use crate::platform::RuntimePlatform;
use crate::vm_fault::VmFault;

pub struct HostContext<'a> {
    pub platform: Option<&'a mut dyn RuntimePlatform>,
}

impl<'a> HostContext<'a> {
    pub fn new(platform: Option<&'a mut dyn RuntimePlatform>) -> Self {
        Self { platform }
    }

    pub fn new_platform(platform: Option<&'a mut dyn RuntimePlatform>) -> Self {
        Self::new(platform)
    }

    #[inline]
    pub fn require_platform(&mut self) -> Result<&mut dyn RuntimePlatform, VmFault> {
        match &mut self.platform {
            Some(platform) => Ok(*platform),
            None => Err(VmFault::Unavailable),
        }
    }
}

pub trait HostContextProvider {
    fn make_ctx(&'_ mut self) -> HostContext<'_>;
}