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package pflag
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import (
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	"fmt"
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	"strings"
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	"time"
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)
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// -- durationSlice Value
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type durationSliceValue struct {
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	value   *[]time.Duration
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	changed bool
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}
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func newDurationSliceValue(val []time.Duration, p *[]time.Duration) *durationSliceValue {
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	dsv := new(durationSliceValue)
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	dsv.value = p
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	*dsv.value = val
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	return dsv
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}
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func (s *durationSliceValue) Set(val string) error {
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	ss := strings.Split(val, ",")
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	out := make([]time.Duration, len(ss))
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	for i, d := range ss {
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		var err error
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		out[i], err = time.ParseDuration(d)
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		if err != nil {
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			return err
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		}
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	}
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	if !s.changed {
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		*s.value = out
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	} else {
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		*s.value = append(*s.value, out...)
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	}
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	s.changed = true
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	return nil
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}
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func (s *durationSliceValue) Type() string {
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	return "durationSlice"
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}
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func (s *durationSliceValue) String() string {
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	out := make([]string, len(*s.value))
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	for i, d := range *s.value {
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		out[i] = fmt.Sprintf("%s", d)
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	}
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	return "[" + strings.Join(out, ",") + "]"
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}
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func (s *durationSliceValue) fromString(val string) (time.Duration, error) {
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	return time.ParseDuration(val)
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}
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func (s *durationSliceValue) toString(val time.Duration) string {
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	return fmt.Sprintf("%s", val)
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}
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func (s *durationSliceValue) Append(val string) error {
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	i, err := s.fromString(val)
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	if err != nil {
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		return err
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	}
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	*s.value = append(*s.value, i)
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	return nil
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}
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func (s *durationSliceValue) Replace(val []string) error {
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	out := make([]time.Duration, len(val))
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	for i, d := range val {
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		var err error
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		out[i], err = s.fromString(d)
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		if err != nil {
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			return err
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		}
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	}
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	*s.value = out
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	return nil
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}
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func (s *durationSliceValue) GetSlice() []string {
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	out := make([]string, len(*s.value))
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	for i, d := range *s.value {
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		out[i] = s.toString(d)
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	}
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	return out
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}
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func durationSliceConv(val string) (interface{}, error) {
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	val = strings.Trim(val, "[]")
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	// Empty string would cause a slice with one (empty) entry
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	if len(val) == 0 {
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		return []time.Duration{}, nil
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	}
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	ss := strings.Split(val, ",")
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	out := make([]time.Duration, len(ss))
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	for i, d := range ss {
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		var err error
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		out[i], err = time.ParseDuration(d)
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		if err != nil {
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			return nil, err
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		}
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	}
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	return out, nil
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}
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// GetDurationSlice returns the []time.Duration value of a flag with the given name
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func (f *FlagSet) GetDurationSlice(name string) ([]time.Duration, error) {
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	val, err := f.getFlagType(name, "durationSlice", durationSliceConv)
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	if err != nil {
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		return []time.Duration{}, err
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	}
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	return val.([]time.Duration), nil
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}
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// DurationSliceVar defines a durationSlice flag with specified name, default value, and usage string.
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// The argument p points to a []time.Duration variable in which to store the value of the flag.
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func (f *FlagSet) DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {
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	f.VarP(newDurationSliceValue(value, p), name, "", usage)
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}
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// DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.
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func (f *FlagSet) DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {
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	f.VarP(newDurationSliceValue(value, p), name, shorthand, usage)
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}
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// DurationSliceVar defines a duration[] flag with specified name, default value, and usage string.
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// The argument p points to a duration[] variable in which to store the value of the flag.
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func DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {
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	CommandLine.VarP(newDurationSliceValue(value, p), name, "", usage)
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}
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// DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.
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func DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {
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	CommandLine.VarP(newDurationSliceValue(value, p), name, shorthand, usage)
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}
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// DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.
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// The return value is the address of a []time.Duration variable that stores the value of the flag.
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func (f *FlagSet) DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {
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	p := []time.Duration{}
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	f.DurationSliceVarP(&p, name, "", value, usage)
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	return &p
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}
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// DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.
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func (f *FlagSet) DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {
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	p := []time.Duration{}
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	f.DurationSliceVarP(&p, name, shorthand, value, usage)
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	return &p
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}
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// DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.
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// The return value is the address of a []time.Duration variable that stores the value of the flag.
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func DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {
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	return CommandLine.DurationSliceP(name, "", value, usage)
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}
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// DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.
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func DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {
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	return CommandLine.DurationSliceP(name, shorthand, value, usage)
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}
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