//! Main map editor module.
//!
//! The entry point is responsible for maintaining the lifetime of the editor
//! and human interactions with it, but is otherwise not permitted to directly
//! edit it.

pub mod block;
pub mod state;

use crate::durandal::image::*;
use super::{color, draw::*};

impl MapEditor
{
   /// Opens the editor with a new empty map.
   #[inline]
   pub fn open_new(&mut self)
   {
      *self = MapEditor::Opened(state::OpenMap::default());
   }

   /// Draws the screen for this editor state.
   pub fn draw<D, I>(&self, d: &mut D, im: &I)
      where D: DrawArea<NativeImage = I>,
            I: CacheImage
   {
      let dw = d.w();
      let dh = d.h();
      let iw = im.w();
      let ih = im.h();

      match self {
         MapEditor::Closed => {
            let tx_top = "Map Required To Proceed";
            let tx_bot = "CAS.qterm//CyberAcme Systems Inc.";

            d.clear(Color16::new(0, 0, 0));

            d.image((dw / 2 - iw / 2, dh / 2 - ih / 2), im);

            d.rect(Rect{x: 0, y: 0, w: dw, h: 18}, color::DARK_RED);
            d.text((4, 14), tx_top, color::RED);

            d.rect(Rect{x: 0, y: dh - 18, w: dw, h: 18}, color::DARK_RED);
            d.text((4, dh - 4), tx_bot, color::RED);
         }
         MapEditor::Opened(st) => {
            let text = &format!("tool: {:?}", st.tool);

            d.clear(Color16::new(0, 0, 0));
            d.text((dw/2, dh/2), text, color::RED);
         }
      }
   }

   /// Returns `true` if `self` is closed.
   #[inline]
   pub fn is_closed(&self) -> bool
   {
      match self {
         MapEditor::Closed    => true,
         MapEditor::Opened(_) => false,
      }
   }

   /// Returns `true` if `self` is opened.
   #[inline]
   pub fn is_opened(&self) -> bool
   {
      match self {
         MapEditor::Closed    => false,
         MapEditor::Opened(_) => true,
      }
   }
}

impl Default for MapEditor
{
   #[inline]
   fn default() -> Self {MapEditor::Closed}
}

/// An entire map editor, which may be opened or closed.
pub enum MapEditor
{
   Closed,
   Opened(state::OpenMap),
}

// EOF