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// MIT/Apache2 License

#![cfg(feature = "randr")]

use super::auto::{
    randr::{
        CrtcChange, LeaseNotify, OutputChange, OutputProperty, ProviderChange, ProviderProperty,
        ResourceChange,
    },
    AsByteSequence,
};

const NOTIFY_DATA_LEN: usize = 28;

/// Notification data.
#[derive(Debug, Clone, Copy, Default, PartialOrd, Ord, PartialEq, Eq, Hash)]
#[repr(transparent)]
pub struct NotifyData([u8; NOTIFY_DATA_LEN]);

impl AsByteSequence for NotifyData {
    #[inline]
    fn size(&self) -> usize {
        NOTIFY_DATA_LEN
    }

    #[inline]
    fn as_bytes(&self, bytes: &mut [u8]) -> usize {
        (&mut bytes[..NOTIFY_DATA_LEN]).copy_from_slice(&self.0);
        NOTIFY_DATA_LEN
    }

    #[inline]
    fn from_bytes(bytes: &[u8]) -> Option<(Self, usize)> {
        let mut data = Self([0; NOTIFY_DATA_LEN]);
        data.0.copy_from_slice(&bytes[..NOTIFY_DATA_LEN]);
        Some((data, NOTIFY_DATA_LEN))
    }
}

impl NotifyData {
    #[inline]
    pub fn as_crtc_change(&self) -> Option<CrtcChange> {
        Some(CrtcChange::from_bytes(&self.0)?.0)
    }

    #[inline]
    pub fn into_crtc_change(self) -> Option<CrtcChange> {
        self.as_crtc_change()
    }

    #[inline]
    pub fn as_output_change(&self) -> Option<OutputChange> {
        Some(OutputChange::from_bytes(&self.0)?.0)
    }

    #[inline]
    pub fn into_output_change(self) -> Option<OutputChange> {
        self.as_output_change()
    }

    #[inline]
    pub fn as_output_property(&self) -> Option<OutputProperty> {
        Some(OutputProperty::from_bytes(&self.0)?.0)
    }

    #[inline]
    pub fn into_output_property(self) -> Option<OutputProperty> {
        self.as_output_property()
    }

    #[inline]
    pub fn as_provider_change(&self) -> Option<ProviderChange> {
        Some(ProviderChange::from_bytes(&self.0)?.0)
    }

    #[inline]
    pub fn into_provider_change(self) -> Option<ProviderChange> {
        self.as_provider_change()
    }

    #[inline]
    pub fn as_provider_property(&self) -> Option<ProviderProperty> {
        Some(ProviderProperty::from_bytes(&self.0)?.0)
    }

    #[inline]
    pub fn into_provider_property(self) -> Option<ProviderProperty> {
        self.as_provider_property()
    }

    #[inline]
    pub fn as_resource_change(&self) -> Option<ResourceChange> {
        Some(ResourceChange::from_bytes(&self.0)?.0)
    }

    #[inline]
    pub fn into_resource_change(self) -> Option<ResourceChange> {
        self.as_resource_change()
    }

    #[inline]
    pub fn as_lease_notify(&self) -> Option<LeaseNotify> {
        Some(LeaseNotify::from_bytes(&self.0)?.0)
    }

    #[inline]
    pub fn into_lease_notify(self) -> Option<LeaseNotify> {
        self.as_lease_notify()
    }
}