use crate::utils::prelude::*;
pub use smithay::{
    backend::input::KeyState,
    desktop::{LayerSurface, PopupKind, Window},
    input::{
        keyboard::{KeyboardTarget, KeysymHandle, ModifiersState},
        pointer::{AxisFrame, ButtonEvent, MotionEvent, PointerTarget},
        Seat,
    },
    reexports::wayland_server::{backend::ObjectId, protocol::wl_surface::WlSurface, Resource},
    utils::{IsAlive, Serial},
    wayland::seat::WaylandFocus,
};

#[derive(Debug, Clone, PartialEq)]
pub enum FocusTarget {
    Window(Window),
    LayerSurface(LayerSurface),
    Popup(PopupKind),
}

impl IsAlive for FocusTarget {
    fn alive(&self) -> bool {
        match self {
            FocusTarget::Window(w) => w.alive(),
            FocusTarget::LayerSurface(l) => l.alive(),
            FocusTarget::Popup(p) => p.alive(),
        }
    }
}

impl PointerTarget<State> for FocusTarget {
    fn enter(&self, seat: &Seat<State>, data: &mut State, event: &MotionEvent) {
        match self {
            FocusTarget::Window(w) => {
                PointerTarget::enter(w.toplevel().wl_surface(), seat, data, event)
            }
            FocusTarget::LayerSurface(l) => PointerTarget::enter(l.wl_surface(), seat, data, event),
            FocusTarget::Popup(p) => PointerTarget::enter(p.wl_surface(), seat, data, event),
        }
    }
    fn motion(&self, seat: &Seat<State>, data: &mut State, event: &MotionEvent) {
        match self {
            FocusTarget::Window(w) => {
                PointerTarget::motion(w.toplevel().wl_surface(), seat, data, event)
            }
            FocusTarget::LayerSurface(l) => {
                PointerTarget::motion(l.wl_surface(), seat, data, event)
            }
            FocusTarget::Popup(p) => PointerTarget::motion(p.wl_surface(), seat, data, event),
        }
    }
    fn button(&self, seat: &Seat<State>, data: &mut State, event: &ButtonEvent) {
        match self {
            FocusTarget::Window(w) => {
                PointerTarget::button(w.toplevel().wl_surface(), seat, data, event)
            }
            FocusTarget::LayerSurface(l) => {
                PointerTarget::button(l.wl_surface(), seat, data, event)
            }
            FocusTarget::Popup(p) => PointerTarget::button(p.wl_surface(), seat, data, event),
        }
    }
    fn axis(&self, seat: &Seat<State>, data: &mut State, frame: AxisFrame) {
        match self {
            FocusTarget::Window(w) => {
                PointerTarget::axis(w.toplevel().wl_surface(), seat, data, frame)
            }
            FocusTarget::LayerSurface(l) => PointerTarget::axis(l.wl_surface(), seat, data, frame),
            FocusTarget::Popup(p) => PointerTarget::axis(p.wl_surface(), seat, data, frame),
        }
    }
    fn leave(&self, seat: &Seat<State>, data: &mut State, serial: Serial, time: u32) {
        match self {
            FocusTarget::Window(w) => {
                PointerTarget::leave(w.toplevel().wl_surface(), seat, data, serial, time)
            }
            FocusTarget::LayerSurface(l) => {
                PointerTarget::leave(l.wl_surface(), seat, data, serial, time)
            }
            FocusTarget::Popup(p) => PointerTarget::leave(p.wl_surface(), seat, data, serial, time),
        }
    }
}

impl KeyboardTarget<State> for FocusTarget {
    fn enter(
        &self,
        seat: &Seat<State>,
        data: &mut State,
        keys: Vec<KeysymHandle<'_>>,
        serial: Serial,
    ) {
        match self {
            FocusTarget::Window(w) => {
                KeyboardTarget::enter(w.toplevel().wl_surface(), seat, data, keys, serial)
            }
            FocusTarget::LayerSurface(l) => {
                KeyboardTarget::enter(l.wl_surface(), seat, data, keys, serial)
            }
            FocusTarget::Popup(p) => {
                KeyboardTarget::enter(p.wl_surface(), seat, data, keys, serial)
            }
        }
    }
    fn leave(&self, seat: &Seat<State>, data: &mut State, serial: Serial) {
        match self {
            FocusTarget::Window(w) => {
                KeyboardTarget::leave(w.toplevel().wl_surface(), seat, data, serial)
            }
            FocusTarget::LayerSurface(l) => {
                KeyboardTarget::leave(l.wl_surface(), seat, data, serial)
            }
            FocusTarget::Popup(p) => KeyboardTarget::leave(p.wl_surface(), seat, data, serial),
        }
    }
    fn key(
        &self,
        seat: &Seat<State>,
        data: &mut State,
        key: KeysymHandle<'_>,
        state: KeyState,
        serial: Serial,
        time: u32,
    ) {
        match self {
            FocusTarget::Window(w) => KeyboardTarget::key(
                w.toplevel().wl_surface(),
                seat,
                data,
                key,
                state,
                serial,
                time,
            ),
            FocusTarget::LayerSurface(l) => {
                KeyboardTarget::key(l.wl_surface(), seat, data, key, state, serial, time)
            }
            FocusTarget::Popup(p) => {
                KeyboardTarget::key(p.wl_surface(), seat, data, key, state, serial, time)
            }
        }
    }
    fn modifiers(
        &self,
        seat: &Seat<State>,
        data: &mut State,
        modifiers: ModifiersState,
        serial: Serial,
    ) {
        match self {
            FocusTarget::Window(w) => {
                KeyboardTarget::modifiers(w.toplevel().wl_surface(), seat, data, modifiers, serial)
            }
            FocusTarget::LayerSurface(l) => {
                KeyboardTarget::modifiers(l.wl_surface(), seat, data, modifiers, serial)
            }
            FocusTarget::Popup(p) => {
                KeyboardTarget::modifiers(p.wl_surface(), seat, data, modifiers, serial)
            }
        }
    }
}

impl WaylandFocus for FocusTarget {
    fn wl_surface(&self) -> Option<&WlSurface> {
        Some(match self {
            FocusTarget::Window(w) => w.toplevel().wl_surface(),
            FocusTarget::LayerSurface(l) => l.wl_surface(),
            FocusTarget::Popup(p) => p.wl_surface(),
        })
    }
    fn same_client_as(&self, object_id: &ObjectId) -> bool {
        match self {
            FocusTarget::Window(w) => w.toplevel().wl_surface().id().same_client_as(object_id),
            FocusTarget::LayerSurface(l) => l.wl_surface().id().same_client_as(object_id),
            FocusTarget::Popup(p) => p.wl_surface().id().same_client_as(object_id),
        }
    }
}

impl From<Window> for FocusTarget {
    fn from(w: Window) -> Self {
        FocusTarget::Window(w)
    }
}

impl From<LayerSurface> for FocusTarget {
    fn from(l: LayerSurface) -> Self {
        FocusTarget::LayerSurface(l)
    }
}

impl From<PopupKind> for FocusTarget {
    fn from(p: PopupKind) -> Self {
        FocusTarget::Popup(p)
    }
}