/* Einstellungen → LIT MCP: copy the server URL, live group feedback and collapsible tool
   groups, filter paging, and a question before a role save that locks people out. */
( function () {
	'use strict';

	// "URL kopieren" – like WordPress' "Copy URL to clipboard" in the media library.
	function setUpCopyButton() {
		var hideTimeout;

		if ( ! window.ClipboardJS || ! document.querySelector( '.lit-mcp-copy' ) ) {
			return;
		}
		new window.ClipboardJS( '.lit-mcp-copy' ).on( 'success', function ( event ) {
			var success = event.trigger.parentNode.querySelector( '.success' );

			event.clearSelection();
			event.trigger.focus();
			if ( success ) {
				clearTimeout( hideTimeout );
				success.classList.remove( 'hidden' );
				hideTimeout = setTimeout( function () {
					success.classList.add( 'hidden' );
				}, 3000 );
			}
			if ( window.wp && window.wp.a11y && window.litMcpAdmin ) {
				window.wp.a11y.speak( window.litMcpAdmin.copied );
			}
		} );
	}

	// Tool groups: WordPress' own postbox toggles, closed state saved per user.
	function setUpGroupToggles() {
		if ( window.postboxes && window.pagenow && document.querySelector( '.lit-mcp-groups' ) ) {
			window.postboxes.add_postbox_toggles( window.pagenow );
		}
	}

	/*
	 * Tools: a group's mode and its "nur lesen" switch show on the group's rows at once,
	 * the same way the page renders them after saving (the server stays the authority).
	 */
	function setUpLiveGroupFeedback() {
		var groups = document.querySelector( '.lit-mcp-groups' );

		if ( ! groups ) {
			return;
		}
		groups.querySelectorAll( '.lit-mcp-group' ).forEach( function ( group ) {
			var mode = group.querySelector( '.lit-mcp-group-mode' );
			var readonly = group.querySelector( '.lit-mcp-group-readonly' );
			var tools = group.querySelectorAll( '.lit-mcp-tool-mode' );

			if ( mode ) {
				mode.addEventListener( 'change', function () {
					tools.forEach( function ( select ) {
						labelInheritedOption( select, mode, groups.dataset.likeGroup );
					} );
				} );
			}
			if ( readonly ) {
				readonly.addEventListener( 'change', function () {
					tools.forEach( function ( select ) {
						if ( select.dataset.writes ) {
							lockTool( select, readonly.checked );
						}
					} );
				} );
			}
		} );
	}

	// First option: "Standard (…)" without a group mode, "wie Gruppe (…)" with one.
	function labelInheritedOption( select, mode, likeGroup ) {
		var label;

		if ( select.dataset.required ) {
			return;
		}
		if ( ! mode.value ) {
			select.options[ 0 ].text = select.dataset.defaultLabel;
			return;
		}
		label = mode.options[ mode.selectedIndex ].text;
		if ( select.dataset.directOnly && mode.value === 'indirect' ) {
			label = optionText( select, 'direct' ) || label;
		}
		select.options[ 0 ].text = likeGroup.replace( '%s', label );
	}

	function optionText( select, value ) {
		var option = select.querySelector( 'option[value="' + value + '"]' );

		return option ? option.text : '';
	}

	/*
	 * "Nur lesen": the select of a writing tool is disabled and its note shown. A disabled
	 * select is not submitted, so its own setting is kept in a hidden field meanwhile
	 * (the server does the same when it renders a locked row).
	 */
	function lockTool( select, locked ) {
		var cell = select.parentNode;
		var note = cell.querySelector( '.lit-mcp-readonly-note' );
		var keep = cell.querySelector( 'input[type="hidden"][name="' + select.name + '"]' );

		select.disabled = locked;
		if ( locked && select.value && ! keep ) {
			keep = document.createElement( 'input' );
			keep.type = 'hidden';
			keep.name = select.name;
			keep.value = select.value;
			cell.appendChild( keep );
		}
		if ( ! locked && keep ) {
			keep.remove();
		}
		if ( note ) {
			note.hidden = ! locked;
		}
	}

	// Protokoll: a changed filter starts again on page 1.
	function setUpFilterPaging() {
		document.querySelectorAll( '.lit-mcp-log-filters select, .lit-mcp-log-filters input' ).forEach(
			function ( control ) {
				control.addEventListener( 'change', function () {
					var paged = control.form && control.form.querySelector( 'input[name="paged"]' );
					if ( paged ) {
						paged.value = '1';
					}
				} );
			}
		);
	}

	// Zugriff: ask before saving a role set that leaves nobody, or the admin themselves, with access.
	function setUpAccessConfirmation() {
		var form = document.querySelector( '.lit-mcp-access-form' );

		if ( ! form ) {
			return;
		}
		form.addEventListener( 'submit', function ( event ) {
			var checked = Array.prototype.map.call(
				form.querySelectorAll( 'input[type="checkbox"]:checked' ),
				function ( box ) {
					return box.value;
				}
			);
			var own = form.dataset.ownRoles ? form.dataset.ownRoles.split( ' ' ) : null;
			var question = '';

			if ( checked.length === 0 ) {
				question = form.dataset.confirmNone;
			} else if ( own && ! own.some( function ( role ) { return checked.indexOf( role ) !== -1; } ) ) {
				question = form.dataset.confirmOwn;
			}
			if ( question && ! window.confirm( question ) ) {
				event.preventDefault();
			}
		} );
	}

	document.addEventListener( 'DOMContentLoaded', function () {
		setUpCopyButton();
		setUpGroupToggles();
		setUpLiveGroupFeedback();
		setUpFilterPaging();
		setUpAccessConfirmation();
	} );
}() );