// @require var JS_GLOBAL_FUNCTION_NAME
// @require var INITIAL_DROPDOWN_DATA
// @require var NAMESPACE
// @require var SET_INSTANCE_URL
if (!JS_GLOBAL_FUNCTION_NAME) throw "Missing JS_GLOBAL_FUNCTION_NAME!";
if (!NAMESPACE) throw "Missing NAMESPACE!";
if (!SET_INSTANCE_URL) throw "Missing SET_INSTANCE_URL!";
if (!DBG) var DBG = false
if (!INITIAL_DROPDOWN_DATA) throw "Missing INITIAL_DROPDOWN_DATA!";
if (!INITIAL_DROPDOWN_DATA.allowed_instances) throw "Missing INITIAL_DROPDOWN_DATA.allowed_instances!";
if (!INITIAL_DROPDOWN_DATA.items) throw "Missing INITIAL_DROPDOWN_DATA.items!";

var instances = {}

var getDropdown = function (pk) {
  if(DBG)console.log('>>> getDropdown('+pk+')...')
  if (!instances[pk]) instances[pk] = buildDropdown(pk)
  return instances[pk]
}

var dropdown = function(pk) {
  if(DBG)console.log('>>> dropdown('+pk+')...')
  return getDropdown(pk)
}

var buildDropdown = function(pk) {
  if (!window.p5VendorJs.React) throw 'Missing p5VendorJs.React'
  if (!window.p5VendorJs.ReactDOM) throw 'Missing p5VendorJs.ReactDOM'
  if (!window.p5VendorJs.Redux) throw 'Missing p5VendorJs.Redux'
  if (!window.p5VendorJs.ReduxThunk) throw 'Missing p5VendorJs.ReduxThunk'
  if (!window.fetch) throw 'Missing window.fetch'
  var React = window.p5VendorJs.React
  var ReactDOM = window.p5VendorJs.ReactDOM
  var h = React.createElement
  var createStore = window.p5VendorJs.Redux.createStore
  var applyMiddleware = window.p5VendorJs.Redux.applyMiddleware
  var ReduxThunk = window.p5VendorJs.ReduxThunk
  if(DBG)console.log('>>> buildDropdown('+pk+')... ', { INITIAL_DROPDOWN_DATA: INITIAL_DROPDOWN_DATA })
  var _btnNode = null
  var _dropdownNode = null

  var _reducer_instance_set_send = function (payload) {
    if(DBG)console.log('RX:_reducer_instance_set_send() payload', payload)
    return function (dispatch, getState) { // ReduxThunk
      if(DBG)console.log('RX:_reducer_instance_set_send() thunk() payload', payload)
      if(DBG)console.log('RX:_reducer_instance_set_send() thunk() getState().item.pk', getState().item.pk)
      var instanceToSet = payload
      dispatch({ type: 'instance_set_request', payload: instanceToSet })
      // return window.fetch(SET_INSTANCE_URL, {
      window.fetch(SET_INSTANCE_URL, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        credentials: 'same-origin',
        body: JSON.stringify({
          namespace: NAMESPACE,
          primaryKey: getState().item.pk,
          instance: payload,
          toConnect: 'yes',
        })
      }).then(function (response) {
        return response.json()
      }).then(function (response) {
        dispatch({ type: 'instance_set_receive', payload: { instance: instanceToSet, response: response } })
      // }).catch(function (e) {
      //   dispatch({ type: 'instance_set_error', payload: e })
      })
      if(DBG)console.log('RX:_reducer_instance_set_send() thunk() END payload', payload)
    }
  }
  var _reducer_instance_set_request = function (state, payload) {
    if(DBG)console.log('RX:_reducer_instance_set_request() payload', payload)
    state.waitingSet.push(payload)
    return state
  }
  var _reducer_instance_set_receive = function (state, payload) {
    if(DBG)console.log('RX:_reducer_instance_set_receive() payload', payload)
    // payload: { instance: instanceToSet, response: response }
    p5UI__notifyAjaxCallback(payload.response)
    // TODO: update whole list in state by response => render list
    state.item.instances.push(payload.instance)
    state.waitingSet = state.waitingSet.filter(function (inst) {
      return inst !== payload.instance
    })
    return state
  }
  var _reducer_instance_set_error = function (state, payload) {
    if(DBG)console.log('RX:_reducer_instance_set_error() payload', payload)
    if(DBG)console.log('DBG network error for set namespace:', payload)
  }

  var _reducer_instance_unset_send = function (payload) {
    if(DBG)console.log('RX:_reducer_instance_unset_send() payload', payload)
    return function (dispatch, getState) { // ReduxThunk
      if(DBG)console.log('RX:_reducer_instance_unset_send() thunk() payload', payload)
      if(DBG)console.log('RX:_reducer_instance_unset_send() thunk() getState().item.pk', getState().item.pk)
      var instanceToUnset = payload
      dispatch({ type: 'instance_unset_request', payload: instanceToUnset })
      window.fetch(SET_INSTANCE_URL, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        credentials: 'same-origin',
        body: JSON.stringify({
          namespace: NAMESPACE,
          primaryKey: getState().item.pk,
          instance: payload,
          toConnect: 'no',
        })
      }).then(function (response) {
        return response.json()
      }).then(function (response) {
        dispatch({ type: 'instance_unset_receive', payload: { instance: instanceToUnset, response: response } })
      // }).catch(function (e) {
      //   dispatch({ type: 'instance_set_error', payload: e })
      })
      if(DBG)console.log('RX:_reducer_instance_unset_send() thunk() END payload', payload)
    }
  }
  var _reducer_instance_unset_request = function (state, payload) {
    if(DBG)console.log('RX:_reducer_instance_unset_request() payload', payload)
    state.waitingUnSet.push(payload)
    return state
  }
  var _reducer_instance_unset_receive = function (state, payload) {
    if(DBG)console.log('RX:_reducer_instance_unset_receive() payload', payload)
    // payload: { instance: instanceToSet, response: response }
    p5UI__notifyAjaxCallback(payload.response)
    // TODO: update whole list in state by response => render list
    state.item.instances = state.item.instances.filter(function (inst) {
      return inst !== payload.instance
    })
    state.waitingUnSet = state.waitingUnSet.filter(function (inst) {
      return inst !== payload.instance
    })
    return state
  }
  var _reducer_instance_unset_error = function (state, payload) {
    if(DBG)console.log('RX:_reducer_instance_unset_error() payload', payload)
    if(DBG)console.log('DBG network error for set namespace:', payload)
  }

  var dropdown = function (state, action) {
    if(DBG)console.log('RX:dropdown()', {type: action.type, payload: action.payload, state: state})
    switch (action.type) {
      case 'INIT': return action.payload
      case 'instance_set_request': return _reducer_instance_set_request(state, action.payload)
      case 'instance_set_receive': return _reducer_instance_set_receive(state, action.payload)
      case 'instance_set_error': return _reducer_instance_set_error(state, action.payload)
      case 'instance_unset_request': return _reducer_instance_unset_request(state, action.payload)
      case 'instance_unset_receive': return _reducer_instance_unset_receive(state, action.payload)
      case 'instance_unset_error': return _reducer_instance_unset_error(state, action.payload)
      case 'filter': {
        var filtrInstance = action.payload
        state.query = filtrInstance
        state.filter = state.allowed_instances.filter(function (inst) {
          return (-1 !== inst.label.toLowerCase().indexOf(filtrInstance.toLowerCase()))
        })
        return state
      }
      default:
        return state
    }
  }
  var store = createStore(
    dropdown,
    applyMiddleware(ReduxThunk)
  )

  var render = function () {
    var state = store.getState()
    if(DBG)console.log('RX:render()...')
    if (!_dropdownNode) return // throw 'Missing dropdownNode'
    if (!_btnNode) return // throw 'Missing btnNode'
    ReactDOM.render(
      h('div', {}, [
        h('div', {
          style: { backgroundColor: '#f7f7f7', padding: '8px 12px', borderBottom: '1px solid #ddd' },
        }, [
          h('div', { className: 'form-group', style: { padding: 0, margin: 0 } }, [
            h('div', { className: 'input-group', style: { padding: 0, margin: 0 } }, [
              h('input', { type: 'text',
                placeholder: 'Szukaj...',
                className: 'p5UI__dropdown-input form-control input-sm',
                onChange: function (e) { store.dispatch({ type: 'filter', payload: e.target.value }); },
                autoFocus: true,
                value: state.query,
              }),
              h('span', { className: 'input-group-addon', style: { padding: '6px', backgroundColor: '#fff' } }, [
                h('span', { className: 'glyphicon glyphicon-remove hover-gray', style: { cursor: 'pointer' },
                  title: "wyczyść",
                  onClick: function (e) { store.dispatch({ type: 'filter', payload: '' }); },
                })
              ])
            ])
          ])
        ]),
        h('div', { style: { backgroundColor: '#fff', padding: '0' } },
          state.filter.map(function (inst) {
            return h('label', { className: 'p5UI__dropdown-item', style: {padding: '8px 12px'} }, [
              _renderReactToggleInstance({ namespace: inst.namespace, store: store }),
              inst.label,
            ])
          })
        ),
      ]),
      _dropdownNode
    );
    setTimeout(function () {
      if (!_dropdownNode) return false
      var searchNode = _dropdownNode.getElementsByTagName('input')[0]
      if (!searchNode) return false
      searchNode.focus()
    }, 100)
  }
  var _renderReactToggleInstance = function (props) {
    var state = props.store.getState()
    if (-1 === state.item.instances.indexOf(props.namespace)) {
      if (-1 === state.waitingSet.indexOf(props.namespace)) {
        return h('input', { type: "checkbox", style: { margin: '0 6px 0 0' },
          onClick: function () { props.store.dispatch(_reducer_instance_set_send(props.namespace)); }
        })
      } else {
        return h('input', { type: "checkbox", checked: "checked", disabled: "disabled", style: { margin: '0 6px 0 0' } })
      }
    } else {
      if (-1 === state.waitingUnSet.indexOf(props.namespace)) {
        return h('input', { type: "checkbox", checked: "checked", style: { margin: '0 6px 0 0' },
          onClick: function () { props.store.dispatch(_reducer_instance_unset_send(props.namespace)); }
        })
      } else {
        return h('input', { type: "checkbox", style: { margin: '0 6px 0 0' } })
      }
    }
  }

  store.subscribe(render)
  store.dispatch({
    type: 'INIT',
    payload: {
      allowed_instances: INITIAL_DROPDOWN_DATA.allowed_instances,
      query: '',
      filter: INITIAL_DROPDOWN_DATA.allowed_instances,
      item: INITIAL_DROPDOWN_DATA.items.filter(function (data) {
        return data['pk'] == pk
      }).pop(),
      waitingSet: [],
      waitingUnSet: [],
    }
  })
  // render(); // shows the initial state - send INIT action

  var _state = {
    allowed_instances: INITIAL_DROPDOWN_DATA.allowed_instances,
    query: '',
    filter: INITIAL_DROPDOWN_DATA.allowed_instances,
    item: INITIAL_DROPDOWN_DATA.items.filter(function (data) { return data['pk'] == pk; }).pop(),
    waitingSet: [],
    waitingUnSet: [],
  }

  return function (btnNode, dropdownNode) {
    _btnNode = btnNode
    _dropdownNode = dropdownNode
    if(DBG)console.log('### F.'+JS_GLOBAL_FUNCTION_NAME, { pk: pk, INITIAL_DROPDOWN_DATA: INITIAL_DROPDOWN_DATA, btnNode: btnNode, dropdownNode: dropdownNode, state: _state }) // TODO: rm globals
    render()
  }
}

global[JS_GLOBAL_FUNCTION_NAME] = dropdown