#!/bin/bash
set -euo pipefail

# ===========================================
# Re:Link Auto Deploy Script
# Triggered by Gitea webhook on push to main
# ===========================================

APP_DIR="$HOME/relink"
LOG_FILE="$APP_DIR/deploy.log"
LOCK_FILE="$APP_DIR/deploy.lock"
GITEA_REPO="http://39.117.244.52:3000/geonhee/Re_Link.git"

log() {
    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a "$LOG_FILE"
}

# Prevent concurrent deploys
if [ -f "$LOCK_FILE" ]; then
    LOCK_PID=$(cat "$LOCK_FILE" 2>/dev/null)
    if kill -0 "$LOCK_PID" 2>/dev/null; then
        log "ERROR: Deploy already running (PID: $LOCK_PID). Skipping."
        exit 1
    fi
    rm -f "$LOCK_FILE"
fi
echo $$ > "$LOCK_FILE"
trap 'rm -f "$LOCK_FILE"' EXIT

log "=== Deploy started ==="

# Navigate to app directory
cd "$APP_DIR"

# Clone or pull
if [ ! -d "$APP_DIR/repo/.git" ]; then
    log "Cloning repository..."
    git clone "$GITEA_REPO" "$APP_DIR/repo"
    cd "$APP_DIR/repo"
else
    cd "$APP_DIR/repo"
    log "Pulling latest changes..."
    git fetch origin
    git reset --hard origin/main
fi

log "Current commit: $(git log --oneline -1)"

# Copy env file
if [ -f "$APP_DIR/.env.production" ]; then
    cp "$APP_DIR/.env.production" "$APP_DIR/repo/.env.production"
fi

# Build and deploy
log "Building and deploying with Docker Compose..."
docker compose -f docker-compose.prod.yml --env-file .env.production up -d --build --remove-orphans 2>&1 | tee -a "$LOG_FILE"

# Wait for services
log "Waiting for services to be healthy..."
sleep 15

# Health check
if curl -sf http://localhost/health > /dev/null 2>&1; then
    log "Health check PASSED"
else
    log "WARNING: Health check failed - services may still be starting"
fi

# Cleanup old images
docker image prune -f >> "$LOG_FILE" 2>&1

log "=== Deploy completed ==="