use crate::{mount_style, teleport::Teleport, utils::maybe_rw_signal::MaybeRwSignal};
use leptos::*;
use wasm_bindgen::__rt::IntoJsResult;

#[component]
pub fn ColorPicker(#[prop(optional, into)] value: MaybeRwSignal<String>) -> impl IntoView {
    mount_style("color-picker", include_str!("./color-picker.css"));
    let label = create_rw_signal(String::new());
    let style = create_memo(move |_| {
        let mut style = String::new();

        value.with(|value| {
            if value.is_empty() {
                label.set("Invalid value".into());
                return;
            }

            style.push_str(&format!("background-color: {value}"));
            label.set(value.clone());
        });

        style
    });

    let is_show_popover = create_rw_signal(false);
    let trigger_ref = create_node_ref::<html::Div>();
    let popover_ref = create_node_ref::<html::Div>();
    let show_popover = move |_| {
        let rect = trigger_ref.get().unwrap().get_bounding_client_rect();
        is_show_popover.set(true);
        if let Some(popover_ref) = popover_ref.get() {
            popover_ref.style(
                "transform",
                format!(
                    "translateX({}px) translateY({}px)",
                    rect.x(),
                    rect.y() + rect.height()
                ),
            );
        }
    };
    let timer = window_event_listener(ev::click, move |ev| {
        let el = ev.target();
        let mut el: Option<web_sys::Element> =
            el.into_js_result().map_or(None, |el| Some(el.into()));
        let body = document().body().unwrap();
        while let Some(current_el) = el {
            if current_el == *body {
                break;
            };
            if current_el == ***popover_ref.get().unwrap()
                || current_el == ***trigger_ref.get().unwrap()
            {
                return;
            }
            el = current_el.parent_element();
        }
        is_show_popover.set(false);
    });
    on_cleanup(move || timer.remove());
    view! {
        <div class="melt-color-picker-trigger" on:click=show_popover ref=trigger_ref>
            <div class="melt-color-picker-trigger__content" style=move || style.get()>
                {move || label.get()}
            </div>
        </div>
        <Teleport>
            <div
                class="melt-color-picker-popover"
                ref=popover_ref
                style=move || {
                    if !is_show_popover.get() { format!("display: none").into() } else { None }
                }
            >

                <div class="melt-color-picker-popover__layer"></div>
                <div></div>
            </div>
        </Teleport>
    }
}