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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#pragma once

#include <functional>
#include <mutex>
#include <unordered_map>

#include "common/input.h"
#include "common/param_package.h"
#include "common/point.h"
#include "common/quaternion.h"
#include "common/settings.h"
#include "common/vector_math.h"
#include "core/hid/hid_types.h"
#include "core/hid/motion_input.h"

namespace Core::HID {

struct ControllerMotionInfo {
    Input::MotionStatus raw_status;
    MotionInput emulated{};
};

using ButtonDevices =
    std::array<std::unique_ptr<Input::InputDevice>, Settings::NativeButton::NumButtons>;
using StickDevices =
    std::array<std::unique_ptr<Input::InputDevice>, Settings::NativeAnalog::NumAnalogs>;
using ControllerMotionDevices =
    std::array<std::unique_ptr<Input::InputDevice>, Settings::NativeMotion::NumMotions>;
using TriggerDevices =
    std::array<std::unique_ptr<Input::InputDevice>, Settings::NativeTrigger::NumTriggers>;
using BatteryDevices = std::array<std::unique_ptr<Input::InputDevice>, 2>;
using OutputDevices = std::array<std::unique_ptr<Input::OutputDevice>, 2>;

using ButtonParams = std::array<Common::ParamPackage, Settings::NativeButton::NumButtons>;
using StickParams = std::array<Common::ParamPackage, Settings::NativeAnalog::NumAnalogs>;
using ControllerMotionParams = std::array<Common::ParamPackage, Settings::NativeMotion::NumMotions>;
using TriggerParams = std::array<Common::ParamPackage, Settings::NativeTrigger::NumTriggers>;
using BatteryParams = std::array<Common::ParamPackage, 2>;
using OutputParams = std::array<Common::ParamPackage, 2>;

using ButtonValues = std::array<Input::ButtonStatus, Settings::NativeButton::NumButtons>;
using SticksValues = std::array<Input::StickStatus, Settings::NativeAnalog::NumAnalogs>;
using TriggerValues = std::array<Input::TriggerStatus, Settings::NativeTrigger::NumTriggers>;
using ControllerMotionValues = std::array<ControllerMotionInfo, Settings::NativeMotion::NumMotions>;
using ColorValues = std::array<Input::BodyColorStatus, 3>;
using BatteryValues = std::array<Input::BatteryStatus, 3>;
using VibrationValues = std::array<Input::VibrationStatus, 2>;

struct AnalogSticks {
    AnalogStickState left;
    AnalogStickState right;
};

struct ControllerColors {
    NpadControllerColor fullkey;
    NpadControllerColor left;
    NpadControllerColor right;
};

struct BatteryLevelState {
    NpadPowerInfo dual;
    NpadPowerInfo left;
    NpadPowerInfo right;
};

struct ControllerMotion {
    bool is_at_rest;
    Common::Vec3f accel{};
    Common::Vec3f gyro{};
    Common::Vec3f rotation{};
    std::array<Common::Vec3f, 3> orientation{};
};

using MotionState = std::array<ControllerMotion, 2>;

struct ControllerStatus {
    // Data from input_common
    ButtonValues button_values{};
    SticksValues stick_values{};
    ControllerMotionValues motion_values{};
    TriggerValues trigger_values{};
    ColorValues color_values{};
    BatteryValues battery_values{};
    VibrationValues vibration_values{};

    // Data for HID serices
    NpadButtonState npad_button_state{};
    DebugPadButton debug_pad_button_state{};
    AnalogSticks analog_stick_state{};
    MotionState motion_state{};
    NpadGcTriggerState gc_trigger_state{};
    ControllerColors colors_state{};
    BatteryLevelState battery_state{};
};

enum class ControllerTriggerType {
    Button,
    Stick,
    Trigger,
    Motion,
    Color,
    Battery,
    Vibration,
    Connected,
    Disconnected,
    Type,
    All,
};

struct ControllerUpdateCallback {
    std::function<void(ControllerTriggerType)> on_change;
};

class EmulatedController {
public:
    /**
     * Contains all input data related to this controller. Like buttons, joysticks, motion.
     * @param Npad id type for this specific controller
     */
    explicit EmulatedController(NpadIdType npad_id_type_);
    ~EmulatedController();

    YUZU_NON_COPYABLE(EmulatedController);
    YUZU_NON_MOVEABLE(EmulatedController);

    /// Converts the controller type from settings to npad type
    static NpadType MapSettingsTypeToNPad(Settings::ControllerType type);

    /// Converts npad type to the equivalent of controller type from settings
    static Settings::ControllerType MapNPadToSettingsType(NpadType type);

    /// Gets the NpadIdType for this controller
    NpadIdType GetNpadIdType() const;

    /// Sets the NpadType for this controller
    void SetNpadType(NpadType npad_type_);

    /**
     * Gets the NpadType for this controller
     * @param Returns the temporary value if true
     * @return NpadType set on the controller
     */
    NpadType GetNpadType(bool temporary = false) const;

    /// Sets the connected status to true
    void Connect();

    /// Sets the connected status to false
    void Disconnect();

    /**
     * Is the emulated connected
     * @param Returns the temporary value if true
     * @return true if the controller has the connected status
     */
    bool IsConnected(bool temporary = false) const;

    /// Returns true if vibration is enabled
    bool IsVibrationEnabled() const;

    /// Removes all callbacks created from input devices
    void UnloadInput();

    /// Sets the emulated console into configuring mode. Locking all HID service events from being
    /// moddified
    void EnableConfiguration();

    /// Returns the emulated console to the normal behaivour
    void DisableConfiguration();

    /// Returns true if the emulated device is on configuring mode
    bool IsConfiguring() const;

    /// Reload all input devices
    void ReloadInput();

    /// Overrides current mapped devices with the stored configuration and reloads all input devices
    void ReloadFromSettings();

    /// Saves the current mapped configuration
    void SaveCurrentConfig();

    /// Reverts any mapped changes made that weren't saved
    void RestoreConfig();

    /// Returns a vector of mapped devices from the mapped button and stick parameters
    std::vector<Common::ParamPackage> GetMappedDevices() const;

    // Returns the current mapped button device
    Common::ParamPackage GetButtonParam(std::size_t index) const;

    // Returns the current mapped stick device
    Common::ParamPackage GetStickParam(std::size_t index) const;

    // Returns the current mapped motion device
    Common::ParamPackage GetMotionParam(std::size_t index) const;

    /**
     * Updates the current mapped button device
     * @param ParamPackage with controller data to be mapped
     */
    void SetButtonParam(std::size_t index, Common::ParamPackage param);

    /**
     * Updates the current mapped stick device
     * @param ParamPackage with controller data to be mapped
     */
    void SetStickParam(std::size_t index, Common::ParamPackage param);

    /**
     * Updates the current mapped motion device
     * @param ParamPackage with controller data to be mapped
     */
    void SetMotionParam(std::size_t index, Common::ParamPackage param);

    /// Returns the latest button status from the controller with parameters
    ButtonValues GetButtonsValues() const;

    /// Returns the latest analog stick status from the controller with parameters
    SticksValues GetSticksValues() const;

    /// Returns the latest trigger status from the controller with parameters
    TriggerValues GetTriggersValues() const;

    /// Returns the latest motion status from the controller with parameters
    ControllerMotionValues GetMotionValues() const;

    /// Returns the latest color status from the controller with parameters
    ColorValues GetColorsValues() const;

    /// Returns the latest battery status from the controller with parameters
    BatteryValues GetBatteryValues() const;

    /// Returns the latest status of button input for the npad service
    NpadButtonState GetNpadButtons() const;

    /// Returns the latest status of button input for the debug pad service
    DebugPadButton GetDebugPadButtons() const;

    /// Returns the latest status of stick input from the mouse
    AnalogSticks GetSticks() const;

    /// Returns the latest status of trigger input from the mouse
    NpadGcTriggerState GetTriggers() const;

    /// Returns the latest status of motion input from the mouse
    MotionState GetMotions() const;

    /// Returns the latest color value from the controller
    ControllerColors GetColors() const;

    /// Returns the latest battery status from the controller
    BatteryLevelState GetBattery() const;

    /*
     * Sends a specific vibration to the output device
     * @return returns true if vibration had no errors
     */
    bool SetVibration(std::size_t device_index, VibrationValue vibration);

    /*
     * Sends a small vibration to the output device
     * @return returns true if SetVibration was successfull
     */
    bool TestVibration(std::size_t device_index);

    /// Returns the led pattern corresponding to this emulated controller
    LedPattern GetLedPattern() const;

    /// Asks the output device to change the player led pattern
    void SetLedPattern();

    /**
     * Adds a callback to the list of events
     * @param ConsoleUpdateCallback that will be triggered
     * @return an unique key corresponding to the callback index in the list
     */
    int SetCallback(ControllerUpdateCallback update_callback);

    /**
     * Removes a callback from the list stopping any future events to this object
     * @param Key corresponding to the callback index in the list
     */
    void DeleteCallback(int key);

private:
    /**
     * Updates the button status of the controller
     * @param callback: A CallbackStatus containing the button status
     * @param index: Button ID of the to be updated
     */
    void SetButton(Input::CallbackStatus callback, std::size_t index);

    /**
     * Updates the analog stick status of the controller
     * @param callback: A CallbackStatus containing the analog stick status
     * @param index: stick ID of the to be updated
     */
    void SetStick(Input::CallbackStatus callback, std::size_t index);

    /**
     * Updates the trigger status of the controller
     * @param callback: A CallbackStatus containing the trigger status
     * @param index: trigger ID of the to be updated
     */
    void SetTrigger(Input::CallbackStatus callback, std::size_t index);

    /**
     * Updates the motion status of the controller
     * @param callback: A CallbackStatus containing gyro and accelerometer data
     * @param index: motion ID of the to be updated
     */
    void SetMotion(Input::CallbackStatus callback, std::size_t index);

    /**
     * Updates the battery status of the controller
     * @param callback: A CallbackStatus containing the battery status
     * @param index: Button ID of the to be updated
     */
    void SetBattery(Input::CallbackStatus callback, std::size_t index);

    /**
     * Triggers a callback that something has changed on the controller status
     * @param Input type of the event to trigger
     */
    void TriggerOnChange(ControllerTriggerType type);

    NpadIdType npad_id_type;
    NpadType npad_type{NpadType::None};
    NpadType temporary_npad_type{NpadType::None};
    bool is_connected{false};
    bool temporary_is_connected{false};
    bool is_configuring{false};
    bool is_vibration_enabled{true};
    f32 motion_sensitivity{0.01f};

    ButtonParams button_params;
    StickParams stick_params;
    ControllerMotionParams motion_params;
    TriggerParams trigger_params;
    BatteryParams battery_params;
    OutputParams output_params;

    ButtonDevices button_devices;
    StickDevices stick_devices;
    ControllerMotionDevices motion_devices;
    TriggerDevices trigger_devices;
    BatteryDevices battery_devices;
    OutputDevices output_devices;

    mutable std::mutex mutex;
    std::unordered_map<int, ControllerUpdateCallback> callback_list;
    int last_callback_key = 0;

    // Stores the current status of all controller input
    ControllerStatus controller;
};

} // namespace Core::HID