//! ## Utils
//!
//! `Utils` implements utilities functions to work with layouts

/*
*
*   Copyright (C) 2020-2021 Christian Visintin - christian.visintin1997@gmail.com
*
* 	This file is part of "TermSCP"
*
*   TermSCP is free software: you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation, either version 3 of the License, or
*   (at your option) any later version.
*
*   TermSCP is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with TermSCP.  If not, see <http://www.gnu.org/licenses/>.
*
*/

use tui::layout::{Constraint, Direction, Layout, Rect};

/// ### draw_area_in
///
/// Draw an area (WxH / 3) in the middle of the parent area
pub fn draw_area_in(parent: Rect, width: u16, height: u16) -> Rect {
    let new_area = Layout::default()
        .direction(Direction::Vertical)
        .constraints(
            [
                Constraint::Percentage((100 - height) / 2),
                Constraint::Percentage(height),
                Constraint::Percentage((100 - height) / 2),
            ]
            .as_ref(),
        )
        .split(parent);
    Layout::default()
        .direction(Direction::Horizontal)
        .constraints(
            [
                Constraint::Percentage((100 - width) / 2),
                Constraint::Percentage(width),
                Constraint::Percentage((100 - width) / 2),
            ]
            .as_ref(),
        )
        .split(new_area[1])[1]
}

#[cfg(test)]
mod tests {

    use super::*;

    #[test]
    fn test_ui_layout_utils_draw_area_in() {
        let area: Rect = Rect::new(0, 0, 1024, 512);
        let child: Rect = draw_area_in(area, 75, 30);
        println!("{:?}", child);
        assert_eq!(child.x, 43);
        assert_eq!(child.y, 63);
        assert_eq!(child.width, 271);
        assert_eq!(child.height, 54);
    }
}