import { Set } from 'immutable'
import React, { Component } from 'react'
import { Scrollbars } from 'react-custom-scrollbars'
import { DropTarget } from 'react-dnd'
import { connect } from 'react-redux'
import { Link, Prompt, Redirect } from 'react-router-dom'
import * as UIActions from '../../actions/ui'
import Role from '../role/draggable'
import * as Actions from './actions'
import Category from './Category'
import './RoleEditor.sass'

const mapState = ({ rolePicker, roleEditor, servers }, ownProps) => ({
  rp: rolePicker,
  editor: roleEditor,
  server: servers.get(ownProps.match.params.server),
})

const dropTarget = DropTarget(
  Symbol.for('dnd: role'),
  {
    drop(props, monitor, element) {
      element.dropRole({}, 'Uncategorized')(monitor.getItem())
    },
    canDrop(props, monitor) {
      return monitor.getItem().category !== 'Uncategorized'
    },
  },
  (connect, monitor) => ({
    connectDropTarget: connect.dropTarget(),
    isOver: monitor.isOver(),
    isOverCurrent: monitor.isOver({ shallow: true }),
    canDrop: monitor.canDrop(),
    itemType: monitor.getItemType(),
  })
)
class RoleEditor extends Component {
  componentDidMount() {
    const {
      dispatch,
      match: {
        params: { server },
      },
    } = this.props
    dispatch(Actions.constructView(server))
  }

  componentWillReceiveProps(nextProps) {
    if (this.props.match.params.server !== nextProps.match.params.server) {
      const { dispatch } = this.props
      dispatch(
        UIActions.fadeOut(() =>
          dispatch(Actions.constructView(nextProps.match.params.server))
        )
      )
    }
  }

  dropRole = (category, name) => ({ role, category }) => {
    const { dispatch } = this.props
    console.log(role)
    dispatch(Actions.addRoleToCategory(name, category, role))
  }

  createCategory = () => {
    const { dispatch } = this.props
    dispatch(Actions.createCategory)
  }

  saveCategory = (category, name) => () => {
    const { dispatch } = this.props
    dispatch(Actions.saveCategory(name, category))
  }

  deleteCategory = (category, id) => () => {
    const { dispatch } = this.props
    dispatch(Actions.deleteCategory(id, category))
  }

  openEditor = (category, name) => () => {
    const { dispatch } = this.props
    dispatch(Actions.openEditor(name))
  }

  editCategory = (category, id) => (key, type) => event => {
    const { dispatch } = this.props
    let value

    switch (type) {
      case Symbol.for('edit: text'):
        value = event.target.value
        break

      case Symbol.for('edit: bool'):
        value = event.target.checked
        break

      case Symbol.for('edit: select'):
        value = event.target.value
        break

      default:
        value = null
    }

    dispatch(Actions.editCategory({ category, id, key, type, value }))
  }

  resetServer = () => {
    const { dispatch } = this.props
    dispatch({ type: Symbol.for('re: reset') })
  }

  saveServer = () => {
    const {
      dispatch,
      match: {
        params: { server },
      },
    } = this.props
    dispatch(Actions.saveServer(server))
  }

  onBump = (category, name) => move => () =>
    this.props.dispatch(Actions.bumpCategory(category, name)(move))

  get hasChanged() {
    return (
      this.props.editor.get('originalSnapshot').hashCode() !==
      this.props.editor.get('viewMap').hashCode()
    )
  }

  render() {
    const { server } = this.props

    if (server == null) {
      return null
    }

    if (server.getIn(['perms', 'canManageRoles']) !== true) {
      return <Redirect to={`/s/${server.get('id')}`} />
    }

    const vm = this.props.editor.get('viewMap')
    return (
      <div className="inner role-editor">
        <Prompt
          when={this.hasChanged}
          message="Are you sure you want to leave? You have unsaved changes that will be lost."
        />
        <div className="role-picker__header" style={{ marginBottom: 10 }}>
          <h3>{this.props.server.getIn(['server', 'name'])}</h3>
          <div className="role-picker__spacer"></div>
          <div className={`role-picker__actions ${!this.hasChanged ? 'hidden' : ''}`}>
            <button
              onClick={this.resetServer}
              disabled={!this.hasChanged}
              className="uk-button rp-button secondary"
            >
              Reset
            </button>
            <button
              onClick={this.saveServer}
              disabled={!this.hasChanged}
              className="uk-button rp-button primary"
            >
              Save Changes
            </button>
          </div>
        </div>
        <div className="role-editor__grid">
          <div className="role-editor__grid__left">
            <Scrollbars autoHeight autoHeightMax="calc(100vh - 110px)">
              {vm
                .filter((_, k) => k !== 'Uncategorized')
                .sortBy(c => c.get('position'))
                .map((c, name, arr) => (
                  <Category
                    key={name}
                    name={name}
                    category={c}
                    arrMax={arr.count()}
                    mode={c.get('mode')}
                    onDrop={this.dropRole(c, name)}
                    onEdit={this.editCategory(c, name)}
                    onEditOpen={this.openEditor(c, name)}
                    onSave={this.saveCategory(c, name)}
                    onDelete={this.deleteCategory(c, name)}
                    onBump={this.onBump(c, name)}
                  />
                ))
                .toArray()}
              <div
                onClick={this.createCategory}
                uk-tooltip="pos: bottom"
                title="Add new category"
                className="role-editor__category add-button"
              >
                <i uk-icon="icon: plus" />
              </div>
            </Scrollbars>
          </div>
          {this.props.connectDropTarget(
            <div
              className={`role-editor__grid__right drop-zone ${
                this.props.canDrop ? 'can-drop' : ''
              } ${this.props.isOver && this.props.canDrop ? 'is-over' : ''}`}
            >
              <Scrollbars autoHeight autoHeightMax="calc(100vh - 145px)">
                <div className="role-editor__uncat-zone">
                  {(vm.getIn(['Uncategorized', 'roles_map']) || Set())
                    .sortBy(r => r.get('position'))
                    .reverse()
                    .map((r, k) => <Role key={k} categoryId="Uncategorized" role={r} />)
                    .toArray()}
                  {this.props.editor.get('hasSafeRoles') !== true ? (
                    <div className="role-editor__alert">
                      <Link to="/help/why-no-roles">
                        Why are there no roles here? <i uk-icon="icon: info" />
                      </Link>
                    </div>
                  ) : null}
                </div>
              </Scrollbars>
            </div>
          )}
        </div>
      </div>
    )
  }
}

export default connect(mapState)(dropTarget(RoleEditor))