package types

import (
	"encoding/json"
)

type Slice []interface{}

// Push 後堆
func (slice *Slice) Push(value interface{}) {
	*slice = append(*slice, value)
}

// Pop 後取
func (slice *Slice) Pop() (value interface{}) {
	length := len(*slice)
	if length > 0 {
		value = (*slice)[length-1]
		*slice = append((*slice)[:length-1])
	}

	return value
}

// Unshift 前堆
func (slice *Slice) Unshift(value interface{}) {
	*slice = append(Slice{value}, *slice...)
}

// Shift 前取
func (slice *Slice) Shift() (value interface{}) {
	length := len(*slice)
	if length > 0 {
		value = (*slice)[0]
		*slice = (*slice)[1:length]
	}

	return value
}

// JSON 取得json
func (slice *Slice) JSON() ([]byte, error) {
	bs, err := json.Marshal(slice)
	if err != nil {
		return nil, err
	}

	return bs, nil
}

// MustJSON 強制取得json
func (slice *Slice) MustJSON() []byte {
	bs, _ := slice.JSON()
	return bs
}