#!/bin/bash

[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"

if [[ -e /b/errhandle/err ]]; then
  source /b/errhandle/err
else
  set -eE -o pipefail
  trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
fi

source /a/bin/bash_unpublished/source-state
source /a/bin/distro-functions/src/package-manager-abstractions
# davdroid setup instructions at the bottom

# main docs:
# http://radicale.org/user_documentation/
# https://davdroid.bitfire.at/configuration/

# note on debugging: if radicale can't bind to the address,
# in the log it just says "Starting Radicale". If you run
# it in the foreground, it will give more info. Background
# plus debug does not help.
# sudo -u radicale radicale -D -f

# created password file with:
# htpasswd -c /etc/davpass dav

vpn_ser=openvpn-client
if [[ ! -e /lib/systemd/system/openvpn-client@.service ]]; then
    vpn_ser=openvpn
fi

d=/etc/systemd/system/radicale.service.d
mkdir -p $d
cat >$d/override.conf <<EOF
[Unit]
# this unit is configured to start and stop whenever openvpn-client@mail.service
# does
After=network.target
BindsTo=$vpn_ser@mail.service
After=$vpn_ser@mail.service

[Install]
RequiredBy=$vpn_ser@mail.service
EOF
systemctl daemon-reload # not sure this is needed

pi-nostart radicale

# use persistent uid/gid
IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
if [[ $uid != 609 ]]; then
    systemctl stop radicale ||:
    usermod -u 609 radicale
    groupmod -g 609 radicale
    usermod -g 609 radicale
fi
log_p=/var/log/radicale
[[ -d $log_p ]] || log_p=
find /o/radicale  -xdev -exec chown -h 609 {} +
find /o/radicale -xdev -exec chgrp -h 609 {} +


# I moved /var/lib/radicale after it's initialization.
# I did a sudo -u radicale git init in the collections subfolder
# after it gets created, per the git docs.
/a/exe/lnf -T /o/radicale /var/lib/radicale

# from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/

# more config is for li in distro-end

# coment in this file says this is needed for it to run on startup
sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale

setini() {
    key="$1" value="$2" section="$3"
    file="/etc/radicale/config"
    sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*$key[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
}

# comments say default is 0.0.0.0:5232
setini hosts 10.8.0.4:5232 server

if [[ $HOSTNAME == $MAIL_HOST ]]; then
    systemctl start radicale
    systemctl enable radicale
fi

# disable power management feature, set to 240 min sync interval,
# so it shouldn't be bad.

# davdroid from f-druid.
# login with url and user name
# url https://cal.iankelling.org/ian
# username ian
# pass, see password manager for radicale
#
# add account dialog:
#
# set account name as ian@iankelling.org, per help text below the
# field.
#
# switch to groups are per-contact categories,
# per https://davdroid.bitfire.at/configuration/radicale/
#
#
# After setting up account, I added one address book, named
# ianaddr. calender was already created, named ian. checked boxes under
# both. synced.
#
# To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
#
# ignorable background info:
#
# opentasks uses the calendar file.
#
# The address book I created got a uuid as a name for the file. Note
# the .props file says if it's a calendar or addressbook.
#
# When debugging, tailed /var/log/radicale/radicale.log and apache log,
# both show the requests happening. Without creating the address book,
# after creating a contact, a sync would delete it.
#
# Address books correspond to .props files in the radicale dir.
#
#  Some background is here,
# https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
# which shows separate vcard option is from rfc 6350, the other is 2426,
# radicale page says it implements the former not the latter,
# which conflicts with the documentation of which to select, but whatever.
# http://radicale.org/technical_choices/
# https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
#
# Note, url above says only cayanogenmod 13+ and omnirom can manage groups.

# Note, radicale had built-in git support to track changes, but they
# removed it in 2.0.