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use crate::image::Image;
pub use crate::prelude::*;
use crate::widget::*;
use fltk_sys::group::*;
use std::{
    ffi::{CStr, CString},
    mem,
    os::raw,
};

/// Creates an widget group
#[derive(WidgetExt, GroupExt, Debug)]
pub struct Group {
    _inner: *mut Fl_Group,
    _tracker: *mut fltk_sys::fl::Fl_Widget_Tracker,
}

/// Creates an widget pack
#[derive(WidgetExt, GroupExt, Debug)]
pub struct Pack {
    _inner: *mut Fl_Pack,
    _tracker: *mut fltk_sys::fl::Fl_Widget_Tracker,
}

/// Creates a scroll group
#[derive(WidgetExt, GroupExt, Debug)]
pub struct Scroll {
    _inner: *mut Fl_Scroll,
    _tracker: *mut fltk_sys::fl::Fl_Widget_Tracker,
}

impl Scroll {
    /// Returns the x position
    pub fn xposition(&self) -> u32 {
        assert!(!self.was_deleted());
        unsafe { Fl_Scroll_xposition(self._inner) as u32 }
    }

    /// Returns the y position
    pub fn yposition(&self) -> u32 {
        assert!(!self.was_deleted());
        unsafe { Fl_Scroll_yposition(self._inner) as u32 }
    }

    /// Scrolls from ```from``` to ```to```
    pub fn scroll_to(&mut self, from: u32, to: u32) {
        debug_assert!(
            from <= std::i32::MAX as u32,
            "u32 entries have to be < std::i32::MAX for compatibility!"
        );
        debug_assert!(
            to <= std::i32::MAX as u32,
            "u32 entries have to be < std::i32::MAX for compatibility!"
        );
        assert!(!self.was_deleted());
        unsafe { Fl_Scroll_scroll_to(self._inner, from as i32, to as i32) }
    }

    /// Gets the scrollbar size
    pub fn scrollbar_size(&self) -> u32 {
        assert!(!self.was_deleted());
        unsafe { Fl_Scroll_scrollbar_size(self._inner) as u32 }
    }

    /// Sets the scrollbar size
    pub fn set_scrollbar_size(&mut self, new_size: u32) {
        debug_assert!(
            new_size <= std::i32::MAX as u32,
            "u32 entries have to be < std::i32::MAX for compatibility!"
        );
        assert!(!self.was_deleted());
        unsafe { Fl_Scroll_set_scrollbar_size(self._inner, new_size as i32) }
    }
}

/// Creates a tab which can contain widgets
#[derive(WidgetExt, GroupExt, Debug)]
pub struct Tabs {
    _inner: *mut Fl_Tabs,
    _tracker: *mut fltk_sys::fl::Fl_Widget_Tracker,
}

/// Creates a tile which can contain widgets
#[derive(WidgetExt, GroupExt, Debug)]
pub struct Tile {
    _inner: *mut Fl_Tile,
    _tracker: *mut fltk_sys::fl::Fl_Widget_Tracker,
}

/// Creates a wizard widget
#[derive(WidgetExt, GroupExt, Debug)]
pub struct Wizard {
    _inner: *mut Fl_Wizard,
    _tracker: *mut fltk_sys::fl::Fl_Widget_Tracker,
}

impl Wizard {
    /// Gets the next view of the wizard
    pub fn next(&mut self) {
        assert!(!self.was_deleted());
        unsafe { Fl_Wizard_next(self._inner) }
    }

    /// Gets the previous view of the wizard
    pub fn prev(&mut self) {
        assert!(!self.was_deleted());
        unsafe { Fl_Wizard_prev(self._inner) }
    }

    /// Gets the underlying widget of the current view
    pub fn current_widget(&mut self) -> Widget {
        unsafe {
            assert!(!self.was_deleted());
            Widget::from_raw(Fl_Wizard_value(self._inner) as *mut fltk_sys::widget::Fl_Widget)
        }
    }

    /// Sets the underlying widget of the current view
    pub fn set_current_widget<W: WidgetExt>(&mut self, w: &W) {
        unsafe {
            assert!(!self.was_deleted());
            Fl_Wizard_set_value(
                self._inner,
                w.as_widget_ptr() as *mut fltk_sys::group::Fl_Widget,
            )
        }
    }
}

/// Creates a color chooser widget
#[derive(WidgetExt, GroupExt, Debug)]
pub struct ColorChooser {
    _inner: *mut Fl_Color_Chooser,
    _tracker: *mut fltk_sys::fl::Fl_Widget_Tracker,
}

impl ColorChooser {
    pub fn rgb_color(&self) -> (u8, u8, u8) {
        unsafe {
            assert!(!self.was_deleted());
            let r = (Fl_Color_Chooser_r(self._inner) * 255.0) as u8;
            let g = (Fl_Color_Chooser_g(self._inner) * 255.0) as u8;
            let b = (Fl_Color_Chooser_b(self._inner) * 255.0) as u8;
            (r, g, b)
        }
    }
    pub fn hex_color(&self) -> u32 {
        let c = self.rgb_color();
        let x = Color::from_rgb(c.0, c.1, c.2);
        x.to_u32()
    }
}

impl Pack {
    pub fn spacing(&self) -> i32 {
        assert!(!self.was_deleted());
        unsafe { Fl_Pack_spacing(self._inner) }
    }

    pub fn set_spacing(&mut self, spacing: i32) {
        unsafe {
            assert!(!self.was_deleted());
            Fl_Pack_set_spacing(self._inner, spacing);
        }
    }
}