#!/bin/bash

#=================================================
# COMMON VARIABLES
#=================================================

## new filenames starting 0.00~ynh5
# make a filename/service name from domain/path
if [[ "$path" == /* ]]; then 
  url_path="${path:1}"
fi
if [[ "__${url_path}__" == '____' ]]; then
  flohmarkt_filename="$domain"
else
  flohmarkt_filename="$domain-${url_path}"
fi
# this filename is used for logfile name and systemd.service name
# and for symlinking install_dir and data_dir
flohmarkt_filename="${YNH_APP_ID}_${flohmarkt_filename//[^A-Za-z0-9._-]/_}"
# directory flohmarkts software is installed to
# contains ./venv and ./src as sub-directories
flohmarkt_install="$install_dir"
flohmarkt_sym_install="$( dirname $flohmarkt_install )/$flohmarkt_filename"
flohmarkt_venv_dir="${flohmarkt_install}/venv"
flohmarkt_app_dir="${flohmarkt_install}/app"
# directory containing logfiles
flohmarkt_log_dir="/var/log/${app}"
flohmarkt_sym_log_dir="/var/log/${flohmarkt_filename}"
# filename for logfiles - ¡ojo! if not ends with .log will be interpreted
# as a directory by ynh_use_logrotate
# https://github.com/YunoHost/issues/issues/2383
flohmarkt_logfile="${flohmarkt_log_dir}/app.log"
# flohmarkt data_dir
flohmarkt_data_dir="$data_dir"
flohmarkt_sym_data_dir="$( dirname $flohmarkt_data_dir )/$flohmarkt_filename"

## old filenames before 0.00~ynh5 - for reference and needed to
# migrate (see below)
flohmarkt_old_install="/opt/flohmarkt"
flohmarkt_old_venv_dir="${flohmarkt_old_install}/venv"
flohmarkt_old_app_dir="${flohmarkt_old_install}/flohmarkt"
flohmarkt_old_log_dir="/var/log/flohmarkt/"
flohmarkt_old_service="flohmarkt"

#=================================================
# PERSONAL HELPERS
#=================================================

# local copy of ynh_local_curl() to test some improvement
# https://github.com/YunoHost/issues/issues/2396
# https://codeberg.org/flohmarkt/flohmarkt_ynh/issues/51
flohmarkt_ynh_local_curl() {
# Curl abstraction to help with POST requests to local pages (such as installation forms)
#
# usage: ynh_local_curl "page_uri" "key1=value1" "key2=value2" ...
# | arg: page_uri    - Path (relative to `$path_url`) of the page where POST data will be sent
# | arg: key1=value1 - (Optionnal) POST key and corresponding value
# | arg: key2=value2 - (Optionnal) Another POST key and corresponding value
# | arg: ...         - (Optionnal) More POST keys and values
#
# example: ynh_local_curl "/install.php?installButton" "foo=$var1" "bar=$var2"
#
# For multiple calls, cookies are persisted between each call for the same app
#
# `$domain` and `$path_url` should be defined externally (and correspond to the domain.tld and the /path (of the app?))
#
# Requires YunoHost version 2.6.4 or higher.
    # Define url of page to curl
    local local_page=$(ynh_normalize_url_path $1)
    local full_path=$path_url$local_page

    if [ "${path_url}" == "/" ]; then
        full_path=$local_page
    fi

    local full_page_url=https://localhost$full_path

    # Concatenate all other arguments with '&' to prepare POST data
    local POST_data=""
    local arg=""
    for arg in "${@:2}"; do
        POST_data="${POST_data}${arg}&"
    done
    if [ -n "$POST_data" ]; then
        # Add --data arg and remove the last character, which is an unecessary '&'
        POST_data="--data ${POST_data::-1}"
    fi

    # Wait untils nginx has fully reloaded (avoid curl fail with http2)
    sleep 2

    local cookiefile=/tmp/ynh-$app-cookie.txt
    touch $cookiefile
    chown root $cookiefile
    chmod 700 $cookiefile

    # Temporarily enable visitors if needed...
    local visitors_enabled=$(ynh_permission_has_user "main" "visitors" && echo yes || echo no)
    if [[ $visitors_enabled == "no" ]]; then
        ynh_permission_update --permission "main" --add "visitors"
    fi

    # Curl the URL
    curl --silent --show-error --insecure --location --header "Host: $domain" --resolve $domain:443:127.0.0.1 $POST_data "$full_page_url" --cookie-jar $cookiefile --cookie $cookiefile

    if [[ $visitors_enabled == "no" ]]; then
        ynh_permission_update --permission "main" --remove "visitors"
    fi
}

# create symlinks containing domain and path for install, data and log directories
flohmarkt_ynh_create_symlinks() {
  ynh_script_progression --message="Creating symlinks..." --weight=1
  ln -s "$flohmarkt_install" "$flohmarkt_sym_install"
  ln -s "$flohmarkt_data_dir" "$flohmarkt_sym_data_dir"
  ln -s "$flohmarkt_log_dir" "$flohmarkt_sym_log_dir"
  true
}

# set file permissions and owner for installation
flohmarkt_ynh_set_permission() {
  # install dir - only root needs to write and $app reads
  chown root:$app -R "$flohmarkt_install"
  chmod g-w,o-rwx -R "$flohmarkt_install"
}

# start flohmarkt service
flohmarkt_ynh_start_service() {
  ynh_systemd_action --service_name=$flohmarkt_filename --action="start"  \
    --line_match='INFO: *Application startup complete.' --log_path="$flohmarkt_logfile" \
    --timeout=30
}

# stop flohmarkt service
flohmarkt_ynh_stop_service() {
  ynh_systemd_action --service_name=$flohmarkt_filename --action="stop"
}

# start couchdb and wait for success
flohmarkt_ynh_start_couchdb() {
  ynh_systemd_action --service_name=couchdb --action="start" --timeout=30 \
    --log_path="/var/log/couchdb/couchdb.log" \
    --line_match='Apache CouchDB has started on http://127.0.0.1'
}

# stop couchdb
flohmarkt_ynh_stop_couchdb() {
  ynh_systemd_action --service_name=couchdb --action="stop" --timeout=30 \
    --log_path="/var/log/couchdb/couchdb.log" \
    --line_match='SIGTERM received - shutting down'
}

# install or upgrade couchdb
flohmarkt_ynh_up_inst_couchdb() {
  echo "\
  couchdb couchdb/mode select standalone
  couchdb couchdb/mode seen true
  couchdb couchdb/bindaddress string 127.0.0.1
  couchdb couchdb/bindaddress seen true
  couchdb couchdb/cookie string $couchdb_magic_cookie
  couchdb couchdb/adminpass password $password_couchdb_admin
  couchdb couchdb/adminpass seen true
  couchdb couchdb/adminpass_again password $password_couchdb_admin
  couchdb couchdb/adminpass_again seen true" | debconf-set-selections
  DEBIAN_FRONTEND=noninteractive # apt-get install -y --force-yes couchdb
  ynh_install_extra_app_dependencies \
          --repo="deb https://apache.jfrog.io/artifactory/couchdb-deb/ $(lsb_release -c -s) main" \
          --key="https://couchdb.apache.org/repo/keys.asc" \
          --package="couchdb"
}

flohmarkt_ynh_dump_couchdb() {
  ../settings/scripts/couchdb-dump/couchdb-dump.sh -b -H 127.0.0.1 -d "${app}" \
    -q -u admin -p "${password_couchdb_admin}" -f "${YNH_CWD}/${app}.json"
}

flohmarkt_ynh_import_couchdb() {
  ls -l ../settings/scripts/couchdb-dump/couchdb-dump.sh ${YNH_CWD}/${app}.json
  ../settings/scripts/couchdb-dump/couchdb-dump.sh -r -c -H 127.0.0.1 -d "${app}" \
    -q -u admin -p "${password_couchdb_admin}" -f "${YNH_CWD}/${app}.json"
}

flohmarkt_ynh_delete_couchdb_user() {
  # https://codeberg.org/flohmarkt/flohmarkt_ynh/issues/46 - more than one revision?
  local couchdb_user_revision=$( curl -sX GET "http://127.0.0.1:5984/_users/org.couchdb.user%3A${app}" \
    --user "admin:${password_couchdb_admin}" | jq -r ._rev )
  curl -s -X DELETE "http://127.0.0.1:5984/_users/org.couchdb.user%3A${app}?rev=${couchdb_user_revision}" \
    --user "admin:${password_couchdb_admin}"
}

flohmarkt_ynh_delete_couchdb_db() {
  curl -s -X DELETE "http://127.0.0.1:5984/${app}" --user "admin:${password_couchdb_admin}"
}

flohmarkt_ynh_create_couchdb_user() {
  curl -s -X PUT "http://127.0.0.1:5984/_users/org.couchdb.user:${app}" --user "admin:${password_couchdb_admin}"\
    -H "Accept: application/json" -H "Content-Type: application/json" \
    -d "{\"name\": \"${app}\", \"password\": \"${password_couchdb_flohmarkt}\", \"roles\": [], \"type\": \"user\"}"
  # @@ check answer something like
  # {"ok":true,"id":"org.couchdb.user:flohmarkt","rev":"35-9865694604ab384388eea0f978a6e728"}
}

flohmarkt_ynh_couchdb_user_permissions() {
  curl -s -X PUT "http://127.0.0.1:5984/${app}/_security" --user "admin:${password_couchdb_admin}"\
    -H "Accept: application/json" -H "Content-Type: application/json" \
    -d "{\"members\":{\"names\": [\"${app}\"],\"roles\": [\"editor\"]}}"

}

flohmarkt_ynh_exists_couchdb_user() {
  if [[ $( curl -sX GET "http://127.0.0.1:5984/_users/org.couchdb.user%3A${app}" \
    --user "admin:${password_couchdb_admin}" | jq .error ) == '"not_found"' ]]
  then
    false
  else
    true
  fi
}

flohmarkt_ynh_exists_couchdb_db() {
  if [[ $( curl -sX GET "http://127.0.0.1:5984/flohmarkt__22" --user "admin:${password_couchdb_admin}" \
    | jq .error ) == '"not_found"' ]]
  then
    false
  else
    true
  fi
  
}

# check whether old couchdb user or database exist before creating the new ones
flohmarkt_ynh_check_old_couchdb() {
  if flohmarkt_ynh_exists_couchdb_user; then
    ynh_die --ret_code=100 --message="CouchDB user '$app' exists already. Stopping install."
  elif flohmarkt_ynh_exists_couchdb_db; then
    ynh_die --ret_code=100 --message="CouchDB database '$app' exists already. Stopping install."
  fi  
}

flohmarkt_ynh_restore_couchdb() {
  flohmarkt_ynh_check_old_couchdb

  flohmarkt_ynh_import_couchdb
  flohmarkt_ynh_create_couchdb_user
  flohmarkt_ynh_couchdb_user_permissions
}

# create venv
flohmarkt_ynh_create_venv() {
  python3 -m venv --without-pip "$flohmarkt_venv_dir"
}

# install requirements.txt in venv
flohmarkt_ynh_venv_requirements() {
  (
    set +o nounset
    source "$flohmarkt_venv_dir/bin/activate"
    set -o nounset
    set -x
    $flohmarkt_venv_dir/bin/python3 -m ensurepip
    $flohmarkt_venv_dir/bin/pip3 install -r "$flohmarkt_app_dir/requirements.txt"
  )
}

# move files and directories to their new places
flohmarkt_ynh_upgrade_path_ynh5() {
  # flohmarkt and couchdb are already stopped in upgrade script

  # move app_dir into new 'app' folder
  mv "$flohmarkt_install/flohmarkt" "$flohmarkt_app_dir"

  # yunohost seems to move the venv dir automatically, but this
  # doesn't work, because the paths inside the venv are not adjusted
  # delete the old, not working venv and create a new one:
  ynh_secure_remove --file="$flohmarkt_venv_dir"
  flohmarkt_ynh_create_venv
  flohmarkt_ynh_venv_requirements
  # remove old $install_dir
  ynh_secure_remove --file="$flohmarkt_old_install"

  # move logfile directory
  mkdir -p "$flohmarkt_log_dir"

  # remove systemd.service - will be generated newly by upgrade
  # ynh_remove_systemd_config --service="$flohmarkt_old_service"
  ynh_systemd_action --action=stop --service_name="$flohmarkt_old_service"
  ynh_systemd_action --action=disable --service_name="$flohmarkt_old_service"
  ynh_secure_remove --file="/etc/systemd/system/multi-user.target.wants/flohmarkt.service"
  ynh_secure_remove --file="/etc/systemd/system/flohmarkt.service"
  # funktioniert nicht? issue?
  #ynh_systemd_action --action=daemon-reload
  # DEBUG + systemctl daemon-reload flohmarkt
  # WARNING Too many arguments.
  systemctl daemon-reload
  # unit flohmarkt is automatically appended and therefor this fails:
  #ynh_systemd_action --action=reset-failed
  systemctl reset-failed
 
  # create symlinks
  ln -s "$flohmarkt_install" "$flohmarkt_sym_install"
  ln -s "$flohmarkt_data_dir" "$flohmarkt_sym_data_dir"
}

#=================================================
# EXPERIMENTAL HELPERS
#=================================================

#=================================================
# FUTURE OFFICIAL HELPERS
#=================================================