/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012-2017 gnosygnu@gmail.com

XOWA is licensed under the terms of the General Public License (GPL) Version 3,
or alternatively under the terms of the Apache License Version 2.0.

You may use XOWA according to either of these licenses as is most appropriate
for your project on a case-by-case basis.

The terms of each license can be found in the source code repository:

GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
*/
package gplx.gfml; import gplx.*;
class GfmlPragmaDefault implements GfmlPragma {
	public String KeyOfPragma() {return "_default";}
	public void Exec(GfmlBldr bldr, GfmlNde pragmaNde) {
		List_adp list = Compile(pragmaNde);
		GfmlDefaultPragma_bgnCmd.ExecList(bldr.TypeMgr().TypeRegy(), bldr.CurNdeFrame().CurDocPos(), list);
//			bldr.PragmaMgr.EndCmds_add(GfmlDocPos_.up_(bldr.CurNdeFrame.DocPos), GfmlDefaultPragma_endCmd.new_(list));
	}
	@gplx.Internal protected List_adp Compile(GfmlNde pragmaNde) {
		List_adp list = List_adp_.New();
		for (int i = 0; i < pragmaNde.SubHnds().Count(); i++) {
			GfmlNde subNde = (GfmlNde)pragmaNde.SubHnds().Get_at(i);
			CompileSubNde(subNde, list);
		}
		return list;
	}
	@gplx.Internal protected void CompileSubNde(GfmlNde nde, List_adp list) {
		String typeKey = nde.SubKeys().FetchDataOrNull("typeKey"); if (typeKey == null) throw Err_.new_missing_key("typeKey");
		for (int i = 0; i < nde.SubHnds().Count(); i++) {
			GfmlNde subNde = (GfmlNde)nde.SubHnds().Get_at(i);
			GfmlDefaultItem item = CompileItem(subNde, typeKey);
			list.Add(item);
		}
	}
	@gplx.Internal protected GfmlDefaultItem CompileItem(GfmlNde nde, String typeKey) {
		String key = nde.SubKeys().FetchDataOrFail("key");
		GfmlTkn valTkn = nde.SubKeys().FetchDataTknOrNull("val");
		return GfmlDefaultItem.new_(typeKey, key, valTkn);
	}
	public GfmlType[] MakePragmaTypes(GfmlTypeMakr makr) {
		makr.MakeSubTypeAsOwner(	"_default");
		makr.MakeSubTypeAsOwner(		"type", "typeKey");
		makr.MakeSubTypeAsOwner(			"atr", "key", "val");
		return makr.Xto_bry();
	}
	public static GfmlPragmaDefault new_() {return new GfmlPragmaDefault();} GfmlPragmaDefault() {}
	public static final    GfmlTkn Default_none = GfmlTkn_.raw_("DEFAULT NONE");
}
class GfmlDefaultItem {
	public String TypeKey() {return typeKey;} private String typeKey;
	public String Key() {return key;} private String key;
	public GfmlObj Val() {return val;} GfmlObj val;
	public GfmlObj ValPrev() {return valPrev;} @gplx.Internal protected GfmlDefaultItem ValPrev_(GfmlObj tkn) {valPrev = tkn; return this;} GfmlObj valPrev;
	
	public void Exec_bgn(GfmlType type) {
		GfmlFld fld = type.SubFlds().Get_by(key);
		if (fld == null) {						// no default defined; create
			valPrev = GfmlPragmaDefault.Default_none;
			fld = GfmlFld.new_(true, key, GfmlType_.StringKey).DefaultTkn_(val);
			type.SubFlds().Add(fld);
		}
		else {									// default exists; overwrite
			valPrev = fld.DefaultTkn();
			fld.DefaultTkn_(val);
		}
	}
	public void Exec_end(GfmlType type) {
		GfmlFld fld = type.SubFlds().Get_by(key); if (fld == null) return;
//			if (fld == null) throw Err_.arg_range_msg_("fatal: could not find fld; typeKey={0} fld={1}", typeKey, key);
		if (valPrev == GfmlPragmaDefault.Default_none)			// drop default; (had been created by pragma)
			type.SubFlds().Del(fld);
		else													// restore default
			fld.DefaultTkn_(valPrev);
	}
	public static GfmlDefaultItem new_(String typeKey, String key, GfmlTkn val) {
		GfmlDefaultItem rv = new GfmlDefaultItem();
		rv.typeKey = typeKey;
		rv.key = key;
		rv.val = val;
		return rv;
	}	GfmlDefaultItem() {}
}
class GfmlDefaultPragma_bgnCmd implements GfmlBldrCmd {
	public String Key() {return "pragma:gfml.default.bgnCmd";}
	public void Exec(GfmlBldr bldr, GfmlTkn tkn) {ExecList(bldr.TypeMgr().TypeRegy(), bldr.CurNdeFrame().CurDocPos(), list);}
	@gplx.Internal protected static void ExecList(GfmlTypRegy regy, GfmlDocPos pos, List_adp list) {
		GfmlType type = GfmlType_.Null;
		for (Object itemObj : list) {
			GfmlDefaultItem item = (GfmlDefaultItem)itemObj;
			if (!String_.Eq(item.TypeKey(), type.Key())) {
				type = regy.FetchOrNull(item.TypeKey(), pos);
				if (type == GfmlType_.Null) throw Err_.new_wo_type("default type must exist", "typeKey", item.TypeKey());
			}
			type = type.Clone().DocPos_(pos);
			regy.Add(type);
			item.Exec_bgn(type);
		}
	}
	List_adp list;
	public static GfmlDefaultPragma_bgnCmd new_(List_adp list) {
		GfmlDefaultPragma_bgnCmd rv = new GfmlDefaultPragma_bgnCmd();
		rv.list = list;
		return rv;
	}	GfmlDefaultPragma_bgnCmd() {}
}
class GfmlDefaultPragma_endCmd implements GfmlBldrCmd {
	public String Key() {return "pragma:gfml.default.endCmd";}
	public void Exec(GfmlBldr bldr, GfmlTkn tkn) {ExecList(bldr.TypeMgr().TypeRegy(), list);}
	public static void ExecList(GfmlTypRegy regy, List_adp list) {
		GfmlType type = GfmlType_.Null;
		for (Object itemObj : list) {
			GfmlDefaultItem item = (GfmlDefaultItem)itemObj;
			if (!String_.Eq(item.TypeKey(), type.Key())) {
				type = regy.FetchOrNull(item.TypeKey());
				if (type == GfmlType_.Null) throw Err_.new_wo_type("fatal: default type must exist", "typeKey", item.TypeKey());
			}
			item.Exec_end(type);
		}
	}
	List_adp list;
	public static GfmlDefaultPragma_endCmd new_(List_adp list) {
		GfmlDefaultPragma_endCmd rv = new GfmlDefaultPragma_endCmd();
		rv.list = list;
		return rv;
	}	GfmlDefaultPragma_endCmd() {}
}