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use crate::{bool_to_option, to_option_string};
use gloo::events::EventListener;
use wasm_bindgen::prelude::*;
use wasm_bindgen::JsCast;
use web_sys::{CustomEvent, Element};
use yew::prelude::*;

#[wasm_bindgen(module = "/build/mwc-slider.js")]
extern "C" {
    #[derive(Debug)]
    type Slider;

    // This needs to be added to each component
    #[wasm_bindgen(getter, static_method_of = Slider)]
    fn _dummy_loader() -> JsValue;
}

// call the macro with the type
loader_hack!(Slider);

/// The `mwc-snackbar` component
///
/// [MWC Documentation](https://github.com/material-components/material-components-web-components/tree/master/packages/slider)
pub struct MatSlider {
    props: SliderProps,
    node_ref: NodeRef,
    input_listener: Option<EventListener>,
    change_listener: Option<EventListener>,
}

/// Props for [`MatSlider`]
///
/// MWC Documentation:
///
/// - [Properties](https://github.com/material-components/material-components-web-components/tree/master/packages/slider#propertiesattributes)
/// - [Events](https://github.com/material-components/material-components-web-components/tree/master/packages/slider#events)
#[derive(Debug, Properties, Clone)]
pub struct SliderProps {
    #[prop_or(0)]
    pub value: u32,
    #[prop_or(0)]
    pub min: u32,
    #[prop_or(100)]
    pub max: u32,
    #[prop_or(0)]
    pub step: u32,
    #[prop_or(false)]
    pub pin: bool,
    #[prop_or(false)]
    pub markers: bool,
    /// Binds to input on `mwc-slider`
    /// Type passed to callback is `CustomEvent` because `Slider` is
    /// undocumented See: <https://github.com/material-components/material-components-web-components/issues/1848>
    #[prop_or_default]
    pub oninput: Callback<CustomEvent>,
    /// Binds to change on `mwc-slider`
    /// Type passed to callback is `CustomEvent` because `Slider` is
    /// undocumented See: <https://github.com/material-components/material-components-web-components/issues/1848>
    #[prop_or_default]
    pub onchange: Callback<CustomEvent>,
}

impl Component for MatSlider {
    type Message = ();
    type Properties = SliderProps;

    fn create(props: Self::Properties, _: ComponentLink<Self>) -> Self {
        Slider::ensure_loaded();
        Self {
            props,
            node_ref: NodeRef::default(),
            input_listener: None,
            change_listener: None,
        }
    }

    fn update(&mut self, _msg: Self::Message) -> ShouldRender {
        false
    }

    fn change(&mut self, props: Self::Properties) -> bool {
        self.props = props;
        true
    }

    fn view(&self) -> Html {
        html! {
            <mwc-slider
                value=to_option_string(self.props.value)
                min=to_option_string(self.props.min)
                max=to_option_string(self.props.max)
                step=to_option_string(self.props.step)
                pin=bool_to_option(self.props.pin)
                markers=bool_to_option(self.props.markers)
                ref=self.node_ref.clone()
            ></mwc-slider>
        }
    }

    fn rendered(&mut self, _first_render: bool) {
        let element = self.node_ref.cast::<Element>().unwrap();
        if self.input_listener.is_none() {
            let oninput = self.props.oninput.clone();
            self.input_listener = Some(EventListener::new(&element, "input", move |event| {
                oninput.emit(JsValue::from(event).unchecked_into::<CustomEvent>())
            }));
        };

        if self.change_listener.is_none() {
            let onchange = self.props.onchange.clone();
            self.change_listener = Some(EventListener::new(&element, "change", move |event| {
                onchange.emit(JsValue::from(event).unchecked_into::<CustomEvent>())
            }));
        }
    }
}