#!/usr/bin/env bash

# CONSTANTS
readonly IMAGEDIR=${ROOTPATH}/image

##
# checks if the defined image exists already
# 
# ${1} - string: software-name
# ${2} - string: mc-version
# ${3} - string: build-number
##
function checkImage() {
  [[ -n $(podman image ls | grep "${2}/${1}" | grep "${3}") ]] && echo true || echo false
}

##
# checks if the passed data is up-to-date
# 
# ${1} - string: software-name
# ${2} - string: mc-version
# ${3} - string: build-number
# ${4} - string: runner-type
##
function checkUpdate() {
  case "${4}" in
    "server")
      local remotebuild=$(curl -s "$(getValueByKey SERVERRUNNERS.${1})/versions/${2}" | jq -r '.builds | last')
    ;;
    "proxy")
      local remotebuild=$(curl -s "$(getValueByKey PROXYRUNNERS.${1})/versions/${2}" | jq -r '.builds | last')
    ;;
  esac
  if [[ "${3}" == "${remotebuild}" ]]; then
    echo false
  else
    echo true
  fi
}

##
# updates the config-file to the latest build
# 
# ${1} - string: software-name
# ${2} - string: mc-version
# ${3} - string: config-dir
# ${4} - string: runner-type
##
function updateBuild() {  
    case "${4}" in
      "server")
        local latest=$(curl -s "$(getValueByKey SERVERRUNNERS.${1})/versions/${2}" | jq -r '.builds | last')
      ;;
      "proxy")
        local latest=$(curl -s "$(getValueByKey PROXYRUNNERS.${1})/versions/${2}" | jq -r '.builds | last')
      ;;
    esac
  log d "Updating build-no. to '${latest}'"
  setLocalConfValue "${3}" "(.build=${latest})"
}

##
# builds the podman image with the proper settings
# 
# ${1} - string: software-name
# ${2} - string: mc-version
# ${3} - string: build-number
# ${4} - string: download-url
#
##
function buildImage() {
  log d "lookup jar-name for download"
  local app_name=$(curl -s "${4}" | jq -r '.downloads.application.name')

  log d "downloading server.jar"
  cp "${ROOTPATH}"/image/* "${BUILDDIR}/"
  curl "${4}/downloads/${app_name}" -o "${BUILDDIR}/server.jar"

  log d "building docker image"
  podman build --rm "${BUILDDIR}" --tag "${2}/${1}:${3}"
  [[ $? -eq 0 ]] && log s "Image '${2}/${1}:${3}' built!"

  log d "removing temporary build-dir"
  [[ -f "${BUILDDIR}" ]] && rm -rf "${BUILDDIR}"
}

##
# starts the specified container
#
# ${1} - string: containername
# ${2} - string: image
# ${3} - int: port
##
function startContainer() {
  log d "Starting container '${1}'"

  local dir="$(getValueByKey 'PODMAN_DIRECTORY')/${1}"
  sed -i "s/^rcon.password=.*/rcon.password=$(tr -cd '[:alnum:]' < /dev/urandom | fold -w12 | head -n1)/" $dir/data/server.properties

  readarray -t additional_ports <<< "$(getLocalConfValue $dir 'additional_ports[]')"
  [[ ${#additional_ports} -gt 0 ]] && log d "Starting with additional ports: ${additional_ports[@]}"
  podman run --replace --name "${1}" --userns=keep-id:uid=1000 --rm -it -d --network "${5}" -p $([[ -n "${4}" ]] && echo ${4}:)${3}:25565 $([[ ${#additional_ports} -gt 0 ]] && for port in "${additional_ports[@]}"; do echo "-p $([[ -n ${4} ]] && echo ${4}:)${port}:${port}"; done) -v $dir/data:/var/server "${2}" java -Dcom.mojang.eula.agree=true -jar /var/exec/server.jar --nogui --port 25565
  [[ $? -eq 0 ]] && log s "Container '${1}' started!"
}

##
# stops the specified container
#
# ${1} - string: containername
##
function stopContainer() {
  log d "Stopping container '${1}'"
  podman container stop --time 100 ${1}

  local dir="$(getValueByKey 'PODMAN_DIRECTORY')/${1}"  
  sed -i "s/^rcon.password=.*/rcon.password=/" $dir/data/server.properties

  log s "Container '${1}' stopped"
}

##
# create a podman network
#
# ${1} - string: network-name
##
function createNetwork() {
  if [[ -z "${1}" ]]; then
    log e "Network name is unspecified. Please provide a network-name!"
    exit 1
  fi
  if [[ -n $(podman network ls | grep "${1}") ]]; then
    log w "Network '${1}' exists already, won't create!"
    return 1
  fi
  podman network create "${1}"
}