use egui::{Color32, Stroke, Ui, accesskit::ListStyle::Circle, epaint::CircleShape};

use crate::{
    Config, Diagnostics, Input,
    camera::Camera,
    sim::materials::{MATERIALS, MaterialId},
};

pub fn draw_egui<'a>(
    ui: &mut Ui,
    config: &mut Config,
    camera: &mut Camera,
    diagnostics: &Diagnostics,
    input: &Input,
) {
    ui.heading("Config");
    ui.add(egui::Slider::new(&mut config.brush_radius, 1..=100).text("Brush radius"));

    let material = MATERIALS[config.brush_material as usize];

    // material combobox
    egui::ComboBox::from_label("Select a material")
        .selected_text(format!(
            "Material: [{}, d={}]",
            material.name, material.density,
        ))
        .icon(move |ui, rect, _, _| {
            ui.painter().add(egui::Shape::Circle(
                (CircleShape {
                    center: rect.center(),
                    radius: rect.width() / 2.5,
                    stroke: Stroke::NONE,
                    fill: Color32::from_rgb(material.r, material.g, material.b),
                }),
            ));
        })
        .show_ui(ui, |ui| {
            ui.selectable_value(&mut config.brush_material, MaterialId::Void, "Void");
            ui.selectable_value(&mut config.brush_material, MaterialId::Sand, "Sand");
            ui.selectable_value(&mut config.brush_material, MaterialId::Water, "Water");
        });

    ui.add(egui::Slider::new(&mut config.fps, 1..=1000).text("Max FPS"));
    ui.checkbox(&mut config.show_ticks, "Visualize ticks");
    ui.label(format!("Real FPS: {}", diagnostics.fps));
    ui.heading("Camera");
    ui.add(egui::Slider::new(&mut camera.zoom, 0.0..=10.0).text("Zoom"));
    ui.add(egui::Slider::new(&mut camera.x, -1000.0..=1000.0).text("X"));
    ui.add(egui::Slider::new(&mut camera.y, -1000.0..=1000.0).text("Y"));
    ui.heading("Input");

    input.last_mouse_pos_on_screen.map(|p| {
        ui.label(format!(
            "Mouse: x,y=({x}, {y}), lmb_pressed={lmb}",
            x = p.0,
            y = p.1,
            lmb = input.is_lmb_pressed
        ))
    });

    input
        .last_mouse_pos_on_board
        .map(|p| ui.label(format!("Mouse (board): x,y=({x}, {y})", x = p.0, y = p.1,)));
}