use yew::prelude::*;
use yewtil::NeqAssign;
use crate::viewmodel::Error;
use crate::view::WeakComponentLink;
use crate::viewmodel::dates::*;
use crate::viewmodel::VCardPropertyInputObject;
use super::VCardPropertyInputComponent;

pub struct DatesView {
    props: Props,
    value: Dates,
    error: Option<Error>,
}

pub enum Msg {
    UpdateAnniversary(String),
    UpdateBirthday(String),

    Generate,
}

#[derive(Clone, PartialEq, Properties)]
pub struct Props {
    pub generated: Callback<Dates>,
    pub weak_link: WeakComponentLink<DatesView>,
}

impl VCardPropertyInputComponent<Dates> for DatesView {
    fn get_input_object(&self) -> Dates {
        self.value.clone()
    }
    fn get_title(&self) -> std::string::String {
        "Dates".to_string()
    }
    fn get_error(&self) -> std::option::Option<Error> {
        self.error.clone()
    }
}

impl Component for DatesView {
    type Message = Msg;
    type Properties = Props;
    fn create(props: <Self as yew::Component>::Properties, link: yew::html::Scope<Self>) -> Self {
        props.weak_link.borrow_mut().replace(link);
        Self {
            props,
            value: Dates::new(),
            error: None,
        }
    }
    fn update(&mut self, msg: <Self as yew::Component>::Message) -> bool {
        match msg {
            Msg::UpdateAnniversary(a) => self.value.anniversary = a,
            Msg::UpdateBirthday(b) => self.value.birthday = b,
            Msg::Generate => {
                self.props.generated.emit(self.value.clone());
            },
        };
        true
    }
    fn change(&mut self, props: <Self as yew::Component>::Properties) -> bool {
        self.props.neq_assign(props)
    }
    fn view(&self) -> yew::virtual_dom::VNode {
        let link = self.props.weak_link.borrow().clone().unwrap();

        html!{
            <div class="box">
                { self.render_error() }

                <h3 class="subtitle">{ self.get_title() }</h3>

                { self.get_input_object().render(&link) }

            </div>
        }
    }
}