import { Plugin, Transaction } from '@tiptap/pm/state'

import { Editor } from './Editor.js'
import { getExtensionField } from './helpers/getExtensionField.js'
import { ExtensionConfig } from './index.js'
import { InputRule } from './InputRule.js'
import { Mark } from './Mark.js'
import { Node } from './Node.js'
import { PasteRule } from './PasteRule.js'
import {
  AnyConfig,
  Extensions,
  GlobalAttributes,
  KeyboardShortcutCommand,
  ParentConfig,
  RawCommands,
} from './types.js'
import { callOrReturn } from './utilities/callOrReturn.js'
import { mergeDeep } from './utilities/mergeDeep.js'

declare module '@tiptap/core' {
  interface ExtensionConfig<Options = any, Storage = any> {
    [key: string]: any

    /**
     * Name
     */
    name: string

    /**
     * Priority
     */
    priority?: number

    /**
     * Default options
     */
    defaultOptions?: Options

    /**
     * Default Options
     */
    addOptions?: (this: {
      name: string
      parent: Exclude<ParentConfig<ExtensionConfig<Options, Storage>>['addOptions'], undefined>
    }) => Options

    /**
     * Default Storage
     */
    addStorage?: (this: {
      name: string
      options: Options
      parent: Exclude<ParentConfig<ExtensionConfig<Options, Storage>>['addStorage'], undefined>
    }) => Storage

    /**
     * Global attributes
     */
    addGlobalAttributes?: (this: {
      name: string
      options: Options
      storage: Storage
      parent: ParentConfig<ExtensionConfig<Options, Storage>>['addGlobalAttributes']
    }) => GlobalAttributes | {}

    /**
     * Raw
     */
    addCommands?: (this: {
      name: string
      options: Options
      storage: Storage
      editor: Editor
      parent: ParentConfig<ExtensionConfig<Options, Storage>>['addCommands']
    }) => Partial<RawCommands>

    /**
     * Keyboard shortcuts
     */
    addKeyboardShortcuts?: (this: {
      name: string
      options: Options
      storage: Storage
      editor: Editor
      parent: ParentConfig<ExtensionConfig<Options, Storage>>['addKeyboardShortcuts']
    }) => {
      [key: string]: KeyboardShortcutCommand
    }

    /**
     * Input rules
     */
    addInputRules?: (this: {
      name: string
      options: Options
      storage: Storage
      editor: Editor
      parent: ParentConfig<ExtensionConfig<Options, Storage>>['addInputRules']
    }) => InputRule[]

    /**
     * Paste rules
     */
    addPasteRules?: (this: {
      name: string
      options: Options
      storage: Storage
      editor: Editor
      parent: ParentConfig<ExtensionConfig<Options, Storage>>['addPasteRules']
    }) => PasteRule[]

    /**
     * ProseMirror plugins
     */
    addProseMirrorPlugins?: (this: {
      name: string
      options: Options
      storage: Storage
      editor: Editor
      parent: ParentConfig<ExtensionConfig<Options, Storage>>['addProseMirrorPlugins']
    }) => Plugin[]

    /**
     * Extensions
     */
    addExtensions?: (this: {
      name: string
      options: Options
      storage: Storage
      parent: ParentConfig<ExtensionConfig<Options, Storage>>['addExtensions']
    }) => Extensions

    /**
     * Extend Node Schema
     */
    extendNodeSchema?:
      | ((
          this: {
            name: string
            options: Options
            storage: Storage
            parent: ParentConfig<ExtensionConfig<Options, Storage>>['extendNodeSchema']
          },
          extension: Node,
        ) => Record<string, any>)
      | null

    /**
     * Extend Mark Schema
     */
    extendMarkSchema?:
      | ((
          this: {
            name: string
            options: Options
            storage: Storage
            parent: ParentConfig<ExtensionConfig<Options, Storage>>['extendMarkSchema']
          },
          extension: Mark,
        ) => Record<string, any>)
      | null

    /**
     * The editor is not ready yet.
     */
    onBeforeCreate?:
      | ((this: {
          name: string
          options: Options
          storage: Storage
          editor: Editor
          parent: ParentConfig<ExtensionConfig<Options, Storage>>['onBeforeCreate']
        }) => void)
      | null

    /**
     * The editor is ready.
     */
    onCreate?:
      | ((this: {
          name: string
          options: Options
          storage: Storage
          editor: Editor
          parent: ParentConfig<ExtensionConfig<Options, Storage>>['onCreate']
        }) => void)
      | null

    /**
     * The content has changed.
     */
    onUpdate?:
      | ((this: {
          name: string
          options: Options
          storage: Storage
          editor: Editor
          parent: ParentConfig<ExtensionConfig<Options, Storage>>['onUpdate']
        }) => void)
      | null

    /**
     * The selection has changed.
     */
    onSelectionUpdate?:
      | ((this: {
          name: string
          options: Options
          storage: Storage
          editor: Editor
          parent: ParentConfig<ExtensionConfig<Options, Storage>>['onSelectionUpdate']
        }) => void)
      | null

    /**
     * The editor state has changed.
     */
    onTransaction?:
      | ((
          this: {
            name: string
            options: Options
            storage: Storage
            editor: Editor
            parent: ParentConfig<ExtensionConfig<Options, Storage>>['onTransaction']
          },
          props: {
            transaction: Transaction
          },
        ) => void)
      | null

    /**
     * The editor is focused.
     */
    onFocus?:
      | ((
          this: {
            name: string
            options: Options
            storage: Storage
            editor: Editor
            parent: ParentConfig<ExtensionConfig<Options, Storage>>['onFocus']
          },
          props: {
            event: FocusEvent
          },
        ) => void)
      | null

    /**
     * The editor isn’t focused anymore.
     */
    onBlur?:
      | ((
          this: {
            name: string
            options: Options
            storage: Storage
            editor: Editor
            parent: ParentConfig<ExtensionConfig<Options, Storage>>['onBlur']
          },
          props: {
            event: FocusEvent
          },
        ) => void)
      | null

    /**
     * The editor is destroyed.
     */
    onDestroy?:
      | ((this: {
          name: string
          options: Options
          storage: Storage
          editor: Editor
          parent: ParentConfig<ExtensionConfig<Options, Storage>>['onDestroy']
        }) => void)
      | null
  }
}

export class Extension<Options = any, Storage = any> {
  type = 'extension'

  name = 'extension'

  parent: Extension | null = null

  child: Extension | null = null

  options: Options

  storage: Storage

  config: ExtensionConfig = {
    name: this.name,
    defaultOptions: {},
  }

  constructor(config: Partial<ExtensionConfig<Options, Storage>> = {}) {
    this.config = {
      ...this.config,
      ...config,
    }

    this.name = this.config.name

    if (config.defaultOptions && Object.keys(config.defaultOptions).length > 0) {
      console.warn(
        `[tiptap warn]: BREAKING CHANGE: "defaultOptions" is deprecated. Please use "addOptions" instead. Found in extension: "${this.name}".`,
      )
    }

    // TODO: remove `addOptions` fallback
    this.options = this.config.defaultOptions

    if (this.config.addOptions) {
      this.options = callOrReturn(
        getExtensionField<AnyConfig['addOptions']>(this, 'addOptions', {
          name: this.name,
        }),
      )
    }

    this.storage = callOrReturn(
      getExtensionField<AnyConfig['addStorage']>(this, 'addStorage', {
        name: this.name,
        options: this.options,
      }),
    ) || {}
  }

  static create<O = any, S = any>(config: Partial<ExtensionConfig<O, S>> = {}) {
    return new Extension<O, S>(config)
  }

  configure(options: Partial<Options> = {}) {
    // return a new instance so we can use the same extension
    // with different calls of `configure`
    const extension = this.extend()

    extension.options = mergeDeep(this.options as Record<string, any>, options) as Options

    extension.storage = callOrReturn(
      getExtensionField<AnyConfig['addStorage']>(extension, 'addStorage', {
        name: extension.name,
        options: extension.options,
      }),
    )

    return extension
  }

  extend<ExtendedOptions = Options, ExtendedStorage = Storage>(
    extendedConfig: Partial<ExtensionConfig<ExtendedOptions, ExtendedStorage>> = {},
  ) {
    const extension = new Extension<ExtendedOptions, ExtendedStorage>({ ...this.config, ...extendedConfig })

    extension.parent = this

    this.child = extension

    extension.name = extendedConfig.name ? extendedConfig.name : extension.parent.name

    if (extendedConfig.defaultOptions) {
      console.warn(
        `[tiptap warn]: BREAKING CHANGE: "defaultOptions" is deprecated. Please use "addOptions" instead. Found in extension: "${extension.name}".`,
      )
    }

    extension.options = callOrReturn(
      getExtensionField<AnyConfig['addOptions']>(extension, 'addOptions', {
        name: extension.name,
      }),
    )

    extension.storage = callOrReturn(
      getExtensionField<AnyConfig['addStorage']>(extension, 'addStorage', {
        name: extension.name,
        options: extension.options,
      }),
    )

    return extension
  }
}