#!/usr/bin/env bash
set -euo pipefail

# Extract two comparable map images (z14 and z16) with the same center point.
# Uses tileserver-gl static endpoint to avoid local math dependencies.

LAT="${1:-49.8917}"
LON="${2:-10.8917}"
STYLE="${3:-europa-detail}"
OUT_DIR="${4:-docs/exports}"
BASE_URL="${5:-http://127.0.0.1:9983/styles}"
SIZE="${6:-256x256}"

mkdir -p "$OUT_DIR"

Z14_FILE="$OUT_DIR/bamberg_innenstadt_z14.png"
Z16_FILE="$OUT_DIR/bamberg_innenstadt_z16.png"
META_FILE="$OUT_DIR/bamberg_tile_compare.txt"

Z14_URL="$BASE_URL/$STYLE/static/$LON,$LAT,14/$SIZE.png"
Z16_URL="$BASE_URL/$STYLE/static/$LON,$LAT,16/$SIZE.png"

curl -fsS "$Z14_URL" -o "$Z14_FILE"
curl -fsS "$Z16_URL" -o "$Z16_FILE"

cat > "$META_FILE" <<EOF
center_lat=$LAT
center_lon=$LON
style=$STYLE
size=$SIZE
z14=static
z16=static
z14_url=$Z14_URL
z16_url=$Z16_URL
EOF

echo "Created: $Z14_FILE"
echo "Created: $Z16_FILE"
echo "Metadata: $META_FILE"