Chore: Type improvements (#93267)

* some type fixes + ignore graveyard folder

* few more fixes

* remove comment

* ignore global styles

* few more type fixes

packages/grafana-data/src/datetime/datemath.ts

@@ -2,7 +2,15 @@ import { includes, isDate } from 'lodash';
 
 import { TimeZone } from '../types/time';
 
-import { DateTime, dateTime, dateTimeForTimeZone, DurationUnit, isDateTime, ISO_8601 } from './moment_wrapper';
+import {
+  DateTime,
+  dateTime,
+  dateTimeAsMoment,
+  dateTimeForTimeZone,
+  DurationUnit,
+  isDateTime,
+  ISO_8601,
+} from './moment_wrapper';
 
 const units: DurationUnit[] = ['y', 'M', 'w', 'd', 'h', 'm', 's', 'Q'];
 
@@ -51,10 +59,10 @@ export function parse(
     // We got some non string which is not a moment nor Date. TS should be able to check for that but not always.
     return undefined;
   } else {
-    let time;
+    let time: DateTime;
     let mathString = '';
-    let index;
-    let parseString;
+    let index = -1;
+    let parseString = '';
 
     if (text.substring(0, 3) === 'now') {
       time = dateTimeForTimeZone(timezone);
@@ -104,10 +112,9 @@ export function isValid(text: string | DateTime): boolean {
  * @param time
  * @param roundUp If true it will round the time to endOf time unit, otherwise to startOf time unit.
  */
-// TODO: Had to revert Andrejs `time: moment.Moment` to `time: any`
 export function parseDateMath(
   mathString: string,
-  time: any,
+  time: DateTime,
   roundUp?: boolean,
   fiscalYearStartMonth = 0
 ): DateTime | undefined {
@@ -187,21 +194,21 @@ export function parseDateMath(
   return result;
 }
 
-export function roundToFiscal(fyStartMonth: number, dateTime: any, unit: string, roundUp: boolean | undefined) {
+export function roundToFiscal(fyStartMonth: number, dateTime: DateTime, unit: string, roundUp: boolean | undefined) {
   switch (unit) {
     case 'y':
       if (roundUp) {
-        roundToFiscal(fyStartMonth, dateTime, unit, false).add(11, 'M').endOf('M');
+        roundToFiscal(fyStartMonth, dateTime, unit, false)?.add(11, 'M').endOf('M');
       } else {
-        dateTime.subtract((dateTime.month() - fyStartMonth + 12) % 12, 'M').startOf('M');
+        dateTime.subtract((dateTimeAsMoment(dateTime).month() - fyStartMonth + 12) % 12, 'M').startOf('M');
       }
       return dateTime;
     case 'Q':
       if (roundUp) {
-        roundToFiscal(fyStartMonth, dateTime, unit, false).add(2, 'M').endOf('M');
+        roundToFiscal(fyStartMonth, dateTime, unit, false)?.add(2, 'M').endOf('M');
       } else {
         // why + 12? to ensure this number is always a positive offset from fyStartMonth
-        dateTime.subtract((dateTime.month() - fyStartMonth + 12) % 3, 'M').startOf('M');
+        dateTime.subtract((dateTimeAsMoment(dateTime).month() - fyStartMonth + 12) % 3, 'M').startOf('M');
       }
       return dateTime;
     default: