import {
    getComputedStyle,
    getTrimmingContainer,
    innerWidth,
    innerHeight,
    offset,
    outerHeight,
    outerWidth,
} from './../../../helpers/dom/element';
import {stopImmediatePropagation} from './../../../helpers/dom/event';
import {isMobileBrowser} from './../../../helpers/browser';
import {EventManager} from './../../../eventManager';
import {WalkontableCellCoords} from './cell/coords';
import {WalkontableOverlay} from './overlay/_base.js';

/**
 *
 */
class WalkontableBorder {
  /**
   * @param {Walkontable} wotInstance
   * @param {Object} settings
   */
  constructor(wotInstance, settings) {
    if (!settings) {
      return;
    }
    this.eventManager = new EventManager(wotInstance);
    this.instance = wotInstance;
    this.wot = wotInstance;
    this.settings = settings;
    this.mouseDown = false;
    this.main = null;

    this.top = null;
    this.left = null;
    this.bottom = null;
    this.right = null;

    this.topStyle = null;
    this.leftStyle = null;
    this.bottomStyle = null;
    this.rightStyle = null;

    this.cornerDefaultStyle = {
      width: '5px',
      height: '5px',
      borderWidth: '2px',
      borderStyle: 'solid',
      borderColor: '#FFF'
    };
    this.corner = null;
    this.cornerStyle = null;

    this.createBorders(settings);
    this.registerListeners();
  }

  /**
   * Register all necessary events
   */
  registerListeners() {
    this.eventManager.addEventListener(document.body, 'mousedown', () => this.onMouseDown());
    this.eventManager.addEventListener(document.body, 'mouseup', () => this.onMouseUp());

    for (let c = 0, len = this.main.childNodes.length; c < len; c++) {
      /* jshint loopfunc:true */
      this.eventManager.addEventListener(this.main.childNodes[c], 'mouseenter', (event) => this.onMouseEnter(event, this.main.childNodes[c]));
    }
  }

  /**
   * Mouse down listener
   *
   * @private
   */
  onMouseDown() {
    this.mouseDown = true;
  }

  /**
   * Mouse up listener
   *
   * @private
   */
  onMouseUp() {
    this.mouseDown = false;
  }

  /**
   * Mouse enter listener for fragment selection functionality.
   *
   * @private
   * @param {Event} event Dom event
   * @param {HTMLElement} parentElement Part of border element.
   */
  onMouseEnter(event, parentElement) {
    if (!this.mouseDown || !this.wot.getSetting('hideBorderOnMouseDownOver')) {
      return;
    }
    event.preventDefault();
    stopImmediatePropagation(event);

    let _this = this;
    let bounds = parentElement.getBoundingClientRect();
    // Hide border to prevents selection jumping when fragmentSelection is enabled.
    parentElement.style.display = 'none';

    function isOutside(event) {
      if (event.clientY < Math.floor(bounds.top)) {
        return true;
      }
      if (event.clientY > Math.ceil(bounds.top + bounds.height)) {
        return true;
      }
      if (event.clientX < Math.floor(bounds.left)) {
        return true;
      }
      if (event.clientX > Math.ceil(bounds.left + bounds.width)) {
        return true;
      }
    }

    function handler(event) {
      if (isOutside(event)) {
        _this.eventManager.removeEventListener(document.body, 'mousemove', handler);
        parentElement.style.display = 'block';
      }
    }

    this.eventManager.addEventListener(document.body, 'mousemove', handler);
  }

  /**
   * Create border elements
   *
   * @param {Object} settings
   */
  createBorders(settings) {
    this.main = document.createElement('div');

    let borderDivs = ['top', 'left', 'bottom', 'right', 'corner'];
    let style = this.main.style;
    style.position = 'absolute';
    style.top = 0;
    style.left = 0;

    for (let i = 0; i < 5; i++) {
      let position = borderDivs[i];
      let div = document.createElement('div');
      div.className = 'wtBorder ' + (this.settings.className || ''); // + borderDivs[i];

      if (this.settings[position] && this.settings[position].hide) {
        div.className += ' hidden';
      }
      style = div.style;
      style.backgroundColor = (this.settings[position] && this.settings[position].color) ? this.settings[position].color : settings.border.color;
      style.height = (this.settings[position] && this.settings[position].width) ? this.settings[position].width + 'px' : settings.border.width + 'px';
      style.width = (this.settings[position] && this.settings[position].width) ? this.settings[position].width + 'px' : settings.border.width + 'px';

      this.main.appendChild(div);
    }
    this.top = this.main.childNodes[0];
    this.left = this.main.childNodes[1];
    this.bottom = this.main.childNodes[2];
    this.right = this.main.childNodes[3];

    this.topStyle = this.top.style;
    this.leftStyle = this.left.style;
    this.bottomStyle = this.bottom.style;
    this.rightStyle = this.right.style;

    this.corner = this.main.childNodes[4];
    this.corner.className += ' corner';
    this.cornerStyle = this.corner.style;
    this.cornerStyle.width = this.cornerDefaultStyle.width;
    this.cornerStyle.height = this.cornerDefaultStyle.height;
    this.cornerStyle.border = [
      this.cornerDefaultStyle.borderWidth,
      this.cornerDefaultStyle.borderStyle,
      this.cornerDefaultStyle.borderColor
    ].join(' ');

    if (isMobileBrowser()) {
      this.createMultipleSelectorHandles();
    }
    this.disappear();

    if (!this.wot.wtTable.bordersHolder) {
      this.wot.wtTable.bordersHolder = document.createElement('div');
      this.wot.wtTable.bordersHolder.className = 'htBorders';
      this.wot.wtTable.spreader.appendChild(this.wot.wtTable.bordersHolder);
    }
    this.wot.wtTable.bordersHolder.insertBefore(this.main, this.wot.wtTable.bordersHolder.firstChild);
  }

  /**
   * Create multiple selector handler for mobile devices
   */
  createMultipleSelectorHandles() {
    this.selectionHandles = {
      topLeft: document.createElement('DIV'),
      topLeftHitArea: document.createElement('DIV'),
      bottomRight: document.createElement('DIV'),
      bottomRightHitArea: document.createElement('DIV')
    };
    let width = 10;
    let hitAreaWidth = 40;

    this.selectionHandles.topLeft.className = 'topLeftSelectionHandle';
    this.selectionHandles.topLeftHitArea.className = 'topLeftSelectionHandle-HitArea';
    this.selectionHandles.bottomRight.className = 'bottomRightSelectionHandle';
    this.selectionHandles.bottomRightHitArea.className = 'bottomRightSelectionHandle-HitArea';

    this.selectionHandles.styles = {
      topLeft: this.selectionHandles.topLeft.style,
      topLeftHitArea: this.selectionHandles.topLeftHitArea.style,
      bottomRight: this.selectionHandles.bottomRight.style,
      bottomRightHitArea: this.selectionHandles.bottomRightHitArea.style
    };

    let hitAreaStyle = {
      position: 'absolute',
      height: hitAreaWidth + 'px',
      width: hitAreaWidth + 'px',
      'border-radius': parseInt(hitAreaWidth / 1.5, 10) + 'px',
    };

    for (let prop in hitAreaStyle) {
      if (hitAreaStyle.hasOwnProperty(prop)) {
        this.selectionHandles.styles.bottomRightHitArea[prop] = hitAreaStyle[prop];
        this.selectionHandles.styles.topLeftHitArea[prop] = hitAreaStyle[prop];
      }
    }

    let handleStyle = {
      position: 'absolute',
      height: width + 'px',
      width: width + 'px',
      'border-radius': parseInt(width / 1.5, 10) + 'px',
      background: '#F5F5FF',
      border: '1px solid #4285c8'
    };

    for (let prop in handleStyle) {
      if (handleStyle.hasOwnProperty(prop)) {
        this.selectionHandles.styles.bottomRight[prop] = handleStyle[prop];
        this.selectionHandles.styles.topLeft[prop] = handleStyle[prop];
      }
    }
    this.main.appendChild(this.selectionHandles.topLeft);
    this.main.appendChild(this.selectionHandles.bottomRight);
    this.main.appendChild(this.selectionHandles.topLeftHitArea);
    this.main.appendChild(this.selectionHandles.bottomRightHitArea);
  }

  isPartRange(row, col) {
    if (this.wot.selections.area.cellRange) {
      if (row != this.wot.selections.area.cellRange.to.row || col != this.wot.selections.area.cellRange.to.col) {
        return true;
      }
    }

    return false;
  }

  updateMultipleSelectionHandlesPosition(row, col, top, left, width, height) {
    let handleWidth = parseInt(this.selectionHandles.styles.topLeft.width, 10);
    let hitAreaWidth = parseInt(this.selectionHandles.styles.topLeftHitArea.width, 10);

    this.selectionHandles.styles.topLeft.top = parseInt(top - handleWidth, 10) + 'px';
    this.selectionHandles.styles.topLeft.left = parseInt(left - handleWidth, 10) + 'px';

    this.selectionHandles.styles.topLeftHitArea.top = parseInt(top - (hitAreaWidth / 4) * 3, 10) + 'px';
    this.selectionHandles.styles.topLeftHitArea.left = parseInt(left - (hitAreaWidth / 4) * 3, 10) + 'px';

    this.selectionHandles.styles.bottomRight.top = parseInt(top + height, 10) + 'px';
    this.selectionHandles.styles.bottomRight.left = parseInt(left + width, 10) + 'px';

    this.selectionHandles.styles.bottomRightHitArea.top = parseInt(top + height - hitAreaWidth / 4, 10) + 'px';
    this.selectionHandles.styles.bottomRightHitArea.left = parseInt(left + width - hitAreaWidth / 4, 10) + 'px';

    if (this.settings.border.multipleSelectionHandlesVisible && this.settings.border.multipleSelectionHandlesVisible()) {
      this.selectionHandles.styles.topLeft.display = 'block';
      this.selectionHandles.styles.topLeftHitArea.display = 'block';

      if (this.isPartRange(row, col)) {
        this.selectionHandles.styles.bottomRight.display = 'none';
        this.selectionHandles.styles.bottomRightHitArea.display = 'none';
      } else {
        this.selectionHandles.styles.bottomRight.display = 'block';
        this.selectionHandles.styles.bottomRightHitArea.display = 'block';
      }
    } else {
      this.selectionHandles.styles.topLeft.display = 'none';
      this.selectionHandles.styles.bottomRight.display = 'none';
      this.selectionHandles.styles.topLeftHitArea.display = 'none';
      this.selectionHandles.styles.bottomRightHitArea.display = 'none';
    }

    if (row == this.wot.wtSettings.getSetting('fixedRowsTop') || col == this.wot.wtSettings.getSetting('fixedColumnsLeft')) {
      this.selectionHandles.styles.topLeft.zIndex = '9999';
      this.selectionHandles.styles.topLeftHitArea.zIndex = '9999';
    } else {
      this.selectionHandles.styles.topLeft.zIndex = '';
      this.selectionHandles.styles.topLeftHitArea.zIndex = '';
    }
  }

  /**
   * Show border around one or many cells
   *
   * @param {Array} corners
   */
  appear(corners) {
    if (this.disabled) {
      return;
    }
    var isMultiple,
        fromTD,
        toTD,
        fromOffset,
        toOffset,
        containerOffset,
        top,
        minTop,
        left,
        minLeft,
        height,
        width,
        fromRow,
        fromColumn,
        toRow,
        toColumn,
        trimmingContainer,
        cornerOverlappingContainer,
        ilen;

    ilen = this.wot.wtTable.getRenderedRowsCount();

    for (let i = 0; i < ilen; i++) {
      let s = this.wot.wtTable.rowFilter.renderedToSource(i);

      if (s >= corners[0] && s <= corners[2]) {
        fromRow = s;
        break;
      }
    }

    for (let i = ilen - 1; i >= 0; i--) {
      let s = this.wot.wtTable.rowFilter.renderedToSource(i);

      if (s >= corners[0] && s <= corners[2]) {
        toRow = s;
        break;
      }
    }

    ilen = this.wot.wtTable.getRenderedColumnsCount();

    for (let i = 0; i < ilen; i++) {
      let s = this.wot.wtTable.columnFilter.renderedToSource(i);

      if (s >= corners[1] && s <= corners[3]) {
        fromColumn = s;
        break;
      }
    }

    for (let i = ilen - 1; i >= 0; i--) {
      let s = this.wot.wtTable.columnFilter.renderedToSource(i);

      if (s >= corners[1] && s <= corners[3]) {
        toColumn = s;
        break;
      }
    }
    if (fromRow === void 0 || fromColumn === void 0) {
      this.disappear();

      return;
    }
    isMultiple = (fromRow !== toRow || fromColumn !== toColumn);
    fromTD = this.wot.wtTable.getCell(new WalkontableCellCoords(fromRow, fromColumn));
    toTD = isMultiple ? this.wot.wtTable.getCell(new WalkontableCellCoords(toRow, toColumn)) : fromTD;
    fromOffset = offset(fromTD);
    toOffset = isMultiple ? offset(toTD) : fromOffset;
    containerOffset = offset(this.wot.wtTable.TABLE);

    minTop = fromOffset.top;
    height = toOffset.top + outerHeight(toTD) - minTop;
    minLeft = fromOffset.left;
    width = toOffset.left + outerWidth(toTD) - minLeft;

    top = minTop - containerOffset.top - 1;
    left = minLeft - containerOffset.left - 1;
    let style = getComputedStyle(fromTD);

    if (parseInt(style.borderTopWidth, 10) > 0) {
      top += 1;
      height = height > 0 ? height - 1 : 0;
    }
    if (parseInt(style.borderLeftWidth, 10) > 0) {
      left += 1;
      width = width > 0 ? width - 1 : 0;
    }

    this.topStyle.top = top + 'px';
    this.topStyle.left = left + 'px';
    this.topStyle.width = width + 'px';
    this.topStyle.display = 'block';

    this.leftStyle.top = top + 'px';
    this.leftStyle.left = left + 'px';
    this.leftStyle.height = height + 'px';
    this.leftStyle.display = 'block';

    let delta = Math.floor(this.settings.border.width / 2);

    this.bottomStyle.top = top + height - delta + 'px';
    this.bottomStyle.left = left + 'px';
    this.bottomStyle.width = width + 'px';
    this.bottomStyle.display = 'block';

    this.rightStyle.top = top + 'px';
    this.rightStyle.left = left + width - delta + 'px';
    this.rightStyle.height = height + 1 + 'px';
    this.rightStyle.display = 'block';

    if (isMobileBrowser() || (!this.hasSetting(this.settings.border.cornerVisible) || this.isPartRange(toRow, toColumn))) {
      this.cornerStyle.display = 'none';
    } else {
      this.cornerStyle.top = top + height - 4 + 'px';
      this.cornerStyle.left = left + width - 4 + 'px';
      this.cornerStyle.borderRightWidth = this.cornerDefaultStyle.borderWidth;
      this.cornerStyle.width = this.cornerDefaultStyle.width;

      // Hide the fill handle, so the possible further adjustments won't force unneeded scrollbars.
      this.cornerStyle.display = 'none';

      trimmingContainer = getTrimmingContainer(this.wot.wtTable.TABLE);

      if (toColumn === this.wot.getSetting('totalColumns') - 1) {
        cornerOverlappingContainer = toTD.offsetLeft + outerWidth(toTD) + (parseInt(this.cornerDefaultStyle.width) / 2) >= innerWidth(trimmingContainer);

        if (cornerOverlappingContainer) {
          this.cornerStyle.left = Math.floor(left + width - 3 - parseInt(this.cornerDefaultStyle.width) / 2) + 'px';
          this.cornerStyle.borderRightWidth = 0;
        }
      }

      if (toRow === this.wot.getSetting('totalRows') - 1) {
        cornerOverlappingContainer = toTD.offsetTop + outerHeight(toTD) + (parseInt(this.cornerDefaultStyle.height) / 2) >= innerHeight(trimmingContainer);

        if (cornerOverlappingContainer) {
          this.cornerStyle.top = Math.floor(top + height - 3 - parseInt(this.cornerDefaultStyle.height) / 2) + 'px';
          this.cornerStyle.borderBottomWidth = 0;
        }
      }

      this.cornerStyle.display = 'block';
    }

    if (isMobileBrowser()) {
      this.updateMultipleSelectionHandlesPosition(fromRow, fromColumn, top, left, width, height);
    }
  }

  /**
   * Hide border
   */
  disappear() {
    this.topStyle.display = 'none';
    this.leftStyle.display = 'none';
    this.bottomStyle.display = 'none';
    this.rightStyle.display = 'none';
    this.cornerStyle.display = 'none';

    if (isMobileBrowser()) {
      this.selectionHandles.styles.topLeft.display = 'none';
      this.selectionHandles.styles.bottomRight.display = 'none';
    }
  }

  /**
   * @param {Function} setting
   * @returns {*}
   */
  hasSetting(setting) {
    if (typeof setting === 'function') {
      return setting();
    }

    return !!setting;
  }
}

export {WalkontableBorder};

window.WalkontableBorder = WalkontableBorder;
