package gotime

type Transaction struct {
	tp     string
	before *Timer
	after  *Timer
}

func CreateStartTimerTxns(tmr *Timer) []Transaction {
	t := CreateIntervalTxn()
	t.after = tmr
	return []Transaction{*t}
}

func CreateStopTimerTxns(tmr *Timer) []Transaction {
	t1 := CreateIntervalTxn()
	t1.before = new(Timer)
	t1.before.Beg = tmr.Beg
	t1.before.Tags = tmr.Tags

	t2 := CreateIntervalTxn()
	t2.after = tmr

	return []Transaction{*t1, *t2}
}

func CreateTagChangeTxns(tmr *Timer, oldTags []string) []Transaction {
	t := CreateIntervalTxn()
	t.before = new(Timer)
	t.before.Beg = tmr.Beg
	t.before.End = tmr.End
	t.before.Tags = oldTags
	t.after = tmr

	return []Transaction{*t}
}

func CreateTxn(oldTmr, newTmr *Timer) *Transaction {
	t := Transaction{
		tp:     "interval",
		before: oldTmr,
		after:  newTmr,
	}
	return &t
}

func CreateIntervalTxn() *Transaction {
	t := new(Transaction)
	t.tp = "interval"
	t.before = new(Timer)
	t.after = new(Timer)
	return t
}

func (t *Transaction) SetBefore(tmr *Timer) {
	t.before = tmr
}

func (t *Transaction) SetAfter(tmr *Timer) {
	t.after = tmr
}

func (t *Transaction) ToString() string {
	ret := "txn:\n"
	ret += "  type: " + t.tp + "\n"
	ret += "  before: " + t.before.ToJsonString() + "\n"
	ret += "  after: " + t.after.ToJsonString() + "\n"
	return ret
}

/*
 * START Transaction

txn:
  type: interval
  before:
  after: {"start":"20170111T223025Z","tags":["bcw","bcw-gotime","work"]}

 *
 *
 * STOP Transaction

txn:
  type: interval
  before: {"start":"20170111T201826Z","tags":["bcw","bcw-gotime","work"]}
  after:
txn:
  type: interval
  before:
  after: {"start":"20170111T201826Z","end":"20170111T221747Z","tags":["bcw","bcw-gotime","work"]}

	*
	*
	* TAG Transaction

txn:
  type: interval
  before: {"start":"20170112T123633Z","tags":["bcw","bcw-gotime","work"]}
  after: {"start":"20170112T123633Z","tags":["bcw","bcw-gotime","test","work"]}
*/