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// Take a look at the license at the top of the repository in the LICENSE file.

use std::borrow::Borrow;

use crate::{prelude::*, Snapshot};
use glib::{translate::*, IntoGStr};

mod sealed {
    pub trait Sealed {}
    impl<T: super::IsA<super::Snapshot>> Sealed for T {}
}

pub trait SnapshotExtManual: sealed::Sealed + IsA<Snapshot> + 'static {
    /// Appends a stroked border rectangle inside the given @outline.
    ///
    /// The four sides of the border can have different widths and colors.
    /// ## `outline`
    /// the outline of the border
    /// ## `border_width`
    /// the stroke width of the border on
    ///   the top, right, bottom and left side respectively.
    /// ## `border_color`
    /// the color used on the top, right,
    ///   bottom and left side.
    #[doc(alias = "gtk_snapshot_append_border")]
    fn append_border(
        &self,
        outline: &gsk::RoundedRect,
        border_width: &[f32; 4],
        border_color: &[gdk::RGBA; 4],
    ) {
        unsafe {
            let border_color_ptr: Vec<gdk::ffi::GdkRGBA> =
                border_color.iter().map(|c| *c.to_glib_none().0).collect();
            ffi::gtk_snapshot_append_border(
                self.as_ref().to_glib_none().0,
                outline.to_glib_none().0,
                border_width,
                border_color_ptr.as_ptr() as *const _,
            )
        }
    }

    /// Inserts a debug node with a message.
    ///
    /// Debug nodes don't affect the rendering at all, but can be
    /// helpful in identifying parts of a render node tree dump,
    /// for example in the GTK inspector.
    /// ## `message`
    /// a printf-style format string
    #[doc(alias = "gtk_snapshot_push_debug")]
    fn push_debug(&self, message: impl IntoGStr) {
        unsafe {
            message.run_with_gstr(|message| {
                ffi::gtk_snapshot_push_debug(self.as_ref().to_glib_none().0, message.as_ptr())
            })
        }
    }
}

impl<O: IsA<Snapshot>> SnapshotExtManual for O {}

impl AsRef<Snapshot> for gdk::Snapshot {
    #[inline]
    fn as_ref(&self) -> &Snapshot {
        self.downcast_ref().unwrap()
    }
}

impl From<gdk::Snapshot> for Snapshot {
    #[inline]
    fn from(e: gdk::Snapshot) -> Snapshot {
        assert_initialized_main_thread!();
        e.downcast().unwrap()
    }
}

impl Borrow<Snapshot> for gdk::Snapshot {
    #[inline]
    fn borrow(&self) -> &Snapshot {
        self.downcast_ref().unwrap()
    }
}

unsafe impl IsA<Snapshot> for gdk::Snapshot {}