lan-party-backend/web/src/components/event.rs

use std::{cell::RefCell, marker::PhantomData, str::FromStr};

use crate::components::Block;
use lan_party_core::event::{
    free_for_all_game::FreeForAllGameSpec, team_game::TeamGameSpec, test::TestSpec, EventSpec,
    EventTypeSpec,
};
use log::debug;
use paste::paste;
use sycamore::{builder::prelude::*, component::Prop, prelude::*};

macro_rules! editable {
    ($type:ty => $editor:ty) => {
        impl<'s: 'a, 'a, G: Html> Editable<'s, 'a, G> for $type {
            type Editor = $editor;
        }
    };
}

macro_rules! edit_fields {
    ($cx:ident, $(($name:expr, $prop:expr)),* $(,)?) => {
        view! { $cx,
            $(
            p {
                label { ($name) }
                ($prop.edit($cx))
            }
            )*
        }
    };
}

macro_rules! link_fields {
    ($cx:ident, $($field:ident),* $(,)? => $state:ident as $t:ident) => {
        $(let $field = create_signal($cx, $state.get_untracked().$field.clone());)*

        create_effect($cx, || {
            $state.set($t {
                $($field: $field.get().as_ref().clone(),)*
                ..Default::default()
            });
        });
    };
}

macro_rules! edit_struct {
    ($struct:ident => $(($name:expr, $prop:ident)),* $(,)?) => {
        paste! {
            pub struct [<$struct Edit>];

            impl<'s: 'a, 'a, G: Html> Editor<'s, 'a, G, $struct> for [<$struct Edit>] {
                fn edit(cx: Scope<'a>, props: EditProps<'a, $struct>) -> View<G> {
                    let state = props.state;
                    link_fields!(cx, $($prop,)* => state as $struct);
                    view! { cx,
                        Block(title=stringify!($struct).into()) {
                            (edit_fields!(cx, $(($name, $prop),)*))
                        }
                    }
                }
            }

            editable!($struct => [<$struct Edit>]);
        }
    };
}

macro_rules! link_variants {
    ($cx:ident, $selected:ident => $($index:literal: $var_name:ident = $variant:ident: $var_type:ty),* $(,)? => $state:ident as $t:ident) => {
        let $selected = create_signal($cx, String::from("0"));

        $(let $var_name = if let $t::$variant(v) = $state.get_untracked().as_ref().clone() {
            create_signal($cx, v.clone())
        } else {
            create_signal($cx, <$var_type>::default())
        };)*

        create_effect($cx, || {
            debug!("{:#?}", $selected.get());
            match $selected.get().as_str() {
                $(stringify!($index) => $state.set($t::$variant($var_name.get().as_ref().clone())),)*
                _ => unreachable!()
            }
        });
    };
}

macro_rules! edit_enum {
    ($enum:ident => $selected:ident => $($index:literal: $var_name:ident = $variant:ident: $var_type:ty),* $(,)?) => {
        paste! {
            pub struct [<$enum Edit>];

            impl<'s: 'a, 'a, G: Html> Editor<'s, 'a, G, $enum> for [<$enum Edit>] {
                fn edit(cx: Scope<'a>, props: EditProps<'a, $enum>) -> View<G> {
                    let state = props.state;

                    link_variants!(cx, $selected =>
                        $($index: $var_name = $variant: $var_type,)*
                        => state as $enum
                    );

                    view! { cx,
                        Block(title=stringify!($enum).to_string()) {
                            select(bind:value=$selected) {
                                $(option(value={stringify!($index)}, selected=$index==0) { (stringify!($variant)) })*
                            }
                            (match $selected.get().as_str() {
                                $(stringify!($index) => $var_name.edit(cx),)*
                                _ => unreachable!()
                            })
                        }
                    }
                }
            }

            editable!($enum => [<$enum Edit>]);
        }
    };
}

#[derive(Prop)]
pub struct EditProps<'a, T> {
    pub state: &'a Signal<T>,
}

impl<'a, T> From<&'a Signal<T>> for EditProps<'a, T> {
    fn from(state: &'a Signal<T>) -> Self {
        EditProps { state }
    }
}

pub trait IntoEdit<'s: 'a, 'a, G: Html> {
    fn edit(self, cx: BoundedScope<'a, 's>) -> View<G>;
}

impl<'s: 'a, 'a, G: Html, T: Editable<'s, 'a, G> + 'a> IntoEdit<'s, 'a, G> for &'a Signal<T>
where
    EditProps<'a, T>: From<&'a Signal<T>>,
{
    fn edit(self, cx: BoundedScope<'a, 's>) -> View<G> {
        T::edit(cx, self.into())
    }
}

pub trait Edit<'s: 'a, 'a, G: Html>: Sized {
    fn edit(cx: BoundedScope<'a, 's>, props: EditProps<'a, Self>) -> View<G>;
}

impl<'s: 'a, 'a, G, E, Type> Edit<'s, 'a, G> for Type
where
    G: Html,
    E: Editor<'s, 'a, G, Type>,
    Type: Editable<'s, 'a, G, Editor = E> + 'a,
{
    fn edit(cx: BoundedScope<'a, 's>, props: EditProps<'a, Self>) -> View<G> {
        E::edit(cx, props)
    }
}

pub trait Editor<'s: 'a, 'a, G: Html, Type: 'a>: Sized {
    fn edit(cx: BoundedScope<'a, 's>, props: EditProps<'a, Type>) -> View<G>;
}

pub trait Editable<'s: 'a, 'a, G: Html>: Sized + 'a {
    type Editor: Editor<'s, 'a, G, Self>;
}

edit_struct!(EventSpec => ("Name", name), ("Description", description), ("Event type", event_type));

edit_enum!(EventTypeSpec => selected =>
    0: test = Test: TestSpec,
    1: team_game = TeamGame: TeamGameSpec,
    2: free_for_all_game = FreeForAllGame: FreeForAllGameSpec
);

edit_struct!(TestSpec => ("Number of players", num_players));
edit_struct!(TeamGameSpec => ("Win rewards", win_rewards));
edit_struct!(FreeForAllGameSpec => );

pub struct StringEdit;

impl<'s: 'a, 'a, G: Html> Editor<'s, 'a, G, String> for StringEdit {
    fn edit(cx: Scope<'a>, props: EditProps<'a, String>) -> View<G> {
        view! { cx,
            input(bind:value=props.state)
        }
    }
}

editable!(String => StringEdit);

pub struct StubEdit;

impl<'s: 'a, 'a, G: Html, T> Editor<'s, 'a, G, T> for StubEdit
where
    T: Editable<'s, 'a, G, Editor = StubEdit>,
{
    fn edit(cx: Scope<'a>, _props: EditProps<'a, T>) -> View<G> {
        view! { cx,
            i { "Editor Unimplemented" }
        }
    }
}

pub struct InputEdit;

impl<'s: 'a, 'a, G: Html, T> Editor<'s, 'a, G, T> for InputEdit
where
    T: Editable<'s, 'a, G, Editor = InputEdit> + FromStr + ToString + Default,
{
    fn edit(cx: Scope<'a>, props: EditProps<'a, T>) -> View<G> {
        let value = create_signal(cx, props.state.get_untracked().to_string());

        create_effect(cx, || {
            props
                .state
                .set((*value.get()).parse().unwrap_or(T::default()))
        });

        view! { cx,
            input(bind:value=value)
        }
    }
}

editable!(i64 => InputEdit);
editable!(i32 => InputEdit);
editable!(isize => InputEdit);

editable!(u64 => InputEdit);
editable!(u32 => InputEdit);
editable!(usize => InputEdit);

editable!(f64 => InputEdit);
editable!(f32 => InputEdit);

pub struct BoolEdit;

impl<'s: 'a, 'a, G: Html> Editor<'s, 'a, G, bool> for BoolEdit {
    fn edit(cx: Scope<'a>, props: EditProps<'a, bool>) -> View<G> {
        view! { cx,
            input(type="checkbox", bind:checked=props.state)
        }
    }
}

editable!(bool => BoolEdit);

pub struct VecEdit;

impl<'s: 'a, 'a, G, T, I> Editor<'s, 'a, G, I> for VecEdit
where
    G: Html,
    T: Editable<'s, 'a, G> + Clone + PartialEq + 'a,
    I: IntoIterator<Item = T> + FromIterator<T> + Clone + 'a,
{
    fn edit(cx: BoundedScope<'a, 's>, props: EditProps<'a, I>) -> View<G> {
        let vec: &'a Signal<Vec<&'a Signal<T>>> = create_signal(
            cx,
            props
                .state
                .get_untracked()
                .as_ref()
                .clone()
                .into_iter()
                .map(|x| create_signal(cx, x))
                .collect::<Vec<_>>(),
        );
        //let signal = create_signal(cx, 0);
        //let vec2 = vec.get().as_ref().clone();
        //let signal = create_ref(cx, vec.get(0).unwrap());

        create_effect(cx, || {
            props.state.set(
                vec.get()
                    .iter()
                    .cloned()
                    .map(|x| x.get().as_ref().clone())
                    .collect(),
            )
        });

        let test = Indexed(
            cx,
            IndexedProps::builder()
                .iterable(vec)
                .view(|cx: BoundedScope<'_, '_>, x: &'a Signal<T>| {
                    //view! { cx, (T::edit(cx, EditProps { state: x })) }
                    T::edit(cx, EditProps { state: x })
                })
                .build(),
        );
        test

        /*
        //view! { cx, "Vec" }
        view! { cx,
            Indexed(
                iterable=vec,
                view=|cx: BoundedScope<'_, 'a>, x: &'a Signal<T>| {
                    view! { cx,
                        //(T::edit(cx, EditProps { state: x }))
                        (something_with_signal(cx, EditProps { state: x }))
                    }
                },
            )
        }
        */

        /*
        view! { cx,
            (View::new_fragment((vec.get().try_borrow().unwrap().clone().into_iter().map(|s: &'a Signal<T>| {
                view! { cx, (T::edit(cx, s.into())) }
            })).collect()))
        }
        */
    }
}

/*
#[component]
pub fn VecTest<
    'a,
    G: Html,
    T: 'a + PartialEq + Clone + Editable<'a, G, Editor = E>,
    E: Editor<'a, G, T>,
>(
    cx: Scope<'a>,
    props: EditProps<'a, Vec<T>>,
) -> View<G> {
    /*
    let signals: &'a Signal<Vec<&'a Signal<String>>> = create_signal(
        cx,
        vec![
            create_signal(cx, String::new()),
            create_signal(cx, String::new()),
        ],
    );
    */

    let signals = create_signal(
        cx,
        props
            .state
            .get()
            .iter()
            .cloned()
            .map(|s| create_signal(cx, s))
            .collect::<Vec<_>>(),
    );

    view! { cx,
        Indexed(
            iterable=signals,
            view=|cx: BoundedScope<'_, 'a>, signal: &'a Signal<T>| {
                view! { cx,
                    //(something_with_signal(cx, SignalWrapper(signal)))
                    //(E::edit(cx, EditProps { state: signal }))
                    //(T::edit(cx, EditProps { state: signal }))
                    //(signal.edit(cx))
                }
            },
        )
    }
}
*/

pub struct SignalWrapper<'a, T>(&'a Signal<T>);

#[component]
pub fn something_with_signal<'a, G: Html, T: 'a>(
    cx: Scope<'a>,
    signal: EditProps<'a, T>,
) -> View<G> {
    drop(signal);
    view! { cx, "Something" }
}

impl<'s: 'a, 'a, G, T> Editable<'s, 'a, G> for Vec<T>
where
    G: Html,
    T: Editable<'s, 'a, G> + Clone + PartialEq + 'a,
{
    type Editor = VecEdit;
}

#[derive(Default, Clone, Debug)]
pub struct Test {
    inner: TestInner,
    inner2: TestInner,
}

edit_struct!(Test => ("Inner", inner), ("Inner 2", inner2));

#[derive(Default, Clone, Debug)]
pub struct TestInner {
    some_text: String,
    some_number: usize,
}

edit_struct!(TestInner => ("Text", some_text), ("Number", some_number));