#!/bin/bash
# Gravl deployment script
# Prevents stale containers by always building fresh with --no-cache

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_DIR="$(dirname "$SCRIPT_DIR")"
LOG_FILE="$REPO_DIR/logs/deploy.log"
BACKEND_HEALTH="http://localhost:3001/api/health"

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

mkdir -p "$REPO_DIR/logs"
cd "$REPO_DIR"

log "=== Deploy started ==="

# Pull latest code
log "Pulling latest code..."
git pull

# Capture build metadata
GIT_COMMIT=$(git rev-parse HEAD)
BUILD_DATE=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
log "Commit: $(git rev-parse --short HEAD) | Date: $BUILD_DATE"

# Build fresh images — no-cache prevents stale assets
log "Building images (--no-cache)..."
export GIT_COMMIT BUILD_DATE
docker compose build --no-cache

# Restart containers with new images
log "Starting containers..."
docker compose up -d --force-recreate

# Health check: wait up to 60s for backend
log "Health check..."
for i in $(seq 1 12); do
  if curl -sf "$BACKEND_HEALTH" >/dev/null 2>&1; then
    log "Backend healthy"
    break
  fi
  [ "$i" -eq 12 ] && { log "ERROR: Health check failed after 60s"; exit 1; }
  log "Waiting... ($i/12)"
  sleep 5
done

log "=== Deploy complete: ${GIT_COMMIT:0:7} ==="