/*
 *	aegis - project change supervisor
 *	Copyright (C) 2001-2003 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 aerbus
 */

#include <ac/stdio.h>
#include <ac/stdlib.h>

#include <ael/change/by_state.h>
#include <aerbu.h>
#include <arglex2.h>
#include <arglex/change.h>
#include <arglex/project.h>
#include <change.h>
#include <change/file.h>
#include <commit.h>
#include <dir.h>
#include <error.h>
#include <file.h>
#include <help.h>
#include <lock.h>
#include <mem.h>
#include <os.h>
#include <progname.h>
#include <project.h>
#include <project/file.h>
#include <project/history.h>
#include <sub.h>
#include <trace.h>
#include <undo.h>
#include <user.h>


static void
review_begin_undo_usage(void)
{
    const char      *progname;

    progname = progname_get();
    fprintf
    (
	stderr,
	"usage: %s -Review_PASS <change_number> [ <option>... ]\n",
	progname
    );
    fprintf(stderr, "       %s -Review_PASS -List [ <option>... ]\n", progname);
    fprintf(stderr, "       %s -Review_PASS -Help\n", progname);
    quit(1);
}


static void
review_begin_undo_help(void)
{
    help("aerbu", review_begin_undo_usage);
}


static void
review_begin_undo_list(void)
{
    string_ty	    *project_name;

    trace(("review_begin_undo_list()\n{\n"));
    project_name = 0;
    arglex();
    while (arglex_token != arglex_token_eoln)
    {
	switch (arglex_token)
	{
	default:
	    generic_argument(review_begin_undo_usage);
	    continue;

	case arglex_token_project:
	    arglex();
	    /* fall through... */

	case arglex_token_string:
	    arglex_parse_project(&project_name, review_begin_undo_usage);
	    continue;
	}
	arglex();
    }
    list_changes_in_state_mask(project_name, 1 << cstate_state_being_reviewed);
    if (project_name)
	str_free(project_name);
    trace(("}\n"));
}


static void
review_begin_undo_main(void)
{
    cstate_ty	    *cstate_data;
    cstate_history_ty *history_data;
    string_ty	    *project_name;
    project_ty	    *pp;
    long	    change_number;
    change_ty	    *cp;
    user_ty	    *up;

    trace(("review_begin_undo_main()\n{\n"));
    arglex();
    project_name = 0;
    change_number = 0;
    while (arglex_token != arglex_token_eoln)
    {
	switch (arglex_token)
	{
	default:
	    generic_argument(review_begin_undo_usage);
	    continue;

	case arglex_token_change:
	    arglex();
	    /* fall through... */

	case arglex_token_number:
	    arglex_parse_change
	    (
		&project_name,
		&change_number,
		review_begin_undo_usage
	    );
	    continue;

	case arglex_token_project:
	    arglex();
	    /* fall through... */

	case arglex_token_string:
	    arglex_parse_project(&project_name, review_begin_undo_usage);
	    continue;

	case arglex_token_wait:
	case arglex_token_wait_not:
	    user_lock_wait_argument(review_begin_undo_usage);
	    break;
	}
	arglex();
    }

    /*
     * locate project data
     */
    if (!project_name)
	project_name = user_default_project();
    pp = project_alloc(project_name);
    str_free(project_name);
    project_bind_existing(pp);

    /*
     * locate user data
     */
    up = user_executing(pp);

    /*
     * locate change data
     */
    if (!change_number)
	change_number = user_default_change(up);
    cp = change_alloc(pp, change_number);
    change_bind_existing(cp);

    /*
     * lock the change for writing
     */
    change_cstate_lock_prepare(cp);
    lock_take();
    cstate_data = change_cstate_get(cp);

    /*
     * it is an error if the change is not in the 'being_reviewed' state.
     */
    if (cstate_data->state != cstate_state_being_reviewed)
	change_fatal(cp, 0, i18n("bad rbu state"));
    if
    (
	project_develop_end_action_get(pp)
    !=
	pattr_develop_end_action_goto_awaiting_review
    )
    {
	if (!project_reviewer_query(pp, user_name(up)))
	    project_fatal(pp, 0, i18n("not a reviewer"));
	if
	(
	    !project_developer_may_review_get(pp)
	&&
	    str_equal(change_developer_name(cp), user_name(up))
	)
	    change_fatal(cp, 0, i18n("developer may not review"));
    }
    else
    {
	if (!str_equal(change_reviewer_name(cp), user_name(up)))
	    change_fatal(cp, 0, i18n("not reviewer"));

	/*
	 * change the state
	 * remember who reviewed it
	 * add to the change's history
	 */
	cstate_data->state = cstate_state_awaiting_review;
	history_data = change_history_new(cp, up);
	history_data->what = cstate_history_what_review_begin_undo;
    }

    /*
     * write out the data and release the locks
     */
    change_cstate_write(cp);
    commit();
    lock_release();

    /*
     * run the notify command
     */
    change_run_review_begin_undo_notify_command(cp);

    /*
     * verbose success message
     */
    change_verbose(cp, 0, i18n("review begin undo complete"));
    change_free(cp);
    project_free(pp);
    user_free(up);
    trace(("}\n"));
}


void
review_begin_undo(void)
{
    static arglex_dispatch_ty dispatch[] =
    {
	{arglex_token_help, review_begin_undo_help, },
	{arglex_token_list, review_begin_undo_list, },
    };

    trace(("review_begin_undo()\n{\n"));
    arglex_dispatch(dispatch, SIZEOF(dispatch), review_begin_undo_main);
    trace(("}\n"));
}
