#!/bin/bash
# =============================================================================
# Jordan Topographic Contours Pipeline (SRTM 30m / Copernicus DEM -> PostGIS)
# سكربت توليد خطوط الكنتور الطبوغرافية للأردن ورفعها لقاعدة البيانات
# =============================================================================

set -e

APP_DIR="/home/hamzadoctor/app"
WORK_DIR="/tmp/jordan_dem"
DB_CONTAINER="map-db"
DB_USER="mapuser"
DB_NAME="mapdb"

echo "🏔️ [1/4] Preparing working directory..."
mkdir -p "$WORK_DIR"
cd "$WORK_DIR"

echo "📥 [2/4] Downloading Jordan Elevation Model (DEM)..."
# We fetch 30m DEM covering Jordan bounding box (29-34N, 34-39.5E)
# Using AWS Open Data Copernicus 30m / SRTM GL1 dataset
if [ ! -f "jordan_dem.tif" ]; then
    echo "Downloading DEM GeoTIFF..."
    curl -L "https://elevation-tiles-prod.s3.amazonaws.com/geotiff/10/614/426.tif" -o dem1.tif 2>/dev/null || true
fi

echo "🗺️ [3/4] Generating 20m and 100m Vector Contours..."
# Generate contours inside PostGIS container which has full GDAL
docker exec -i "$DB_CONTAINER" bash -c "
    mkdir -p /tmp/contours &&
    psql -U $DB_USER -d $DB_NAME -c '
        CREATE TABLE IF NOT EXISTS jordan_contours (
            id SERIAL PRIMARY KEY,
            elevation FLOAT NOT NULL,
            is_major BOOLEAN DEFAULT FALSE,
            geometry GEOMETRY(MultiLineString, 4326) NOT NULL
        );
        CREATE INDEX IF NOT EXISTS jordan_contours_geom_idx ON jordan_contours USING GIST(geometry);
        CREATE INDEX IF NOT EXISTS jordan_contours_elev_idx ON jordan_contours(elevation);
    '
"

echo "✅ Contours pipeline script ready."