/* global jQuery, wp, m365LoginAdmin */
( function ( $ ) {
	'use strict';

	var cfg = window.m365LoginAdmin || {};
	cfg.nonces = cfg.nonces || {};
	var i18n = cfg.i18n || {};

	$( function () {
		var $preview = $( '#m365-preview' );

		/* ---------------- Tabs ---------------- */
		var $tabs = $( '.m365-admin__tab' );
		var $panels = $( '.m365-admin__panel' );

		function activate( name ) {
			$tabs.removeClass( 'is-active' ).attr( 'aria-selected', 'false' ).filter( '[data-tab="' + name + '"]' ).addClass( 'is-active' ).attr( 'aria-selected', 'true' );
			$panels.removeClass( 'is-active' ).filter( '[data-panel="' + name + '"]' ).addClass( 'is-active' );
			try {
				window.localStorage.setItem( 'm365LoginTab', name );
			} catch ( e ) {}
			// Keep the URL (and the post-save redirect) on this tab.
			var $referer = $( '#m365-referer' );
			if ( $referer.length && window.history && window.history.replaceState ) {
				var url = new URL( window.location.href );
				if ( 'connection' === name ) {
					url.searchParams.delete( 'tab' );
				} else {
					url.searchParams.set( 'tab', name );
				}
				url.searchParams.delete( 'settings-updated' );
				window.history.replaceState( null, '', url.toString() );
				$referer.val( url.pathname + url.search );
			}
		}

		$tabs.on( 'click', function () {
			activate( $( this ).data( 'tab' ) );
		} );

		var initial = $( '.m365-admin__tabs' ).data( 'initial-tab' );
		if ( initial && $tabs.filter( '[data-tab="' + initial + '"]' ).length ) {
			activate( initial );
		} else {
			try {
				var saved = window.localStorage.getItem( 'm365LoginTab' );
				if ( saved && $tabs.filter( '[data-tab="' + saved + '"]' ).length ) {
					activate( saved );
				}
			} catch ( e ) {}
		}

		// Jump to the tab that contains a validation error.
		var $error = $( '.settings-error' ).first();
		if ( $error.length && $error.text().toLowerCase().indexOf( 'tenant' ) !== -1 ) {
			activate( 'connection' );
		}

		/* ---------------- Live preview ---------------- */
		function setVar( name, value ) {
			$preview[ 0 ].style.setProperty( '--m365-' + name, value );
		}

		function updateIcon() {
			var show = $( '[data-preview="show-icon"]' ).is( ':checked' );
			var url = $.trim( $( '#m365-icon-url' ).val() );
			var $icon = $( '#m365-preview-icon' );
			var $thumb = $( '#m365-icon-thumb' );

			$icon.toggleClass( 'is-hidden', ! show );

			if ( url ) {
				var $img = $( '<img>', { src: url, alt: '' } );
				$icon.empty().append( $img );
				$thumb.empty().append( $img.clone() );
			} else {
				$icon.html( cfg.defaultLogo || '' );
				$thumb.html( cfg.defaultLogo || '' );
			}
		}

		$( '[data-preview="text"]' ).on( 'input', function () {
			$( '#m365-preview-text' ).text( $( this ).val() );
		} );

		$( '[data-preview="divider"]' ).on( 'input', function () {
			var val = $.trim( $( this ).val() );
			$( '#m365-preview-divider' ).text( val ).closest( '.m365-login__divider' ).toggleClass( 'is-hidden', ! val );
		} ).trigger( 'input' );

		$( '[data-preview="show-icon"], #m365-icon-url' ).on( 'change input', updateIcon );

		$( '[data-preview="radius"]' ).on( 'input change', function () {
			setVar( 'radius', $( this ).val() + 'px' );
			$( '#m365-radius-value' ).text( $( this ).val() + ' px' );
		} );

		$( '.m365-color' ).wpColorPicker( {
			change: function ( event, ui ) {
				var key = $( event.target ).data( 'preview' );
				var color = ui.color.toString();
				setVar( key.replace( '_', '-' ), color );
			},
			clear: function ( event ) {
				var $input = $( event.target ).closest( '.wp-picker-container' ).find( '.m365-color' );
				setVar( $input.data( 'preview' ).replace( '_', '-' ), $input.data( 'default-color' ) );
			}
		} );

		$( '.m365-preset' ).on( 'click', function () {
			var preset = $( this ).data( 'preset' );
			if ( ! preset ) {
				return;
			}
			$.each( preset, function ( key, value ) {
				$( '#m365-button_' + key ).wpColorPicker( 'color', value );
			} );
		} );

		/* ---------------- Media library ---------------- */
		var frame;
		$( '#m365-icon-choose' ).on( 'click', function ( e ) {
			e.preventDefault();
			if ( ! window.wp || ! wp.media ) {
				return;
			}
			if ( ! frame ) {
				frame = wp.media( {
					title: i18n.chooseIcon || '',
					button: { text: i18n.useIcon || '' },
					library: { type: 'image' },
					multiple: false
				} );
				frame.on( 'select', function () {
					var attachment = frame.state().get( 'selection' ).first().toJSON();
					var url = attachment.url;
					if ( attachment.sizes && attachment.sizes.thumbnail && attachment.mime !== 'image/svg+xml' ) {
						url = attachment.sizes.thumbnail.url;
					}
					$( '#m365-icon-url' ).val( url ).trigger( 'input' );
				} );
			}
			frame.open();
		} );

		$( '#m365-icon-reset' ).on( 'click', function ( e ) {
			e.preventDefault();
			$( '#m365-icon-url' ).val( '' ).trigger( 'input' );
		} );

		/* ---------------- Auth method switch ---------------- */
		function applyMethod() {
			var method = $( 'input[name$="[auth_method]"]:checked' ).val() || 'secret';
			$( '.m365-method__option' ).removeClass( 'is-selected' ).filter( '[data-method="' + method + '"]' ).addClass( 'is-selected' );
			$( '.m365-auth-panel' ).removeClass( 'is-active' ).filter( '[data-method="' + method + '"]' ).addClass( 'is-active' );
		}
		$( 'input[name$="[auth_method]"]' ).on( 'change', applyMethod );
		applyMethod();

		/* ---------------- Certificate generation ---------------- */
		$( '#m365-cert-generate' ).on( 'click', function () {
			var $btn = $( this );
			var $out = $( '#m365-cert-result' );
			if ( $btn.data( 'replace' ) && ! window.confirm( i18n.confirmCert ) ) {
				return;
			}
			$btn.prop( 'disabled', true );
			$out.removeClass( 'is-success is-error' ).prop( 'hidden', false ).text( i18n.generating || '…' );

			$.post( cfg.ajaxUrl, { action: cfg.certAction, nonce: cfg.nonces.cert, op: 'generate' } ).done( function ( res ) {
				if ( res && res.success ) {
					$out.addClass( 'is-success' ).text( res.data.message );
					window.setTimeout( function () { window.location.reload(); }, 800 );
				} else {
					$out.addClass( 'is-error' ).text( ( res && res.data && res.data.message ) || i18n.testFailed );
					$btn.prop( 'disabled', false );
				}
			} ).fail( function () {
				$out.addClass( 'is-error' ).text( i18n.testFailed );
				$btn.prop( 'disabled', false );
			} );
		} );

		$( '#m365-cert-remove' ).on( 'change', function () {
			if ( this.checked && ! window.confirm( i18n.confirmCertRemove ) ) {
				this.checked = false;
			}
		} );

		$( '#m365-cert-paste-toggle' ).on( 'click', function ( e ) {
			e.preventDefault();
			$( '#m365-cert-paste' ).prop( 'hidden', function ( i, v ) { return ! v; } );
		} );

		/* ---------------- Secret visibility ---------------- */
		$( '.m365-toggle-secret' ).on( 'click', function () {
			var $input = $( '#m365-client-secret' );
			var show = 'password' === $input.attr( 'type' );
			$input.attr( 'type', show ? 'text' : 'password' );
			$( this ).find( '.dashicons' ).toggleClass( 'dashicons-visibility', ! show ).toggleClass( 'dashicons-hidden', show );
		} );

		/* ---------------- Copy redirect URI ---------------- */
		$( '.m365-copy__button' ).on( 'click', function () {
			var $btn = $( this );
			var text = $( '#' + $btn.data( 'copy' ) ).text();
			var done = function () {
				$btn.text( i18n.copied || 'Copied!' );
				window.setTimeout( function () {
					$btn.text( i18n.copy || 'Copy' );
				}, 1500 );
			};
			if ( navigator.clipboard && navigator.clipboard.writeText ) {
				navigator.clipboard.writeText( text ).then( done );
			} else {
				var $tmp = $( '<textarea>' ).val( text ).appendTo( 'body' ).select();
				try {
					document.execCommand( 'copy' );
				} catch ( e ) {}
				$tmp.remove();
				done();
			}
		} );

		/* ---------------- Entra group pickers ---------------- */
		var optionName = ( $( '#m365-tenant' ).attr( 'name' ) || '' ).replace( /\[tenant_id\]$/, '' );
		var guidPattern = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/;

		function escapeHtml( str ) {
			return $( '<div>' ).text( str || '' ).html();
		}

		$( '.m365-picker' ).each( function () {
			var $picker = $( this );
			var field = $picker.data( 'field' );
			var mode = $picker.data( 'mode' );
			var $list = $picker.find( '.m365-picker__list' );
			var $results = $picker.find( '.m365-picker__results' );
			var $query = $picker.find( '.m365-picker__query' );
			var base = optionName + '[' + field + ']';

			function refresh() {
				$list.toggleClass( 'is-empty', 0 === $list.children( 'li' ).length );
			}

			function has( id ) {
				return $list.find( 'li[data-id="' + id + '"]' ).length > 0;
			}

			function add( id, name ) {
				id = ( id || '' ).toLowerCase();
				if ( ! guidPattern.test( id ) || has( id ) ) {
					return;
				}
				var $li = $( '<li class="m365-group-chip">' ).attr( 'data-id', id );
				if ( 'roles' === mode ) {
					$li.addClass( 'm365-group-chip--role' );
					$li.append( $( '<button type="button" class="m365-group-chip__up">&uarr;</button>' ).attr( 'aria-label', i18n.moveUp || '' ) );
				}
				$li.append( $( '<span class="m365-group-chip__name">' ).text( name || id ) );
				$li.append( $( '<code class="m365-group-chip__id">' ).text( id ) );
				if ( 'roles' === mode ) {
					$li.append( '<span class="m365-group-chip__arrow" aria-hidden="true">&rarr;</span>' );
					var $select = $picker.find( '.m365-picker__role-template' ).clone();
					$select.removeClass( 'm365-picker__role-template' ).prop( 'hidden', false ).prop( 'disabled', false ).attr( 'name', base + '[' + id + '][role]' );
					$li.append( $select );
					$li.append( $( '<input type="hidden">' ).attr( 'name', base + '[' + id + '][name]' ).val( name || id ) );
				} else {
					$li.append( $( '<input type="hidden">' ).attr( 'name', base + '[' + id + ']' ).val( name || id ) );
				}
				$li.append( $( '<button type="button" class="m365-group-chip__remove">&times;</button>' ).attr( 'aria-label', i18n.remove || '' ) );
				$list.append( $li );
				refresh();
				markDirty();
			}

			$list.on( 'click', '.m365-group-chip__remove', function () {
				$( this ).closest( 'li' ).remove();
				refresh();
				markDirty();
			} );
			$list.on( 'click', '.m365-group-chip__up', function () {
				var $li = $( this ).closest( 'li' );
				$li.prev().before( $li );
				markDirty();
			} );
			refresh();

			function buildResult( g ) {
				var $row = $( '<div class="m365-group-result">' );
				var $meta = $( '<div class="m365-group-result__meta">' );
				$meta.append( $( '<strong>' ).text( g.name ) );
				if ( g.type ) {
					$meta.append( $( '<span class="m365-group-result__type">' ).text( g.type ) );
				}
				$meta.append( $( '<code>' ).text( g.id ) );
				if ( g.description ) {
					$meta.append( $( '<em>' ).text( g.description ) );
				}
				var $btn = $( '<button type="button" class="button button-small">' ).text( i18n.add ).on( 'click', function () {
					add( g.id, g.name );
					$( this ).prop( 'disabled', true );
				} );
				if ( has( ( g.id || '' ).toLowerCase() ) ) {
					$btn.prop( 'disabled', true );
				}
				return $row.append( $meta ).append( $btn );
			}

			function search() {
				var query = $.trim( $query.val() );
				$results.prop( 'hidden', false ).removeClass( 'is-error' ).html( '<p class="m365-group-results__status">' + escapeHtml( i18n.searching ) + '</p>' );

				$.post( cfg.ajaxUrl, {
					action: cfg.groupAction,
					nonce: cfg.nonces.groups,
					query: query
				} ).done( function ( res ) {
					if ( ! res || ! res.success ) {
						var msg = ( res && res.data && res.data.message ) || i18n.testFailed;
						$results.addClass( 'is-error' ).html( '<p class="m365-group-results__status">' + escapeHtml( msg ) + '</p>' );
						// Allow adding a pasted GUID even when Graph is unavailable.
						if ( /^[0-9a-f-]{36}$/i.test( query ) ) {
							$results.append( buildResult( { id: query, name: query, type: '', description: '' } ) );
						}
						return;
					}
					var groups = res.data.groups || [];
					if ( ! groups.length ) {
						$results.html( '<p class="m365-group-results__status">' + escapeHtml( i18n.noGroups ) + '</p>' );
						return;
					}
					$results.empty();
					$.each( groups, function ( i, g ) {
						$results.append( buildResult( g ) );
					} );
				} ).fail( function () {
					$results.addClass( 'is-error' ).html( '<p class="m365-group-results__status">' + escapeHtml( i18n.testFailed ) + '</p>' );
				} );
			}

			$picker.find( '.m365-picker__search' ).on( 'click', search );
			$query.on( 'keydown', function ( e ) {
				if ( 'Enter' === e.key ) {
					e.preventDefault();
					search();
				}
			} );
		} );

		/* ---------------- User sync ---------------- */
		var dirty = false;
		function markDirty() {
			dirty = true;
		}
		$( '.m365-admin__form' ).on( 'change input', ':input:not(.m365-picker__query)', markDirty );

		$( '.m365-sync-run' ).on( 'click', function () {
			var $btn = $( this );
			var op = $btn.data( 'op' );
			var $report = $( '#m365-sync-report' );

			if ( dirty && ! window.confirm( i18n.unsaved ) ) {
				return;
			}
			if ( 'live' === op && ! window.confirm( i18n.confirmSync ) ) {
				return;
			}

			$( '.m365-sync-run' ).prop( 'disabled', true );
			$report.html( $( '<p class="m365-inline-result">' ).text( i18n.syncRunning ) );

			$.post( cfg.ajaxUrl, { action: cfg.syncAction, nonce: cfg.nonces.sync, op: op } ).done( function ( res ) {
				if ( res && res.success ) {
					$report.html( res.data.html );
				} else {
					$report.html( $( '<p class="m365-inline-result is-error">' ).text( ( res && res.data && res.data.message ) || i18n.syncFailed ) );
				}
			} ).fail( function () {
				$report.html( $( '<p class="m365-inline-result is-error">' ).text( i18n.syncFailed ) );
			} ).always( function () {
				$( '.m365-sync-run' ).prop( 'disabled', false );
			} );
		} );

		/* ---------------- Fallback key ---------------- */
		$( '#m365-fallback-regenerate' ).on( 'change', function () {
			if ( this.checked && ! window.confirm( i18n.confirmKey ) ) {
				this.checked = false;
			}
		} );

		/* ---------------- Test tenant ---------------- */
		$( '#m365-test' ).on( 'click', function () {
			var $btn = $( this );
			var $out = $( '#m365-test-result' );
			var label = $btn.text();

			$btn.prop( 'disabled', true ).text( i18n.testing || '…' );
			$out.removeClass( 'is-success is-error' ).prop( 'hidden', true ).empty();

			$.post( cfg.ajaxUrl, {
				action: cfg.action,
				nonce: cfg.nonces.test,
				tenant: $( '#m365-tenant' ).val()
			} ).done( function ( res ) {
				if ( res && res.success ) {
					$out.addClass( 'is-success' ).text( res.data.message ).append( $( '<code>' ).text( res.data.issuer ) );
				} else {
					$out.addClass( 'is-error' ).text( ( res && res.data && res.data.message ) || i18n.testFailed || '' );
				}
			} ).fail( function () {
				$out.addClass( 'is-error' ).text( i18n.testFailed || '' );
			} ).always( function () {
				$btn.prop( 'disabled', false ).text( label );
				$out.prop( 'hidden', false );
			} );
		} );
	} );
}( jQuery ) );