/*
 * Copyright 2010 Ole Loots <ole@monochrom.net>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf 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; version 2 of the License.
 *
 * NetSurf 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdbool.h>
#include <assert.h>
#include <windom.h>

#include "desktop/gui.h"
#include "desktop/netsurf.h"
#include "desktop/browser.h"
#include "desktop/mouse.h"
#include "desktop/textinput.h"
#include "content/content.h"
#include "content/hlcache.h"
#include "content/urldb.h"
#include "css/css.h"
#include "render/box.h"
#include "render/form.h"
#include "utils/log.h"
#include "utils/messages.h"

#include "atari/gui.h"
#include "atari/browser.h"
#include "atari/browser_win.h"
#include "atari/misc.h"
#include "atari/clipboard.h"
#include "desktop/options.h"
#include "atari/res/netsurf.rsh"
#include "atari/ctxmenu.h"


#define CNT_INVALID 0
#define CNT_URLINPUT 32
#define CNT_BROWSER 64
#define CNT_HREF 128
#define CNT_SELECTION 256
#define CNT_INTERACTIVE 512
#define CNT_IMG 1024


struct s_context_info {
	unsigned long flags;
	struct contextual_content ccdata;
};

struct s_context_info ctxinfo;

static struct s_context_info * get_context_info( struct gui_window * gw, short mx, short my )
{
	int posx, posy;
	struct box *box;
	struct box *file_box = 0;
	hlcache_handle *h;
	int box_x, box_y;
	LGRECT bwrect;
	struct contextual_content ccdata;
	struct browser_window * bw = gw->browser->bw;
	h = bw->current_content;

	ctxinfo.flags = 0;

	browser_get_rect( gw, BR_CONTENT, &bwrect );
	mx -= bwrect.g_x;
	my -= bwrect.g_y;
	if( (mx < 0 || mx > bwrect.g_w) || (my < 0 || my > bwrect.g_h) ){
		// TODO: check for urlinput location
		// and set CNT_URLINPUT
		return(&ctxinfo);
	}

	if (!bw->current_content || content_get_type(h) != CONTENT_HTML){
		return(&ctxinfo);
	}

	ctxinfo.flags |= CNT_BROWSER;
	memset( &ctxinfo.ccdata, sizeof(struct contextual_content), 0 );
	browser_window_get_contextual_content(
		gw->browser->bw,
		mx+gw->browser->scroll.current.x,
		my+gw->browser->scroll.current.y,
		(struct contextual_content*)&ctxinfo.ccdata
	);
	if( ctxinfo.ccdata.link_url ){
		ctxinfo.flags |= CNT_HREF;
	}
	if( ctxinfo.ccdata.object) {
		if( content_get_type(ctxinfo.ccdata.object) == CONTENT_IMAGE ){
			ctxinfo.flags |= CNT_IMG;
		}
	}

	box = html_get_box_tree(h);
	box_x = box->margin[LEFT];
	box_y = box->margin[TOP];

	while ((box = box_at_point(box, mx+gw->browser->scroll.current.x, my+gw->browser->scroll.current.y, &box_x, &box_y, &h)))
	{
		if (box->style && css_computed_visibility(box->style) == CSS_VISIBILITY_HIDDEN)
			continue;
		if (box->gadget)
        	{
			switch (box->gadget->type)
			{
				case GADGET_TEXTBOX:
				case GADGET_TEXTAREA:
				case GADGET_PASSWORD:
					// TODO: check if there is really an selection, but it
					// doesn't hurt for now...:
					ctxinfo.flags |= (CNT_INTERACTIVE | CNT_SELECTION);
				break;

				default: break;
			}
         	}
    	}
	return( &ctxinfo );
}

void context_popup( struct gui_window * gw, short x, short y )
{

#define POP_FIRST_ITEM POP_CTX_CUT_SEL
#define POP_LAST_ITEM POP_CTX_SAVE_LINK_AS

	OBJECT * pop;
	int choice;
	struct s_context_info * ctx;
	unsigned long size;
	char * data;
	FILE * fp_tmpfile;
	char * tempfile;
	int err = 0;
	char * editor;
	char cmdline[128];

	pop = get_tree( POP_CTX );
	if( pop == NULL )
        	return;
	ctx = get_context_info( gw, x, y );

    /*
        Disable all items by default:
    */
	for( choice = POP_FIRST_ITEM; choice<=POP_LAST_ITEM; choice++ ){
		SET_BIT(pop[ choice ].ob_state, DISABLED, 1);
	}

	if( ctx->flags & CNT_INTERACTIVE ){
        	SET_BIT(pop[ POP_CTX_PASTE_SEL ].ob_state, DISABLED, 0);
    	}

	if( (ctx->flags & CNT_BROWSER) ){
		SET_BIT(pop[ POP_CTX_SELECT_ALL ].ob_state, DISABLED, 0);
		SET_BIT(pop[ POP_CTX_COPY_SEL ].ob_state, DISABLED, 0);
		SET_BIT(pop[ POP_CTX_VIEW_SOURCE ].ob_state, DISABLED, 0);
	}

	if( ctx->flags & CNT_HREF ){
		SET_BIT(pop[ POP_CTX_COPY_LINK ].ob_state, DISABLED, 0);
        SET_BIT(pop[ POP_CTX_OPEN_NEW ].ob_state, DISABLED, 0);
        SET_BIT(pop[ POP_CTX_SAVE_LINK_AS ].ob_state, DISABLED, 0);
	}

	if( ctx->flags & CNT_IMG ){
		SET_BIT(pop[ POP_CTX_SAVE_AS ].ob_state, DISABLED, 0);
		SET_BIT(pop[ POP_CTX_COPY_URL ].ob_state, DISABLED, 0);
		SET_BIT(pop[ POP_CTX_OPEN_NEW ].ob_state, DISABLED, 0);
	}

	choice = MenuPopUp(
		pop, x, y,
		-1, -1, -1,
		P_WNDW + P_CHCK
	);

	switch( choice ){
		case POP_CTX_COPY_SEL:
			browser_window_key_press( gw->browser->bw, KEY_COPY_SELECTION );
		break;

		case POP_CTX_CUT_SEL:
			browser_window_key_press( gw->browser->bw, KEY_CUT_SELECTION );
		break;

		case POP_CTX_PASTE_SEL:
			gui_paste_from_clipboard(gw, x, y);
		break;

		case POP_CTX_SELECT_ALL:
			browser_window_key_press( gw->browser->bw, KEY_SELECT_ALL );
		break;

		case POP_CTX_SAVE_AS:
			if( ctx->ccdata.object != NULL ) {
				if( hlcache_handle_get_url(ctx->ccdata.object) != NULL ) {
					browser_window_download(
						gw->browser->bw,
						nsurl_access(hlcache_handle_get_url(ctx->ccdata.object)),
						nsurl_access(hlcache_handle_get_url(gw->browser->bw->current_content))
					);
				}
			}

		case POP_CTX_SAVE_LINK_AS:
			if( ctx->ccdata.link_url != NULL ) {
				browser_window_download(
					gw->browser->bw,
					nsurl_access((const char*)ctx->ccdata.link_url),
					nsurl_access(hlcache_handle_get_url(gw->browser->bw->current_content))
				);
			}

		break;

		case POP_CTX_COPY_URL:
			if( (ctx->flags & CNT_IMG) && (ctx->ccdata.object != NULL) ){
				if( hlcache_handle_get_url(ctx->ccdata.object) != NULL ){
					scrap_txt_write(&app,  (char*)nsurl_access(hlcache_handle_get_url(ctx->ccdata.object)) );
				}
			}
		break;

		case POP_CTX_COPY_LINK:
			if( (ctx->flags & CNT_HREF) && ctx->ccdata.link_url != NULL ){
				scrap_txt_write(&app, (char*)ctx->ccdata.link_url);
			}
		break;

		case POP_CTX_OPEN_NEW:
			if( (ctx->flags & CNT_HREF) && ctx->ccdata.link_url) {
				browser_window_create(
					ctx->ccdata.link_url,
					gw->browser->bw,
					nsurl_access(hlcache_handle_get_url(gw->browser->bw->current_content)),
					true, false
				);
			}
		break;

		case POP_CTX_VIEW_SOURCE:
			editor = nsoption_charp(atari_editor);
			if( editor != NULL && strlen(editor)>0  ) {
				data = content_get_source_data( gw->browser->bw->current_content, &size );
				if( size > 0 && data != NULL ){
					tempfile = tmpnam( NULL );
					fp_tmpfile = fopen( tempfile, "w" );
					if( fp_tmpfile ){
						fwrite( data, size, 1, fp_tmpfile );
						fclose( fp_tmpfile );

						// TODO: check if app is runnin, if not, use pexec or such.
						/*
						  sprintf((char*)&cmdline, "%s \"%s\"", nsoption_charp(atari_editor), tempfile );
						  system( (char*)&cmdline );
						*/
						err = ShelWrite( editor, tempfile , editor, 1, 0);
						LOG(("Launched: %s %s (%d)\n", editor, tempfile, err ));
					} else {
						printf("Could not open temp file: %s!\n", tempfile );
					}

				} else {
					LOG(("Invalid content!"));
				}
			} else {
				form_alert(0, "[1][Set option \"option_atari_editor\".][OK]");
			}
		break;

		default: break;
	}

#undef POP_FIRST_ITEM
#undef POP_LAST_ITEM

}