/* eslint-disable @typescript-eslint/ban-types */
import type { CSSProperties } from "react";

import { UI, DayFlag, SelectionState } from "../UI.js";
import * as components from "../components/custom-components.js";
import {
  formatCaption,
  formatDay,
  formatMonthCaption,
  formatMonthDropdown,
  formatWeekdayName,
  formatWeekNumber,
  formatYearCaption,
  formatYearDropdown
} from "../formatters/index.js";
import {
  labelDayButton,
  labelNav,
  labelGrid,
  labelGridcell,
  labelMonthDropdown,
  labelNext,
  labelPrevious,
  labelWeekday,
  labelWeekNumber,
  labelWeekNumberHeader,
  labelYearDropdown
} from "../labels/index.js";
import { dateLib } from "../lib/index.js";

/**
 * Selection modes supported by DayPicker.
 *
 * - `single`: use DayPicker to select single days.
 * - `multiple`: allow selecting multiple days.
 * - `range`: use DayPicker to select a range of days.
 *
 * @see https://daypicker.dev/docs/selection-modes
 */
export type Mode = "single" | "multiple" | "range";

/**
 * The components that can be changed using the `components` prop.
 *
 * @see https://daypicker.dev/guides/custom-components
 */
export type CustomComponents = {
  /** Render any button element in DayPicker. */
  Button: typeof components.Button;
  /** Render the chevron icon used in the navigation buttons and dropdowns. */
  Chevron: typeof components.Chevron;
  /** Render the caption label of the month grid. */
  CaptionLabel: typeof components.CaptionLabel;
  /** Render the day cell in the month grid. */
  Day: typeof components.Day;
  /** Render the button containing the day in the day cell. */
  DayButton: typeof components.DayButton;
  /** Render the dropdown element to select years and months. */
  Dropdown: typeof components.Dropdown;
  /** Render the container of the dropdowns. */
  DropdownNav: typeof components.DropdownNav;
  /** Render the footer element announced by screen readers. */
  Footer: typeof components.Footer;
  /** Render the container of the MonthGrid. */
  Month: typeof components.Month;
  /** Render the caption of the month grid. */
  MonthCaption: typeof components.MonthCaption;
  /** Render the grid of days in a month. */
  MonthGrid: typeof components.MonthGrid;
  /** Wrapper of the month grids. */
  Months: typeof components.Months;
  /** Render the navigation element with the next and previous buttons. */
  Nav: typeof components.Nav;
  /** Render the `<option>` HTML element in the dropdown. */
  Option: typeof components.Option;
  /** Render the root element of the calendar. */
  Root: typeof components.Root;
  /** Render the select element in the dropdowns. */
  Select: typeof components.Select;
  /** Render the weeks section in the month grid. */
  Weeks: typeof components.Weeks;
  /** Render the week rows. */
  Week: typeof components.Week;
  /** Render the weekday name in the header. */
  Weekday: typeof components.Weekday;
  /** Render the row containing the week days. */
  Weekdays: typeof components.Weekdays;
  /** Render the cell with the number of the week. */
  WeekNumber: typeof components.WeekNumber;
  /** Render the header of the week number column. */
  WeekNumberHeader: typeof components.WeekNumberHeader;
};

/** @private */
export type DateLib = typeof dateLib;

/** Represent a map of formatters used to render localized content. */
export type Formatters = {
  /** Format the caption of a month grid. */
  formatCaption: typeof formatCaption;
  /** @deprecated Use {@link Formatters.formatCaption} instead. */
  formatMonthCaption: typeof formatMonthCaption;
  /** Format the label in the month dropdown. */
  formatMonthDropdown: typeof formatMonthDropdown;
  /** @deprecated Use {@link Formatters.formatYearDropdown} instead. */
  formatYearCaption: typeof formatYearCaption;
  /** Format the label in the year dropdown. */
  formatYearDropdown: typeof formatYearDropdown;
  /** Format the day in the day cell. */
  formatDay: typeof formatDay;
  /** Format the week number. */
  formatWeekNumber: typeof formatWeekNumber;
  /** Format the week day name in the header. */
  formatWeekdayName: typeof formatWeekdayName;
};

/** Map of functions to translate ARIA labels for the relative elements. */
export type Labels = {
  /** The label for the navigation toolbar. */
  labelNav: typeof labelNav;
  /** The label for the month grid. */
  labelGrid: typeof labelGrid;
  /** The label for the gridcell, when the calendar is not interactive. */
  labelGridcell: typeof labelGridcell;
  /** The label for the month dropdown. */
  labelMonthDropdown: typeof labelMonthDropdown;
  /** The label for the year dropdown. */
  labelYearDropdown: typeof labelYearDropdown;
  /** The label for the "next month" button. */
  labelNext: typeof labelNext;
  /** The label for the "previous month" button. */
  labelPrevious: typeof labelPrevious;
  /** The label for the day button.. */
  labelDayButton: typeof labelDayButton;
  /** @deprecated Use {@link labelDayButton} instead. */
  labelDay: typeof labelDayButton;
  /** The label for the weekday. */
  labelWeekday: typeof labelWeekday;
  /** The label for the week number. */
  labelWeekNumber: typeof labelWeekNumber;
  /**
   * Return the label for the column of the week number.
   *
   * @since 9.0.0
   */
  labelWeekNumberHeader: typeof labelWeekNumberHeader;
};

/**
 * A value or a function that matches a specific day.
 *
 * @example
 *   // will always match the day
 *   const booleanMatcher: Matcher = true;
 *
 *   // will match the today's date
 *   const dateMatcher: Matcher = new Date();
 *
 *   // will match the days in the array
 *   const arrayMatcher: Matcher = [
 *     new Date(2019, 1, 2),
 *     new Date(2019, 1, 4)
 *   ];
 *
 *   // will match days after the 2nd of February 2019
 *   const afterMatcher: DateAfter = { after: new Date(2019, 1, 2) };
 *
 *   // will match days before the 2nd of February 2019 }
 *   const beforeMatcher: DateBefore = { before: new Date(2019, 1, 2) };
 *
 *   // will match Sundays
 *   const dayOfWeekMatcher: DayOfWeek = {
 *     dayOfWeek: 0
 *   };
 *
 *   // will match the included days, except the two dates
 *   const intervalMatcher: DateInterval = {
 *     after: new Date(2019, 1, 2),
 *     before: new Date(2019, 1, 5)
 *   };
 *
 *   // will match the included days, including the two dates
 *   const rangeMatcher: DateRange = {
 *     from: new Date(2019, 1, 2),
 *     to: new Date(2019, 1, 5)
 *   };
 *
 *   // will match when the function return true
 *   const functionMatcher: Matcher = (day: Date) => {
 *     return day.getMonth() === 2; // match when month is March
 *   };
 */
export type Matcher =
  | boolean
  | ((date: Date) => boolean)
  | Date
  | Date[]
  | DateRange
  | DateBefore
  | DateAfter
  | DateInterval
  | DayOfWeek;

/**
 * Match a day falling after the specified date, with the date not included.
 *
 * @example
 *   // Match days after the 2nd of February 2019
 *   const matcher: DateAfter = { after: new Date(2019, 1, 2) };
 */
export type DateAfter = { after: Date };

/**
 * Match a day falling before the specified date, with the date not included.
 *
 * @example
 *   // Match days before the 2nd of February 2019
 *   const matcher: DateBefore = { before: new Date(2019, 1, 2) };
 */
export type DateBefore = { before: Date };

/**
 * An interval of dates. Differently from {@link DateRange}, the range ends here
 * are not included.
 *
 * @example
 *   // Match the days between the 2nd and the 5th of February 2019
 *   const matcher: DateInterval = {
 *     after: new Date(2019, 1, 2),
 *     before: new Date(2019, 1, 5)
 *   };
 */
export type DateInterval = { before: Date; after: Date };

/**
 * A range of dates. The range can be open. Differently from
 * {@link DateInterval}, the range ends here are included.
 *
 * @example
 *   // Match the days between the 2nd and the 5th of February 2019
 *   const matcher: DateRange = {
 *     from: new Date(2019, 1, 2),
 *     to: new Date(2019, 1, 5)
 *   };
 */
export type DateRange = { from: Date | undefined; to?: Date | undefined };

/**
 * Match dates being one of the specified days of the week (`0-6`, where `0` is
 * Sunday).
 *
 * @example
 *   // Match Sundays
 *   const matcher: DayOfWeek = { dayOfWeek: 0 };
 *   // Match weekends
 *   const matcher: DayOfWeek = { dayOfWeek: [0, 6] };
 */
export type DayOfWeek = { dayOfWeek: number | number[] };

/**
 * The event handler triggered when clicking or interacting with a day.
 *
 * @template EventType - The event type that triggered the event (e.g.
 *   `React.MouseEvent`, `React.KeyboardEvent`, etc.).
 * @param date - The date that has triggered the event.
 * @param modifiers - The modifiers belonging to the date.
 * @param e - The DOM event that triggered the event.
 */
export type DayEventHandler<EventType> = (
  date: Date,
  modifiers: Modifiers,
  e: EventType
) => void;

/**
 * The event handler when a month is changed in the calendar.
 *
 * ```tsx
 * <DayPicker onMonthChange={(month) => console.log(month)} />
 * ```
 *
 * @see https://daypicker.dev/docs/navigation
 */
export type MonthChangeEventHandler = (month: Date) => void;

/**
 * The CSS classnames to use for the {@link UI} elements, the
 * {@link SelectionState} and the {@link DayFlag}.
 *
 * @example
 *   const classNames: ClassNames = {
 *     [UI.Root]: "root",
 *     [UI.Outside]: "outside",
 *     [UI.Nav]: "nav"
 *     // etc.
 *   };
 */
export type ClassNames = {
  [key in UI | SelectionState | DayFlag]: string;
};

/**
 * The CSS styles to use for the {@link UI} elements, the {@link SelectionState}
 * and the {@link DayFlag}.
 */
export type Styles = {
  [key in UI | SelectionState | DayFlag]: CSSProperties | undefined;
};

/**
 * The modifiers that are matching a day in the calendar.
 *
 * @example
 *   const modifiers: Modifiers = {
 *     today: false, // the day is not today
 *     selected: true, // the day is selected
 *     weekend: false // the day is not in the weekend
 *     // etc
 *   };
 */
export type Modifiers = Record<string, boolean>;

/**
 * The style to apply to each day element matching a modifier.
 *
 * @example
 *   const modifiersStyles: ModifiersStyles = {
 *     today: { color: "red" },
 *     selected: { backgroundColor: "blue" },
 *     weekend: { color: "green" }
 *   };
 */
export type ModifiersStyles = Record<string, CSSProperties>;

/**
 * The classnames to assign to each day element matching a modifier.
 *
 * @example
 *   const modifiersClassNames: ModifiersClassNames = {
 *     today: "today", // Use the "today" class for the today's day
 *     selected: "highlight", // Use the "highlight" class for the selected day
 *     weekend: "weekend" // Use the "weekend" class for the weekend days
 *   };
 */
export type ModifiersClassNames = Record<string, string>;

/**
 * The props that have been deprecated since version 9.0.0.
 *
 * @private
 * @since 9.0.0
 * @see https://daypicker.dev/upgrading
 */
export type V9DeprecatedProps =
  /** Use `hidden` prop instead. */
  | "fromDate"
  /** Use `hidden` prop instead. */
  | "toDate"
  /** Use `startMonth` instead. */
  | "fromMonth"
  /** Use `endMonth` instead. */
  | "toMonth"
  /** Use `startMonth` instead. */
  | "fromYear"
  /** Use `endMonth` instead. */
  | "toYear";

/** The direction to move the focus relative to the current focused date. */
export type MoveFocusDir = "after" | "before";

/** The temporal unit to move the focus by. */
export type MoveFocusBy =
  | "day"
  | "week"
  | "startOfWeek"
  | "endOfWeek"
  | "month"
  | "year";