use kahlo::math::PixelSideOffsets;
use patina::{
    layout::SizePolicy,
    prelude::*,
    ui::{UIControlMsg, UIHandle},
    widget,
};

struct FormWindow {
    root: widget::Frame<Self>,
}

impl FormWindow {
    fn new(uih: &mut UIHandle) -> Self {
        let mut group = widget::FormGroup::new(uih);
        group.layout_node_mut().set_height_policy(SizePolicy::fixed(0));
        group.set_label_margin(PixelSideOffsets::new(0, 10, 0, 10));
        group.add_widget("button", widget::Button::new_with_label(uih, "engage").boxed());
        group.add_widget("button 2", widget::Button::new_with_label(uih, "engage").boxed());
        group.add_widget("button 3", widget::Button::new_with_label(uih, "engage").boxed());
        group.add_widget("button 4 with longer description", widget::Button::new_with_label(uih, "engage").boxed());
        Self { root: widget::Frame::wrap_widget(group) }
    }
}

impl Component for FormWindow {
    type ParentMsg = UIControlMsg;
    type Msg = ();

    fn process(&mut self, _msg: Self::Msg) -> Vec<Self::ParentMsg> {
        let mut out = String::new();
        patina::layout::dump_node_tree(self.root.layout_node(), &mut out);
        std::fs::write("patina-form-example.layout_tree", out)
            .expect("couldn't dump node tree");
        vec![UIControlMsg::Terminate]
    }
}

impl WindowComponent for FormWindow {
    fn map_window_event(&self, we: patina::window::WindowEvent) -> Option<Self::Msg> {
        match we {
            patina::window::WindowEvent::CloseRequested => Some(()),
            _ => None,
        }
    }

    type RootWidget = widget::Frame<Self>;
    fn root_widget(&self) -> &Self::RootWidget {
        &self.root
    }
    fn root_widget_mut(&mut self) -> &mut Self::RootWidget {
        &mut self.root
    }
}

fn main() {
    patina::ui::make_opinionated_ui(FormWindow::new).run();
}