/*
 * Calendar owner widget
 *
 * @license https://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @package calendar
 * @subpackage etemplate
 * @link https://www.egroupware.org
 * @author Nathan Gray
 */

import {Et2Select} from "../../api/js/etemplate/Et2Select/Et2Select";
import {css, html, nothing, TemplateResult} from "lit";
import {IsEmail} from "../../api/js/etemplate/Validators/IsEmail";
import {SelectOption} from "../../api/js/etemplate/Et2Select/FindSelectOptions";
import {Et2StaticSelectMixin} from "../../api/js/etemplate/Et2Select/StaticOptions";
import {classMap} from "lit/directives/class-map.js";

/**
 * Select widget customised for calendar owner, which can be a user
 * account or group, or an entry from almost any app, or an email address
 *
 */
export class CalendarOwner extends Et2StaticSelectMixin(Et2Select)
{

	static get styles()
	{
		return [
			...super.styles,
			css`
				/* Larger maximum height before scroll*/

				.select__tags {
					max-height: 10em;
				}

				.title {
					float: right;
				}

				/* Hide unwanted vertical scrollbars with 1 row of tags */

				::part(tag) {
					overflow: hidden;
				}
			`
		];
	}

	constructor(...args : any[])
	{
		super(...args);
		this.searchUrl = "calendar_owner_etemplate_widget::ajax_search";
		this.multiple = true;

		// Take grants into account for search
		this.searchOptions['checkgrants'] = true;
	}

	/**
	 * Some [part of a] value is missing from the available options, but should be there, so find and add it.
	 *
	 * This is used when not all options are sent to the client (search, link list).  Ideally we want to send
	 * the options for the current value, but sometimes this is not the best option so here we search or create
	 * the option as needed.  These are not free entries, but need to match some list somewhere.
	 *
	 * @param {string} newValueElement
	 * @protected
	 */
	protected _missingOption(newValueElement : string)
	{
		// Call ajax_owner
		return this.egw().request(this.egw().link(this.egw().ajaxUrl(this.egw().decodePath("calendar_owner_etemplate_widget::ajax_owner"))),
			[newValueElement]).then((results) =>
		{
			return this._processResultCount(results);
		});
	}
	/**
	 * Override parent to show email address in options
	 *
	 * We use this in edit dialog, but the same widget is used in sidemenu where the email is hidden via CSS.
	 * Anything set in "title" will be shown
	 *
	 * @param {SelectOption} option
	 * @returns {TemplateResult}
	 */
	_optionTemplate(option : SelectOption) : TemplateResult
	{
		// Exclude non-matches when searching
		// unless they're already selected, in which case removing them removes them from value
		if(typeof option.isMatch == "boolean" && !option.isMatch && !this.getValueAsArray().includes(option.value))
		{
			return html``;
		}

		const value = (<string>option.value).replaceAll(" ", "___");
		const classes = option.class ? Object.fromEntries((option.class).split(" ").map(k => [k, true])) : {};
		return html`
            <sl-option
                    part="option"
                    exportparts="prefix:tag__prefix, suffix:tag__suffix, image"
                    value="${value}"
                    title="${!option.title || this.noLang ? option.title : this.egw().lang(option.title)}"
                    class=${classMap({
                        "match": option.isMatch,
                        "no-match": !option.isMatch,
                        ...classes
                    })}
                    .option=${option}
                    .selected=${this.getValueAsArray().some(v => v == value)}
                    ?disabled=${option.disabled}
                    .getTextLabel=${() => {return option.label ?? option.value}}
            >
                ${this._iconTemplate(option)}
                ${this.noLang ? option.label : this.egw().lang(option.label)}
                <span class="title">${option.title}</span>
            </sl-option>`;
	}

	/**
	 * Override parent to handle our special additional data types (c#,r#,etc.) when they
	 * are not available client side.
	 *
	 * @param {string|string[]} _value array of selected owners, which can be a number,
	 *	or a number prefixed with one character indicating the resource type.
	 */
	set_value(_value)
	{
		super.set_value(_value);

		// If parent didn't find a label, label will be the same as ID so we
		// can find them that way
		let missing_labels = [];
		this.updateComplete.then(() =>
		{
			// find that can handle option groups
			const find = (option) =>
			{
				if(Array.isArray(option.value))
				{
					return option.value.find(find);
				}
				return option.value == this.value[i];
			}
			for(var i = 0; i < this.value.length; i++)
			{
				if(!this.select_options.find(find))
				{
					missing_labels.push(this.value[i]);
				}
			}
			if(Object.keys(missing_labels).length > 0)
			{
				// Proper label was not found by parent - ask directly
				this.egw().json('calendar_owner_etemplate_widget::ajax_owner', [missing_labels], function(data)
				{
					for(let owner in data)
					{
						if(!owner || typeof owner == "undefined")
						{
							continue;
						}
						// Put it in the list of options
						let index = this.select_options.findIndex(o => o.value == owner);
						let remote_index = this._selected_remote.findIndex(o => o.value == owner);
						if(remote_index !== -1)
						{
							this._selected_remote[remote_index] = data[owner];
						}
						else if(index == -1)
						{
							this._selected_remote.push(data[owner]);
						}
					}
					this.requestUpdate("select_options");
				}, this, true, this).sendRequest();
			}
		});
	}

	/**
	 * Check a value for missing options and remove them.
	 *
	 * Override to allow any value, since we won't have all options
	 *
	 * @param {string[]} value
	 * @returns {string[]}
	 */
	filterOutMissingOptions(value : string[]) : string[]
	{
		return value;
	}

	/**
	 * Override icon for the select option to use lavatar
	 *
	 * @param option
	 * @protected
	 */
	protected _iconTemplate(option : SelectOption)
	{
		// Not a user / contact, no icon - use app image
		if(!option.fname && !option.lname && !option.icon && option.app)
		{
			return html`
                <et2-image src="${option.app}/navbar" style="width: var(--icon-width); display: inline-block"></et2-image>`;
		}
		// lavatar uses a size property, not a CSS variable
		let style = getComputedStyle(this);
		return html`
            <et2-lavatar slot="prefix" part="icon" exportparts="image" .size=${style.getPropertyValue("--icon-width")}
                         lname=${option.lname || nothing}
                         fname=${option.fname || nothing}
                         image=${option.icon || nothing}
            >
            </et2-lavatar>`;
	}

	/**
	 * Check if a free entry value is acceptable.
	 * We only check the free entry, since value can be mixed.
	 *
	 * @param text
	 * @returns {boolean}
	 */
	public validateFreeEntry(text) : boolean
	{
		let validators = [...this.validators, new IsEmail()];
		let result = validators.filter(v =>
			v.execute(text, v.param, {node: this}),
		);
		return result.length == 0;
	}
}

if(!customElements.get("et2-calendar-owner"))
{
	customElements.define("et2-calendar-owner", CalendarOwner);
}