//
//	aegis - project change supervisor
//	Copyright (C) 1999, 2002-2008 Peter Miller
//
//	This program 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; either version 3 of the License, or
//	(at your option) any later version.
//
//	This program 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 <libaegis/change/file.h>
#include <common/error.h> // for assert
#include <libaegis/project/file.h>
#include <common/trace.h>


fstate_src_ty *
project_file_find(project_ty *pp, string_ty *file_name,
    view_path_ty as_view_path)
{
    trace(("project_file_find(pp = %8.8lX, file_name = \"%s\")\n{\n",
	(long)pp, file_name->str_text));
    change::pointer cp = pp->change_get();
    fstate_src_ty *src_data = change_file_find(cp, file_name, view_path_first);
    if (src_data)
    {
	trace(("%s \"%s\"\n", file_action_ename(src_data->action),
	    src_data->file_name->str_text));
	switch (as_view_path)
	{
	case view_path_first:
	    //
	    // This means that transparent and removed files
	    // are returned.  No project file union, either.
	    //
	    break;

	case view_path_none:
	    //
	    // This means that transparent files are returned as
	    // transparent, no processing or filtering of the list
	    // is performed.
	    //
	    break;

	case view_path_extreme:
	    //
	    // This means that transparent files are resolved (the
	    // underlying file is shown), and removed files are
	    // omitted from the result.
	    //
	    switch (src_data->action)
	    {
	    case file_action_remove:
		trace(("return NULL;\n"));
		trace(("}\n"));
		return 0;

	    case file_action_create:
	    case file_action_modify:
	    case file_action_insulate:
	    case file_action_transparent:
#ifndef DEBUG
	    default:
#endif
		assert(!src_data->deleted_by);
		if (src_data->deleted_by)
		{
		    trace(("return NULL;\n"));
		    trace(("}\n"));
		    return 0;
		}
		break;
	    }
	    // fall through...

	case view_path_simple:
	    //
	    // This means that transparent files are resolved
	    // (the underlying file is shown), but removed files
	    // are retained.
	    //
	    switch (src_data->action)
	    {
	    case file_action_transparent:
		goto deeper;

	    case file_action_remove:
		//
		// Remember if the file has been removed.
		//
		break;

	    case file_action_create:
	    case file_action_modify:
	    case file_action_insulate:
#ifndef DEBUG
	    default:
#endif
		// should be file_action_remove
		assert(!src_data->deleted_by);
		if (src_data->deleted_by)
		    break;

		// should be file_action_transparent
		assert(!src_data->about_to_be_copied_by);
		if (src_data->about_to_be_copied_by)
		    goto deeper;

		// should be file_action_transparent
		assert(!src_data->about_to_be_created_by);
		if (src_data->about_to_be_created_by)
		    goto deeper;
		break;
	    }
	    break;
	}
	trace(("return %8.8lX;\n", (long)src_data));
	trace(("}\n"));
	return src_data;
    }
    if (as_view_path == view_path_first)
    {
	//
	// This means that transparent and removed files
	// are returned.  No project file union, either.
	//
	trace(("return NULL;\n"));
	trace(("}\n"));
	return 0;
    }
    deeper:
    if (pp->is_a_trunk())
    {
	trace(("return NULL;\n"));
	trace(("}\n"));
	return 0;
    }
    src_data = project_file_find(pp->parent_get(), file_name, as_view_path);
    trace(("return %08lX;\n", (long)src_data));
    trace(("}\n"));
    return src_data;
}