import type {
  Bridge,
} from '@vue-devtools/shared-utils'
import {
  HookEvents,
  PluginPermission,
  StateEditor,
  getPluginDefaultSettings,
  getPluginSettings,
  hasPluginPermission,
  setPluginSettings,
} from '@vue-devtools/shared-utils'
import type {
  App,
  ComponentDevtoolsOptions,
  ComponentInstance,
  ComponentTreeNode,
  CustomInspectorOptions,
  DevtoolsPluginApi,
  EditStatePayload,
  HookPayloads,
  TimelineEventOptions,
  TimelineLayerOptions,
  WithId,
} from '@vue/devtools-api'
import {
  Hooks,
  now,
} from '@vue/devtools-api'
import { DevtoolsHookable } from './hooks'
import type { BackendContext } from './backend-context'
import type { Plugin } from './plugin'
import type { DevtoolsBackend } from './backend'
import type { AppRecord } from './app-record'

const pluginOn: DevtoolsHookable[] = []

export class DevtoolsApi {
  bridge: Bridge
  ctx: BackendContext
  backend: DevtoolsBackend
  on: DevtoolsHookable
  stateEditor: StateEditor = new StateEditor()

  constructor(backend: DevtoolsBackend, ctx: BackendContext) {
    this.backend = backend
    this.ctx = ctx
    this.bridge = ctx.bridge
    this.on = new DevtoolsHookable(ctx)
  }

  async callHook<T extends Hooks>(eventType: T, payload: HookPayloads[T], ctx: BackendContext = this.ctx) {
    payload = await this.on.callHandlers(eventType, payload, ctx)
    for (const on of pluginOn) {
      payload = await on.callHandlers(eventType, payload, ctx)
    }
    return payload
  }

  async transformCall(callName: string, ...args) {
    const payload = await this.callHook(Hooks.TRANSFORM_CALL, {
      callName,
      inArgs: args,
      outArgs: args.slice(),
    })
    return payload.outArgs
  }

  async getAppRecordName(app: App, defaultName: string): Promise<string> {
    const payload = await this.callHook(Hooks.GET_APP_RECORD_NAME, {
      app,
      name: null,
    })
    if (payload.name) {
      return payload.name
    }
    else {
      return `App ${defaultName}`
    }
  }

  async getAppRootInstance(app: App) {
    const payload = await this.callHook(Hooks.GET_APP_ROOT_INSTANCE, {
      app,
      root: null,
    })
    return payload.root
  }

  async registerApplication(app: App) {
    await this.callHook(Hooks.REGISTER_APPLICATION, {
      app,
    })
  }

  async walkComponentTree(instance: ComponentInstance, maxDepth = -1, filter: string = null, recursively = false) {
    const payload = await this.callHook(Hooks.WALK_COMPONENT_TREE, {
      componentInstance: instance,
      componentTreeData: null,
      maxDepth,
      filter,
      recursively,
    })
    return payload.componentTreeData
  }

  async visitComponentTree(instance: ComponentInstance, treeNode: ComponentTreeNode, filter: string = null, app: App) {
    const payload = await this.callHook(Hooks.VISIT_COMPONENT_TREE, {
      app,
      componentInstance: instance,
      treeNode,
      filter,
    })
    return payload.treeNode
  }

  async walkComponentParents(instance: ComponentInstance) {
    const payload = await this.callHook(Hooks.WALK_COMPONENT_PARENTS, {
      componentInstance: instance,
      parentInstances: [],
    })
    return payload.parentInstances
  }

  async inspectComponent(instance: ComponentInstance, app: App) {
    const payload = await this.callHook(Hooks.INSPECT_COMPONENT, {
      app,
      componentInstance: instance,
      instanceData: null,
    })
    return payload.instanceData
  }

  async getComponentBounds(instance: ComponentInstance) {
    const payload = await this.callHook(Hooks.GET_COMPONENT_BOUNDS, {
      componentInstance: instance,
      bounds: null,
    })
    return payload.bounds
  }

  async getComponentName(instance: ComponentInstance) {
    const payload = await this.callHook(Hooks.GET_COMPONENT_NAME, {
      componentInstance: instance,
      name: null,
    })
    return payload.name
  }

  async getComponentInstances(app: App) {
    const payload = await this.callHook(Hooks.GET_COMPONENT_INSTANCES, {
      app,
      componentInstances: [],
    })
    return payload.componentInstances
  }

  async getElementComponent(element: HTMLElement | any) {
    const payload = await this.callHook(Hooks.GET_ELEMENT_COMPONENT, {
      element,
      componentInstance: null,
    })
    return payload.componentInstance
  }

  async getComponentRootElements(instance: ComponentInstance) {
    const payload = await this.callHook(Hooks.GET_COMPONENT_ROOT_ELEMENTS, {
      componentInstance: instance,
      rootElements: [],
    })
    return payload.rootElements
  }

  async editComponentState(instance: ComponentInstance, dotPath: string, type: string, state: EditStatePayload, app: App) {
    const arrayPath = dotPath.split('.')
    const payload = await this.callHook(Hooks.EDIT_COMPONENT_STATE, {
      app,
      componentInstance: instance,
      path: arrayPath,
      type,
      state,
      set: (object, path = arrayPath, value = state.value, cb?) => this.stateEditor.set(object, path, value, cb || this.stateEditor.createDefaultSetCallback(state)),
    })
    return payload.componentInstance
  }

  async getComponentDevtoolsOptions(instance: ComponentInstance): Promise<ComponentDevtoolsOptions> {
    const payload = await this.callHook(Hooks.GET_COMPONENT_DEVTOOLS_OPTIONS, {
      componentInstance: instance,
      options: null,
    })
    return payload.options || {}
  }

  async getComponentRenderCode(instance: ComponentInstance): Promise<{
    code: string
  }> {
    const payload = await this.callHook(Hooks.GET_COMPONENT_RENDER_CODE, {
      componentInstance: instance,
      code: null,
    })
    return {
      code: payload.code,
    }
  }

  async inspectTimelineEvent(eventData: TimelineEventOptions & WithId, app: App) {
    const payload = await this.callHook(Hooks.INSPECT_TIMELINE_EVENT, {
      event: eventData.event,
      layerId: eventData.layerId,
      app,
      data: eventData.event.data,
      all: eventData.all,
    })
    return payload.data
  }

  async clearTimeline() {
    await this.callHook(Hooks.TIMELINE_CLEARED, {})
  }

  async getInspectorTree(inspectorId: string, app: App, filter: string) {
    const payload = await this.callHook(Hooks.GET_INSPECTOR_TREE, {
      inspectorId,
      app,
      filter,
      rootNodes: [],
    })
    return payload.rootNodes
  }

  async getInspectorState(inspectorId: string, app: App, nodeId: string) {
    const payload = await this.callHook(Hooks.GET_INSPECTOR_STATE, {
      inspectorId,
      app,
      nodeId,
      state: null,
    })
    return payload.state
  }

  async editInspectorState(inspectorId: string, app: App, nodeId: string, dotPath: string, type: string, state: EditStatePayload) {
    const arrayPath = dotPath.split('.')
    await this.callHook(Hooks.EDIT_INSPECTOR_STATE, {
      inspectorId,
      app,
      nodeId,
      path: arrayPath,
      type,
      state,
      set: (object, path = arrayPath, value = state.value, cb?) => this.stateEditor.set(object, path, value, cb || this.stateEditor.createDefaultSetCallback(state)),
    })
  }

  now() {
    return now()
  }
}

export class DevtoolsPluginApiInstance<TSettings = any> implements DevtoolsPluginApi<TSettings> {
  bridge: Bridge
  ctx: BackendContext
  plugin: Plugin
  appRecord: AppRecord
  backendApi: DevtoolsApi
  on: DevtoolsHookable
  private defaultSettings: TSettings

  constructor(plugin: Plugin, appRecord: AppRecord, ctx: BackendContext) {
    this.bridge = ctx.bridge
    this.ctx = ctx
    this.plugin = plugin
    this.appRecord = appRecord
    this.backendApi = appRecord.backend.api
    this.defaultSettings = getPluginDefaultSettings(plugin.descriptor.settings)
    this.on = new DevtoolsHookable(ctx, plugin)
    pluginOn.push(this.on)
  }

  // Plugin API

  async notifyComponentUpdate(instance: ComponentInstance = null) {
    if (!this.enabled || !this.hasPermission(PluginPermission.COMPONENTS)) {
      return
    }

    if (instance) {
      this.ctx.hook.emit(HookEvents.COMPONENT_UPDATED, ...await this.backendApi.transformCall(HookEvents.COMPONENT_UPDATED, instance))
    }
    else {
      this.ctx.hook.emit(HookEvents.COMPONENT_UPDATED)
    }
  }

  addTimelineLayer(options: TimelineLayerOptions) {
    if (!this.enabled || !this.hasPermission(PluginPermission.TIMELINE)) {
      return false
    }

    this.ctx.hook.emit(HookEvents.TIMELINE_LAYER_ADDED, options, this.plugin)
    return true
  }

  addTimelineEvent(options: TimelineEventOptions) {
    if (!this.enabled || !this.hasPermission(PluginPermission.TIMELINE)) {
      return false
    }

    this.ctx.hook.emit(HookEvents.TIMELINE_EVENT_ADDED, options, this.plugin)
    return true
  }

  addInspector(options: CustomInspectorOptions) {
    if (!this.enabled || !this.hasPermission(PluginPermission.CUSTOM_INSPECTOR)) {
      return false
    }

    this.ctx.hook.emit(HookEvents.CUSTOM_INSPECTOR_ADD, options, this.plugin)
    return true
  }

  sendInspectorTree(inspectorId: string) {
    if (!this.enabled || !this.hasPermission(PluginPermission.CUSTOM_INSPECTOR)) {
      return false
    }

    this.ctx.hook.emit(HookEvents.CUSTOM_INSPECTOR_SEND_TREE, inspectorId, this.plugin)
    return true
  }

  sendInspectorState(inspectorId: string) {
    if (!this.enabled || !this.hasPermission(PluginPermission.CUSTOM_INSPECTOR)) {
      return false
    }

    this.ctx.hook.emit(HookEvents.CUSTOM_INSPECTOR_SEND_STATE, inspectorId, this.plugin)
    return true
  }

  selectInspectorNode(inspectorId: string, nodeId: string) {
    if (!this.enabled || !this.hasPermission(PluginPermission.CUSTOM_INSPECTOR)) {
      return false
    }

    this.ctx.hook.emit(HookEvents.CUSTOM_INSPECTOR_SELECT_NODE, inspectorId, nodeId, this.plugin)
    return true
  }

  getComponentBounds(instance: ComponentInstance) {
    return this.backendApi.getComponentBounds(instance)
  }

  getComponentName(instance: ComponentInstance) {
    return this.backendApi.getComponentName(instance)
  }

  getComponentInstances(app: App) {
    return this.backendApi.getComponentInstances(app)
  }

  highlightElement(instance: ComponentInstance) {
    if (!this.enabled || !this.hasPermission(PluginPermission.COMPONENTS)) {
      return false
    }

    this.ctx.hook.emit(HookEvents.COMPONENT_HIGHLIGHT, instance.__VUE_DEVTOOLS_UID__, this.plugin)
    return true
  }

  unhighlightElement() {
    if (!this.enabled || !this.hasPermission(PluginPermission.COMPONENTS)) {
      return false
    }

    this.ctx.hook.emit(HookEvents.COMPONENT_UNHIGHLIGHT, this.plugin)
    return true
  }

  getSettings(pluginId?: string) {
    return getPluginSettings(pluginId ?? this.plugin.descriptor.id, this.defaultSettings)
  }

  setSettings(value: TSettings, pluginId?: string) {
    setPluginSettings(pluginId ?? this.plugin.descriptor.id, value)
  }

  now() {
    return now()
  }

  private get enabled() {
    return hasPluginPermission(this.plugin.descriptor.id, PluginPermission.ENABLED)
  }

  private hasPermission(permission: PluginPermission) {
    return hasPluginPermission(this.plugin.descriptor.id, permission)
  }
}