package starmap

import "errors"

func (stack *StarStack) Count() int {
	stack.kvPushmu.Lock()
	defer stack.kvPushmu.Unlock()
	return len(stack.kvStack)
}

func (stack *StarStack) Push(val interface{}) error {
	stack.kvPushmu.Lock()
	defer stack.kvPushmu.Unlock()
	stack.kvStack = append(stack.kvStack, val)
	return nil
}

func (stack *StarStack) Pop() (interface{}, error) {
	stack.kvPushmu.Lock()
	defer stack.kvPushmu.Unlock()
	if len(stack.kvStack) == 0 {
		return nil, errors.New("Empty Stacks")
	}
	val := stack.kvStack[0]
	stack.kvStack = stack.kvStack[1:]
	return val, nil
}

func (stack *StarStack) MustPop() interface{} {
	val, _ := stack.Pop()
	return val
}

func Get(key string) (interface{}, error) {
	var err error
	kvmu.RLock()
	defer kvmu.RUnlock()
	data, ok := kvMap[key]
	if !ok {
		err = errors.New("key not exists")
	}
	return data, err
}

func MustGet(key string) interface{} {
	result, _ := Get(key)
	return result
}

func Store(key string, value interface{}) error {
	kvmu.Lock()
	defer kvmu.Unlock()
	kvMap[key] = value
	return nil
}

func Delete(key string) error {
	kvmu.Lock()
	defer kvmu.Unlock()
	delete(kvMap, key)
	return nil
}

func Range(run func(k string, v interface{}) bool) error {
	for k, v := range kvMap {
		if !run(k, v) {
			break
		}
	}
	return nil
}