/*
 *	aegis - project change supervisor
 *	Copyright (C) 1994, 1995, 1996, 1999, 2001 Peter Miller;
 *	All rights reserved.
 *
 *	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 2 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, write to the Free Software
 *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: functions to manipulate cstate values
 */

#include <aer/value/cstate.h>
#include <aer/value/error.h>
#include <aer/value/fstate.h>
#include <aer/value/integer.h>
#include <aer/value/list.h>
#include <aer/value/null.h>
#include <aer/value/pconf.h>
#include <aer/value/string.h>
#include <aer/value/struct.h>
#include <change.h>
#include <error.h>
#include <mem.h>
#include <project.h>
#include <sub.h>
#include <trace.h>


typedef struct rpt_value_cstate_ty rpt_value_cstate_ty;
struct rpt_value_cstate_ty
{
	RPT_VALUE
	project_ty	*pp;
	long		length;
	long		*list;
};


static void destruct _((rpt_value_ty *));

static void
destruct(vp)
	rpt_value_ty	*vp;
{
	rpt_value_cstate_ty *this;

	trace(("rpt_value_cstate::destruct(vp = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_cstate_ty *)vp;
	project_free(this->pp);
	mem_free(this->list);
	trace((/*{*/"}\n"));
}


static rpt_value_ty *lookup _((rpt_value_ty *, rpt_value_ty *, int));

static rpt_value_ty *
lookup(vp, rhs, lval)
	rpt_value_ty	*vp;
	rpt_value_ty	*rhs;
	int		lval;
{
	rpt_value_cstate_ty *this;
	rpt_value_ty	*rhs2;
	rpt_value_ty	*result;
	long		change_number;
	long		j;
	change_ty	*cp;
	cstate		cstate_data;
	string_ty	*name;
	rpt_value_ty	*vp1;
	rpt_value_ty	*vp2;
	rpt_value_ty	*vp3;

	/*
	 * extract the change number
	 */
	trace(("rpt_value_cstate::lookup(this = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_cstate_ty *)vp;
	rhs2 = rpt_value_integerize(rhs);
	if (rhs2->method->type != rpt_value_type_integer)
	{
		sub_context_ty	*scp;
		string_ty	*s;

		scp = sub_context_new();
		sub_var_set_charstar(scp, "Name", rhs2->method->name);
		rpt_value_free(rhs2);
		s = subst_intl(scp, i18n("integer index required (was given $name)"));
		sub_context_delete(scp);
		result = rpt_value_error((struct rpt_pos_ty *)0, s);
		trace((/*{*/"}\n"));
		return result;
	}
	change_number = rpt_value_integer_query(rhs2);
	rpt_value_free(rhs2);

	/*
	 * see if the change exists
	 */
	for (j = 0; j < this->length; ++j)
		if (this->list[j] == change_number)
			break;
	if (j >= this->length)
	{
		result = rpt_value_nul();
		trace((/*{*/"}\n"));
		return result;
	}

	/*
	 * find the change
	 */
	cp = change_alloc(this->pp, magic_zero_encode(change_number));
	change_bind_existing(cp);

	/*
	 * create the result value
	 */
	cstate_data = change_cstate_get(cp);
	result = cstate_type.convert(&cstate_data);
	assert(result);
	assert(result->method->type == rpt_value_type_structure);

	/*
	 * The src field is now kept in the fstate file.
	 * It will not be read in until referenced.
	 */
	assert(!cstate_data->src);
	name = str_from_c("src");
	vp1 = rpt_value_fstate(cp);
	rpt_value_struct__set(result, name, vp1);
	str_free(name);
	rpt_value_free(vp1);

	/*
	 * add some extra stuff
	 */
	name = str_from_c("project_name");
	vp1 = rpt_value_string(project_name_get(this->pp));
	rpt_value_struct__set(result, name, vp1);
	str_free(name);
	rpt_value_free(vp1);
	name = str_from_c("change_number");
	vp1 = rpt_value_integer(change_number);
	rpt_value_struct__set(result, name, vp1);
	str_free(name);
	rpt_value_free(vp1);

	/*
	 * Add a special "config" field, which is a deferred reference
	 * to the project config data.
	 */
	name = str_from_c("config");
	vp1 = rpt_value_pconf(cp);
	rpt_value_struct__set(result, name, vp1);
	str_free(name);
	rpt_value_free(vp1);

	/*
	 * mangle the "change" list
	 * into a deferred array of cstate values
	 */
	if (cstate_data->branch && cstate_data->branch->change)
	{
		name = str_from_c("branch");
		vp1 = rpt_value_string(name);
		assert(vp1);
		str_free(name);
		vp2 = rpt_value_lookup(result, vp1, 0);
		assert(vp2);
		rpt_value_free(vp1);
		vp3 =
			rpt_value_cstate
			(
				this->pp,
				cstate_data->branch->change->length,
				cstate_data->branch->change->list
			);
		name = str_from_c("change");
		rpt_value_struct__set(vp2, name, vp3);
		rpt_value_free(vp2);
		str_free(name);
		rpt_value_free(vp3);
	}

	/*
	 * clean up and go home
	 */
	change_free(cp);
	trace(("return %08lX;\n", (long)result));
	trace((/*{*/"}\n"));
	return result;
}


static rpt_value_ty *keys _((rpt_value_ty *));

static rpt_value_ty *
keys(vp)
	rpt_value_ty	*vp;
{
	rpt_value_cstate_ty *this;
	rpt_value_ty	*result;
	long		j;

	trace(("rpt_value_cstate::keys(this = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_cstate_ty *)vp;
	result = rpt_value_list();
	for (j = 0; j < this->length; ++j)
	{
		rpt_value_ty	*elem;

		elem = rpt_value_integer(magic_zero_decode(this->list[j]));
		rpt_value_list_append(result, elem);
		rpt_value_free(elem);
	}
	trace(("return %08lX;\n", (long)result));
	trace((/*{*/"}\n"));
	return result;
}


static rpt_value_ty *count _((rpt_value_ty *));

static rpt_value_ty *
count(vp)
	rpt_value_ty	*vp;
{
	rpt_value_cstate_ty *this;
	rpt_value_ty	*result;

	trace(("rpt_value_cstate::count(this = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_cstate_ty *)vp;
	result = rpt_value_integer(this->length);
	trace(("return %08lX;\n", (long)result));
	trace((/*{*/"}\n"));
	return result;
}


static char *type_of _((rpt_value_ty *));

static char *
type_of(vp)
	rpt_value_ty	*vp;
{
	char		*result;

	trace(("rpt_value_cstate::type_of(this = %08lX)\n{\n"/*}*/, (long)vp));
	result = "struct";
	trace(("return \"%s\";\n", result));
	trace((/*{*/"}\n"));
	return result;
}


static rpt_value_method_ty method =
{
	sizeof(rpt_value_cstate_ty),
	"cstate",
	rpt_value_type_structure,
	0, /* construct */
	destruct,
	0, /* arithmetic */
	0, /* stringize */
	0, /* booleanize */
	lookup,
	keys,
	count,
	type_of,
	0, /* undefer */
};


rpt_value_ty *
rpt_value_cstate(pp, length, list)
	project_ty	*pp;
	long		length;
	long		*list;
{
	rpt_value_cstate_ty *this;
	long		j;

	this = (rpt_value_cstate_ty *)rpt_value_alloc(&method);
	this->pp = project_copy(pp);
	this->length = length;
	this->list = mem_alloc(length * sizeof(long));
	for (j = 0; j < length; ++j)
		this->list[j] = magic_zero_decode(list[j]);
	return (rpt_value_ty *)this;
}