#!/bin/bash

toolName=calibre-web
toolPipName=calibreweb
toolDeps="python3-pip python3-venv"
toolFeatures=( metadata comics )

# Get script working directory
# (when called from a different directory)
WDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >>/dev/null 2>&1 && pwd)"
APTOPT=
CONFIG=0
SCRIPT_FILE=$(basename -- $0)
SCRIPT_NAME=${SCRIPT_FILE%%.*}
CONFIG_FILE_NAME="${SCRIPT_NAME}.cfg"
CONFIG_FILE_TEMPLATE="$WDIR/${CONFIG_FILE_NAME}.example"

seq_config() {
  ## or to use sequencer api with global config file:
  initSeqConfig "$CONFIG_FILE_NAME" "$CONFIG_FILE_TEMPLATE"
  if [ $? -eq 0 ] ; then
    CONFIG=1
  else
    # End if no configuration file exists
    dry || return -1
  fi

  ## Apt cmdline option to suppress user interaction
  quiet && APTOPT="-y"

  ## Return of non zero value will abort the sequence
  return 0
}

step_1_info() { echo "Install dependencies"; }
step_1_alias() { echo "install"; }
step_1() {
  exe apt install $toolDeps $APTOPT
}

step_2_info() { echo "Setup python virtual environment"; }
step_2() {
  if ! id $CALWEB_USER &>/dev/null; then
    exe adduser --disabled-password --disabled-login --home-dir "$CALWEB_USER_HOME" --gecos "" $CALWEB_USER
    exe usermod -aG users $CALWEB_USER
  else
    warning "User $CALWEB_USER already exists"
  fi
  if [ ! -e "$CALWEB_VENV_ROOT/bin" ]; then
    exe python3 -m venv "$CALWEB_VENV_ROOT"
    endReturn "Creating virtual environment failed"
    exe chown -R ${CALWEB_USER}: "$CALWEB_BASE"
  else
    warning "Virtual env. $CALWEB_VENV_ROOT already exists"
  fi
}

step_3_info() { echo "Install $toolName using pip"; }
step_3() {
  step upgradepip
  exe ${CALWEB_VENV_ROOT}/bin/pip install $toolPipName
}

step_4_info() {
  echo "Install $toolName features"
  echoinfo ${toolFeatures[*]}
}
step_4() {
  for i in "${!toolFeatures[@]}"; do
    toolFeatures[$i]="$toolPipName[${toolFeatures[$i]}]"
  done
  exe ${CALWEB_VENV_ROOT}/bin/pip install "${toolFeatures[@]}"
  # Needed for in-app update
  exe chown -R "${CALWEB_USER}": "${CALWEB_VENV_ROOT}/lib/python*/site-packages/calibreweb"
}

step_5_info() { echo "Install systemd service"; }
step_5() {
  addConf -s "$CALWEB_SERVICE" "$calweb_service_loc"
  [ $? -eq 0 ] && exe systemctl daemon-reload
}
calweb_service_name="calibreweb.service"
calweb_service_loc="/etc/systemd/system/$calweb_service_name"

step_6_info() { echo "Enable and start systemd service"; }
step_6() {
  exe systemctl enable $calweb_service_name --now
}

step_15_info() { echo "Upgrade python pip"; }
step_15_alias() { echo "upgradepip"; }
step_15()
{
  exe ${CALWEB_VENV_ROOT}/bin/pip install --upgrade pip
}

step_100_info() { echo "Setup notes"; }
step_100_alias() { echo "notes"; }
step_100() {
  color green
  cat <<NOTES_END
# Default admin login:

Username: admin
Password: admin123

# nginx reverse proxy

nginx configuration for a local server listening on port 8083:

server {
  client_max_body_size 20M;
  location / {
    proxy_bind              \$server_addr;
    proxy_pass              http://127.0.0.1:8083;
    proxy_set_header        Host            \$http_host;
    proxy_set_header        X-Forwarded-For \$proxy_add_x_forwarded_for;
    proxy_set_header        X-Scheme        \$scheme;
  }
}

## mapping Calibre-Web to a subfolder /calibre

Change/add the following lines in the configuration above:

location /calibre {
proxy_set_header        X-Script-Name   /calibre;  # IMPORTANT: path has NO trailing slash

NOTES_END
}

readonly sqr_minVersion=16
. /usr/local/bin/sequencer.sh