// store.ts
const _INCREARE = action("_INCREARE")
const _DECREARE = action("_DECREARE")
const _RESET = action("_RESET")

export const counter$ = reducer(0, "counter$", counter$ => {

  on(_INCREARE)
    .writeTo(counter$, () => count => count + 1)

  on(_DECREARE)
    .writeTo(counter$, () => count => count - 1)

  on(_RESET)
    .writeTo(counter$, 0)
})

const _INCREARE = action("_INCREARE")
const _DECREARE = action("_DECREARE")

const on_inc_click = () => dispatch(_INCREARE())
const on_dec_click = () => dispatch(_DECREARE())

on(_INCREARE)
  .map(...)
  .filter(...)
  .writeTo()

on(_DECREARE)
  .map(...)
  .filter(...)
  .writeTo()

const counter$ = reducer(0, "counter$", counter$ => {

  on(_INCREARE)
    .writeTo(counter$, () => count => count + 1)

  on(_DECREARE)
    .writeTo(counter$, () => count => count - 1)
})

const ref$ = ref(0)

ref$.set(10)
ref$.update(value => value + 1)

on(_INCREARE)
  .tap(value => console.log("INCREASE!", value))
  .createEffect()

story("counter log", () => {

  on(_INCREARE)
    .tap(value => console.log("INCREASE!", value))
    .createEffect()

...
})

database(`/foo/bar`)
  .tap(value => { ... })
  .createEffect()


const nestedValue$ = database(`/foo/bar/baz`)

nestedValue$.set(100)
nestedValue$.update(baz => baz + 100)

const nestedValueArray$ = database(`/foo/bar/collection`).orderBy((a, b) => a.timestamp - b.timestamp)

const nestedValue$ = SELECT(db.foo.bar)

UPDATE(db.foo.bar).set(100)
UPDATE(db.foo.bar).update(bar => bar + 100)

DELETE(db.foo.bar)

const nestedValueArray$ = SELECT(db.foo.bar.collection).ORDER_BY((a, b) => a.timestamp - b.timestamp)

const todo = {
  id: 1,
  title: "hello"
}

INSERT(db.foo.bar.collection, "id").VALUES(todo)

testCase("test for counter", ({given, when, then}) => {

  given(streamA$, 10)
  given(streamB$, "abc")
  given(streamC$, "def")

  when(_ACTION_A("abcdef"))

  then(() => {

    on(_ACTION_A.REQUEST)
      .exptectTo("abcdef")

    on(_ACTION_A.SUCCESS)
      .exptectTo(300)

    on(_ACTION_A.FAILTURE)
      .exptectTo(300)
  })

})