pub const Config = union(enum) {
    no_color,
    escape_codes,
    windows_api: if (native_os == .windows) WindowsContext else void,

    pub const WindowsContext = struct {
        handle: File.Handle,
        reset_attributes: u16,
    };

    pub fn setColor(
        conf: Config,
        writer: anytype,
        color: Color,
    ) (@typeInfo(@TypeOf(writer.writeAll(""))).error_union.error_set ||
        windows.SetConsoleTextAttributeError)!void {
        nosuspend switch (conf) {
            .no_color => return,
            .escape_codes => {
                const color_string = switch (color) {
                    .black => "\x1b[30m",
                    .red => "\x1b[31m",
                    .green => "\x1b[32m",
                    .yellow => "\x1b[33m",
                    .blue => "\x1b[34m",
                    .magenta => "\x1b[35m",
                    .cyan => "\x1b[36m",
                    .white => "\x1b[37m",
                    .bright_black => "\x1b[90m",
                    .bright_red => "\x1b[91m",
                    .bright_green => "\x1b[92m",
                    .bright_yellow => "\x1b[93m",
                    .bright_blue => "\x1b[94m",
                    .bright_magenta => "\x1b[95m",
                    .bright_cyan => "\x1b[96m",
                    .bright_white => "\x1b[97m",
                    .bold => "\x1b[1m",
                    .dim => "\x1b[2m",
                    .reset => "\x1b[0m",
                };
                try writer.writeAll(color_string);
            },
            .windows_api => |ctx| if (native_os == .windows) {
                const attributes = switch (color) {
                    .black => 0,
                    .red => windows.FOREGROUND_RED,
                    .green => windows.FOREGROUND_GREEN,
                    .yellow => windows.FOREGROUND_RED | windows.FOREGROUND_GREEN,
                    .blue => windows.FOREGROUND_BLUE,
                    .magenta => windows.FOREGROUND_RED | windows.FOREGROUND_BLUE,
                    .cyan => windows.FOREGROUND_GREEN | windows.FOREGROUND_BLUE,
                    .white => windows.FOREGROUND_RED | windows.FOREGROUND_GREEN | windows.FOREGROUND_BLUE,
                    .bright_black => windows.FOREGROUND_INTENSITY,
                    .bright_red => windows.FOREGROUND_RED | windows.FOREGROUND_INTENSITY,
                    .bright_green => windows.FOREGROUND_GREEN | windows.FOREGROUND_INTENSITY,
                    .bright_yellow => windows.FOREGROUND_RED | windows.FOREGROUND_GREEN | windows.FOREGROUND_INTENSITY,
                    .bright_blue => windows.FOREGROUND_BLUE | windows.FOREGROUND_INTENSITY,
                    .bright_magenta => windows.FOREGROUND_RED | windows.FOREGROUND_BLUE | windows.FOREGROUND_INTENSITY,
                    .bright_cyan => windows.FOREGROUND_GREEN | windows.FOREGROUND_BLUE | windows.FOREGROUND_INTENSITY,
                    .bright_white, .bold => windows.FOREGROUND_RED | windows.FOREGROUND_GREEN | windows.FOREGROUND_BLUE | windows.FOREGROUND_INTENSITY,
                    // "dim" is not supported using basic character attributes, but let's still make it do *something*.
                    // This matches the old behavior of TTY.Color before the bright variants were added.
                    .dim => windows.FOREGROUND_INTENSITY,
                    .reset => ctx.reset_attributes,
                };
                try windows.SetConsoleTextAttribute(ctx.handle, attributes);
            } else {
                unreachable;
            },
        };
    }
}