/*
   Copyright (c) 2010-2012 Red Hat, Inc. <http://www.redhat.com>
   This file is part of GlusterFS.

   This file is licensed to you under your choice of the GNU Lesser
   General Public License, version 3 or any later version (LGPLv3 or
   later), or the GNU General Public License, version 2 (GPLv2), in all
   cases as published by the Free Software Foundation.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <pthread.h>

#include "cli.h"
#include "cli-cmd.h"
#include "cli-mem-types.h"
#include "cli1-xdr.h"
#include "protocol-common.h"
#include <glusterfs/events.h>

int
cli_cmd_peer_help_cbk(struct cli_state *state, struct cli_cmd_word *in_word,
                      const char **words, int wordcount);

int
cli_cmd_peer_probe_cbk(struct cli_state *state, struct cli_cmd_word *word,
                       const char **words, int wordcount)
{
    int ret = -1;
    rpc_clnt_procedure_t *proc = NULL;
    call_frame_t *frame = NULL;
    dict_t *dict = NULL;
    int sent = 0;
    int parse_error = 0;
    cli_local_t *local = NULL;

    if (!(wordcount == 3)) {
        cli_usage_out(word->pattern);
        parse_error = 1;
        goto out;
    }

    proc = &cli_rpc_prog->proctable[GLUSTER_CLI_PROBE];

    dict = dict_new();
    if (!dict)
        goto out;

    ret = dict_set_str(dict, "hostname", (char *)words[2]);
    if (ret)
        goto out;

    ret = valid_internet_address((char *)words[2], _gf_false, _gf_false);
    if (ret == 1) {
        ret = 0;
    } else {
        cli_out("%s is an invalid address", words[2]);
        cli_usage_out(word->pattern);
        parse_error = 1;
        ret = -1;
        goto out;
    }
    /*        if (words[3]) {
                    ret = dict_set_str (dict, "port", (char *)words[3]);
                    if (ret)
                            goto out;
            }
    */

    frame = create_frame(THIS, THIS->ctx->pool);
    if (!frame) {
        ret = -1;
        goto out;
    }

    CLI_LOCAL_INIT(local, words, frame, dict);

    if (proc->fn) {
        ret = proc->fn(frame, THIS, dict);
    }

out:
    if (ret) {
        cli_cmd_sent_status_get(&sent);
        if ((sent == 0) && (parse_error == 0))
            cli_out("Peer probe failed");
    }

    CLI_STACK_DESTROY(frame);
    if (dict)
        dict_unref(dict);

    if (ret == 0) {
        gf_event(EVENT_PEER_ATTACH, "host=%s", (char *)words[2]);
    }

    return ret;
}

int
cli_cmd_peer_deprobe_cbk(struct cli_state *state, struct cli_cmd_word *word,
                         const char **words, int wordcount)
{
    int ret = -1;
    rpc_clnt_procedure_t *proc = NULL;
    call_frame_t *frame = NULL;
    dict_t *dict = NULL;
    int flags = 0;
    int sent = 0;
    int parse_error = 0;
    cli_local_t *local = NULL;
    gf_answer_t answer = GF_ANSWER_NO;
    const char *question = NULL;

    if ((wordcount < 3) || (wordcount > 4)) {
        cli_usage_out(word->pattern);
        parse_error = 1;
        goto out;
    }
    question =
        "All clients mounted through the peer which is getting detached need "
        "to be remounted using one of the other active peers in the trusted "
        "storage pool to ensure client gets notification on any changes done "
        "on the gluster configuration and if the same has been done do you "
        "want to proceed?";
    proc = &cli_rpc_prog->proctable[GLUSTER_CLI_DEPROBE];

    dict = dict_new();

    ret = dict_set_str(dict, "hostname", (char *)words[2]);
    if (ret)
        goto out;

    /*        if (words[3]) {
                    ret = dict_set_str (dict, "port", (char *)words[3]);
                    if (ret)
                            goto out;
            }
    */
    if (wordcount == 4) {
        if (!strcmp("force", words[3]))
            flags |= GF_CLI_FLAG_OP_FORCE;
        else {
            ret = -1;
            cli_usage_out(word->pattern);
            parse_error = 1;
            goto out;
        }
    }
    ret = dict_set_int32(dict, "flags", flags);
    if (ret)
        goto out;
    answer = cli_cmd_get_confirmation(state, question);
    if (GF_ANSWER_NO == answer) {
        ret = 0;
        goto out;
    }

    frame = create_frame(THIS, THIS->ctx->pool);
    if (!frame) {
        ret = -1;
        goto out;
    }

    CLI_LOCAL_INIT(local, words, frame, dict);

    if (proc->fn) {
        ret = proc->fn(frame, THIS, dict);
    }

out:
    if (ret) {
        cli_cmd_sent_status_get(&sent);
        if ((sent == 0) && (parse_error == 0))
            cli_out("Peer detach failed");
    }

    CLI_STACK_DESTROY(frame);
    if (dict)
        dict_unref(dict);

    if (ret == 0) {
        gf_event(EVENT_PEER_DETACH, "host=%s", (char *)words[2]);
    }

    return ret;
}

int
cli_cmd_peer_status_cbk(struct cli_state *state, struct cli_cmd_word *word,
                        const char **words, int wordcount)
{
    int ret = -1;
    rpc_clnt_procedure_t *proc = NULL;
    call_frame_t *frame = NULL;
    int sent = 0;
    int parse_error = 0;

    if (wordcount != 2) {
        cli_usage_out(word->pattern);
        parse_error = 1;
        goto out;
    }

    proc = &cli_rpc_prog->proctable[GLUSTER_CLI_LIST_FRIENDS];

    frame = create_frame(THIS, THIS->ctx->pool);
    if (!frame)
        goto out;

    if (proc->fn) {
        ret = proc->fn(frame, THIS, (void *)GF_CLI_LIST_PEERS);
    }

out:
    if (ret) {
        cli_cmd_sent_status_get(&sent);
        if ((sent == 0) && (parse_error == 0))
            cli_out("Peer status failed");
    }

    CLI_STACK_DESTROY(frame);

    return ret;
}

int
cli_cmd_pool_list_cbk(struct cli_state *state, struct cli_cmd_word *word,
                      const char **words, int wordcount)
{
    int ret = -1;
    rpc_clnt_procedure_t *proc = NULL;
    call_frame_t *frame = NULL;
    int sent = 0;
    int parse_error = 0;

    if (wordcount != 2) {
        cli_usage_out(word->pattern);
        parse_error = 1;
        goto out;
    }

    proc = &cli_rpc_prog->proctable[GLUSTER_CLI_LIST_FRIENDS];

    frame = create_frame(THIS, THIS->ctx->pool);
    if (!frame)
        goto out;

    if (proc->fn) {
        ret = proc->fn(frame, THIS, (void *)GF_CLI_LIST_POOL_NODES);
    }

out:
    if (ret) {
        cli_cmd_sent_status_get(&sent);
        if ((sent == 0) && (parse_error == 0))
            cli_err("pool list: command execution failed");
    }

    CLI_STACK_DESTROY(frame);

    return ret;
}

struct cli_cmd cli_probe_cmds[] = {
    {"peer probe { <HOSTNAME> | <IP-address> }", cli_cmd_peer_probe_cbk,
     "probe peer specified by <HOSTNAME>"},

    {"peer detach { <HOSTNAME> | <IP-address> } [force]",
     cli_cmd_peer_deprobe_cbk, "detach peer specified by <HOSTNAME>"},

    {"peer status", cli_cmd_peer_status_cbk, "list status of peers"},

    {"peer help", cli_cmd_peer_help_cbk, "display help for peer commands"},

    {"pool list", cli_cmd_pool_list_cbk,
     "list all the nodes in the pool (including localhost)"},

    {NULL, NULL, NULL}};

int
cli_cmd_peer_help_cbk(struct cli_state *state, struct cli_cmd_word *in_word,
                      const char **words, int wordcount)
{
    struct cli_cmd *cmd = NULL;
    struct cli_cmd *probe_cmd = NULL;
    int count = 0;

    cli_out("\ngluster peer commands");
    cli_out("======================\n");

    cmd = GF_MALLOC(sizeof(cli_probe_cmds), cli_mt_cli_cmd);
    memcpy(cmd, cli_probe_cmds, sizeof(cli_probe_cmds));
    count = (sizeof(cli_probe_cmds) / sizeof(struct cli_cmd));
    cli_cmd_sort(cmd, count);

    for (probe_cmd = cmd; probe_cmd->pattern; probe_cmd++)
        cli_out("%s - %s", probe_cmd->pattern, probe_cmd->desc);

    GF_FREE(cmd);

    cli_out("\n");
    return 0;
}

int
cli_cmd_probe_register(struct cli_state *state)
{
    int ret = 0;
    struct cli_cmd *cmd = NULL;

    for (cmd = cli_probe_cmds; cmd->pattern; cmd++) {
        ret = cli_cmd_register(&state->tree, cmd);
        if (ret)
            goto out;
    }
out:
    return ret;
}
