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

use std::fmt;

use glib::translate::*;

use crate::{Vec2, Vec3, Vec4};

impl Vec4 {
    /// Initializes a [`Vec4`][crate::Vec4] using the given values.
    ///
    /// This function can be called multiple times.
    /// ## `x`
    /// the X field of the vector
    /// ## `y`
    /// the Y field of the vector
    /// ## `z`
    /// the Z field of the vector
    /// ## `w`
    /// the W field of the vector
    ///
    /// # Returns
    ///
    /// a pointer to the initialized
    ///  vector
    #[doc(alias = "graphene_vec4_init")]
    pub fn new(x: f32, y: f32, z: f32, w: f32) -> Self {
        assert_initialized_main_thread!();
        unsafe {
            let mut vec = Self::uninitialized();
            ffi::graphene_vec4_init(vec.to_glib_none_mut().0, x, y, z, w);
            vec
        }
    }

    /// Initializes a [`Vec4`][crate::Vec4] using the components of a
    /// [`Vec2`][crate::Vec2] and the values of `z` and `w`.
    /// ## `src`
    /// a [`Vec2`][crate::Vec2]
    /// ## `z`
    /// the value for the third component of `self`
    /// ## `w`
    /// the value for the fourth component of `self`
    ///
    /// # Returns
    ///
    /// the initialized vector
    #[doc(alias = "graphene_vec4_init_from_vec2")]
    #[doc(alias = "init_from_vec2")]
    pub fn from_vec2(src: &Vec2, z: f32, w: f32) -> Self {
        assert_initialized_main_thread!();
        unsafe {
            let mut vec = Self::uninitialized();
            ffi::graphene_vec4_init_from_vec2(vec.to_glib_none_mut().0, src.to_glib_none().0, z, w);
            vec
        }
    }

    /// Initializes a [`Vec4`][crate::Vec4] using the components of a
    /// [`Vec3`][crate::Vec3] and the value of `w`.
    /// ## `src`
    /// a [`Vec3`][crate::Vec3]
    /// ## `w`
    /// the value for the fourth component of `self`
    ///
    /// # Returns
    ///
    /// the initialized vector
    #[doc(alias = "graphene_vec4_init_from_vec3")]
    #[doc(alias = "init_from_vec3")]
    pub fn from_vec3(src: &Vec3, w: f32) -> Self {
        assert_initialized_main_thread!();
        unsafe {
            let mut vec = Self::uninitialized();
            ffi::graphene_vec4_init_from_vec3(vec.to_glib_none_mut().0, src.to_glib_none().0, w);
            vec
        }
    }

    /// Initializes a [`Vec4`][crate::Vec4] with the values inside the given array.
    /// ## `src`
    /// an array of four floating point values
    ///
    /// # Returns
    ///
    /// the initialized vector
    #[doc(alias = "graphene_vec4_init_from_float")]
    #[doc(alias = "init_from_float")]
    pub fn from_float(src: [f32; 4]) -> Self {
        assert_initialized_main_thread!();
        unsafe {
            let mut vec = Self::uninitialized();
            ffi::graphene_vec4_init_from_float(vec.to_glib_none_mut().0, src.as_ptr() as *const _);
            vec
        }
    }

    /// Stores the components of the given [`Vec4`][crate::Vec4] into an array
    /// of floating point values.
    ///
    /// # Returns
    ///
    ///
    /// ## `dest`
    /// return location for
    ///  an array of floating point values
    #[doc(alias = "graphene_vec4_to_float")]
    pub fn to_float(&self) -> [f32; 4] {
        unsafe {
            let mut out = std::mem::MaybeUninit::uninit();
            ffi::graphene_vec4_to_float(self.to_glib_none().0, out.as_mut_ptr());
            out.assume_init()
        }
    }
}

impl fmt::Debug for Vec4 {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("Vec4")
            .field("x", &self.x())
            .field("y", &self.y())
            .field("z", &self.z())
            .field("w", &self.w())
            .finish()
    }
}

impl Default for Vec4 {
    fn default() -> Self {
        Self::zero()
    }
}