#!/bin/sh
CONFIG_FILE="$(dirname "$0")/config.sh"
[ ! -e "$CONFIG_FILE" ] && {
	echo "please create $CONFIG_FILE"
	exit 1
}

VDIRSYNCER_PREFIX="$XDG_DATA_HOME/vdirsyncer"
VDIRSYNCER_STATUS_PATH="$VDIRSYNCER_PREFIX/status"

# generate a valid storage/pair name from an invalid one
safeify() { echo "$1" | sha1sum | cut -c1-40 ; }
# safeify() { echo "$1" | tr -c '0-9A-Za-z' '_' | sed 's/_\+/_/g' ; }

[ -z "$EXPORT_LIB" ] && cat << EOF
# THIS FILE IS AUTO-GENERATED AND SHOULD NOT BE SAVED TO DISK!!! Use with
# vdirsyncer by piping the output of this script to a named pipe.

[general]
status_path = "$VDIRSYNCER_STATUS_PATH"

EOF

[ -n "$EXPORT_LIB" ] && _cfg_dav() { true ; }
[ -z "$EXPORT_LIB" ] && _cfg_dav() {
	cat << EOF
[pair $ID]
a = "${ID}_local"
b = "${ID}_remote"
collections = ["from a", "from b"]
metadata = ["displayname", "color"]

[storage ${ID}_local]
type = "filesystem"
path = "$VDIRSYNCER_PREFIX/$ID/"
fileext = "$FILEEXT"

[storage ${ID}_remote]
type = "$DAV_TYPE"
url = "$BASE_URL"
EOF
	[ -n "$USERNAME" ] && echo "username = \"$USERNAME\""
	[ -n "$PASSWORD" ] && echo "password = \"$PASSWORD\""

	echo # trailing blank line
}

[ -n "$EXPORT_LIB" ] && _cfg_ical() { true ; }
[ -z "$EXPORT_LIB" ] && _cfg_ical() {
	cat << EOF
[pair $ID]
a = "${ID}_remote"
b = "${ID}_local"
collections = null

[storage ${ID}_local]
type = "filesystem"
path = "$VDIRSYNCER_PREFIX/$ID/"
fileext = ".ics"

[storage ${ID}_remote]
type = "http"
url = "${URL}"
EOF

	[ -n "$USERNAME" ] && echo "username = \"$USERNAME\""
	[ -n "$PASSWORD" ] && echo "password = \"$PASSWORD\""

	echo # trailing blank line
}

ical() {
	URL="$1"
	USERNAME="$2" # optional
	PASSWORD="$3" # optional

	NAME="${NAME-"$(basename "$URL")"}"
	ID="$(safeify "$NAME")"

	_cfg_ical
}

caldav() { DAV_TYPE="caldav" dav "$@" ; }
carddav() { DAV_TYPE="carddav" dav "$@" ; }
dav() {
	BASE_URL="$1"
	USERNAME="$2" # optional
	PASSWORD="$3" # optional

	ID="$(safeify "$(echo "$BASE_URL$DAV_TYPE" | sed -e 's#^https\?://##' -e 's#/.*##')")"

	[ "$DAV_TYPE" = "caldav" ] && FILEEXT=".ics"
	[ "$DAV_TYPE" = "carddav" ] && FILEEXT=".vcf"

	# only generate specific DAV config if explicitly defined
	if [ -n "$DAV_TYPE" ] ; then
		_cfg_dav
		return
	fi

	# else generate both
	caldav "$@"
	carddav "$@"
}

# load "actual" config file
[ -z "$EXPORT_LIB" ] && . "$CONFIG_FILE"

# make inspecting output easier
[ -z "$EXPORT_LIB" ] && printf '# %s:%s=%s\n' vim ft dosini