// Crisp: a distortion plugin but not quite
// Copyright (C) 2022 Robbert van der Helm
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

use nih_plug::prelude::Editor;
use nih_plug_vizia::vizia::*;
use nih_plug_vizia::widgets::*;
use nih_plug_vizia::{assets, create_vizia_editor, ViziaState};
use std::sync::Arc;

use crate::CrispParams;

/// VIZIA uses points instead of pixels for text
const POINT_SCALE: f32 = 0.75;

#[derive(Lens)]
struct Data {
    params: Arc<CrispParams>,
}

impl Model for Data {}

// Makes sense to also define this here, makes it a bit easier to keep track of
pub(crate) fn default_state() -> Arc<ViziaState> {
    ViziaState::from_size(400, 390)
}

pub(crate) fn create(
    params: Arc<CrispParams>,
    editor_state: Arc<ViziaState>,
) -> Option<Box<dyn Editor>> {
    create_vizia_editor(editor_state, move |cx, _| {
        Data {
            params: params.clone(),
        }
        .build(cx);

        ResizeHandle::new(cx);

        VStack::new(cx, |cx| {
            Label::new(cx, "Crisp")
                .font(assets::NOTO_SANS_THIN)
                .font_size(40.0 * POINT_SCALE)
                .height(Pixels(50.0))
                .child_top(Stretch(1.0))
                .child_bottom(Pixels(0.0))
                // Make this more or less align with the parameters column
                .right(Pixels(67.0));

            ScrollView::new(cx, 0.0, 0.0, false, true, |cx| {
                // This looks better if it's flush at the top, and then we'll just add some padding
                // at the top of the scroll view
                GenericUi::new(cx, Data::params).child_top(Pixels(0.0));
            })
            .width(Percentage(100.0))
            .top(Pixels(5.0));
        })
        .row_between(Pixels(0.0))
        .child_left(Stretch(1.0))
        .child_right(Stretch(1.0));
    })
}