Power BI Dynamic Title - how to return "All" if all slicer options are selected

The Title I want is: when I select every province, the title would show the same as nothing selected.

For example, when nothing is selected, the title looks like this: Weekly Report - All Provinces:

If I select everything, right now the title looks like this:

But I want it return the same as above: "Weekly Report - All Provinces"

The measure I created:

Title =
"Weekly Report - "
    & IF (
        NOT ( ISFILTERED ( DIMENSION[Province] ) ),
        "All Provinces",
        IF (
            ISFILTERED ( DIMENSION[Province] ),
            CONCATENATEX ( VALUES ( DIMENSION[Province] ), DIMENSION[Province], "," )
        )
    )

Can someone kindly take a look and help me fix this? Thanks so much in advance!!

Solution

Title =
var province_list= IF(
    ISFILTERED('Dimension'[Province]),
    CONCATENATEX(
        VALUES('Dimension'[Province]),
        'Dimension'[Province], ", "
    ),
    "All Provinces"
)
var distinct_count = CALCULATE(DISTINCTCOUNT('Dimension'[Province]), ALL('Dimension'[Province]))
var comma_count = LEN(province_list) - LEN(SUBSTITUTE(province_list, ",", ""))


return
    SWITCH(
        TRUE(),
        comma_count = 0 && province_list = "All Provinces", "Weekly Report - All Provinces",
        comma_count + 1 = distinct_count, "Weekly Report - All Provinces",
        "Weekly Report - " & province_list
    )