#!/usr/bin/env bash

errno=$1
mbsync_args=$*

if [[ $errno -ne 0 ]]; then
    echo "mbsync failed, ignoring post-sync commands." >&2
    exit
fi

if [[ "$mbsync_args" != "gmail" ]]; then
    # only run for gmail account
    exit
fi

yt_src_mb=youtube-orig
yt_dst_mb=youtube
yt_parser=$dir/parse-mail.py
maildirs=( $(sed -nr 's/^Path\s*(.*)$/\1/p' $config) )

if [[ -z $maildirs ]]; then
    echo "Could not extract 'Path' from 'MaildirStore' in '$config'" >&2
    exit 1
fi

shopt -s extglob
shopt -s nullglob
for maildir in "${maildirs[@]}"; do
    # expand tilde
    maildir=${maildir/#~/$HOME}

    if [[ -d "$maildir/$yt_src_mb" ]]; then
        echo "No mailbox at '$maildir/$yt_src_mb'"
        continue
    fi

    for mail in "$maildir"/$yt_src_mb/new/* ; do
        mangled_mail=${mail/$yt_src_mb/$yt_dst_mb}
        # remove UID for mbsync to regenerate it
        mangled_mail="${mangled_mail/,U=+([0-9])}"

        echo -n "Parsing new message '$(basename "$mail")'..."
        $yt_parser <"$mail" >"$mangled_mail"

        if [[ $? -eq 0 ]]; then
            echo " Success."
        else
            echo " Failure! Copying message as is."
            cp "$mail" "$mangled_mail"
        fi

        # sync {a,m}time
        touch --reference "$mail" "$mangled_mail"
        mv "$mail" "${mail/new/cur}S"
    done
    # resync new yt_dst_mb
    mbsync -c "$config" gmail-$yt_src_mb gmail-$yt_dst_mb
done