Weird light fixture wiring

I went to go change out a light fixture today and it seems like two white cables we’re connecting to the light fixture after I took it down it seems like the black cables were tied together and the grounds were tied together inside the ceiling box.It also look like there were some red cables in the ceiling box too.

Does anyone have a clue on how this was wired? There are two light switches for this fixture.

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Weird light fixture wiring