/* $OpenBSD$ */

/*
* Copyright (c) 2009 Tiago Cunha <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <sys/types.h>

#include <stdlib.h>
#include <time.h>

#include "tmux.h"

/*
* Displays a message in the status line.
*/

#define DISPLAY_MESSAGE_TEMPLATE                        \
       "[#{session_name}] #{window_index}:"            \
       "#{window_name}, current pane #{pane_index} "   \
       "- (%H:%M %d-%b-%y)"

static enum cmd_retval  cmd_display_message_exec(struct cmd *,
                           struct cmdq_item *);

const struct cmd_entry cmd_display_message_entry = {
       .name = "display-message",
       .alias = "display",

       .args = { "ac:d:lINpt:F:v", 0, 1, NULL },
       .usage = "[-aIlNpv] [-c target-client] [-d delay] [-F format] "
                CMD_TARGET_PANE_USAGE " [message]",

       .target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },

       .flags = CMD_AFTERHOOK|CMD_CLIENT_CFLAG|CMD_CLIENT_CANFAIL,
       .exec = cmd_display_message_exec
};

static void
cmd_display_message_each(const char *key, const char *value, void *arg)
{
       struct cmdq_item        *item = arg;

       cmdq_print(item, "%s=%s", key, value);
}

static enum cmd_retval
cmd_display_message_exec(struct cmd *self, struct cmdq_item *item)
{
       struct args             *args = cmd_get_args(self);
       struct cmd_find_state   *target = cmdq_get_target(item);
       struct client           *tc = cmdq_get_target_client(item), *c;
       struct session          *s = target->s;
       struct winlink          *wl = target->wl;
       struct window_pane      *wp = target->wp;
       const char              *template;
       char                    *msg, *cause;
       int                      delay = -1, flags, Nflag = args_has(args, 'N');
       struct format_tree      *ft;
       u_int                    count = args_count(args);
       struct evbuffer         *evb;

       if (args_has(args, 'I')) {
               if (wp == NULL)
                       return (CMD_RETURN_NORMAL);
               switch (window_pane_start_input(wp, item, &cause)) {
               case -1:
                       cmdq_error(item, "%s", cause);
                       free(cause);
                       return (CMD_RETURN_ERROR);
               case 1:
                       return (CMD_RETURN_NORMAL);
               case 0:
                       return (CMD_RETURN_WAIT);
               }
       }

       if (args_has(args, 'F') && count != 0) {
               cmdq_error(item, "only one of -F or argument must be given");
               return (CMD_RETURN_ERROR);
       }

       if (args_has(args, 'd')) {
               delay = args_strtonum(args, 'd', 0, UINT_MAX, &cause);
               if (cause != NULL) {
                       cmdq_error(item, "delay %s", cause);
                       free(cause);
                       return (CMD_RETURN_ERROR);
               }
       }

       if (count != 0)
               template = args_string(args, 0);
       else
               template = args_get(args, 'F');
       if (template == NULL)
               template = DISPLAY_MESSAGE_TEMPLATE;

       /*
        * -c is intended to be the client where the message should be
        * displayed if -p is not given. But it makes sense to use it for the
        * formats too, assuming it matches the session. If it doesn't, use the
        * best client for the session.
        */
       if (tc != NULL && tc->session == s)
               c = tc;
       else if (s != NULL)
               c = cmd_find_best_client(s);
       else
               c = NULL;
       if (args_has(args, 'v'))
               flags = FORMAT_VERBOSE;
       else
               flags = 0;
       ft = format_create(cmdq_get_client(item), item, FORMAT_NONE, flags);
       format_defaults(ft, c, s, wl, wp);

       if (args_has(args, 'a')) {
               format_each(ft, cmd_display_message_each, item);
               return (CMD_RETURN_NORMAL);
       }

       if (args_has(args, 'l'))
               msg = xstrdup(template);
       else
               msg = format_expand_time(ft, template);

       if (cmdq_get_client(item) == NULL)
               cmdq_error(item, "%s", msg);
       else if (args_has(args, 'p'))
               cmdq_print(item, "%s", msg);
       else if (tc != NULL && (tc->flags & CLIENT_CONTROL)) {
               evb = evbuffer_new();
               if (evb == NULL)
                       fatalx("out of memory");
               evbuffer_add_printf(evb, "%%message %s", msg);
               server_client_print(tc, 0, evb);
               evbuffer_free(evb);
       } else if (tc != NULL)
               status_message_set(tc, delay, 0, Nflag, "%s", msg);
       free(msg);

       format_free(ft);

       return (CMD_RETURN_NORMAL);
}