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

const Io = std.Io;
const Rect = grome.matrix.Rect;
const DoubleBuffer = grome.draw.DoubleBuffer;
const Duration = Io.Duration;
const Clock = Io.Clock;

pub fn main(init: std.process.Init) !void {
    // This is appropriate for anything that lives as long as the process.
    const arena: std.mem.Allocator = init.arena.allocator();

    // Initialize the stdout writer
    var stdout_buffer: [1024]u8 = undefined;
    var stdout_file_writer: Io.File.Writer = .init(.stdout(), init.io, &stdout_buffer);

    // alright lets play with the matrix
    const size = Rect{ .height = 20, .width = 50 };
    var double_buf = try DoubleBuffer.init(arena, size);

    const density = size.area() / 100;
    while (true) {
        var frame = double_buf.frame(.{ .x = 0, .y = 0 }, size);
        for (0..density) |_| {
            var buf: [3]u8 = undefined;
            init.io.random(&buf);
            try frame.set(.{ .x = @intCast(buf[0] % size.width), .y = @intCast(buf[1] % size.height) }, .{ .char = [_]u8{@intCast((buf[2] % 50) + 93)} ** 8, .width = 1 });
        }

        _ = try double_buf.render(&stdout_file_writer.interface);
        try init.io.sleep(Duration.fromMilliseconds(100), Clock.real);
    }
}