package configuration

import (
	"os"
	"strings"

	"github.com/pkg/errors"
	"gopkg.in/yaml.v3"
)

// Configuration holds a list of process names to be tracked and a listen address.
type Configuration struct {
	ListenOn string `yaml:"listen_on"`
	HashSalt string `yaml:"hash_salt"`
	User     string `yaml:"user"`
	Chroot   string `yaml:"chroot"`
	Log      struct {
		ToStdout   bool   `yaml:"stdout"`
		Error      string `yaml:"error"`
		Upload     string `yaml:"upload"`
		Download   string `yaml:"download"`
		Clean      string `yaml:"clean"`
		CleanError string `yaml:"clean_error"`
	} `yaml:"log"`
	Uploads struct {
		Directory string `yaml:"directory"`
		Limits    struct {
			FileSize     int64 `yaml:"file_size"`
			KeepForHours int   `yaml:"keep_for_hours"`
			Storage      int64 `yaml:"storage"`
		} `yaml:"limits"`
	} `yaml:"uploads"`
}

func LoadConfiguration(path string) (*Configuration, error) {
	configFile, err := os.Open(path)
	if err != nil {
		return nil, errors.Wrap(err, "failed to open configuration file")
	}
	defer configFile.Close()

	config := &Configuration{}

	if err := yaml.NewDecoder(configFile).Decode(config); err != nil {
		return nil, errors.Wrap(err, "failed to parse configuration file")
	}

	return config, nil
}

// SplitNetworkAddress splits ListenOn option and returns as two strings
// network type (e.g. tcp, unix, udp) and address:port or /path/to/prog.socket
// to listen on.
func (c *Configuration) SplitNetworkAddress() (string, string) {
	s := strings.Split(c.ListenOn, " ")
	return s[0], s[1]
}