Zoroastrianism is a religion and philosophy, founded by Zoraster in ancient Iran. It was the one of the first religions to have the good/evil things, which branched off to other religions, like Judaism, Christianity, and Islam. The good god in Zoroastrianism is called Ahura Mazda and fire is venerated as a supposed pure element representing divine wisdom. There is also an evil force known as Angra Mainyu that will later be defeated.
Zorastrians emphasize high moral standards which they hope will help defeat the forces of evil.
Zoroastrianism predates Christianity and the concept of a battle between God and Satan in Christianity is unoriginal.