use skia_safe::{self as skia, Color4f};
use std::collections::HashMap;

use super::{RenderState, ShapesPool, SurfaceId};
use crate::math::Matrix;
use crate::render::grid_layout;
use crate::shapes::StructureEntry;
use crate::uuid::Uuid;

pub fn render(
    render_state: &mut RenderState,
    shapes: &ShapesPool,
    modifiers: &HashMap<Uuid, Matrix>,
    structure: &HashMap<Uuid, Vec<StructureEntry>>,
) {
    let canvas = render_state.surfaces.canvas(SurfaceId::UI);

    canvas.clear(Color4f::new(0.0, 0.0, 0.0, 0.0));
    canvas.save();

    let viewbox = render_state.viewbox;
    let zoom = viewbox.zoom * render_state.options.dpr();

    canvas.scale((zoom, zoom));

    canvas.translate((-viewbox.area.left, -viewbox.area.top));

    let canvas = render_state.surfaces.canvas(SurfaceId::UI);

    if let Some(id) = render_state.show_grid {
        if let Some(shape) = shapes.get(&id) {
            grid_layout::render_overlay(zoom, canvas, shape, shapes, modifiers, structure);
        }
    }

    canvas.restore();
    render_state.surfaces.draw_into(
        SurfaceId::UI,
        SurfaceId::Target,
        Some(&skia::Paint::default()),
    );
}