#!/usr/bin/env sh

# - Syncs mail for all accounts, or a single account given as an argument.
# - Displays a notification showing the number of new mails.
# - Displays a notification for each new mail with its subject displayed.
# - Runs notmuch to index new mail.

MAILDIR="${MAILDIR:-${XDG_DATA_HOME:-$HOME/.local/share}/mail}"
MBSYNCRC="${MBSYNCRC:-${XDG_CONFIG_HOME:-$HOME/.config}/isyncrc}"
MS_last_run="${XDG_STATE_HOME:-$HOME/.local/state}/.mailsynclastrun"

# Run only if not already running in other instance
pgrep mbsync >/dev/null && { echo "mbsync is already running." >&2; exit ;}

# Check account for new mail. Notify if there is new content.
syncandnotify() {
    acc="$(printf %s "$account" | sed "s/.*\///")"
    if [ -z "$opts" ]; then mbsync -c "$MBSYNCRC" "$acc"; else mbsync -c "$MBSYNCRC" "$opts" "$acc"; fi
    newcount=$(find "$MAILDIR/$acc/"[Ii][Nn][Bb][Oo][Xx]/new/ -type f -newer "$MS_last_run" 2> /dev/null | sed '/^\s*$/d' | wc -l)
    notify-send --app-name="mailsync" "Mailsync" "📬 $newcount new mail(s) in \`$acc\` account."
}

# Sync accounts passed as argument or all.
if [ "$#" -eq "0" ]; then
    accounts="$(awk '/^Channel/ {print $2}' "$MBSYNCRC")"
else
    for arg in "$@"; do
        [ "${arg%${arg#?}}" = '-' ] && opts="${opts:+${opts} }${arg}" && shift 1
    done
    accounts=$*
fi

# Parallelize multiple accounts
for account in $accounts; do
    syncandnotify &
done

wait

notmuch new 2>/dev/null

#Create a touch file that indicates the time of the last run of mailsync
touch "$MS_last_run"
# Update the corresponding block in the statusbar.
pkill -RTMIN+12 "${STATUSBAR:-dwmblocks}"