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package pflag
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import (
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	"bytes"
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	"fmt"
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	"strconv"
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	"strings"
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)
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// -- stringToInt Value
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type stringToIntValue struct {
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	value   *map[string]int
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	changed bool
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}
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func newStringToIntValue(val map[string]int, p *map[string]int) *stringToIntValue {
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	ssv := new(stringToIntValue)
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	ssv.value = p
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	*ssv.value = val
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	return ssv
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}
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// Format: a=1,b=2
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func (s *stringToIntValue) Set(val string) error {
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	ss := strings.Split(val, ",")
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	out := make(map[string]int, len(ss))
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	for _, pair := range ss {
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		kv := strings.SplitN(pair, "=", 2)
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		if len(kv) != 2 {
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			return fmt.Errorf("%s must be formatted as key=value", pair)
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		}
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		var err error
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		out[kv[0]], err = strconv.Atoi(kv[1])
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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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		for k, v := range out {
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			(*s.value)[k] = v
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		}
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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 *stringToIntValue) Type() string {
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	return "stringToInt"
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}
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func (s *stringToIntValue) String() string {
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	var buf bytes.Buffer
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	i := 0
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	for k, v := range *s.value {
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		if i > 0 {
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			buf.WriteRune(',')
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		}
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		buf.WriteString(k)
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		buf.WriteRune('=')
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		buf.WriteString(strconv.Itoa(v))
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		i++
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	}
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	return "[" + buf.String() + "]"
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}
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func stringToIntConv(val string) (interface{}, error) {
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	val = strings.Trim(val, "[]")
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	// An empty string would cause an empty map
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	if len(val) == 0 {
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		return map[string]int{}, nil
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	}
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	ss := strings.Split(val, ",")
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	out := make(map[string]int, len(ss))
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	for _, pair := range ss {
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		kv := strings.SplitN(pair, "=", 2)
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		if len(kv) != 2 {
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			return nil, fmt.Errorf("%s must be formatted as key=value", pair)
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		}
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		var err error
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		out[kv[0]], err = strconv.Atoi(kv[1])
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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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// GetStringToInt return the map[string]int value of a flag with the given name
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func (f *FlagSet) GetStringToInt(name string) (map[string]int, error) {
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	val, err := f.getFlagType(name, "stringToInt", stringToIntConv)
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	if err != nil {
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		return map[string]int{}, err
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	}
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	return val.(map[string]int), nil
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}
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// StringToIntVar defines a string flag with specified name, default value, and usage string.
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// The argument p points to a map[string]int variable in which to store the values of the multiple flags.
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// The value of each argument will not try to be separated by comma
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func (f *FlagSet) StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) {
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	f.VarP(newStringToIntValue(value, p), name, "", usage)
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}
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// StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash.
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func (f *FlagSet) StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) {
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	f.VarP(newStringToIntValue(value, p), name, shorthand, usage)
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}
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// StringToIntVar defines a string flag with specified name, default value, and usage string.
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// The argument p points to a map[string]int variable in which to store the value of the flag.
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// The value of each argument will not try to be separated by comma
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func StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) {
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	CommandLine.VarP(newStringToIntValue(value, p), name, "", usage)
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}
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// StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash.
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func StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) {
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	CommandLine.VarP(newStringToIntValue(value, p), name, shorthand, usage)
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}
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// StringToInt defines a string flag with specified name, default value, and usage string.
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// The return value is the address of a map[string]int variable that stores the value of the flag.
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// The value of each argument will not try to be separated by comma
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func (f *FlagSet) StringToInt(name string, value map[string]int, usage string) *map[string]int {
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	p := map[string]int{}
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	f.StringToIntVarP(&p, name, "", value, usage)
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	return &p
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}
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// StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash.
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func (f *FlagSet) StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int {
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	p := map[string]int{}
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	f.StringToIntVarP(&p, name, shorthand, value, usage)
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	return &p
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}
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// StringToInt defines a string flag with specified name, default value, and usage string.
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// The return value is the address of a map[string]int variable that stores the value of the flag.
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// The value of each argument will not try to be separated by comma
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func StringToInt(name string, value map[string]int, usage string) *map[string]int {
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	return CommandLine.StringToIntP(name, "", value, usage)
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}
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// StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash.
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func StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int {
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	return CommandLine.StringToIntP(name, shorthand, value, usage)
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}
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