/*************************************************************************/
/*  file_dialog.cpp                                                      */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "file_dialog.h"
#include "scene/gui/label.h"
#include "print_string.h"
#include "os/keyboard.h"



FileDialog::GetIconFunc FileDialog::get_icon_func=NULL;
FileDialog::GetIconFunc FileDialog::get_large_icon_func=NULL;

FileDialog::RegisterFunc FileDialog::register_func=NULL;
FileDialog::RegisterFunc FileDialog::unregister_func=NULL;


VBoxContainer *FileDialog::get_vbox() {
	return vbox;

}

void FileDialog::_notification(int p_what) {

	if (p_what==NOTIFICATION_ENTER_TREE) {

		refresh->set_icon(get_icon("reload"));
	}
	
	if (p_what==NOTIFICATION_DRAW) {

		//RID ci = get_canvas_item();
		//get_stylebox("panel","PopupMenu")->draw(ci,Rect2(Point2(),get_size()));
	}	
}

void FileDialog::set_enable_multiple_selection(bool p_enable) {

	tree->set_select_mode(p_enable?Tree::SELECT_MULTI : Tree::SELECT_SINGLE);
};

Vector<String> FileDialog::get_selected_files() const {

	Vector<String> list;

	TreeItem* item = tree->get_root();
	while ( (item = tree->get_next_selected(item)) ) {

		list.push_back(dir_access->get_current_dir().plus_file(item->get_text(0)));
	};

	return list;
};

void FileDialog::update_dir() {
	
	dir->set_text(dir_access->get_current_dir());
}

void FileDialog::_dir_entered(String p_dir) {
	
	
	dir_access->change_dir(p_dir);
	file->set_text("");
	invalidate();
	update_dir();
}

void FileDialog::_file_entered(const String& p_file) {

	_action_pressed();	
}

void FileDialog::_save_confirm_pressed() {
	String f=dir_access->get_current_dir().plus_file(file->get_text());
	emit_signal("file_selected",f);
	hide();		
}

void FileDialog::_post_popup() {

	ConfirmationDialog::_post_popup();
	if (invalidated) {
		update_file_list();
		invalidated=false;
	}
	if (mode==MODE_SAVE_FILE)
		file->grab_focus();
	else
		tree->grab_focus();

}

void FileDialog::_action_pressed() {
	
	if (mode==MODE_OPEN_FILES) {

		TreeItem *ti=tree->get_next_selected(NULL);
		String fbase=dir_access->get_current_dir();

		DVector<String> files;
		while(ti) {

			files.push_back( fbase.plus_file(ti->get_text(0)) );
			ti=tree->get_next_selected(ti);
		}

		if (files.size()) {
			emit_signal("files_selected",files);
			hide();
		}

		return;
	}

	String f=dir_access->get_current_dir().plus_file(file->get_text());
	                   
	if (mode==MODE_OPEN_FILE && dir_access->file_exists(f)) {
		emit_signal("file_selected",f);
		hide();
	}

	if (mode==MODE_OPEN_DIR) {


		String path=dir_access->get_current_dir();
		/*if (tree->get_selected()) {
			Dictionary d = tree->get_selected()->get_metadata(0);
			if (d["dir"]) {
				path=path+"/"+String(d["name"]);
			}
		}*/
		path=path.replace("\\","/");
		emit_signal("dir_selected",path);
		hide();
	}

	if (mode==MODE_SAVE_FILE) {
		
		bool valid=false;

		if (filter->get_selected()==filter->get_item_count()-1) {
			valid=true; //match none
		} else if (filters.size()>1 && filter->get_selected()==0) {
			// match all filters
			for (int i=0;i<filters.size();i++) {

				String flt=filters[i].get_slice(";",0);
				for (int j=0;j<flt.get_slice_count(",");j++) {

					String str = flt.get_slice(",",j).strip_edges();
					if (f.match(str)) {
						valid=true;
						break;
					}
				}
				if (valid)
					break;
			}
		} else {
			int idx=filter->get_selected();
			if (filters.size()>1)
				idx--;
			if (idx>=0 && idx<filters.size()) {

				String flt=filters[idx].get_slice(";",0);
				int filterSliceCount=flt.get_slice_count(",");
				for (int j=0;j<filterSliceCount;j++) {

					String str = (flt.get_slice(",",j).strip_edges());
					if (f.match(str)) {
						valid=true;
						break;
					}
				}

				if (!valid && filterSliceCount>0) {
					String str = (flt.get_slice(",",0).strip_edges());
					f+=str.substr(1, str.length()-1);
					file->set_text(f.get_file());
					valid=true;
				}
			} else {
				valid=true;
			}
		}


		if (!valid) {

			exterr->popup_centered_minsize(Size2(250,80));
			return;

		}

		if (dir_access->file_exists(f)) {
			confirm_save->set_text("File Exists, Overwrite?");
			confirm_save->popup_centered(Size2(200,80));
		} else {
			

			emit_signal("file_selected",f);
			hide();
		}
	}
}

void FileDialog::_cancel_pressed() {

	file->set_text("");
	invalidate();
	hide();
}

void FileDialog::_tree_selected() {
	
	TreeItem *ti=tree->get_selected();
	if (!ti)
		return;
	Dictionary d=ti->get_metadata(0);
		
	if (!d["dir"]) {
		
		file->set_text(d["name"]);
	}
		
}

void FileDialog::_tree_dc_selected() {
	

	TreeItem *ti=tree->get_selected();
	if (!ti)
		return;
	
	Dictionary d=ti->get_metadata(0);

	if (d["dir"]) {
		
		dir_access->change_dir(d["name"]);
		if (mode==MODE_OPEN_FILE || mode==MODE_OPEN_FILES || mode==MODE_OPEN_DIR)
			file->set_text("");
		call_deferred("_update_file_list");
		call_deferred("_update_dir");
	} else {
		
		_action_pressed();
	}
}

void FileDialog::update_file_list() {
	
	tree->clear();
	dir_access->list_dir_begin();
	
	TreeItem *root = tree->create_item();
	Ref<Texture> folder = get_icon("folder");
	List<String> files;
	List<String> dirs;
	
	bool isdir;
	bool ishidden;
	bool show_hidden = show_hidden_files;
	String item;

	while ((item=dir_access->get_next(&isdir))!="") {

		ishidden = dir_access->current_is_hidden();

		if (show_hidden || !ishidden) {
			if (!isdir)
				files.push_back(item);
			else
				dirs.push_back(item);
		}
	}
	
	dirs.sort_custom<NoCaseComparator>();
	files.sort_custom<NoCaseComparator>();
	
	while(!dirs.empty()) {
		
		if (dirs.front()->get()!=".") {
			TreeItem *ti=tree->create_item(root);
			ti->set_text(0,dirs.front()->get()+"/");
			ti->set_icon(0,folder);
			Dictionary d;
			d["name"]=dirs.front()->get();
			d["dir"]=true;
			ti->set_metadata(0,d);
		}
		dirs.pop_front();
		
	}
	
	dirs.clear();
	
	List<String> patterns;
	// build filter
	if (filter->get_selected()==filter->get_item_count()-1) {
		
		// match all 
	} else if (filters.size()>1 && filter->get_selected()==0) {
		// match all filters
		for (int i=0;i<filters.size();i++) {
			
			String f=filters[i].get_slice(";",0);
			for (int j=0;j<f.get_slice_count(",");j++) {
				
				patterns.push_back(f.get_slice(",",j).strip_edges());
			}
		}
	} else {
		int idx=filter->get_selected();
		if (filters.size()>1)
			idx--;
		
		if (idx>=0 && idx<filters.size()) {
			
			String f=filters[idx].get_slice(";",0);
			for (int j=0;j<f.get_slice_count(",");j++) {
				
				patterns.push_back(f.get_slice(",",j).strip_edges());
			}		
		}
	}


	String base_dir = dir_access->get_current_dir();
		
	
	while(!files.empty()) {
		
		bool match=patterns.empty();
		
		for(List<String>::Element *E=patterns.front();E;E=E->next()) {
			
			if (files.front()->get().matchn(E->get())) {
				
				match=true;
				break;
			}
		}
		
		if (match) {
			TreeItem *ti=tree->create_item(root);
			ti->set_text(0,files.front()->get());

			if (get_icon_func) {

				Ref<Texture> icon = get_icon_func(base_dir.plus_file(files.front()->get()));
				ti->set_icon(0,icon);
			}

			if (mode==MODE_OPEN_DIR) {
				ti->set_custom_color(0,get_color("files_disabled"));
				ti->set_selectable(0,false);
			}
			Dictionary d;
			d["name"]=files.front()->get();
			d["dir"]=false;
			ti->set_metadata(0,d);
			
			if (file->get_text()==files.front()->get())
				ti->select(0);
		}
		
		files.pop_front();
	}
	
	if (tree->get_root() && tree->get_root()->get_children())
		tree->get_root()->get_children()->select(0);
	
	files.clear();
	
}

void FileDialog::_filter_selected(int) {
	
	update_file_list();
}

void FileDialog::update_filters() {
	
	filter->clear();
	
	if (filters.size()>1) {
		String all_filters;

		const int max_filters=5;
		
		for(int i=0;i<MIN( max_filters, filters.size()) ;i++) {
			String flt=filters[i].get_slice(";",0);
			if (i>0)
				all_filters+=",";
			all_filters+=flt;
		}

		if (max_filters<filters.size())
			all_filters+=", ...";
		
		filter->add_item("All Recognized ( "+all_filters+" )");
	}
	for(int i=0;i<filters.size();i++) {
		
		String flt=filters[i].get_slice(";",0).strip_edges();
		String desc=filters[i].get_slice(";",1).strip_edges();
		if (desc.length())
			filter->add_item(desc+" ( "+flt+" )");
		else
			filter->add_item("( "+flt+" )");
	}
	
	filter->add_item("All Files (*)");
	
}

void FileDialog::clear_filters() {
	
	filters.clear();
	update_filters();
	invalidate();
}
void FileDialog::add_filter(const String& p_filter) {
	
	filters.push_back(p_filter);
	update_filters();
	invalidate();
	
}

String FileDialog::get_current_dir() const {
	
	return dir->get_text();	
}
String FileDialog::get_current_file() const {
	
	return file->get_text();
}
String FileDialog::get_current_path() const {
	
	return dir->get_text().plus_file(file->get_text());
}
void FileDialog::set_current_dir(const String& p_dir) {
	
	dir_access->change_dir(p_dir);
	update_dir();
	invalidate();
	
}
void FileDialog::set_current_file(const String& p_file) {
	
	file->set_text(p_file);
	update_dir();
	invalidate();
	int lp = p_file.find_last(".");
	if (lp!=-1) {
		file->select(0,lp);
		file->grab_focus();
	}

	
}
void FileDialog::set_current_path(const String& p_path) {
	
	if (!p_path.size())
		return;
	int pos=MAX( p_path.find_last("/"), p_path.find_last("\\") );
	if (pos==-1) {
		
		set_current_file(p_path);
	} else {
		
		String dir=p_path.substr(0,pos);
		String file=p_path.substr(pos+1,p_path.length());
		set_current_dir(dir);
		set_current_file(file);
	}
}


void FileDialog::set_mode(Mode p_mode) {
	
	mode=p_mode;
	switch(mode) {
		
		case MODE_OPEN_FILE: get_ok()->set_text("Open"); set_title("Open a File"); makedir->hide(); break;
		case MODE_OPEN_FILES: get_ok()->set_text("Open"); set_title("Open File(s)"); makedir->hide(); break;
		case MODE_SAVE_FILE: get_ok()->set_text("Save"); set_title("Save a File"); makedir->show(); break;
		case MODE_OPEN_DIR: get_ok()->set_text("Open"); set_title("Open a Directory"); makedir->show(); break;
	}

	if (mode==MODE_OPEN_FILES) {
		tree->set_select_mode(Tree::SELECT_MULTI);
	} else {
		tree->set_select_mode(Tree::SELECT_SINGLE);

	}
}

FileDialog::Mode FileDialog::get_mode() const {
	
	return mode;
}

void FileDialog::set_access(Access p_access) {

	ERR_FAIL_INDEX(p_access,3);
	if (access==p_access)
		return;
	memdelete( dir_access );
	switch(p_access) {
		case ACCESS_FILESYSTEM: {

			dir_access = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
		} break;
		case ACCESS_RESOURCES: {

			dir_access = DirAccess::create(DirAccess::ACCESS_RESOURCES);
		} break;
		case ACCESS_USERDATA: {

			dir_access = DirAccess::create(DirAccess::ACCESS_USERDATA);
		} break;
	}
	access=p_access;
	_update_drives();
	invalidate();
	update_filters();
	update_dir();
}

void FileDialog::invalidate() {

	if (is_visible()) {
		update_file_list();
		invalidated=false;
	} else {
		invalidated=true;
	}

}

FileDialog::Access FileDialog::get_access() const{

	return access;
}

void FileDialog::_make_dir_confirm() {


	Error err = dir_access->make_dir( makedirname->get_text() );
	if (err==OK) {
		dir_access->change_dir(makedirname->get_text());
		invalidate();
		update_filters();
		update_dir();
	} else {
		mkdirerr->popup_centered_minsize(Size2(250,50));
	}
}


void FileDialog::_make_dir() {

	makedialog->popup_centered_minsize(Size2(250,80));
	makedirname->grab_focus();

}

void FileDialog::_select_drive(int p_idx) {

	String d = drives->get_item_text(p_idx);
	dir_access->change_dir(d);
	file->set_text("");
	invalidate();
	update_dir();

}

void FileDialog::_update_drives() {


	int dc = dir_access->get_drive_count();
	if (dc==0 || access!=ACCESS_FILESYSTEM) {
		drives->hide();
	} else {
		drives->clear();
		drives->show();

		for(int i=0;i<dir_access->get_drive_count();i++) {
			String d = dir_access->get_drive(i);			
			drives->add_item(dir_access->get_drive(i));
		}

		drives->select(dir_access->get_current_drive());

	}
}

bool FileDialog::default_show_hidden_files=false;


void FileDialog::_bind_methods() {
	
	ObjectTypeDB::bind_method(_MD("_tree_selected"),&FileDialog::_tree_selected);
	ObjectTypeDB::bind_method(_MD("_tree_db_selected"),&FileDialog::_tree_dc_selected);
	ObjectTypeDB::bind_method(_MD("_dir_entered"),&FileDialog::_dir_entered);
	ObjectTypeDB::bind_method(_MD("_file_entered"),&FileDialog::_file_entered);
	ObjectTypeDB::bind_method(_MD("_action_pressed"),&FileDialog::_action_pressed);
	ObjectTypeDB::bind_method(_MD("_cancel_pressed"),&FileDialog::_cancel_pressed);
	ObjectTypeDB::bind_method(_MD("_filter_selected"),&FileDialog::_filter_selected);
	ObjectTypeDB::bind_method(_MD("_save_confirm_pressed"),&FileDialog::_save_confirm_pressed);
	
	ObjectTypeDB::bind_method(_MD("clear_filters"),&FileDialog::clear_filters);
	ObjectTypeDB::bind_method(_MD("add_filter","filter"),&FileDialog::add_filter);
	ObjectTypeDB::bind_method(_MD("get_current_dir"),&FileDialog::get_current_dir);
	ObjectTypeDB::bind_method(_MD("get_current_file"),&FileDialog::get_current_file);
	ObjectTypeDB::bind_method(_MD("get_current_path"),&FileDialog::get_current_path);
	ObjectTypeDB::bind_method(_MD("set_current_dir","dir"),&FileDialog::set_current_dir);
	ObjectTypeDB::bind_method(_MD("set_current_file","file"),&FileDialog::set_current_file);
	ObjectTypeDB::bind_method(_MD("set_current_path","path"),&FileDialog::set_current_path);
	ObjectTypeDB::bind_method(_MD("set_mode","mode"),&FileDialog::set_mode);
	ObjectTypeDB::bind_method(_MD("get_mode"),&FileDialog::get_mode);
	ObjectTypeDB::bind_method(_MD("get_vbox:VBoxContainer"),&FileDialog::get_vbox);
	ObjectTypeDB::bind_method(_MD("set_access","access"),&FileDialog::set_access);
	ObjectTypeDB::bind_method(_MD("get_access"),&FileDialog::get_access);
	ObjectTypeDB::bind_method(_MD("set_show_hidden_files","show"),&FileDialog::set_show_hidden_files);
	ObjectTypeDB::bind_method(_MD("is_showing_hidden_files"),&FileDialog::is_showing_hidden_files);
	ObjectTypeDB::bind_method(_MD("_select_drive"),&FileDialog::_select_drive);
	ObjectTypeDB::bind_method(_MD("_make_dir"),&FileDialog::_make_dir);
	ObjectTypeDB::bind_method(_MD("_make_dir_confirm"),&FileDialog::_make_dir_confirm);
	ObjectTypeDB::bind_method(_MD("_update_file_list"),&FileDialog::update_file_list);
	ObjectTypeDB::bind_method(_MD("_update_dir"),&FileDialog::update_dir);

	ObjectTypeDB::bind_method(_MD("invalidate"),&FileDialog::invalidate);

	ADD_SIGNAL(MethodInfo("file_selected",PropertyInfo( Variant::STRING,"path")));
	ADD_SIGNAL(MethodInfo("files_selected",PropertyInfo( Variant::STRING_ARRAY,"paths")));
	ADD_SIGNAL(MethodInfo("dir_selected",PropertyInfo( Variant::STRING,"dir")));

	BIND_CONSTANT( MODE_OPEN_FILE );
	BIND_CONSTANT( MODE_OPEN_FILES );
	BIND_CONSTANT( MODE_OPEN_DIR );
	BIND_CONSTANT( MODE_SAVE_FILE );

	BIND_CONSTANT( ACCESS_RESOURCES );
	BIND_CONSTANT( ACCESS_USERDATA );
	BIND_CONSTANT( ACCESS_FILESYSTEM );

}


void FileDialog::set_show_hidden_files(bool p_show) {
	show_hidden_files=p_show;
	invalidate();
}

bool FileDialog::is_showing_hidden_files() const {
	return show_hidden_files;
}

void FileDialog::set_default_show_hidden_files(bool p_show) {
	default_show_hidden_files=p_show;
}

FileDialog::FileDialog() {

	show_hidden_files=default_show_hidden_files;

	VBoxContainer *vbc = memnew( VBoxContainer );
	add_child(vbc);
	set_child_rect(vbc);

	mode=MODE_SAVE_FILE;
	set_title("Save a File");
	
	dir = memnew(LineEdit);
	HBoxContainer *pathhb = memnew( HBoxContainer );
	pathhb->add_child(dir);
	dir->set_h_size_flags(SIZE_EXPAND_FILL);

	refresh = memnew( ToolButton );
	refresh->connect("pressed",this,"_update_file_list");
	pathhb->add_child(refresh);

	drives = memnew( OptionButton );
	pathhb->add_child(drives);
	drives->connect("item_selected",this,"_select_drive");

	makedir = memnew( Button );
	makedir->set_text("Create Folder");
	makedir->connect("pressed",this,"_make_dir");
	pathhb->add_child(makedir);
	
	vbc->add_margin_child("Path:",pathhb);
	
	tree = memnew(Tree);
	tree->set_hide_root(true);
	vbc->add_margin_child("Directories & Files:",tree,true);
	
	file = memnew(LineEdit);
	//add_child(file);
	vbc->add_margin_child("File:",file);
	

	filter = memnew( OptionButton );
	//add_child(filter);
	vbc->add_margin_child("Filter:",filter);
	filter->set_clip_text(true);//too many extensions overflow it

	dir_access = DirAccess::create(DirAccess::ACCESS_RESOURCES);
	access=ACCESS_RESOURCES;
	_update_drives();

	
	connect("confirmed", this,"_action_pressed");
	//cancel->connect("pressed", this,"_cancel_pressed");
	tree->connect("cell_selected", this,"_tree_selected",varray(),CONNECT_DEFERRED);
	tree->connect("item_activated", this,"_tree_db_selected",varray());
	dir->connect("text_entered", this,"_dir_entered");
	file->connect("text_entered", this,"_file_entered");
	filter->connect("item_selected", this,"_filter_selected");

	
	confirm_save = memnew( ConfirmationDialog );
	confirm_save->set_as_toplevel(true);
	add_child(confirm_save);

	
	confirm_save->connect("confirmed", this,"_save_confirm_pressed");

	makedialog = memnew( ConfirmationDialog );
	makedialog->set_title("Create Folder");
	VBoxContainer *makevb= memnew( VBoxContainer );
	makedialog->add_child(makevb);
	makedialog->set_child_rect(makevb);
	makedirname = memnew( LineEdit );
	makevb->add_margin_child("Name:",makedirname);
	add_child(makedialog);
	makedialog->register_text_enter(makedirname);
	makedialog->connect("confirmed",this,"_make_dir_confirm");
	mkdirerr = memnew( AcceptDialog );
	mkdirerr->set_text("Could not create folder.");
	add_child(mkdirerr);

	exterr = memnew( AcceptDialog );
	exterr->set_text("Must use a valid extension.");
	add_child(exterr);


	//update_file_list();
	update_filters();
	update_dir();

	set_hide_on_ok(false);
	vbox=vbc;


	invalidated=true;
	if (register_func)
		register_func(this);
	
}


FileDialog::~FileDialog() {
	
	if (unregister_func)
		unregister_func(this);
	memdelete(dir_access);
}


void LineEditFileChooser::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("_browse"),&LineEditFileChooser::_browse);
	ObjectTypeDB::bind_method(_MD("_chosen"),&LineEditFileChooser::_chosen);
	ObjectTypeDB::bind_method(_MD("get_button:Button"),&LineEditFileChooser::get_button);
	ObjectTypeDB::bind_method(_MD("get_line_edit:LineEdit"),&LineEditFileChooser::get_line_edit);
	ObjectTypeDB::bind_method(_MD("get_file_dialog:FileDialog"),&LineEditFileChooser::get_file_dialog);

}

void LineEditFileChooser::_chosen(const String& p_text){

	line_edit->set_text(p_text);
	line_edit->emit_signal("text_entered",p_text);
}

void LineEditFileChooser::_browse() {

	dialog->popup_centered_ratio();
}

LineEditFileChooser::LineEditFileChooser() {

	line_edit = memnew( LineEdit );
	add_child(line_edit);
	line_edit->set_h_size_flags(SIZE_EXPAND_FILL);
	button = memnew( Button );
	button->set_text(" .. ");
	add_child(button);
	button->connect("pressed",this,"_browse");
	dialog = memnew( FileDialog);
	add_child(dialog);
	dialog->connect("file_selected",this,"_chosen");
	dialog->connect("dir_selected",this,"_chosen");
	dialog->connect("files_selected",this,"_chosen");

}