#!/bin/bash

BASE_DIR="/files"
CURRENT_DIR="$BASE_DIR/current"

mkdir -p "$CURRENT_DIR"

# Store last SHA256 checksums for each camera
declare -A LAST_SHA

echo "[Watcher] Starting to monitor subfolders in $BASE_DIR ..."

while true; do
    for CAM_DIR in "$BASE_DIR"/msvcam*; do
        [ -d "$CAM_DIR" ] || continue

        CAM_NAME=$(basename "$CAM_DIR")
        OUT_FILE="$CURRENT_DIR/${CAM_NAME}.avif"

        # Find the newest image
        NEWEST_FILE=$(find "$CAM_DIR" -type f -iregex ".*\.\(jpg\|jpeg\|png\|bmp\|tif\|tiff\)" -printf "%T@ %p\n" | sort -n | tail -1 | awk '{print $2}')

        if [ -n "$NEWEST_FILE" ]; then
            # Calculate SHA256 of the newest image
            SHA=$(sha256sum "$NEWEST_FILE" | awk '{print $1}')

            # Check if this file has already been converted
            if [ "${LAST_SHA[$CAM_NAME]}" != "$SHA" ]; then
                echo "[Watcher] New or changed file detected for $CAM_NAME: $NEWEST_FILE"
                avifenc "$NEWEST_FILE" "$OUT_FILE"
		sync
                LAST_SHA[$CAM_NAME]="$SHA"
            else
                echo "[Watcher] No change detected for $CAM_NAME, skipping conversion."
            fi
        fi
    done
    sleep 5
done