package pflag

// -- stringArray Value

type stringArrayValue struct {

	value   *[]string

	changed bool

}

func newStringArrayValue(val []string, p *[]string) *stringArrayValue {

	ssv := new(stringArrayValue)

	ssv.value = p

	*ssv.value = val

	return ssv

}

func (s *stringArrayValue) Set(val string) error {

	if !s.changed {

		*s.value = []string{val}

		s.changed = true

	} else {

		*s.value = append(*s.value, val)

	}

	return nil

}

func (s *stringArrayValue) Type() string {

	return "stringArray"

}

func (s *stringArrayValue) String() string {

	str, _ := writeAsCSV(*s.value)

	return "[" + str + "]"

}

func stringArrayConv(sval string) (interface{}, error) {

	sval = sval[1 : len(sval)-1]

	// An empty string would cause a array with one (empty) string

	if len(sval) == 0 {

		return []string{}, nil

	}

	return readAsCSV(sval)

}

// GetStringArray return the []string value of a flag with the given name

func (f *FlagSet) GetStringArray(name string) ([]string, error) {

	val, err := f.getFlagType(name, "stringArray", stringArrayConv)

	if err != nil {

		return []string{}, err

	}

	return val.([]string), nil

}

// StringArrayVar defines a string flag with specified name, default value, and usage string.

// The argument p points to a []string variable in which to store the values of the multiple flags.

// The value of each argument will not try to be separated by comma. Use a StringSlice for that.

func (f *FlagSet) StringArrayVar(p *[]string, name string, value []string, usage string) {

	f.VarP(newStringArrayValue(value, p), name, "", usage)

}

// StringArrayVarP is like StringArrayVar, but accepts a shorthand letter that can be used after a single dash.

func (f *FlagSet) StringArrayVarP(p *[]string, name, shorthand string, value []string, usage string) {

	f.VarP(newStringArrayValue(value, p), name, shorthand, usage)

}

// StringArrayVar defines a string flag with specified name, default value, and usage string.

// The argument p points to a []string variable in which to store the value of the flag.

// The value of each argument will not try to be separated by comma. Use a StringSlice for that.

func StringArrayVar(p *[]string, name string, value []string, usage string) {

	CommandLine.VarP(newStringArrayValue(value, p), name, "", usage)

}

// StringArrayVarP is like StringArrayVar, but accepts a shorthand letter that can be used after a single dash.

func StringArrayVarP(p *[]string, name, shorthand string, value []string, usage string) {

	CommandLine.VarP(newStringArrayValue(value, p), name, shorthand, usage)

}

// StringArray defines a string flag with specified name, default value, and usage string.

// The return value is the address of a []string variable that stores the value of the flag.

// The value of each argument will not try to be separated by comma. Use a StringSlice for that.

func (f *FlagSet) StringArray(name string, value []string, usage string) *[]string {

	p := []string{}

	f.StringArrayVarP(&p, name, "", value, usage)

	return &p

}

// StringArrayP is like StringArray, but accepts a shorthand letter that can be used after a single dash.

func (f *FlagSet) StringArrayP(name, shorthand string, value []string, usage string) *[]string {

	p := []string{}

	f.StringArrayVarP(&p, name, shorthand, value, usage)

	return &p

}

// StringArray defines a string flag with specified name, default value, and usage string.

// The return value is the address of a []string variable that stores the value of the flag.

// The value of each argument will not try to be separated by comma. Use a StringSlice for that.

func StringArray(name string, value []string, usage string) *[]string {

	return CommandLine.StringArrayP(name, "", value, usage)

}

// StringArrayP is like StringArray, but accepts a shorthand letter that can be used after a single dash.

func StringArrayP(name, shorthand string, value []string, usage string) *[]string {

	return CommandLine.StringArrayP(name, shorthand, value, usage)

}