/**
 * Copyright (c) 2017 The xterm.js authors. All rights reserved.
 * @license MIT
 */

import { IEventEmitter } from 'xterm';
import { ITerminalOptions, ILinkMatcherOptions, IMouseZoneManager, LinkMatcherHandler, LinkMatcherValidationCallback, LineData, IColorSet, IRenderer, IBufferSet, IBuffer, ISelectionManager } from '../typings/xterm-internal';

export type CustomKeyEventHandler = (event: KeyboardEvent) => boolean;

export enum LinkHoverEventTypes {
  HOVER = 'linkhover',
  TOOLTIP = 'linktooltip',
  LEAVE = 'linkleave'
}

/**
 * This interface encapsulates everything needed from the Terminal by the
 * InputHandler. This cleanly separates the large amount of methods needed by
 * InputHandler cleanly from the ITerminal interface.
 */
export interface IInputHandlingTerminal extends IEventEmitter {
  element: HTMLElement;
  options: ITerminalOptions;
  cols: number;
  rows: number;
  charset: ICharset;
  gcharset: number;
  glevel: number;
  charsets: ICharset[];
  applicationKeypad: boolean;
  applicationCursor: boolean;
  originMode: boolean;
  insertMode: boolean;
  wraparoundMode: boolean;
  bracketedPasteMode: boolean;
  defAttr: number;
  curAttr: number;
  prefix: string;
  savedCols: number;
  x10Mouse: boolean;
  vt200Mouse: boolean;
  normalMouse: boolean;
  mouseEvents: boolean;
  sendFocus: boolean;
  utfMouse: boolean;
  sgrMouse: boolean;
  urxvtMouse: boolean;
  cursorHidden: boolean;

  buffers: IBufferSet;
  buffer: IBuffer;
  viewport: IViewport;
  selectionManager: ISelectionManager;

  bell(): void;
  focus(): void;
  convertEol: boolean;
  updateRange(y: number): void;
  scroll(isWrapped?: boolean): void;
  setgLevel(g: number): void;
  eraseAttr(): number;
  eraseRight(x: number, y: number): void;
  eraseLine(y: number): void;
  eraseLeft(x: number, y: number): void;
  blankLine(cur?: boolean, isWrapped?: boolean): LineData;
  is(term: string): boolean;
  send(data: string): void;
  setgCharset(g: number, charset: ICharset): void;
  resize(x: number, y: number): void;
  log(text: string, data?: any): void;
  reset(): void;
  showCursor(): void;
  refresh(start: number, end: number): void;
  matchColor(r1: number, g1: number, b1: number): number;
  error(text: string, data?: any): void;
  setOption(key: string, value: any): void;
}

export interface IViewport {
  syncScrollArea(): void;
  onWheel(ev: WheelEvent): void;
  onTouchStart(ev: TouchEvent): void;
  onTouchMove(ev: TouchEvent): void;
  onThemeChanged(colors: IColorSet): void;
}

export interface ICompositionHelper {
  compositionstart(): void;
  compositionupdate(ev: CompositionEvent): void;
  compositionend(): void;
  updateCompositionElements(dontRecurse?: boolean): void;
  keydown(ev: KeyboardEvent): boolean;
}

/**
 * Handles actions generated by the parser.
 */
export interface IInputHandler {
  addChar(char: string, code: number): void;

  /** C0 BEL */ bell(): void;
  /** C0 LF */ lineFeed(): void;
  /** C0 CR */ carriageReturn(): void;
  /** C0 BS */ backspace(): void;
  /** C0 HT */ tab(): void;
  /** C0 SO */ shiftOut(): void;
  /** C0 SI */ shiftIn(): void;

  /** CSI @ */ insertChars(params?: number[]): void;
  /** CSI A */ cursorUp(params?: number[]): void;
  /** CSI B */ cursorDown(params?: number[]): void;
  /** CSI C */ cursorForward(params?: number[]): void;
  /** CSI D */ cursorBackward(params?: number[]): void;
  /** CSI E */ cursorNextLine(params?: number[]): void;
  /** CSI F */ cursorPrecedingLine(params?: number[]): void;
  /** CSI G */ cursorCharAbsolute(params?: number[]): void;
  /** CSI H */ cursorPosition(params?: number[]): void;
  /** CSI I */ cursorForwardTab(params?: number[]): void;
  /** CSI J */ eraseInDisplay(params?: number[]): void;
  /** CSI K */ eraseInLine(params?: number[]): void;
  /** CSI L */ insertLines(params?: number[]): void;
  /** CSI M */ deleteLines(params?: number[]): void;
  /** CSI P */ deleteChars(params?: number[]): void;
  /** CSI S */ scrollUp(params?: number[]): void;
  /** CSI T */ scrollDown(params?: number[]): void;
  /** CSI X */ eraseChars(params?: number[]): void;
  /** CSI Z */ cursorBackwardTab(params?: number[]): void;
  /** CSI ` */ charPosAbsolute(params?: number[]): void;
  /** CSI a */ HPositionRelative(params?: number[]): void;
  /** CSI b */ repeatPrecedingCharacter(params?: number[]): void;
  /** CSI c */ sendDeviceAttributes(params?: number[]): void;
  /** CSI d */ linePosAbsolute(params?: number[]): void;
  /** CSI e */ VPositionRelative(params?: number[]): void;
  /** CSI f */ HVPosition(params?: number[]): void;
  /** CSI g */ tabClear(params?: number[]): void;
  /** CSI h */ setMode(params?: number[]): void;
  /** CSI l */ resetMode(params?: number[]): void;
  /** CSI m */ charAttributes(params?: number[]): void;
  /** CSI n */ deviceStatus(params?: number[]): void;
  /** CSI p */ softReset(params?: number[]): void;
  /** CSI q */ setCursorStyle(params?: number[]): void;
  /** CSI r */ setScrollRegion(params?: number[]): void;
  /** CSI s */ saveCursor(params?: number[]): void;
  /** CSI u */ restoreCursor(params?: number[]): void;
}

export interface ILinkMatcher {
  id: number;
  regex: RegExp;
  handler: LinkMatcherHandler;
  hoverTooltipCallback?: LinkMatcherHandler;
  hoverLeaveCallback?: () => void;
  matchIndex?: number;
  validationCallback?: LinkMatcherValidationCallback;
  priority?: number;
}

export interface ICharset {
  [key: string]: string;
}

export interface ILinkHoverEvent {
  x: number;
  y: number;
  length: number;
}