.{string, fmt, memory} := @use("stn")

LogMsg := packed struct {level: LogLevel, string: ^u8, strlen: uint}

LogLevel := enum {
	Error,
	Warn,
	Info,
	Debug,
	Trace,
}

$log := fn(level: LogLevel, message: []u8): void {
	return @eca(3, 1, LogMsg.(level, message.ptr, message.len), @sizeof(LogMsg))
}

$error := fn(message: []u8): void return log(LogLevel.Error, message)
$warn := fn(message: []u8): void return log(LogLevel.Warn, message)
$info := fn(message: []u8): void return log(LogLevel.Info, message)
$debug := fn(message: []u8): void return log(LogLevel.Debug, message)
$trace := fn(message: []u8): void return log(LogLevel.Trace, message)

print_buffer := memory.dangling(u8)

print := fn(v: @Any(), opts: fmt.FormatOptions): void {
	if print_buffer == memory.dangling(u8) {
		print_buffer = memory.request_page(1)
	}
	len := @inline(fmt.format, v, print_buffer[0..memory.PAGE_SIZE], opts)
	@eca(3, 1, LogMsg.(opts.log, print_buffer, len), @sizeof(LogMsg))
	memory.set(u8, &0, print_buffer, len)
}

printf := fn(str: []u8, v: @Any(), opts: fmt.FormatOptions): void {
	if print_buffer == memory.dangling(u8) {
		print_buffer = memory.request_page(1)
	}
	len := @inline(fmt.format_with_str, v, str, print_buffer[0..memory.PAGE_SIZE], opts)
	@eca(3, 1, LogMsg.(opts.log, print_buffer, len), @sizeof(LogMsg))
	print(len, .{})
	memory.set(u8, &0, print_buffer, len)
}