#!/bin/ash
# shellcheck shell=dash
. /recalbox/share/system/configs/savesync/savesync.conf

PIPE="/tmp/savesync_pipe"
LOG_FILE="/recalbox/share/system/logs/savesync.log"

# Setup the pipe if it doesn't exist
[ -p "$PIPE" ] || mkfifo "$PIPE"
chmod 666 "$PIPE"

write_log() {
    printf "[%s] %s\n" "$(date '+%Y-%m-%d %H:%M:%S')" "$1" >> "$LOG_FILE"
}

write_log "--- Daemon Started ---"

while true; do
    # Read one line from the pipe
    if read -r line < "$PIPE"; then
        case "$line" in
            LOG:*)
                write_log "${line#LOG:}"
                ;;
            EVENT:*)
                # Fork the event handling
                (
                    event_data="${line#EVENT:}"
                    
                    # Process the multi-line event data
                    # We use echo and a pipe to feed the while loop
                    echo "$event_data" | tr -d '\r' | while IFS="=" read -r key val; do
                        case "$key" in
                            "SystemId") sid="$val" ;;
                            "GamePath")
                                gp="$val"
                                sp=$(echo "$val" | sed 's|roms|saves|; s|\.[^.]*$|.srm|')
                                bp=$(echo "$sp" | sed 's|saves|archives|')
                                ;;
                            "Action") act="$val" ;;
                            "State")
                                st="$val"

                                if [ "$st" = "playing" ] && [ "$act" = "rungame" ]; then
                                    write_log "Sync START: $(basename "$gp")"
                                    
                                    remote_f="$REMOTE_BASE/$sid/$(basename "$sp")"
                                    loc_sz=$(stat -c %s "$sp" 2>/dev/null || echo 0)
                                    rem_sz=$(rclone lsjson "$remote_f" 2>/dev/null | grep -o '"Size":[0-9]*' | cut -d: -f2)
                                    : "${rem_sz:=0}"

                                    if [ "$loc_sz" -lt "$rem_sz" ]; then
                                        write_log "Cloud save larger ($rem_sz). Restoring..."
                                        mkdir -p "$(dirname "$bp")"
                                        rclone copyto "$remote_f" "$sp" --backup-dir "$(dirname "$bp")"
                                    else
                                        write_log "Local save current. Updating..."
                                        rclone update "$remote_f" "$sp"
                                    fi
                                    
                                    # Signal back to the publisher via MQTT or a second Response Pipe
                                    #mosquitto_pub -t "$RESPONSE_TOPIC" -m "SaveSync=0" 2>/dev/null

                                elif [ "$st" = "endgame" ]; then
                                    write_log "Sync END: $(basename "$sp")"
                                    rclone update "$sp" "$REMOTE_BASE/$sid/"
                                    write_log "Final Sync Done."
                                    #mosquitto_pub -t "$RESPONSE_TOPIC" -m "SaveSync=0" 2>/dev/null
                                fi
                                ;;
                        esac
                    done
                ) &
                ;;
        esac
    fi
done