#!/bin/bash
set -uo pipefail
#==============================================================#
# File      :   redis-rm
# Desc      :   Remove Redis Cluster/Node/Instance
# Ctime     :   2022-12-29
# Mtime     :   2023-09-14
# Path      :   bin/redis-rm
# Deps      :   ansible-playbook, redis-rm.yml
# License   :   Apache-2.0 @ https://pigsty.io/docs/about/license/
# Copyright :   2018-2026  Ruohang Feng / Vonng (rh@vonng.com)
#==============================================================#
APP_NAME="$(basename $0)"
APP_DIR="$(cd $(dirname $0) && pwd)"
PIGSTY_HOME=$(cd $(dirname ${APP_DIR}) && pwd)


#--------------------------------------------------------------#
# Usage
#--------------------------------------------------------------#
# bin/redis-rm <cluster|ip> [...port]
#
# if ports are specified, only those corresponding instances will be removed
#
# Examples:
#   bin/redis-rm redis-ms                # remove a redis cluster
#   bin/redis-rm 10.10.10.10             # remove a redis-node
#   bin/redis-rm 10.10.10.10 6379 6380   # remove specific redis instances


#--------------------------------------------------------------#
# Utils
#--------------------------------------------------------------#
__CN='\033[0m';__CK='\033[0;30m';__CR='\033[0;31m';__CG='\033[0;32m';
__CY='\033[0;33m';__CB='\033[0;34m';__CM='\033[0;35m';__CC='\033[0;36m';__CW='\033[0;37m';
function log_info() {  printf "[${__CG} OK ${__CN}] ${__CG}$*${__CN}\n";   }
function log_warn() {  printf "[${__CY}WARN${__CN}] ${__CY}$*${__CN}\n";   }
function log_error() { printf "[${__CR}FAIL${__CN}] ${__CR}$*${__CN}\n";   }
function log_debug() { printf "[${__CB}HINT${__CN}] ${__CB}$*${__CN}\n"; }
function log_input() { printf "[${__CM} IN ${__CN}] ${__CM}$*\n=> ${__CN}"; }
function log_hint()  { printf "${__CB}$*${__CN}\n"; }
function log_line()  { printf "${__CM}[$*] ===========================================${__CN}\n"; }
function is_valid_ip(){
    if [[ "$1" =~ (([0-9]|[0-9]{2}|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[0-9]{2}|1[0-9]{2}|2[0-4][0-9]|25[0-5]) ]]; then
        return 0
    else
        return 1
    fi
}

#--------------------------------------------------------------#
# Param
#--------------------------------------------------------------#
REDIS_SELECTOR=${1-''}
log_info "redis selector: ${REDIS_SELECTOR}"

if [[ -z "${REDIS_SELECTOR}" ]]; then
	log_error "redis selector is empty"
	log_hint "bin/redis-rm <cls|ip> [port...]"
	exit 1
fi
HOST_TYPE='cluster'
if is_valid_ip "${REDIS_SELECTOR}"; then
  HOST_TYPE='node'
fi

#--------------------------------------------------------------#
# Remove Redis Cluster/Node      [ 1 arg = remove cluster/node ]
#--------------------------------------------------------------#
if (($# == 1)); then
	log_line "EXECUTE"
	log_warn "remove redis ${HOST_TYPE} ${REDIS_SELECTOR}"
	log_hint "$ ./redis.yml" -l "${REDIS_SELECTOR}"

	"${PIGSTY_HOME}/redis-rm.yml" -l "${REDIS_SELECTOR}"

  if [[ $? -ne 0 ]]; then
    log_line "FAILURE"
    log_error "unable to remove redis ${HOST_TYPE} ${REDIS_SELECTOR}"
    exit 2
  fi
  log_line "SUMMARY"
	log_info "remove redis ${HOST_TYPE} ${REDIS_SELECTOR} complete"
	exit 0
fi


#--------------------------------------------------------------#
# Remove Redis Instances           [2+ args = remove instances ]
#--------------------------------------------------------------#

#---------------------------------#
# Check Param Agent
#---------------------------------#
if ! is_valid_ip "${REDIS_SELECTOR}"; then
  log_error "you have to use bin/redis-rm <ip> [port...] format"
  exit 3
fi

for ((i=2; i<=$#; i++))
do
  if (( ${!i} < 1024 || ${!i} > 65535 )); then
    log_error "invalid port number given: ${!i}"
    exit 3
  fi
done

#---------------------------------#
# Planning
#---------------------------------#
log_line "PLANNING"
log_info "remove redis instances:"
for ((i=2; i<=$#; i++))
do
    log_info "  - ${REDIS_SELECTOR}:${!i}"
done

#---------------------------------#
# Remove Redis Instance One by One
#---------------------------------#
for ((i=2; i<=$#; i++))
do

    log_line "EXECUTE"
    log_info "remove redis instance: ${REDIS_SELECTOR}:${!i}"
    log_hint "$ ./redis-rm.yml" -l "${REDIS_SELECTOR}" -e "redis_port=${!i}"

    "${PIGSTY_HOME}/redis-rm.yml" -l "${REDIS_SELECTOR}" -e "redis_port=${!i}"

    if [[ $? -ne 0 ]]; then
      log_line "FAILURE"
      log_error "unable to remove redis instance ${REDIS_SELECTOR}:${!i}"
      exit 4
    fi
    log_info "remove redis instance: ${REDIS_SELECTOR}:${!i} complete"

done