import 'package:flutter_cupertino_date_picker/flutter_cupertino_date_picker.dart';

/// Display date picker in bottom sheet.
///
/// context: [BuildContext]
/// minDateTime: [DateTime] minimum date time
/// maxDateTime: [DateTime] maximum date time
/// initialDateTime: [DateTime] initial date time for selected
/// dateFormat: [String] date format pattern
/// locale: [DateTimePickerLocale] internationalization
/// pickerMode: [DateTimePickerMode] display mode: date(DatePicker)、time(TimePicker)、datetime(DateTimePicker)
/// pickerTheme: [DateTimePickerTheme] the theme of date time picker
/// onCancel: [DateVoidCallback] pressed title cancel widget event
/// onClose: [DateVoidCallback] date picker closed event
/// onChange: [DateValueCallback] selected date time changed event
/// onConfirm: [DateValueCallback] pressed title confirm widget event
DatePicker.showDatePicker(
  BuildContext context,
  DateTime minDateTime,
  DateTime maxDateTime,
  DateTime initialDateTime,
  String dateFormat,
  DateTimePickerLocale locale: DATETIME_PICKER_LOCALE_DEFAULT,
  DateTimePickerMode pickerMode: DateTimePickerMode.date,
  DateTimePickerTheme pickerTheme: DatePickerTheme.Default,
  DateVoidCallback onCancel,
  DateVoidCallback onClose,
  DateValueCallback onChange,
  DateValueCallback onConfirm,
});

/// Display date picker widget.
///
/// minDateTime: [DateTime] minimum date time
/// maxDateTime: [DateTime] maximum date time
/// initialDateTime: [DateTime] initial date time for selected
/// dateFormat: [String] date format pattern
/// locale: [DateTimePickerLocale] internationalization
/// pickerTheme: [DateTimePickerTheme] the theme of date time picker
/// onCancel: [DateVoidCallback] pressed title cancel widget event
/// onChange: [DateValueCallback] selected date time changed event
/// onConfirm: [DateValueCallback] pressed title confirm widget event
DatePickerWidget({
  DateTime minDateTime,
  DateTime maxDateTime,
  DateTime initialDateTime,
  String dateFormat: DATETIME_PICKER_DATE_FORMAT,
  DateTimePickerLocale locale: DATETIME_PICKER_LOCALE_DEFAULT,
  DateTimePickerTheme pickerTheme: DatePickerTheme.Default,
  DateVoidCallback onCancel,
  DateValueCallback onChange,
  DateValueCallback onConfirm,
})

/// Display time picker widget.
///
/// minDateTime: [DateTime] minimum date time
/// maxDateTime: [DateTime] maximum date time
/// initialDateTime: [DateTime] initial date time for selected
/// dateFormat: [String] date format pattern
/// locale: [DateTimePickerLocale] internationalization
/// pickerTheme: [DateTimePickerTheme] the theme of date time picker
/// minuteDivider: [int] minute restriction, e.g. 5: every 5th minute will be shown (0, 5, 10, 15 ...)
/// onCancel: [DateVoidCallback] pressed title cancel widget event
/// onChange: [DateValueCallback] selected date time changed event
/// onConfirm: [DateValueCallback] pressed title confirm widget event
TimePickerWidget({
  DateTime minDateTime,
  DateTime maxDateTime,
  DateTime initialDateTime,
  String dateFormat: DATETIME_PICKER_DATE_FORMAT,
  DateTimePickerLocale locale: DATETIME_PICKER_LOCALE_DEFAULT,
  DateTimePickerTheme pickerTheme: DatePickerTheme.Default,
  int minuteDivider: 1,
  DateVoidCallback onCancel,
  DateValueCallback onChange,
  DateValueCallback onConfirm,
})

/// Display date time picker widget.
///
/// minDateTime: [DateTime] minimum date time
/// maxDateTime: [DateTime] maximum date time
/// initialDateTime: [DateTime] initial date time for selected
/// dateFormat: [String] date format pattern
/// locale: [DateTimePickerLocale] internationalization
/// pickerTheme: [DateTimePickerTheme] the theme of date time picker
/// onCancel: [DateVoidCallback] pressed title cancel widget event
/// onChange: [DateValueCallback] selected date time changed event
/// onConfirm: [DateValueCallback] pressed title confirm widget event
DateTimePickerWidget({
  DateTime minDateTime,
  DateTime maxDateTime,
  DateTime initialDateTime,
  String dateFormat: DATETIME_PICKER_DATE_FORMAT,
  DateTimePickerLocale locale: DATETIME_PICKER_LOCALE_DEFAULT,
  DateTimePickerTheme pickerTheme: DatePickerTheme.Default,
  DateVoidCallback onCancel,
  DateValueCallback onChange,
  DateValueCallback onConfirm,
})

/// English (EN) United States
class _StringsEnUs extends _StringsI18n {
  const _StringsEnUs();

  @override
  String getCancelText() {
    // TODO return cancel widget's text
    return null;
  }

  @override
  String getDoneText() {
    // TODO return done widget's text
    return null;
  }

  @override
  List<String> getMonths() {
    // TODO return the array of month's full name [January, February ... December]
    return null;
  }

  @override
  List<String> getMonthsShort() {
    // TODO return the array of month's short name [Jan, Feb ... Dec]. If return null, will substring the full name (max length is 3)
    return null;
  }

  @override
  List<String> getWeeksFull() {
    // TODO return the array of week's full name [Monday, Tuesday ... Sunday]
    return null;
  }

  @override
  List<String> getWeeksShort() {
    // TODO return the array of week's short name [Mon, Tue ... Sun]
    return null;
  }
}

enum DateTimePickerLocale {
  /// English (EN) United States
  en_us,
}

const Map<DateTimePickerLocale, _StringsI18n> datePickerI18n = {
  DateTimePickerLocale.en_us: const _StringsEnUs(),
};

/// DateTimePicker theme.
///
/// [backgroundColor] DatePicker's background color.
/// [cancelTextStyle] Default cancel widget's [TextStyle].
/// [confirmTextStyle] Default confirm widget's [TextStyle].
/// [cancel] Custom cancel widget.
/// [confirm] Custom confirm widget.
/// [title] Custom title widget. If specify a title widget, the cancel and confirm widgets will not display. Must set [titleHeight] value for custom title widget.
/// [showTitle] Whether display title widget or not. If set false, the default cancel and confirm widgets will not display, but the custom title widget will display if had specified one custom title widget.
/// [pickerHeight] The value of DatePicker's height.
/// [titleHeight] The value of DatePicker's title height.
/// [itemHeight] The value of DatePicker's column height.
/// [itemTextStyle] The value of DatePicker's column [TextStyle].
const DateTimePickerTheme({
  this.backgroundColor: DATETIME_PICKER_BACKGROUND_COLOR,
  this.cancelTextStyle,
  this.confirmTextStyle,
  this.cancel,
  this.confirm,
  this.title,
  this.showTitle: DATETIME_PICKER_SHOW_TITLE_DEFAULT,
  this.pickerHeight: DATETIME_PICKER_HEIGHT,
  this.titleHeight: DATETIME_PICKER_TITLE_HEIGHT,
  this.itemHeight: DATETIME_PICKER_ITEM_HEIGHT,
  this.itemTextStyle: DATETIME_PICKER_ITEM_TEXT_STYLE,
});