# Function to setup environment for self-hosted runners.
self_hosted_helper() {
  if ! command -v apt-fast >/dev/null; then
    sudo ln -sf /usr/bin/apt-get /usr/bin/apt-fast
  fi
  install_packages curl make software-properties-common unzip autoconf automake gcc g++
  add_ppa ondrej/php
}

# Function to backup and cleanup package lists.
cleanup_lists() {
  ppa_prefix=${1-ondrej}
  if [ ! -e /etc/apt/sources.list.d.save ]; then
    sudo mv /etc/apt/sources.list.d /etc/apt/sources.list.d.save
    sudo mkdir /etc/apt/sources.list.d
    sudo mv /etc/apt/sources.list.d.save/*"${ppa_prefix}"*.list /etc/apt/sources.list.d/
    trap "sudo mv /etc/apt/sources.list.d.save/*.list /etc/apt/sources.list.d/ 2>/dev/null" exit
  fi
}

# Function to add ppa:ondrej/php.
add_ppa() {
  ppa=${1:-ondrej/php}
  if ! apt-cache policy | grep -q "$ppa"; then
    cleanup_lists "$(dirname "$ppa")"
    LC_ALL=C.UTF-8 sudo apt-add-repository ppa:"$ppa" -y
    if [ "$DISTRIB_RELEASE" = "16.04" ]; then
      sudo "$debconf_fix" apt-get update
    fi
  fi
}

# Function to update the package lists.
update_lists() {
  if [ ! -e /tmp/setup_php ]; then
    [ "$DISTRIB_RELEASE" = "20.04" ] && add_ppa >/dev/null 2>&1
    cleanup_lists
    sudo "$debconf_fix" apt-get update >/dev/null 2>&1
    echo '' | sudo tee /tmp/setup_php >/dev/null 2>&1
  fi
}

# Function to install a package
install_packages() {
  packages=("$@")
  $apt_install "${packages[@]}" >/dev/null 2>&1 || update_lists && $apt_install "${packages[@]}" >/dev/null 2>&1
}

# Function to disable an extension.
disable_extension() {
  extension=$1
  sudo sed -Ei "/=(.*\/)?\"?$extension(.so)?$/d" "${ini_file[@]}"
  sudo sed -Ei "/=(.*\/)?\"?$extension(.so)?$/d" "$pecl_file"
  sudo find "$ini_dir"/.. -name "*$extension.ini" -delete >/dev/null 2>&1 || true
}

# Function to delete an extension.
delete_extension() {
  extension=$1
  disable_extension "$extension"
  sudo rm -rf "$ext_dir"/"$extension".so >/dev/null 2>&1
  if [ "${runner:?}" = "self-hosted" ]; then
    $apt_remove "php-$extension" "php$version-$extension" >/dev/null 2>&1 || true
  fi
}

# Function to disable and delete extensions.
remove_extension() {
  extension=$1
  if check_extension "$extension"; then
    if [[ ! "$version" =~ ${old_versions:?} ]] && [ -e /etc/php/"$version"/mods-available/"$extension".ini ]; then
      sudo phpdismod -v "$version" "$extension" >/dev/null 2>&1
      echo "$extension" | sudo tee -a /tmp/setup_php_dismod >/dev/null 2>&1
    fi
    delete_extension "$extension"
    (! check_extension "$extension" && add_log "${tick:?}" ":$extension" "Removed") ||
      add_log "${cross:?}" ":$extension" "Could not remove $extension on PHP ${semver:?}"
  else
    delete_extension "$extension"
    add_log "${tick:?}" ":$extension" "Could not find $extension on PHP $semver"
  fi
}

# Function to add PDO extension.
add_pdo_extension() {
  pdo_ext="pdo_$1"
  if check_extension "$pdo_ext"; then
    add_log "${tick:?}" "$pdo_ext" "Enabled"
  else
    ext=$1
    ext_name=$1
    disable_extension pdo
    echo "extension=pdo.so" | sudo tee "${ini_file[@]/php.ini/conf.d/10-pdo.ini}" >/dev/null 2>&1
    if [ "$ext" = "mysql" ]; then
      enable_extension "mysqlnd" "extension"
      ext_name='mysqli'
    elif [ "$ext" = "dblib" ]; then
      ext_name="sybase"
    elif [ "$ext" = "firebird" ]; then
      install_packages libfbclient2 >/dev/null 2>&1
      enable_extension "pdo_firebird" "extension"
      ext_name="interbase"
    elif [ "$ext" = "sqlite" ]; then
      ext="sqlite3"
      ext_name="sqlite3"
    fi
    add_extension "$ext_name" "extension" >/dev/null 2>&1
    add_extension "$pdo_ext" "extension" >/dev/null 2>&1
    add_extension_log "$pdo_ext" "Enabled"
  fi
}

# Function to add extensions.
add_extension() {
  extension=$1
  prefix=$2
  enable_extension "$extension" "$prefix"
  if check_extension "$extension"; then
    add_log "${tick:?}" "$extension" "Enabled"
  else
    if [[ "$version" =~ ${nightly_versions:?} ]]; then
      pecl_install "$extension"
    else
      install_packages "php$version-$extension" || pecl_install "$extension"
    fi
    add_extension_log "$extension" "Installed and enabled"
  fi
  sudo chmod 777 "${ini_file[@]}"
}

# Function to install a PECL version.
add_pecl_extension() {
  extension=$1
  pecl_version=$2
  prefix=$3
  if [[ $pecl_version =~ .*(alpha|beta|rc|snapshot|preview).* ]]; then
    pecl_version=$(get_pecl_version "$extension" "$pecl_version")
  fi
  enable_extension "$extension" "$prefix"
  ext_version=$(php -r "echo phpversion('$extension');")
  if [ "$ext_version" = "$pecl_version" ]; then
    add_log "${tick:?}" "$extension" "Enabled"
  else
    delete_extension "$extension"
    pecl_install "$extension-$pecl_version"
    add_extension_log "$extension-$pecl_version" "Installed and enabled"
  fi
}

# Function to setup phpize and php-config.
add_devtools() {
  tool=$1
  if ! command -v "$tool$version" >/dev/null; then
    install_packages "php$version-dev" "php$version-xml"
  fi
  sudo update-alternatives --set php-config /usr/bin/php-config"$version" >/dev/null 2>&1
  sudo update-alternatives --set phpize /usr/bin/phpize"$version" >/dev/null 2>&1
  configure_pecl >/dev/null 2>&1
  add_log "${tick:?}" "$tool" "Added $tool $semver"
}

# Function to setup the nightly build from shivammathur/php-builder
setup_nightly() {
  run_script "php-builder" "$runner" "$version"
  extra_version="-dev ($(cat "/etc/php/$version/COMMIT"))"
}

# Function to setup PHP 5.3, PHP 5.4 and PHP 5.5.
setup_old_versions() {
  run_script "php5-ubuntu" "$version"
}

# Function to add PECL.
add_pecl() {
  add_devtools phpize >/dev/null 2>&1
  if ! command -v pecl >/dev/null; then
    install_packages php-pear
  fi
  configure_pecl >/dev/null 2>&1
  pecl_version=$(get_tool_version "pecl" "version")
  add_log "${tick:?}" "PECL" "Added PECL $pecl_version"
}

# Function to switch versions of PHP binaries.
switch_version() {
  for tool in pear pecl php phar phar.phar php-cgi php-config phpize phpdbg; do
    if [ -e "/usr/bin/$tool$version" ]; then
      sudo update-alternatives --set $tool /usr/bin/"$tool$version" &
      to_wait+=($!)
    fi
  done
  wait "${to_wait[@]}"
}

# Function to install packaged PHP
add_packaged_php() {
  if [ "$runner" = "self-hosted" ] || [ "${use_package_cache:-true}" = "false" ]; then
    update_lists
    IFS=' ' read -r -a packages <<<"$(echo "cli curl mbstring xml intl" | sed "s/[^ ]*/php$version-&/g")"
    $apt_install "${packages[@]}"
  else
    run_script "php-ubuntu" "$version"
  fi
}

# Function to update PHP.
update_php() {
  initial_version=$(php_semver)
  add_packaged_php
  updated_version=$(php_semver)
  if [ "$updated_version" != "$initial_version" ]; then
    status="Updated to"
  else
    status="Switched to"
  fi
}

# Function to install PHP.
add_php() {
  if [[ "$version" =~ ${nightly_versions:?} ]]; then
    setup_nightly
  elif [[ "$version" =~ ${old_versions:?} ]]; then
    setup_old_versions
  else
    add_packaged_php
  fi
  status="Installed"
}

# Function to ini file for pear and link it to each SAPI.
link_pecl_file() {
  echo '' | sudo tee "$pecl_file" >/dev/null 2>&1
  for file in "${ini_file[@]}"; do
    sapi_scan_dir="$(realpath -m "$(dirname "$file")")/conf.d"
    [ "$sapi_scan_dir" != "$scan_dir" ] && ! [ -h "$sapi_scan_dir" ] && sudo ln -sf "$pecl_file" "$sapi_scan_dir/99-pecl.ini"
  done
}

# Function to Setup PHP
setup_php() {
  step_log "Setup PHP"
  sudo mkdir -m 777 -p /var/run /run/php
  if [ "$(php-config --version 2>/dev/null | cut -c 1-3)" != "$version" ]; then
    if [ ! -e "/usr/bin/php$version" ]; then
      add_php >/dev/null 2>&1
    else
      if [ "${update:?}" = "true" ]; then
        update_php >/dev/null 2>&1
      else
        status="Switched to"
      fi
    fi
    if ! [[ "$version" =~ ${old_versions:?}|${nightly_versions:?} ]]; then
      switch_version >/dev/null 2>&1
    fi
  else
    if [ "$update" = "true" ]; then
      update_php >/dev/null 2>&1
    else
      status="Found"
    fi
  fi
  if ! command -v php"$version" >/dev/null; then
    add_log "$cross" "PHP" "Could not setup PHP $version"
    exit 1
  fi
  semver=$(php_semver)
  ext_dir=$(php -i | grep "extension_dir => /" | sed -e "s|.*=> s*||")
  scan_dir=$(php --ini | grep additional | sed -e "s|.*: s*||")
  ini_dir=$(php --ini | grep "(php.ini)" | sed -e "s|.*: s*||")
  pecl_file="$scan_dir"/99-pecl.ini
  mapfile -t ini_file < <(sudo find "$ini_dir/.." -name "php.ini" -exec readlink -m {} +)
  link_pecl_file
  configure_php
  sudo rm -rf /usr/local/bin/phpunit >/dev/null 2>&1
  sudo chmod 777 "${ini_file[@]}" "$pecl_file" "${tool_path_dir:?}"
  sudo cp "$dist"/../src/configs/*.json "$RUNNER_TOOL_CACHE/"
  add_log "${tick:?}" "PHP" "$status PHP $semver$extra_version"
}

# Variables
version=$1
dist=$2
debconf_fix="DEBIAN_FRONTEND=noninteractive"
apt_install="sudo $debconf_fix apt-fast install -y"
apt_remove="sudo $debconf_fix apt-fast remove -y"
scripts="${dist}"/../src/scripts

# shellcheck source=.
. "${scripts:?}"/ext/source.sh
. "${scripts:?}"/tools/add_tools.sh
. "${scripts:?}"/common.sh
. /etc/lsb-release
read_env
self_hosted_setup
setup_php