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

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

pub enum Msg {
    UpdatePrefix(String),
    UpdateFirstName(String),
    UpdateMiddleName(String),
    UpdateLastName(String),
    UpdateSuffix(String),

    Generate,
}

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

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

impl Component for NameView {
    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(Name::new()),
            error: None,
        }
    }
    fn update(&mut self, msg: <Self as yew::Component>::Message) -> bool {
        match msg {
            Msg::UpdatePrefix(p) => self.value.prefix = p,
            Msg::UpdateFirstName(f) => self.value.first_name = f,
            Msg::UpdateMiddleName(m) => self.value.middle_name = m,
            Msg::UpdateLastName(l) => self.value.last_name = l,
            Msg::UpdateSuffix(s) => self.value.suffix = s,
            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>
        }
    }
}