// Copyright 2021 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

use crate::{
    core::{Core, ObjectRef, OnAdded, Property},
    math,
    shapes::{CubicVertex, PathVertex},
};

#[derive(Debug, Default)]
pub struct CubicDetachedVertex {
    cubic_vertex: CubicVertex,
    in_rotation: Property<f32>,
    in_distance: Property<f32>,
    out_rotation: Property<f32>,
    out_distance: Property<f32>,
}

impl ObjectRef<'_, CubicDetachedVertex> {
    pub fn in_rotation(&self) -> f32 {
        self.in_rotation.get()
    }

    pub fn set_in_rotation(&self, in_rotation: f32) {
        if self.in_rotation() == in_rotation {
            return;
        }

        self.in_rotation.set(in_rotation);

        self.cast::<CubicVertex>().invalidate_in();
        self.cast::<PathVertex>().mark_path_dirty();
    }

    pub fn in_distance(&self) -> f32 {
        self.in_distance.get()
    }

    pub fn set_in_distance(&self, in_distance: f32) {
        if self.in_distance() == in_distance {
            return;
        }

        self.in_distance.set(in_distance);

        self.cast::<CubicVertex>().invalidate_in();
        self.cast::<PathVertex>().mark_path_dirty();
    }

    pub fn out_rotation(&self) -> f32 {
        self.out_rotation.get()
    }

    pub fn set_out_rotation(&self, out_rotation: f32) {
        if self.out_rotation() == out_rotation {
            return;
        }

        self.out_rotation.set(out_rotation);

        self.cast::<CubicVertex>().invalidate_out();
        self.cast::<PathVertex>().mark_path_dirty();
    }

    pub fn out_distance(&self) -> f32 {
        self.out_distance.get()
    }

    pub fn set_out_distance(&self, out_distance: f32) {
        if self.out_distance() == out_distance {
            return;
        }

        self.out_distance.set(out_distance);

        self.cast::<CubicVertex>().invalidate_out();
        self.cast::<PathVertex>().mark_path_dirty();
    }
}

impl ObjectRef<'_, CubicDetachedVertex> {
    pub fn compute_in(&self) {
        let pos = math::Vec::new(self.cast::<PathVertex>().x(), self.cast::<PathVertex>().y());
        let diff = math::Vec::new(
            self.in_rotation().cos() * self.in_distance(),
            self.in_rotation().sin() * self.in_distance(),
        );

        self.cast::<CubicVertex>().set_in_point(pos + diff);
    }

    pub fn compute_out(&self) {
        let pos = math::Vec::new(self.cast::<PathVertex>().x(), self.cast::<PathVertex>().y());
        let diff = math::Vec::new(
            self.out_rotation().cos() * self.out_distance(),
            self.out_rotation().sin() * self.out_distance(),
        );

        self.cast::<CubicVertex>().set_out_point(pos + diff);
    }
}

impl Core for CubicDetachedVertex {
    parent_types![(cubic_vertex, CubicVertex)];

    properties![
        (84, in_rotation, set_in_rotation),
        (85, in_distance, set_in_distance),
        (86, out_rotation, set_out_rotation),
        (87, out_distance, set_out_distance),
        cubic_vertex,
    ];
}

impl OnAdded for ObjectRef<'_, CubicDetachedVertex> {
    on_added!(CubicVertex);
}