#!/bin/zsh

###############################################
# CONFIG
###############################################

RIO="/opt/local/Library/Frameworks/Python.framework/Versions/3.11/bin/rio"
MANIFEST="manifest_dem.txt"

OUT_ROOT="terrain_rgb"
LOG_DIR="logs/dem"
RESUME_FILE="resume/dem_resume.txt"

mkdir -p "$OUT_ROOT" "$LOG_DIR" "resume"


###############################################
# CHECK BINARI
###############################################

check_bin() {
    if ! command -v "$1" >/dev/null 2>&1; then
        echo "[ERRORE] Binario non trovato: $1"
        exit 1
    fi
}

check_bin gdalinfo
check_bin gdal_translate

if [ ! -x "$RIO" ]; then
    echo "[ERRORE] rio non trovato: $RIO"
    exit 1
fi


###############################################
# RESUME
###############################################

LAST_DONE=0
if [ -f "$RESUME_FILE" ]; then
    LAST_DONE=$(cat "$RESUME_FILE")
fi

DEM_COUNT=0


###############################################
# LOOP DEM
###############################################

while IFS= read -r DEM; do

    DEM=$(echo "$DEM" | tr -d '\r' | xargs)
    [ -z "$DEM" ] && continue

    if [ ! -f "$DEM" ]; then
        echo "[WARN] DEM non trovato: $DEM"
        continue
    fi

    DEM_COUNT=$((DEM_COUNT + 1))

    if [ "$DEM_COUNT" -le "$LAST_DONE" ]; then
        echo "[SKIP] DEM #$DEM_COUNT già processato"
        continue
    fi

    BASENAME=$(basename "$DEM" .tif)
    WORKDIR="$OUT_ROOT/$BASENAME"
    mkdir -p "$WORKDIR"

    LOGFILE="$LOG_DIR/${BASENAME}.log"

    echo "[INFO] DEM #$DEM_COUNT → $DEM"
    echo "[INFO] Log: $LOGFILE"

    OUT_TERRAIN="$WORKDIR/${BASENAME}_terrain_rgb.tif"

    {
        echo "----------------------------------------"
        echo "DEM: $DEM"
        echo "Output: $OUT_TERRAIN"
        echo "Start: $(date)"
        echo "----------------------------------------"

        "$RIO" rgbify \
            --min-z 0 \
            --max-z 9000 \
            --format png \
            "$DEM" \
            "$OUT_TERRAIN"

        STATUS=$?

        echo "End: $(date)"
        echo "Status: $STATUS"
        echo "----------------------------------------"

    } >> "$LOGFILE" 2>&1

    if [ "$STATUS" -ne 0 ]; then
        echo "[ERRORE] rgbify fallito per $DEM"
        continue
    fi

    echo "$DEM_COUNT" > "$RESUME_FILE"
    echo "[OK] Terrain‑RGB generato per $BASENAME"

done < "$MANIFEST"

echo "[INFO] Fase 1 completata"