//
//	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 <common/ac/ctype.h>

#include <common/language.h>
#include <common/symtab.h>
#include <common/trace.h>
#include <common/wstring/list.h>
#include <libaegis/project.h>
#include <libaegis/project/history.h>
#include <libaegis/sub.h>
#include <libaegis/sub/project.h>

typedef string_ty *(*func_ptr)(project_ty *);
struct table_ty
{
    const char      *name;
    func_ptr	    func;
};


static string_ty *
trunk_name_get(project_ty *pp)
{
    return project_name_get(pp->trunk_get());
}


static string_ty *
trunk_description_get(project_ty *pp)
{
    string_ty *s = project_description_get(pp->trunk_get());
    const char *cp = s->str_text;
    language_human();
    while (isspace(*cp))
	++cp;
    const char *ep = cp;
    while (*ep != '\n')
	++ep;
    while (ep > cp && isspace(ep[-1]))
	--ep;
    language_C();
    return str_n_from_c(cp, ep - cp);
}


static table_ty table[] =
{
    {"name", project_name_get, },
    {"description", project_description_get, },
    {"trunk_name", trunk_name_get, },
    {"trunk_description", trunk_description_get, },
    {"version", project_version_short_get },
    {"version_long", project_version_get },
};

static symtab_ty *stp;


static func_ptr
find_func(const nstring &name)
{
    if (!stp)
    {
	stp = symtab_alloc(SIZEOF(table));
	for (const table_ty *tp = table; tp < ENDOF(table); ++tp)
	{
	    nstring s(tp->name);
	    stp->assign(s, (void *)tp->func);
	}
    }
    func_ptr result = (func_ptr)stp->query(name);
    if (!result)
    {
	nstring guess = stp->query_fuzzy(name);
	if (guess)
	{
            sub_context_ty sc;
	    sc.var_set_string("Name", name);
	    sc.var_set_string("Guess", guess);
	    sc.error_intl(i18n("no \"$name\", guessing \"$guess\""));
            result = (func_ptr)stp->query(guess);
	}
    }
    return result;
}


//
// NAME
//	sub_project - the project substitution
//
// SYNOPSIS
//	string_ty *sub_project(wstring_list_ty *arg);
//
// DESCRIPTION
//	The sub_project function implements the project substitution.
//	The project substitution is replaced by the project name.
//
// ARGUMENTS
//	arg	- list of arguments, including the function name as [0]
//
// RETURNS
//	a pointer to a string in dynamic memory;
//	or NULL on error, setting suberr appropriately.
//

wstring
sub_project(sub_context_ty *scp, const wstring_list &arg)
{
    trace(("sub_project()\n{\n"));
    wstring result;
    project_ty *pp = sub_context_project_get(scp);
    if (!pp)
    {
	scp->error_set(i18n("not valid in current context"));
        trace(("}\n"));
        return result;
    }
    if (arg.size() == 1)
	result = str_to_wstr(project_name_get(pp));
    else if (arg.size() == 2)
    {
        nstring s = arg[1].to_nstring();
        func_ptr func = find_func(s);
	if (!func)
	{
	    scp->error_set(i18n("unknown substitution variant"));
            trace(("}\n"));
            return result;
	}
        result = wstring(func(pp));
    }
    else
    {
	scp->error_set(i18n("requires one argument"));
        trace(("}\n"));
        return result;
    }
    trace(("return %8.8lX;\n", (long)result.get_ref()));
    trace(("}\n"));
    return result;
}