/* global localStorage, fetch */
import { PluginManager } from '@remixproject/engine'
import { IframePlugin } from '@remixproject/engine-web'
import { EventEmitter } from 'events'
import QueryParams from './lib/query-params'
import { PermissionHandler } from './app/ui/persmission-handler'

const requiredModules = [ // services + layout views + system views
  'manager', 'compilerArtefacts', 'compilerMetadata', 'contextualListener', 'editor', 'offsetToLineColumnConverter', 'network', 'theme', 'fileManager', 'contentImport', 'web3Provider', 'scriptRunner', 'fetchAndCompile',
  'mainPanel', 'hiddenPanel', 'sidePanel', 'menuicons', 'fileExplorers',
  'terminal', 'settings', 'pluginManager']

export function isNative (name) {
  const nativePlugins = ['vyper', 'workshops', 'debugger']
  return nativePlugins.includes(name) || requiredModules.includes(name)
}

export function canActivate (name) {
  return ['ethdoc'].includes(name) || isNative(name)
}

export class RemixAppManager extends PluginManager {
  constructor () {
    super()
    this.event = new EventEmitter()
    this.pluginsDirectory = 'https://raw.githubusercontent.com/ethereum/remix-plugins-directory/master/build/metadata.json'
    this.pluginLoader = new PluginLoader()
    this.permissionHandler = new PermissionHandler()
  }

  async canActivatePlugin (from, to) {
    return canActivate(from.name)
  }

  async canDeactivatePlugin (from, to) {
    if (requiredModules.includes(to.name)) return false
    return from.name === 'manager'
  }

  async canCall (from, to, method, message) {
    // Make sure the caller of this methods is the target plugin
    if (to !== this.currentRequest.from) {
      return false
    }
    // skipping native plugins' requests
    if (isNative(from)) {
      return true
    }
    // ask the user for permission
    return await this.permissionHandler.askPermission(this.profiles[from], this.profiles[to], method, message)
  }

  onPluginActivated (plugin) {
    this.pluginLoader.set(plugin, this.actives)
    this.event.emit('activate', plugin)
  }

  getAll () {
    return Object.keys(this.profiles).map((p) => {
      return this.profiles[p]
    })
  }

  getIds () {
    return Object.keys(this.profiles)
  }

  onPluginDeactivated (plugin) {
    this.pluginLoader.set(plugin, this.actives)
    this.event.emit('deactivate', plugin)
  }

  onRegistration () {}

  async ensureActivated (apiName) {
    await this.activatePlugin(apiName)
    this.event.emit('ensureActivated', apiName)
  }

  async ensureDeactivated (apiName) {
    await this.deactivatePlugin(apiName)
    this.event.emit('ensureDeactivated', apiName)
  }

  isRequired (name) {
    return requiredModules.includes(name)
  }

  async registeredPlugins () {
    const res = await fetch(this.pluginsDirectory)
    const plugins = await res.json()
    plugins.push({
      name: 'walletconnect',
      kind: 'provider',
      displayName: 'Wallet Connect',
      events: [],
      methods: ['sendAsync'],
      url: 'ipfs://QmUD93rF9RKaDabCM5jFTHraBKd72HApbv7m9Vd5i5EHZe',
      description: 'Use an external wallet for transacting',
      icon: 'data:image/svg+xml;base64,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',
      location: 'mainPanel'
    })
    return plugins.map(plugin => {
      if (plugin.name === 'scriptRunner') {
        plugin.url = 'ipfs://QmYCUgBadbcHj3B8d8TsT4A2fKYvXGFWt1izxyXasjdWtF'
      }
      return new IframePlugin(plugin)
    })
  }
}

/** @class Reference loaders.
 *  A loader is a get,set based object which load a workspace from a defined sources.
 *  (localStorage, queryParams)
 **/
class PluginLoader {
  get currentLoader () {
    return this.loaders[this.current]
  }

  constructor () {
    const queryParams = new QueryParams()
    this.donotAutoReload = ['remixd'] // that would be a bad practice to force loading some plugins at page load.
    this.loaders = {}
    this.loaders.localStorage = {
      set: (plugin, actives) => {
        if (!this.donotAutoReload.includes(plugin.name)) {
          localStorage.setItem('workspace', JSON.stringify(actives))
        }
      },
      get: () => { return JSON.parse(localStorage.getItem('workspace')) }
    }

    this.loaders.queryParams = {
      set: () => {},
      get: () => {
        const { activate } = queryParams.get()
        if (!activate) return []
        return activate.split(',')
      }
    }

    this.current = queryParams.get().activate ? 'queryParams' : 'localStorage'
  }

  set (plugin, actives) {
    this.currentLoader.set(plugin, actives)
  }

  get () {
    return this.currentLoader.get()
  }
}