use yew::services::ConsoleService;
use yew::prelude::*;
use yewtil::NeqAssign;
use yewtil::ptr::Irc;
use yewtil::ptr::Mrc;
use super::WeakComponentLink;
use crate::viewmodel::address::*;
use crate::viewmodel::VCardPropertyInputObject;
use super::VCardPropertyInputComponent;
use crate::viewmodel::Error;

/// View Component for a `address` field
/// 
/// # Examples
/// 
/// ```compile_fail
/// let html = html!{
///     <AddressView    weak_link=some_weak_component_link 
///                     generated=self.link.callback(
///                         |n: Irc<Address>| 
///                         Msg::GeneratedAddress(some_address)
///                     )
///     />
/// };
/// ```
pub struct AddressView {
    props: Props,
    value: Mrc<Address>,
    error: Option<Error>,
}

pub enum Msg {
    UpdatePostOfficeBox(String),
    UpdateExtension(String),
    UpdateStreet(String),
    UpdateLocality(String),
    UpdateRegion(String),
    UpdateCode(String),
    UpdateCountry(String),
    ToggleWork,
    ToggleHome,

    Generate,
}

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

impl VCardPropertyInputComponent<Address> for AddressView {
    fn get_input_object(&self) -> Address {
        match self.value.irc().try_unwrap() {
            Ok(address) => address,
            Err(_) => {
                ConsoleService::error("Couldn't unwrap address");
                Address::new()
            },
        }
    }
    fn get_title(&self) -> String {
        "Address".to_string()
    }
    fn get_error(&self) -> Option<Error> {
        self.error.clone()
    }
}

impl Component for AddressView {
    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: Mrc::new(Address::new()),
            error: None,
        }
    }
    fn update(&mut self, msg: <Self as yew::Component>::Message) -> bool {
        match msg {
            Msg::UpdatePostOfficeBox(b) => self.value.post_office_box = b,
            Msg::UpdateExtension(e) => self.value.extension = e,
            Msg::UpdateStreet(s) => self.value.street = s,
            Msg::UpdateLocality(l) => self.value.locality = l,
            Msg::UpdateRegion(r) => self.value.region = r,
            Msg::UpdateCode(p) => self.value.code = p,
            Msg::UpdateCountry(c) => self.value.country = c,
            Msg::ToggleWork => self.value.work = !self.value.work,
            Msg::ToggleHome => self.value.home = !self.value.home,
            Msg::Generate => {
                self.props.generated.emit(self.value.irc());
            },
        };
        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>
        }
    }
}