import { Component } from "../../widgets/component";
import { IComponent } from "../../interfaces/iComponent";
import { Utils as _ } from "../../utils";
import { ColumnGroup } from "../../entities/columnGroup";
import { ColumnApi } from "../../columnController/columnApi";
import { ColumnController } from "../../columnController/columnController";
import { GridOptionsWrapper } from "../../gridOptionsWrapper";
import { Autowired } from "../../context/context";
import { TouchListener } from "../../widgets/touchListener";
import { RefSelector } from "../../widgets/componentAnnotations";
import { OriginalColumnGroup } from "../../entities/originalColumnGroup";
import { GridApi } from "../../gridApi";

export interface IHeaderGroupParams {
    columnGroup: ColumnGroup;
    displayName: string;
    setExpanded: (expanded: boolean) => void;
    api: GridApi;
    columnApi: ColumnApi;
    context: any;
}

export interface IHeaderGroup {}

export interface IHeaderGroupComp extends IHeaderGroup, IComponent<IHeaderGroupParams> {}

export class HeaderGroupComp extends Component implements IHeaderGroupComp {

    @Autowired("columnController") private columnController: ColumnController;
    @Autowired("gridOptionsWrapper") private gridOptionsWrapper: GridOptionsWrapper;

    static TEMPLATE = `<div class="ag-header-group-cell-label" ref="agContainer">` +
        `<span ref="agLabel" class="ag-header-group-text"></span>` +
        `<span ref="agOpened" class="ag-header-icon ag-header-expand-icon ag-header-expand-icon-expanded"></span>` +
        `<span ref="agClosed" class="ag-header-icon ag-header-expand-icon ag-header-expand-icon-collapsed"></span>` +
        `</div>`;

    private params: IHeaderGroupParams;

    @RefSelector("agOpened") private eOpenIcon: HTMLElement;
    @RefSelector("agClosed") private eCloseIcon: HTMLElement;

    constructor() {
        super(HeaderGroupComp.TEMPLATE);
    }

    public init(params: IHeaderGroupParams) {
        this.params = params;

        this.setupLabel();
        this.addGroupExpandIcon();
        this.setupExpandIcons();
    }

    private setupExpandIcons(): void {
        this.addInIcon("columnGroupOpened", "agOpened");
        this.addInIcon("columnGroupClosed", "agClosed");

        let expandAction = (event: MouseEvent) => {
            if (_.isStopPropagationForAgGrid(event)) {
                return;
            }
            let newExpandedValue = !this.params.columnGroup.isExpanded();
            this.columnController.setColumnGroupOpened(this.params.columnGroup.getOriginalColumnGroup(), newExpandedValue, "uiColumnExpanded");
        };

        this.addTouchAndClickListeners(this.eCloseIcon, expandAction);
        this.addTouchAndClickListeners(this.eOpenIcon, expandAction);

        let stopPropagationAction = (event: MouseEvent) => {
            _.stopPropagationForAgGrid(event);
        };

        // adding stopPropagation to the double click for the icons prevents double click action happening
        // when the icons are clicked. if the icons are double clicked, then the groups should open and
        // then close again straight away. if we also listened to double click, then the group would open,
        // close, then open, which is not what we want. double click should only action if the user double
        // clicks outside of the icons.
        this.addDestroyableEventListener(this.eCloseIcon, "dblclick", stopPropagationAction);
        this.addDestroyableEventListener(this.eOpenIcon, "dblclick", stopPropagationAction);

        this.addDestroyableEventListener(this.getGui(), "dblclick", expandAction);

        this.updateIconVisibility();

        let originalColumnGroup = this.params.columnGroup.getOriginalColumnGroup();
        this.addDestroyableEventListener(originalColumnGroup, OriginalColumnGroup.EVENT_EXPANDED_CHANGED, this.updateIconVisibility.bind(this));
        this.addDestroyableEventListener(originalColumnGroup, OriginalColumnGroup.EVENT_EXPANDABLE_CHANGED, this.updateIconVisibility.bind(this));
    }

    private addTouchAndClickListeners(eElement: HTMLElement, action: (event: MouseEvent) => void): void {
        let touchListener = new TouchListener(this.eCloseIcon);

        this.addDestroyableEventListener(touchListener, TouchListener.EVENT_TAP, action);
        this.addDestroyFunc(() => touchListener.destroy());
        this.addDestroyableEventListener(eElement, "click", action);
    }

    private updateIconVisibility(): void {
        let columnGroup = this.params.columnGroup;
        if (columnGroup.isExpandable()) {
            let expanded = this.params.columnGroup.isExpanded();
            _.setVisible(this.eOpenIcon, !expanded);
            _.setVisible(this.eCloseIcon, expanded);
        } else {
            _.setVisible(this.eOpenIcon, false);
            _.setVisible(this.eCloseIcon, false);
        }
    }

    private addInIcon(iconName: string, refName: string): void {
        let eIcon = _.createIconNoSpan(iconName, this.gridOptionsWrapper, null);
        this.getRefElement(refName).appendChild(eIcon);
    }

    private addGroupExpandIcon() {
        if (!this.params.columnGroup.isExpandable()) {
            _.setVisible(this.eOpenIcon, false);
            _.setVisible(this.eCloseIcon, false);
            return;
        }
    }

    private setupLabel(): void {
        // no renderer, default text render
        if (this.params.displayName && this.params.displayName !== "") {
            let eInnerText = this.getRefElement("agLabel");
            eInnerText.innerHTML = this.params.displayName;
        }
    }
}