package fog

import (
	"io"
	"os"
)

// To allows setting the logging destination writer, defaults to `os.Stdout` if
// not provided
func To(dest io.Writer) Option {
	return func(o *options) {
		o.dest = dest
	}
}

// WithLevel sets the verbosity level for the created logger. Passing any negative
// value will disable non-Error() logs by setting Zap's log level to Error (2).
func WithLevel(lvl int) Option {
	return func(o *options) {
		if lvl < 0 {
			lvl = 2
		}
		o.lvl = int8(toZapLevel(lvl))
	}
}

// private options struct, can only be changed by consumers via the public
// Option function interface
type options struct {
	dest        io.Writer
	lvl         int8
	development bool
}

func makeOptions(opts ...Option) options {
	o := options{dest: os.Stdout, development: false}
	for _, opt := range opts {
		opt(&o)
	}

	return o
}

// setDevelopment sets the boolean to true so that Zap's development mode can be used
func setDevelopment() Option {
	return func(o *options) {
		o.development = true
	}
}