use crate::{
    controller::*,
    render::{Renderer, WinColorFmt, WinDepthFmt},
    settings::{ControlSettings, Settings},
    ui, Error,
};
use gilrs::{EventType, Gilrs};
use hashbrown::HashMap;

use crossbeam::channel;
use serde_derive::{Deserialize, Serialize};
use std::fmt;
use tracing::{error, info, warn};
use vek::*;

/// Represents a key that the game recognises after input mapping.
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Deserialize, Serialize)]
pub enum GameInput {
    Primary,
    Secondary,
    Slot1,
    Slot2,
    Slot3,
    Slot4,
    Slot5,
    Slot6,
    Slot7,
    Slot8,
    Slot9,
    Slot10,
    ToggleCursor,
    MoveForward,
    MoveBack,
    MoveLeft,
    MoveRight,
    Jump,
    Sit,
    Dance,
    Glide,
    Climb,
    ClimbDown,
    //WallLeap,
    ToggleLantern,
    Mount,
    Enter,
    Command,
    Escape,
    Map,
    Bag,
    Social,
    Spellbook,
    Settings,
    ToggleInterface,
    Help,
    ToggleDebug,
    Fullscreen,
    Screenshot,
    ToggleIngameUi,
    Roll,
    Respawn,
    Interact,
    ToggleWield,
    //Charge,
    SwapLoadout,
    FreeLook,
    AutoWalk,
}

impl GameInput {
    pub fn get_localization_key(&self) -> &str {
        match *self {
            GameInput::Primary => "gameinput.primary",
            GameInput::Secondary => "gameinput.secondary",
            GameInput::ToggleCursor => "gameinput.togglecursor",
            GameInput::MoveForward => "gameinput.moveforward",
            GameInput::MoveLeft => "gameinput.moveleft",
            GameInput::MoveRight => "gameinput.moveright",
            GameInput::MoveBack => "gameinput.moveback",
            GameInput::Jump => "gameinput.jump",
            GameInput::Sit => "gameinput.sit",
            GameInput::Dance => "gameinput.dance",
            GameInput::Glide => "gameinput.glide",
            GameInput::Climb => "gameinput.climb",
            GameInput::ClimbDown => "gameinput.climbdown",
            //GameInput::WallLeap => "gameinput.wallleap",
            GameInput::ToggleLantern => "gameinput.togglelantern",
            GameInput::Mount => "gameinput.mount",
            GameInput::Enter => "gameinput.enter",
            GameInput::Command => "gameinput.command",
            GameInput::Escape => "gameinput.escape",
            GameInput::Map => "gameinput.map",
            GameInput::Bag => "gameinput.bag",
            GameInput::Social => "gameinput.social",
            GameInput::Spellbook => "gameinput.spellbook",
            GameInput::Settings => "gameinput.settings",
            GameInput::ToggleInterface => "gameinput.toggleinterface",
            GameInput::Help => "gameinput.help",
            GameInput::ToggleDebug => "gameinput.toggledebug",
            GameInput::Fullscreen => "gameinput.fullscreen",
            GameInput::Screenshot => "gameinput.screenshot",
            GameInput::ToggleIngameUi => "gameinput.toggleingameui",
            GameInput::Roll => "gameinput.roll",
            GameInput::Respawn => "gameinput.respawn",
            GameInput::Interact => "gameinput.interact",
            GameInput::ToggleWield => "gameinput.togglewield",
            //GameInput::Charge => "gameinput.charge",
            GameInput::FreeLook => "gameinput.freelook",
            GameInput::AutoWalk => "gameinput.autowalk",
            GameInput::Slot1 => "gameinput.slot1",
            GameInput::Slot2 => "gameinput.slot2",
            GameInput::Slot3 => "gameinput.slot3",
            GameInput::Slot4 => "gameinput.slot4",
            GameInput::Slot5 => "gameinput.slot5",
            GameInput::Slot6 => "gameinput.slot6",
            GameInput::Slot7 => "gameinput.slot7",
            GameInput::Slot8 => "gameinput.slot8",
            GameInput::Slot9 => "gameinput.slot9",
            GameInput::Slot10 => "gameinput.slot10",
            GameInput::SwapLoadout => "gameinput.swaploadout",
        }
    }
}

/// Represents a key that the game menus recognise after input mapping
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Deserialize, Serialize)]
pub enum MenuInput {
    Up,
    Down,
    Left,
    Right,
    ScrollUp,
    ScrollDown,
    ScrollLeft,
    ScrollRight,
    Home,
    End,
    Apply,
    Back,
    Exit,
}

#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
pub enum AnalogMenuInput {
    MoveX(f32),
    MoveY(f32),
    ScrollX(f32),
    ScrollY(f32),
}

#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
pub enum AnalogGameInput {
    MovementX(f32),
    MovementY(f32),
    CameraX(f32),
    CameraY(f32),
}

/// Represents an incoming event from the window.
#[derive(Clone)]
pub enum Event {
    /// The window has been requested to close.
    Close,
    /// The window has been resized.
    Resize(Vec2<u32>),
    /// The window has been moved.
    Moved(Vec2<u32>),
    /// A key has been typed that corresponds to a specific character.
    Char(char),
    /// The cursor has been panned across the screen while grabbed.
    CursorPan(Vec2<f32>),
    /// The cursor has been moved across the screen while ungrabbed.
    CursorMove(Vec2<f32>),
    /// A mouse button has been pressed or released
    MouseButton(MouseButton, PressState),
    /// The camera has been requested to zoom.
    Zoom(f32),
    /// A key that the game recognises has been pressed or released.
    InputUpdate(GameInput, bool),
    /// Event that the ui uses.
    Ui(ui::Event),
    /// The view distance has changed.
    ViewDistanceChanged(u32),
    /// Game settings have changed.
    SettingsChanged,
    /// The window is (un)focused
    Focused(bool),
    /// A key that the game recognises for menu navigation has been pressed or
    /// released
    MenuInput(MenuInput, bool),
    /// Update of the analog inputs recognized by the menus
    AnalogMenuInput(AnalogMenuInput),
    /// Update of the analog inputs recognized by the game
    AnalogGameInput(AnalogGameInput),
    /// We tried to save a screenshot
    ScreenshotMessage(String),
}

pub type MouseButton = winit::MouseButton;
pub type PressState = winit::ElementState;

#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Deserialize, Serialize)]
pub enum KeyMouse {
    Key(glutin::VirtualKeyCode),
    Mouse(glutin::MouseButton),
}

impl fmt::Display for KeyMouse {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        use self::KeyMouse::*;
        use glutin::{MouseButton, VirtualKeyCode::*};
        write!(f, "{}", match self {
            Key(Key1) => "1",
            Key(Key2) => "2",
            Key(Key3) => "3",
            Key(Key4) => "4",
            Key(Key5) => "5",
            Key(Key6) => "6",
            Key(Key7) => "7",
            Key(Key8) => "8",
            Key(Key9) => "9",
            Key(Key0) => "0",
            Key(A) => "A",
            Key(B) => "B",
            Key(C) => "C",
            Key(D) => "D",
            Key(E) => "E",
            Key(F) => "F",
            Key(G) => "G",
            Key(H) => "H",
            Key(I) => "I",
            Key(J) => "J",
            Key(K) => "K",
            Key(L) => "L",
            Key(M) => "M",
            Key(N) => "N",
            Key(O) => "O",
            Key(P) => "P",
            Key(Q) => "Q",
            Key(R) => "R",
            Key(S) => "S",
            Key(T) => "T",
            Key(U) => "U",
            Key(V) => "V",
            Key(W) => "W",
            Key(X) => "X",
            Key(Y) => "Y",
            Key(Z) => "Z",
            Key(Escape) => "ESC",
            Key(F1) => "F1",
            Key(F2) => "F2",
            Key(F3) => "F3",
            Key(F4) => "F4",
            Key(F5) => "F5",
            Key(F6) => "F6",
            Key(F7) => "F7",
            Key(F8) => "F8",
            Key(F9) => "F9",
            Key(F10) => "F10",
            Key(F11) => "F11",
            Key(F12) => "F12",
            Key(F13) => "F13",
            Key(F14) => "F14",
            Key(F15) => "F15",
            Key(F16) => "F16",
            Key(F17) => "F17",
            Key(F18) => "F18",
            Key(F19) => "F19",
            Key(F20) => "F20",
            Key(F21) => "F21",
            Key(F22) => "F22",
            Key(F23) => "F23",
            Key(F24) => "F24",
            Key(Snapshot) => "Print Screen",
            Key(Scroll) => "Scroll Lock",
            Key(Pause) => "Pause/Break",
            Key(Insert) => "Insert",
            Key(Home) => "Home",
            Key(Delete) => "Delete",
            Key(End) => "End",
            Key(PageDown) => "PageDown",
            Key(PageUp) => "PageUp",
            Key(Left) => "Left Arrow",
            Key(Up) => "Up Arrow",
            Key(Right) => "Right Arrow",
            Key(Down) => "Down Arrow",
            Key(Back) => "Backspace",
            Key(Return) => "Enter",
            Key(Space) => "Space",
            Key(Compose) => "Compose",
            Key(Caret) => "^",
            Key(Numlock) => "Numlock",
            Key(Numpad0) => "Numpad 0",
            Key(Numpad1) => "Numpad 1",
            Key(Numpad2) => "Numpad 2",
            Key(Numpad3) => "Numpad 3",
            Key(Numpad4) => "Numpad 4",
            Key(Numpad5) => "Numpad 5",
            Key(Numpad6) => "Numpad 6",
            Key(Numpad7) => "Numpad 7",
            Key(Numpad8) => "Numpad 8",
            Key(Numpad9) => "Numpad 9",
            Key(AbntC1) => "Abnt C1",
            Key(AbntC2) => "Abnt C2",
            Key(Add) => "Numpad +",
            Key(Apostrophe) => "'",
            Key(Apps) => "Context Menu",
            Key(At) => "@",
            Key(Ax) => "Ax",
            Key(Backslash) => "\\",
            Key(Calculator) => "Calculator",
            Key(Capital) => "Caps Lock",
            Key(Colon) => ":",
            Key(Comma) => ",",
            Key(Convert) => "Convert",
            Key(Decimal) => "Numpad .",
            Key(Divide) => "Numpad /",
            Key(Equals) => "=",
            Key(Grave) => "`",
            Key(Kana) => "Kana",
            Key(Kanji) => "Kanji",
            Key(LAlt) => "LAlt",
            Key(LBracket) => "[",
            Key(LControl) => "LControl",
            Key(LShift) => "LShift",
            Key(LWin) => "LWin",
            Key(Mail) => "Mail",
            Key(MediaSelect) => "MediaSelect",
            Key(MediaStop) => "MediaStop",
            Key(Minus) => "-",
            Key(Multiply) => "Numpad *",
            Key(Mute) => "Mute",
            Key(MyComputer) => "My Computer",
            Key(NavigateForward) => "Navigate Forward",
            Key(NavigateBackward) => "Navigate Backward",
            Key(NextTrack) => "Next Track",
            Key(NoConvert) => "Non Convert",
            Key(NumpadComma) => "Num ,",
            Key(NumpadEnter) => "Num Enter",
            Key(NumpadEquals) => "Num =",
            Key(OEM102) => "<",
            Key(Period) => ".",
            Key(PlayPause) => "Play / Pause",
            Key(Power) => "Power",
            Key(PrevTrack) => "Prev Track",
            Key(RAlt) => "RAlt",
            Key(RBracket) => "]",
            Key(RControl) => "RControl",
            Key(RShift) => "RShift",
            Key(RWin) => "RWin",
            Key(Semicolon) => ";",
            Key(Slash) => "/",
            Key(Sleep) => "Sleep",
            Key(Stop) => "Media Stop",
            Key(Subtract) => "Num -",
            Key(Sysrq) => "Sysrq",
            Key(Tab) => "Tab",
            Key(Underline) => "_",
            Key(Unlabeled) => "No Name",
            Key(VolumeDown) => "Volume Down",
            Key(VolumeUp) => "Volume Up",
            Key(Wake) => "Wake",
            Key(WebBack) => "Browser Back",
            Key(WebFavorites) => "Browser Favorites",
            Key(WebForward) => "Browser Forward",
            Key(WebHome) => "Browser Home",
            Key(WebRefresh) => "Browser Refresh",
            Key(WebSearch) => "Browser Search",
            Key(WebStop) => "Browser Stop",
            Key(Yen) => "Yen",
            Key(Copy) => "Copy",
            Key(Paste) => "Paste",
            Key(Cut) => "Cut",
            Mouse(MouseButton::Left) => "M1",
            Mouse(MouseButton::Right) => "M2",
            Mouse(MouseButton::Middle) => "M3",
            Mouse(MouseButton::Other(button)) =>
            // Additional mouse buttons after middle click start at 1
                return write!(f, "M{}", button + 3),
        })
    }
}

pub struct Window {
    events_loop: glutin::EventsLoop,
    renderer: Renderer,
    window: glutin::ContextWrapper<glutin::PossiblyCurrent, winit::Window>,
    cursor_grabbed: bool,
    pub pan_sensitivity: u32,
    pub zoom_sensitivity: u32,
    pub zoom_inversion: bool,
    pub mouse_y_inversion: bool,
    fullscreen: bool,
    needs_refresh_resize: bool,
    keypress_map: HashMap<GameInput, glutin::ElementState>,
    pub remapping_keybindings: Option<GameInput>,
    supplement_events: Vec<Event>,
    focused: bool,
    gilrs: Option<Gilrs>,
    controller_settings: ControllerSettings,
    cursor_position: winit::dpi::LogicalPosition,
    mouse_emulation_vec: Vec2<f32>,
    // Currently used to send and receive screenshot result messages
    message_sender: channel::Sender<String>,
    message_receiver: channel::Receiver<String>,
}

impl Window {
    pub fn new(settings: &Settings) -> Result<Window, Error> {
        let events_loop = glutin::EventsLoop::new();

        let size = settings.graphics.window_size;

        let win_builder = glutin::WindowBuilder::new()
            .with_title("Veloren")
            .with_dimensions(glutin::dpi::LogicalSize::new(
                size[0] as f64,
                size[1] as f64,
            ))
            .with_maximized(true);

        let ctx_builder = glutin::ContextBuilder::new()
            .with_gl(glutin::GlRequest::Specific(glutin::Api::OpenGl, (3, 2)))
            .with_vsync(false);

        let (window, device, factory, win_color_view, win_depth_view) =
            gfx_window_glutin::init::<WinColorFmt, WinDepthFmt>(
                win_builder,
                ctx_builder,
                &events_loop,
            )
            .map_err(|err| Error::BackendError(Box::new(err)))?;

        let vendor = device.get_info().platform_name.vendor;
        let renderer = device.get_info().platform_name.renderer;
        let opengl_version = device.get_info().version;
        let glsl_version = device.get_info().shading_language;
        info!(
            ?vendor,
            ?renderer,
            ?opengl_version,
            ?glsl_version,
            "selected graphics device"
        );

        let keypress_map = HashMap::new();

        let gilrs = match Gilrs::new() {
            Ok(gilrs) => Some(gilrs),
            Err(gilrs::Error::NotImplemented(_dummy)) => {
                warn!("Controller input is unsupported on this platform.");
                None
            },
            Err(gilrs::Error::InvalidAxisToBtn) => {
                error!(
                    "Invalid AxisToBtn controller mapping. Falling back to no controller support."
                );
                None
            },
            Err(gilrs::Error::Other(e)) => {
                error!(
                    ?e,
                    "Platform-specific error when creating a Gilrs instance. Falling back to no \
                     controller support."
                );
                None
            },
        };

        let controller_settings = ControllerSettings::from(&settings.controller);

        let (message_sender, message_receiver): (
            channel::Sender<String>,
            channel::Receiver<String>,
        ) = channel::unbounded::<String>();

        let mut this = Self {
            events_loop,
            renderer: Renderer::new(
                device,
                factory,
                win_color_view,
                win_depth_view,
                settings.graphics.aa_mode,
                settings.graphics.cloud_mode,
                settings.graphics.fluid_mode,
            )?,
            window,
            cursor_grabbed: false,
            pan_sensitivity: settings.gameplay.pan_sensitivity,
            zoom_sensitivity: settings.gameplay.zoom_sensitivity,
            zoom_inversion: settings.gameplay.zoom_inversion,
            mouse_y_inversion: settings.gameplay.mouse_y_inversion,
            fullscreen: false,
            needs_refresh_resize: false,
            keypress_map,
            remapping_keybindings: None,
            supplement_events: vec![],
            focused: true,
            gilrs,
            controller_settings,
            cursor_position: winit::dpi::LogicalPosition::new(0.0, 0.0),
            mouse_emulation_vec: Vec2::zero(),
            // Currently used to send and receive screenshot result messages
            message_sender,
            message_receiver,
        };

        this.fullscreen(settings.graphics.fullscreen);

        Ok(this)
    }

    pub fn renderer(&self) -> &Renderer { &self.renderer }

    pub fn renderer_mut(&mut self) -> &mut Renderer { &mut self.renderer }

    #[allow(clippy::match_bool)] // TODO: Pending review in #587
    pub fn fetch_events(&mut self, settings: &mut Settings) -> Vec<Event> {
        let mut events = vec![];
        events.append(&mut self.supplement_events);
        // Refresh ui size (used when changing playstates)
        if self.needs_refresh_resize {
            events.push(Event::Ui(ui::Event::new_resize(self.logical_size())));
            self.needs_refresh_resize = false;
        }

        // Receive any messages sent through the message channel
        self.message_receiver
            .try_iter()
            .for_each(|message| events.push(Event::ScreenshotMessage(message)));

        // Copy data that is needed by the events closure to avoid lifetime errors.
        // TODO: Remove this if/when the compiler permits it.
        let cursor_grabbed = self.cursor_grabbed;
        let renderer = &mut self.renderer;
        let window = &mut self.window;
        let remapping_keybindings = &mut self.remapping_keybindings;
        let focused = &mut self.focused;
        let controls = &mut settings.controls;
        let keypress_map = &mut self.keypress_map;
        let pan_sensitivity = self.pan_sensitivity;
        let zoom_sensitivity = self.zoom_sensitivity;
        let zoom_inversion = match self.zoom_inversion {
            true => -1.0,
            false => 1.0,
        };
        let mouse_y_inversion = match self.mouse_y_inversion {
            true => -1.0,
            false => 1.0,
        };
        let mut toggle_fullscreen = false;
        let mut take_screenshot = false;
        let mut cursor_position = None;

        self.events_loop.poll_events(|event| {
            // Get events for ui.
            if let Some(event) = ui::Event::try_from(event.clone(), window) {
                events.push(Event::Ui(event));
            }

            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => events.push(Event::Close),
                    glutin::WindowEvent::Resized(glutin::dpi::LogicalSize { width, height }) => {
                        let (mut color_view, mut depth_view) = renderer.win_views_mut();
                        gfx_window_glutin::update_views(window, &mut color_view, &mut depth_view);
                        renderer.on_resize().unwrap();
                        events.push(Event::Resize(Vec2::new(width as u32, height as u32)));
                    },
                    glutin::WindowEvent::Moved(glutin::dpi::LogicalPosition { x, y }) => {
                        events.push(Event::Moved(Vec2::new(x as u32, y as u32)))
                    },
                    glutin::WindowEvent::ReceivedCharacter(c) => events.push(Event::Char(c)),
                    glutin::WindowEvent::MouseInput { button, state, .. } => {
                        if let (true, Some(game_inputs)) = (
                            cursor_grabbed,
                            Window::map_input(
                                KeyMouse::Mouse(button),
                                controls,
                                remapping_keybindings,
                            ),
                        ) {
                            for game_input in game_inputs {
                                events.push(Event::InputUpdate(
                                    *game_input,
                                    state == glutin::ElementState::Pressed,
                                ));
                            }
                        }
                        events.push(Event::MouseButton(button, state));
                    },
                    glutin::WindowEvent::KeyboardInput { input, .. } => {
                        if let Some(key) = input.virtual_keycode {
                            if let Some(game_inputs) = Window::map_input(
                                KeyMouse::Key(key),
                                controls,
                                remapping_keybindings,
                            ) {
                                for game_input in game_inputs {
                                    match game_input {
                                        GameInput::Fullscreen => {
                                            if input.state == glutin::ElementState::Pressed
                                                && !Self::is_pressed(
                                                    keypress_map,
                                                    GameInput::Fullscreen,
                                                )
                                            {
                                                toggle_fullscreen = !toggle_fullscreen;
                                            }
                                            Self::set_pressed(
                                                keypress_map,
                                                GameInput::Fullscreen,
                                                input.state,
                                            );
                                        },
                                        GameInput::Screenshot => {
                                            take_screenshot = input.state
                                                == glutin::ElementState::Pressed
                                                && !Self::is_pressed(
                                                    keypress_map,
                                                    GameInput::Screenshot,
                                                );
                                            Self::set_pressed(
                                                keypress_map,
                                                GameInput::Screenshot,
                                                input.state,
                                            );
                                        },
                                        _ => events.push(Event::InputUpdate(
                                            *game_input,
                                            input.state == glutin::ElementState::Pressed,
                                        )),
                                    }
                                }
                            }
                        }
                    },

                    glutin::WindowEvent::Focused(state) => {
                        *focused = state;
                        events.push(Event::Focused(state));
                    },
                    glutin::WindowEvent::CursorMoved { position, .. } => {
                        cursor_position = Some(position);
                    },
                    _ => {},
                },
                glutin::Event::DeviceEvent { event, .. } => match event {
                    glutin::DeviceEvent::MouseMotion {
                        delta: (dx, dy), ..
                    } if *focused => {
                        let delta = Vec2::new(
                            dx as f32 * (pan_sensitivity as f32 / 100.0),
                            dy as f32 * (pan_sensitivity as f32 * mouse_y_inversion / 100.0),
                        );

                        if cursor_grabbed {
                            events.push(Event::CursorPan(delta));
                        } else {
                            events.push(Event::CursorMove(delta));
                        }
                    },
                    glutin::DeviceEvent::MouseWheel { delta, .. } if cursor_grabbed && *focused => {
                        events.push(Event::Zoom({
                            // Since scrolling apparently acts different depending on platform
                            #[cfg(target_os = "windows")]
                            const PLATFORM_FACTOR: f32 = -4.0;
                            #[cfg(not(target_os = "windows"))]
                            const PLATFORM_FACTOR: f32 = 1.0;

                            let y = match delta {
                                glutin::MouseScrollDelta::LineDelta(_x, y) => y,
                                // TODO: Check to see if there is a better way to find the "line
                                // height" than just hardcoding 16.0 pixels.  Alternately we could
                                // get rid of this and have the user set zoom sensitivity, since
                                // it's unlikely people would expect a configuration file to work
                                // across operating systems.
                                glutin::MouseScrollDelta::PixelDelta(pos) => (pos.y / 16.0) as f32,
                            };
                            y * (zoom_sensitivity as f32 / 100.0) * zoom_inversion * PLATFORM_FACTOR
                        }))
                    },
                    _ => {},
                },
                _ => {},
            }
        });

        if let Some(pos) = cursor_position {
            self.cursor_position = pos;
        }

        if take_screenshot {
            self.take_screenshot(&settings);
        }

        if toggle_fullscreen {
            self.toggle_fullscreen(settings);
        }

        if let Some(gilrs) = &mut self.gilrs {
            while let Some(event) = gilrs.next_event() {
                fn handle_buttons(
                    settings: &ControllerSettings,
                    events: &mut Vec<Event>,
                    button: &Button,
                    is_pressed: bool,
                ) {
                    if let Some(evs) = settings.game_button_map.get(button) {
                        for ev in evs {
                            events.push(Event::InputUpdate(*ev, is_pressed));
                        }
                    }
                    if let Some(evs) = settings.menu_button_map.get(button) {
                        for ev in evs {
                            events.push(Event::MenuInput(*ev, is_pressed));
                        }
                    }
                }

                match event.event {
                    EventType::ButtonPressed(button, code)
                    | EventType::ButtonRepeated(button, code) => {
                        handle_buttons(
                            &self.controller_settings,
                            &mut events,
                            &Button::from((button, code)),
                            true,
                        );
                    },
                    EventType::ButtonReleased(button, code) => {
                        handle_buttons(
                            &self.controller_settings,
                            &mut events,
                            &Button::from((button, code)),
                            false,
                        );
                    },
                    EventType::ButtonChanged(button, _value, code) => {
                        if let Some(actions) = self
                            .controller_settings
                            .game_analog_button_map
                            .get(&AnalogButton::from((button, code)))
                        {
                            for action in actions {
                                match *action {}
                            }
                        }
                        if let Some(actions) = self
                            .controller_settings
                            .menu_analog_button_map
                            .get(&AnalogButton::from((button, code)))
                        {
                            for action in actions {
                                match *action {}
                            }
                        }
                    },

                    EventType::AxisChanged(axis, value, code) => {
                        let value = match self
                            .controller_settings
                            .inverted_axes
                            .contains(&Axis::from((axis, code)))
                        {
                            true => value * -1.0,
                            false => value,
                        };

                        let value = self
                            .controller_settings
                            .apply_axis_deadzone(&Axis::from((axis, code)), value);

                        if self.cursor_grabbed {
                            if let Some(actions) = self
                                .controller_settings
                                .game_axis_map
                                .get(&Axis::from((axis, code)))
                            {
                                for action in actions {
                                    match *action {
                                        AxisGameAction::MovementX => {
                                            events.push(Event::AnalogGameInput(
                                                AnalogGameInput::MovementX(value),
                                            ));
                                        },
                                        AxisGameAction::MovementY => {
                                            events.push(Event::AnalogGameInput(
                                                AnalogGameInput::MovementY(value),
                                            ));
                                        },
                                        AxisGameAction::CameraX => {
                                            events.push(Event::AnalogGameInput(
                                                AnalogGameInput::CameraX(
                                                    value
                                                        * self.controller_settings.pan_sensitivity
                                                            as f32
                                                        / 100.0,
                                                ),
                                            ));
                                        },
                                        AxisGameAction::CameraY => {
                                            events.push(Event::AnalogGameInput(
                                                AnalogGameInput::CameraY(
                                                    value
                                                        * self.controller_settings.pan_sensitivity
                                                            as f32
                                                        / 100.0,
                                                ),
                                            ));
                                        },
                                    }
                                }
                            }
                        } else if let Some(actions) = self
                            .controller_settings
                            .menu_axis_map
                            .get(&Axis::from((axis, code)))
                        {
                            // TODO: possibly add sensitivity settings when this is used
                            for action in actions {
                                match *action {
                                    AxisMenuAction::MoveX => {
                                        events.push(Event::AnalogMenuInput(
                                            AnalogMenuInput::MoveX(value),
                                        ));
                                    },
                                    AxisMenuAction::MoveY => {
                                        events.push(Event::AnalogMenuInput(
                                            AnalogMenuInput::MoveY(value),
                                        ));
                                    },
                                    AxisMenuAction::ScrollX => {
                                        events.push(Event::AnalogMenuInput(
                                            AnalogMenuInput::ScrollX(value),
                                        ));
                                    },
                                    AxisMenuAction::ScrollY => {
                                        events.push(Event::AnalogMenuInput(
                                            AnalogMenuInput::ScrollY(value),
                                        ));
                                    },
                                }
                            }
                        }
                    },
                    EventType::Connected => {},
                    EventType::Disconnected => {},
                    EventType::Dropped => {},
                }
            }
        }

        // Mouse emulation for the menus, to be removed when a proper menu navigation
        // system is available
        if !self.cursor_grabbed {
            events = events
                .into_iter()
                .filter_map(|event| match event {
                    Event::AnalogMenuInput(input) => match input {
                        AnalogMenuInput::MoveX(d) => {
                            self.mouse_emulation_vec.x = d;
                            None
                        },
                        AnalogMenuInput::MoveY(d) => {
                            // This just has to be inverted for some reason
                            self.mouse_emulation_vec.y = d * -1.0;
                            None
                        },
                        _ => {
                            let event = Event::AnalogMenuInput(input);
                            Some(event)
                        },
                    },
                    Event::MenuInput(input, state) => match input {
                        MenuInput::Apply => Some(match state {
                            true => Event::Ui(ui::Event(conrod_core::event::Input::Press(
                                conrod_core::input::Button::Mouse(
                                    conrod_core::input::state::mouse::Button::Left,
                                ),
                            ))),
                            false => Event::Ui(ui::Event(conrod_core::event::Input::Release(
                                conrod_core::input::Button::Mouse(
                                    conrod_core::input::state::mouse::Button::Left,
                                ),
                            ))),
                        }),
                        _ => Some(event),
                    },
                    _ => Some(event),
                })
                .collect();
            let sensitivity = self.controller_settings.mouse_emulation_sensitivity;
            if self.mouse_emulation_vec != Vec2::zero() {
                self.offset_cursor(self.mouse_emulation_vec * sensitivity as f32)
                    .unwrap_or(());
            }
        }
        events
    }

    /// Moves cursor by an offset
    pub fn offset_cursor(&self, d: Vec2<f32>) -> Result<(), String> {
        self.window
            .window()
            .set_cursor_position(winit::dpi::LogicalPosition::new(
                d.x as f64 + self.cursor_position.x,
                d.y as f64 + self.cursor_position.y,
            ))
    }

    pub fn swap_buffers(&self) -> Result<(), Error> {
        self.window
            .swap_buffers()
            .map_err(|err| Error::BackendError(Box::new(err)))
    }

    pub fn is_cursor_grabbed(&self) -> bool { self.cursor_grabbed }

    pub fn grab_cursor(&mut self, grab: bool) {
        self.cursor_grabbed = grab;
        self.window.window().hide_cursor(grab);
        let _ = self.window.window().grab_cursor(grab);
    }

    pub fn toggle_fullscreen(&mut self, settings: &mut Settings) {
        self.fullscreen(!self.is_fullscreen());
        settings.graphics.fullscreen = self.is_fullscreen();
        settings.save_to_file_warn();
    }

    pub fn is_fullscreen(&self) -> bool { self.fullscreen }

    pub fn fullscreen(&mut self, fullscreen: bool) {
        let window = self.window.window();
        self.fullscreen = fullscreen;
        if fullscreen {
            window.set_fullscreen(Some(window.get_current_monitor()));
        } else {
            window.set_fullscreen(None);
        }
    }

    pub fn needs_refresh_resize(&mut self) { self.needs_refresh_resize = true; }

    #[allow(clippy::or_fun_call)] // TODO: Pending review in #587
    pub fn logical_size(&self) -> Vec2<f64> {
        let (w, h) = self
            .window
            .window()
            .get_inner_size()
            .unwrap_or(glutin::dpi::LogicalSize::new(0.0, 0.0))
            .into();
        Vec2::new(w, h)
    }

    pub fn set_size(&mut self, new_size: Vec2<u16>) {
        self.window
            .window()
            .set_inner_size(glutin::dpi::LogicalSize::new(
                new_size.x as f64,
                new_size.y as f64,
            ));
    }

    pub fn send_supplement_event(&mut self, event: Event) { self.supplement_events.push(event) }

    pub fn take_screenshot(&mut self, settings: &Settings) {
        match self.renderer.create_screenshot() {
            Ok(img) => {
                let mut path = settings.screenshots_path.clone();
                let sender = self.message_sender.clone();

                std::thread::spawn(move || {
                    use std::time::SystemTime;
                    // Check if folder exists and create it if it does not
                    if !path.exists() {
                        if let Err(e) = std::fs::create_dir_all(&path) {
                            warn!(?e, "Couldn't create folder for screenshot");
                            let _result =
                                sender.send(String::from("Couldn't create folder for screenshot"));
                        }
                    }
                    path.push(format!(
                        "screenshot_{}.png",
                        SystemTime::now()
                            .duration_since(SystemTime::UNIX_EPOCH)
                            .map(|d| d.as_millis())
                            .unwrap_or(0)
                    ));
                    if let Err(e) = img.save(&path) {
                        warn!(?e, "Couldn't save screenshot");
                        let _result = sender.send(String::from("Couldn't save screenshot"));
                    } else {
                        let _result =
                            sender.send(format!("Screenshot saved to {}", path.to_string_lossy()));
                    }
                });
            },
            Err(e) => error!(?e, "Couldn't create screenshot due to renderer error"),
        }
    }

    fn is_pressed(map: &mut HashMap<GameInput, glutin::ElementState>, input: GameInput) -> bool {
        *(map.entry(input).or_insert(glutin::ElementState::Released))
            == glutin::ElementState::Pressed
    }

    fn set_pressed(
        map: &mut HashMap<GameInput, glutin::ElementState>,
        input: GameInput,
        state: glutin::ElementState,
    ) {
        map.insert(input, state);
    }

    // Function used to handle Mouse and Key events. It first checks if we're in
    // remapping mode for a specific GameInput. If we are, we modify the binding
    // of that GameInput with the KeyMouse passed. Else, we return an iterator of
    // the GameInputs for that KeyMouse.
    fn map_input<'a>(
        key_mouse: KeyMouse,
        controls: &'a mut ControlSettings,
        remapping: &mut Option<GameInput>,
    ) -> Option<impl Iterator<Item = &'a GameInput>> {
        match *remapping {
            Some(game_input) => {
                controls.modify_binding(game_input, key_mouse);
                *remapping = None;
                None
            },
            None => {
                if let Some(game_inputs) = controls.get_associated_game_inputs(&key_mouse) {
                    Some(game_inputs.iter())
                } else {
                    None
                }
            },
        }
    }

    pub fn set_keybinding_mode(&mut self, game_input: GameInput) {
        self.remapping_keybindings = Some(game_input);
    }
}