package common

// Convenience types

import (
	"fmt"
	"strconv"
	"strings"
	"time"
)

type (
	// PyTimeStamp is a python-style long nano timestamp
	PyTimestamp time.Time

	// KeepZero is a special float that keeps the trailing zero on marshal
	KeepZero    float64
)

func (f KeepZero) MarshalJSON() ([]byte, error) {
	if float64(f) == float64(int(f)) {
		return []byte(strconv.FormatFloat(float64(f), 'f', 1, 32)), nil
	}
	return []byte(strconv.FormatFloat(float64(f), 'f', -1, 32)), nil
}

const PytTimeFormat = "2006-01-02T15:04:05.999999-07:00"

func (t *PyTimestamp) MarshalJSON() ([]byte, error) {
	rv := fmt.Sprintf("%q", time.Time(*t).Format(PytTimeFormat))
	return []byte(rv), nil
}

func (t *PyTimestamp) UnmarshalJSON(b []byte) error {
	s := strings.Trim(string(b), `"`)
	tm, err := time.Parse(PytTimeFormat, s)
	*t = PyTimestamp(tm)

	return err
}