in the runtime and should instance our own VMs
    // and pass them down to the root
#ifdef WITH_RIVE_SCRIPTING
    void scriptingVM(lua_State* vm)
    {
        cleanupScriptingVM();
        m_luaState = vm;
    }
    lua_State* scriptingVM()
    {
        // For now, if we don't have a vm, create one. In the future, we
        // may need a way to create multiple vms in parallel
        if (m_luaState == nullptr)
        {
            makeScriptingVM();
        }
        return m_luaState;
    }
#ifdef WITH_RIVE_TOOLS
    void clearScriptingVM() { cleanupScriptingVM(); }
    bool hasVM() { return m_luaState != nullptr; }
#endif
#endif

    DataResolver* dataResolver()
    {
        if (m_manifest)
        {
            return m_manifest.get()->as<ManifestAsset>();
        }
        return nullptr;
    }

#ifdef WITH_RIVE_TOOLS
    /// Strips FileAssetContents for FileAssets of given typeKeys.
    /// @param data the raw data of the file.
    /// @param result is an optional status result.
    /// @returns the data buffer of the file with the FileAssetContents objects
    /// stripped out.
    static const std::vector<uint8_t> stripAssets(
        Span<const uint8_t> data,
        std::set<uint16_t> typeKeys,
        ImportResult* result = nullptr);
#endif

#ifdef TESTING
    FileAssetLoader* testing_getAssetLoader() const
    {
        return m_assetLoader.get();
    }
#endif
#ifdef WITH_RIVE_TOOLS
    void onViewModelInstanceCreated(ViewModelInstanceCreated callback)
    {
        m_viewmodelInstanceCreatedCallback = callback;
    }
    void triggerViewModelCreatedCallback(bool value)
    {
        m_triggerViewModelCreatedCallback = value;
    }
#endif

private:
    ImportResult read(BinaryReader&, const RuntimeHeader&);

    /// The file's backboard. All Rive files have a single backboard
    /// where the artboards live.
    Backboard* m_backboard;

    /// We just keep these alive for the life of this File
    std::vector<rcp<FileAsset>> m_fileAssets;

    std::vector<DataConverter*> m_DataConverters;

    std::vector<KeyFrameInterpolator*> m_keyframeInterpolators;
    std::vector<ScrollPhysics*> m_scrollPhysics;

    /// List of artboards in the file. Each artboard encapsulates a set of
    /// Rive components and animations.
    std::vector<Artboard*> m_artboards;

    /// List of view models in the file. They may outlive the file if viewmodel
    /// instances are still needed after the file is destroyed
    std::vector<ViewModel*> m_ViewModels;

    /// List of view models instances in the file. We keep this list to keep
    /// them alive during the lifetime of this file. This list does not hold a
    /// reference to instances created by users.
    std::vector<ViewModelInstance*> m_ViewModelInstances;

    mutable std::vector<rcp<ViewModelRuntime>> m_viewModelRuntimes;
    std::vector<DataEnum*> m_Enums;

    Factory* m_factory;

    /// The helper used to load assets when they're not provided in-band
    /// with the file.
    rcp<FileAssetLoader> m_assetLoader;

#ifdef WITH_RIVE_SCRIPTING
    lua_State* m_luaState = nullptr;
    std::unique_ptr<CPPRuntimeScriptingContext> m_scriptingContext;
    std::unique_ptr<ScriptingVM> m_scriptingVM;
    void makeScriptingVM();
    void cleanupScriptingVM();
    void registerScripts();
#endif

    rcp<ViewModelInstance> copyViewModelInstance(
        ViewModelInstance* viewModelInstance,
        std::unordered_map<ViewModelInstance*, rcp<ViewModelInstance>>&
            instancesMap) const;

    rcp<ViewModelRuntime> createViewModelRuntime(ViewModel* viewModel) const;

    uint32_t findViewModelId(ViewModel* search) const;
#ifdef WITH_RIVE_TOOLS
    ViewModelInstanceCreated m_viewmodelInstanceCreatedCallback = nullptr;
    bool m_triggerViewModelCreatedCallback = false;
#endif

    rcp<FileAsset> m_manifest = nullptr;
};
} // namespace rive
#endif