PowerBI Embed Basic Information

Hi Guy's

I need info about PowerBI embed.

1. Embed Support Import/DirectQuery or both or is there any restrictions for data source ?

2. on which license based embed work ?(we have premium license, but i heard embed working on pro license only. i confused total

3. If import mode support, is it possible for refreshing the data through gateway?

4. which language more comfortble in embed (.net,Javascript) ?

5. Types of embed reports (like sharepoint, saleforce ...)

6. I need from scratch what are all steps follow embed ?

please share any info related to powerbi embed.

regards,

Naveen