#!/bin/bash
# deploy.sh — Deploy main branch to production (vhtv-stiftung.de)
#
# Usage:
#   ./deploy.sh              # Deploy current main to production
#   ./deploy.sh --dry-run    # Show what would happen without deploying
#
# Prerequisites:
#   - SSH access to the production server (key-based auth)
#   - Production .env file at /opt/stiftung/.env on the server
#   - Git remote 'origin' configured on the server pointing to Gitea

set -euo pipefail

SERVER="${DEPLOY_SERVER:-remmer@vhtv-stiftung.de}"
PROD_DIR="${DEPLOY_DIR:-/opt/stiftung}"
COMPOSE_FILE="compose.yml"
DRY_RUN=false

if [[ "${1:-}" == "--dry-run" ]]; then
    DRY_RUN=true
    echo "=== DRY RUN — no changes will be made ==="
fi

echo "=== Stiftung Production Deployment ==="
echo "Server:  $SERVER"
echo "Path:    $PROD_DIR"
echo "Compose: $COMPOSE_FILE"
echo ""

# Verify local main is up to date with remote
LOCAL_MAIN=$(git rev-parse main 2>/dev/null || echo "unknown")
echo "Local main: $LOCAL_MAIN"

if [[ "$DRY_RUN" == true ]]; then
    echo ""
    echo "Would SSH to $SERVER and:"
    echo "  1. git fetch origin main && git reset --hard origin/main"
    echo "  2. docker compose down"
    echo "  3. docker compose up -d --build"
    echo "  4. Run migrations and collectstatic"
    echo ""
    echo "=== Dry run complete ==="
    exit 0
fi

echo ""
read -p "Deploy main ($LOCAL_MAIN) to production? [y/N] " -n 1 -r
echo ""
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    echo "Aborted."
    exit 0
fi

echo ""
echo "=== Deploying to $SERVER:$PROD_DIR ==="

ssh "$SERVER" bash -s "$PROD_DIR" "$COMPOSE_FILE" << 'DEPLOY_SCRIPT'
set -euo pipefail
PROD_DIR="$1"
COMPOSE_FILE="$2"
cd "$PROD_DIR"

echo "--- Fetching latest main ---"
git fetch origin main
git checkout main
git reset --hard origin/main

echo ""
echo "--- Pulling standard images ---"
docker compose -f "$COMPOSE_FILE" pull db redis grampsweb || echo "Some pulls failed, using cached"

echo ""
echo "--- Stopping containers ---"
docker compose -f "$COMPOSE_FILE" down

echo ""
echo "--- Building and starting ---"
docker compose -f "$COMPOSE_FILE" up -d --build

echo ""
echo "--- Waiting for services to start ---"
sleep 20

echo ""
echo "--- Running migrations ---"
docker compose -f "$COMPOSE_FILE" exec -T web python manage.py migrate

echo ""
echo "--- Collecting static files ---"
docker compose -f "$COMPOSE_FILE" exec -T web python manage.py collectstatic --noinput

echo ""
echo "--- Service status ---"
docker compose -f "$COMPOSE_FILE" ps

echo ""
echo "=== Deployment complete ==="
DEPLOY_SCRIPT

echo ""
echo "=== Done! Production updated to main ($LOCAL_MAIN) ==="
echo "Site: https://vhtv-stiftung.de"