const std = @import("std");
const Writer = std.Io.Writer;

pub const Console = struct {
    setup: *const fn (*const @This()) void,
    write: *const fn (*const @This(), []const u8) void,
};

fn nop_setup(_: *const Console) void {}
fn nop_write(_: *const Console, _: []const u8) void {}

const nop_console = Console{
    .setup = nop_setup,
    .write = nop_write,
};

var cur: *const Console = &nop_console;

fn drain(
    _: *Writer,
    data: []const []const u8,
    _: usize,
) Writer.Error!usize {
    cur.write(cur, data[0]);
    return data[0].len;
}

var writer: Writer = .{
    .vtable = &.{ .drain = drain },
    .buffer = &.{},
};

pub fn print(comptime fmt: []const u8, args: anytype) void {
    writer.print(fmt, args) catch {};
}

pub fn set_console(console: *const Console) void {
    console.setup(console);
    cur = console;
}