#!/bin/bash
# CI Validate: Alembic迁移验证（并行Job 3/3）
# 需要PostgreSQL数据库
set -eu

echo "=== CI Validate: Alembic迁移验证 ==="

# --- DooD模式检测：确定宿主机访问地址 ---
detect_docker_host() {
  local test_port="${1:-5432}"

  local candidates=()

  # 1. host.docker.internal
  if python3 -c "import socket; socket.gethostbyname('host.docker.internal')" 2>/dev/null; then
    candidates+=("host.docker.internal")
  fi

  # 2. docker0 桥接网关
  candidates+=("172.17.0.1")

  # 3. 默认网关
  local gw=""
  gw=$(ip route 2>/dev/null | grep default | awk '{print $3}' | head -1)
  if [ -n "$gw" ] && [ "$gw" != "127.0.0.1" ]; then
    candidates+=("$gw")
  fi

  # 4. 宿主机同网段的.1或.254
  local my_ip=""
  my_ip=$(hostname -I 2>/dev/null | awk '{print $1}')
  if [ -n "$my_ip" ]; then
    local subnet=$(echo "$my_ip" | cut -d. -f1-3)
    candidates+=("${subnet}.1")
    candidates+=("${subnet}.254")
  fi

  # 5. 127.0.0.1 最后尝试
  candidates+=("127.0.0.1")

  for candidate in "${candidates[@]}"; do
    if python3 -c "
import socket
s = socket.socket()
s.settimeout(2)
try:
    s.connect(('$candidate', $test_port))
    s.close()
    print('ok')
except:
    pass
" 2>/dev/null | grep -q ok; then
      echo "$candidate"
      return 0
    fi
  done

  echo "127.0.0.1"
  return 1
}

# 获取宿主机IP
if [ -S /var/run/docker.sock ]; then
  DOCKER_HOST_IP=$(detect_docker_host 5433)
  if [ "$DOCKER_HOST_IP" = "127.0.0.1" ]; then
    DOCKER_HOST_IP=$(detect_docker_host 22)
  fi
  echo "检测到DooD模式，宿主机地址: $DOCKER_HOST_IP"
else
  DOCKER_HOST_IP="127.0.0.1"
  echo "非DooD模式，使用 127.0.0.1"
fi
PG_HOST="$DOCKER_HOST_IP"
echo "PG host: $PG_HOST"

# 指数退避TCP连接检查
wait_tcp_ready() {
  local host="$1"
  local port="$2"
  local max_attempts="${3:-5}"
  local delay=1
  local attempt=1
  while [ "$attempt" -le "$max_attempts" ]; do
    if python3 -c "import socket; s=socket.socket(); s.settimeout(3); s.connect(('$host', $port)); s.close()" 2>/dev/null; then
      return 0
    fi
    echo "TCP连接尝试 $attempt/$max_attempts 失败，${delay}s后重试..."
    sleep "$delay"
    delay=$((delay * 2))
    attempt=$((attempt + 1))
  done
  return 1
}

USE_SHARED_PG="${CI_USE_SHARED_PG:-false}"

if [ "$USE_SHARED_PG" = "true" ]; then
  # 使用常驻共享PG实例
  echo "使用常驻共享PG实例（CI_USE_SHARED_PG=true）"
  SHARED_PG_HOST="$PG_HOST"
  SHARED_PG_PORT="5433"
  SHARED_PG_USER="postgres"
  SHARED_PG_PASSWORD="ci_pg_2026!"
  CI_DB_NAME="ci_run_${GITHUB_RUN_ID:-$$}"

  echo "等待共享PG连接就绪..."
  wait_tcp_ready "$SHARED_PG_HOST" "$SHARED_PG_PORT" 5

  echo "创建测试数据库: $CI_DB_NAME"
  PGPASSWORD="$SHARED_PG_PASSWORD" python3 -c "
import psycopg2
conn = psycopg2.connect(host='$SHARED_PG_HOST', port=$SHARED_PG_PORT, user='$SHARED_PG_USER', password='$SHARED_PG_PASSWORD', dbname='postgres')
conn.autocommit = True
cur = conn.cursor()
cur.execute(f'CREATE DATABASE \"$CI_DB_NAME\"')
cur.close()
conn.close()
"
  export DATABASE_URL="postgresql+psycopg://${SHARED_PG_USER}:${SHARED_PG_PASSWORD}@${SHARED_PG_HOST}:${SHARED_PG_PORT}/${CI_DB_NAME}"
  echo "✅ 共享PG数据库已创建: $CI_DB_NAME"

  # 执行迁移
  PYTHONPATH="$PWD/apps/api:$PWD" python3 -m alembic upgrade head
  echo "✅ Alembic migrations applied successfully"

  # 清理数据库
  echo "清理测试数据库: $CI_DB_NAME"
  PGPASSWORD="$SHARED_PG_PASSWORD" python3 -c "
import psycopg2
conn = psycopg2.connect(host='$SHARED_PG_HOST', port=$SHARED_PG_PORT, user='$SHARED_PG_USER', password='$SHARED_PG_PASSWORD', dbname='postgres')
conn.autocommit = True
cur = conn.cursor()
cur.execute(f'DROP DATABASE IF EXISTS \"$CI_DB_NAME\" WITH (FORCE)')
cur.close()
conn.close()
" 2>/dev/null || echo "WARN: 数据库清理失败"
  echo "✅ 共享PG数据库已清理"
else
  # 使用临时PG容器（默认模式）
  echo "使用临时PG容器模式"
  PG_CONTAINER=ci-pg-validate-migration-${GITHUB_RUN_ID:-$$}
  docker rm -f "$PG_CONTAINER" 2>/dev/null || true
  docker run -d --name "$PG_CONTAINER" \
    --shm-size=256m \
    -e POSTGRES_USER=postgres \
    -e POSTGRES_PASSWORD=postgres \
    -e POSTGRES_DB=xiaoxia_saas \
    -P \
    --health-cmd "pg_isready -U postgres" \
    --health-interval 3s \
    --health-timeout 3s \
    --health-retries 20 \
    postgres:16-alpine
  PG_PORT=$(docker port "$PG_CONTAINER" 5432/tcp | cut -d: -f2)
  echo "PostgreSQL port: $PG_PORT"
  export DATABASE_URL="postgresql+psycopg://postgres:postgres@${PG_HOST}:${PG_PORT}/xiaoxia_saas"

  # 等待容器健康
  for i in $(seq 1 30); do
    if docker inspect --format='{{.State.Health.Status}}' "$PG_CONTAINER" 2>/dev/null | grep -q healthy; then
      echo "PostgreSQL container is healthy on port $PG_PORT"
      break
    fi
    echo "Waiting for PostgreSQL container health... ($i/30)"
    sleep 2
  done
  docker inspect --format='{{.State.Health.Status}}' "$PG_CONTAINER" | grep -q healthy

  # TCP连通性检查
  echo "验证TCP连通性 ($PG_HOST:$PG_PORT)..."
  wait_tcp_ready "$PG_HOST" "$PG_PORT" 5
  echo "TCP connectivity to PostgreSQL confirmed on port $PG_PORT"

  # 执行迁移
  PYTHONPATH="$PWD/apps/api:$PWD" python3 -m alembic upgrade head
  echo "✅ Alembic migrations applied successfully"

  docker rm -f "$PG_CONTAINER" 2>/dev/null || true
fi

echo ""
echo "=== CI Validate: Alembic迁移验证 通过 ✅ ==="