/*
 * OrbTK - The Orbital Widget Toolkit
 *
 * Copyright 2021 Ralf Zerres <ralf.zerres@networkx.de>
 * SPDX-License-Identifier: (0BSD or MIT)
 */

use orbtk::prelude::*;

use crate::sender::sender_state::{SenderAction, SenderState};

/// Enumeration of valid `action variants` that need to be handled as
/// state changes for the `SenderView` widget.
pub enum TestMessageAction {
    // Toggle visibility of a message TextBox.
    ToggleMessageBox
}

/// Valid `structure members` of the `ReceiverState` used to react on
/// state changes inside the `ReceiverView` widget.
#[derive(Default, AsAny)]
pub struct ReceiverState {
    message_box: Option<Entity>,
    progress_bar: Entity
}

/// Method definitions, we provide inside the `ReceiverState`.
impl ReceiverState {
    fn toggle_message_box(&self, ctx: &mut Context) {
        if let Some(message_box) = self.message_box {
            ctx.get_widget(message_box)
                .set("visibility", Visibility::Visible);
        }
    }
}

/// Trait methods provided for the `SenderState`
impl State for ReceiverState {
    // initialize the view entities
    fn init(&mut self, _: &mut Registry, ctx: &mut Context) {
        self.progress_bar = ctx.entity_of_child("progress_bar")
            .expect("Cannot find ProgressBar!");
    }

    // handle messages targeting the view
    fn messages(
        &mut self,
        mut messages: MessageReader,
        _registry: &mut Registry,
        ctx: &mut Context
    ) {
        for message in messages.read::<SenderAction>() {
            match message {
                SenderAction::UpdateProgress(amount) => {
                    println!("Message received");
                    let mut progress_bar = ctx.get_widget(self.progress_bar);
                    let current_progress = progress_bar.clone::<f64>("val");
                    progress_bar.set::<f64>("val", current_progress + amount);
                }
            }
        }
        for action in messages.read::<TestMessageAction>() {
            match action {
                TestMessageAction::ToggleMessageBox => {
                    self.toggle_message_box(ctx);
                }
            }
        }
    }
}