While trying to insert record into databse from recyclebin:

For ex:
I have contact record in my salesforce and i have deleted that contact record, that stored in recyclebin.

After deleting the contact record, i have created new record in contact object (as it is deleted contact record has information like, first name, last name, email previously deleted record from contact).

i have written a trigger for contact object, that is while inserting new contact fire error, if first name, last name, email is there.

my question is.... Can i restore the contact record from recyclebin already existing same details in contact object?

In that time, trigger will fire or not?

How to write trigger to restore from recyclebin?

which context variable can i have to use?

Please help me out... Thanks in advance