#!/bin/bash

#  Modules
. $(miniade) || { echo "${0##*/}: ERROR: miniade failed (hint: run 'miniade' to see error)" >&2; exit 1; }

#  Configurable stuff
DIRS=( intros songs outros silences reminders )

#  Other globals

main()
{
    local MY_ARGS PROGNAME SIMULATE

    #  Defaults for options

    #  Process options
    special_opts_handler()
    {
        case $1 in
            *)     return 1 ;;
        esac
    }
    miniade_do_option_processing --help-handler=help_handler --special-opts-handler=special_opts_handler MY_ARGS "$@" && set -- "${MY_ARGS[@]}"

    #  Process arguments
    [ $# = 2 ] || miniade_do_bad_usage
    SRC_DIR=$1
    DST_DIR=$2

    #  Sanity checks and derivations
    miniade_get_progname PROGNAME
    for DIR in "${DIRS[@]}"; do
        [ -d "$SRC_DIR/$DIR" ] || miniade_error "$SRC_DIR/$DIR: not found (hint: is $SRC_DIR really the Akoonah data directory?)"
    done
    [ -f $DST_DIR/.akoonah ] || miniade_error "$DST_DIR: doesn't look like the Akoonah micro-SD card's mountpoint"
    STAGING_DIR=$(mktemp -d)
    miniade_get_simulate SIMULATE
    if $SIMULATE; then
        RSYNC_SIMULATE_OPT=-n
    else
        RSYNC_SIMULATE_OPT=
    fi
    
    #  Guts

    miniade_info "symlinking files to staging area ..."
    #  Note that we do the symlink farm for real, regardless of if in simulate mode or not ('cos it's just temp stuff).
    DIR_COUNTER=1
    for DIR in "${DIRS[@]}"; do
        FILE_COUNTER=1
        mkdir -p "$STAGING_DIR/$(printf "%02d" $DIR_COUNTER)"
        for SYMLINK_TGT in "$SRC_DIR"/$DIR/*; do
            SYMLINK="$STAGING_DIR/$(printf "%02d" $DIR_COUNTER)/$(printf "%03d" $FILE_COUNTER).mp3"
            ln -sr "$SYMLINK_TGT" "$SYMLINK"
            #miniade_evaler "touch -h --reference=\"$SYMLINK_TGT\" \"$SYMLINK\""
            ((FILE_COUNTER++))
        done
        ((DIR_COUNTER++))
    done

    miniade_info "copying files from staging area to micro-SD card ..."
    rsync -rLtv $RSYNC_SIMULATE_OPT --omit-dir-times --modify-window=2 --no-perms --no-owner --no-group --delete --exclude='.akoonah' "$STAGING_DIR"/ "$DST_DIR"/

    echo "Contents of this micro-SD card updated by $LOGNAME on $(date) using $PROGNAME." > $DST_DIR/.akoonah

    miniade_info "flushing caches ..."
    miniade_evaler "sync"
}

help_handler()
{
    local PROGNAME

    miniade_get_progname PROGNAME
    echo "Usage: $PROGNAME [ <standard-options> ] <src-dir> <dst-dir>"
    exit 0
}

main "$@"