const std = @import("std");
const c = @import("c");
const engine = @import("engine");
const Control = engine.Control;

pub const camera = true;
pub const mouse = true;

// later make this expandable in some way using an allocator.

pub const Display = struct {
	var debug_buffer: [10][200]u8 = undefined;

	pub fn reset() void {
		inline for (0..debug_buffer.len) |idx| {
			debug_buffer[idx][0] = 0;
		}
	}

	fn empty_line() !usize {
		for (0..debug_buffer.len) |idx| {
			if (debug_buffer[idx][0] == 0) {
				return idx;
			}
		}
		return error.DebugBufferOverflow;
	}

	pub fn add_line(comptime fmt: []const u8, args: anytype) void {
		const line_idx: usize = empty_line()
			catch @panic("debug buffer overflow (too many lines)");
		_ = std.fmt.bufPrintZ(&debug_buffer[line_idx], fmt, args)
			catch @panic("debug buffer overflow (line too long)");
	}

	pub fn render(renderer: *c.SDL_Renderer) void {
		_ = c.SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
		const x = 10;
		var y: f32 = 10;
		const line_height = 10;
		inline for (0..debug_buffer.len) |idx| {
			_ = c.SDL_RenderDebugText(renderer, x, y, &debug_buffer[idx]);
			y = y + line_height;
		}
	}
};