Dinky

Hey I'm having some bike trouble, I broke down 2 days ago bike but shut down mid ride wouldn't start up again, got it home it started on the kick start but wouldn't idle, I tried it about an hour ago and it started and idled and rode, I changed the oil in it and it will not start period as if battery is dead but I've had it on the charger, it's not dead, I'm thinking could be not getting a spark? I don't know much about mechanically, any help would be amazing the bike is a YAMAHA YBR 125 07.