const std = @import("std");
const grome = @import("../root.zig");
const style = grome.view.style;

const Point = grome.container.Point;
const Block = grome.container.Block;
const SubMatrix = grome.container.SubMatrix;
const Widget = grome.view.Widget;
const WidgetError = grome.view.WidgetError;
const Cell = grome.view.Cell;
const Style = grome.view.style.Style;

pub const Nucleus = struct {
    location: Point,
    style_loop_ctr: usize,
    widget: Widget,

    const healthy_loop = [_]Style{
        style.rgb(95, 133, 99),
        style.rgb(95, 129, 78),
        style.rgb(94, 121, 66),
        style.rgb(93, 115, 45),
        style.rgb(93, 110, 34),
        style.rgb(93, 115, 45),
        style.rgb(94, 121, 66),
        style.rgb(95, 129, 78),
        style.rgb(95, 133, 99),
    };

    pub fn init(loc: Point) Nucleus {
        return .{
            .location = loc,
            .style_loop_ctr = 0,
            .widget = .{
                .geometryFn = Nucleus.geometry,
                .renderFn = Nucleus.render,
            },
        };
    }

    pub fn geometry(widget: *Widget) Block {
        const self: *@This() = @fieldParentPtr("widget", widget);

        return Block{
            .loc = self.location,
            .size = .{ .height = 1, .width = 1 },
        };
    }

    pub fn render(widget: *Widget, frame: *SubMatrix(Cell)) WidgetError!void {
        const self: *@This() = @fieldParentPtr("widget", widget);
        frame.set(
            .{ .x = 0, .y = 0 },
            .{
                .char = ("Ω" ** 4).*,
                .width = 2,
                .style = healthy_loop[(self.style_loop_ctr / 5) % healthy_loop.len],
            },
        ) catch return WidgetError.UnknownError;
        self.style_loop_ctr += 1;
    }
};