#!/bin/bash
# 服务启动脚本
# 支持多租户模式：同一服务可部署多个实例（数据库连接不同）

# 获取脚本所在目录
SCRIPT_DIR=$(dirname "$(readlink -f "$0")")
APP_HOME=$(dirname "$SCRIPT_DIR")

# 加载函数：读取properties文件
load_properties() {
    local file="$1"
    if [ -f "$file" ]; then
        while IFS='=' read -r key value; do
            [[ "$key" =~ ^#.*$ ]] && continue
            [[ -z "$key" ]] && continue
            key=$(echo "$key" | xargs)
            value=$(echo "$value" | xargs)
            # 跳过空值
            [[ -z "$value" ]] && continue
            export "$key=$value"
        done < "$file"
    fi
}

# 1. 加载统一环境配置
load_properties "${APP_HOME}/conf/env.properties"

# 2. 加载服务个性化配置（覆盖统一配置）
load_properties "${APP_HOME}/conf/service.properties"

# 3. 设置默认值
APP_NAME=${APP_NAME:-"unknown"}
# INSTANCE_NAME: 如果为空或为字面值${APP_NAME}，则使用APP_NAME
if [[ -z "${INSTANCE_NAME}" ]] || [[ "${INSTANCE_NAME}" == '\${APP_NAME}' ]]; then
    INSTANCE_NAME=${APP_NAME}
fi
TENANT_ID=${TENANT_ID:-""}

# 4. 主类（从service.properties读取，必须配置）
MAIN_CLASS=${MAIN_CLASS:-""}
if [ -z "$MAIN_CLASS" ]; then
    echo "Error: MAIN_CLASS not configured in service.properties"
    exit 1
fi

# 5. ClassPath（lib目录所有jar + conf目录）
if [ ! -d "${APP_HOME}/lib" ]; then
    echo "Error: lib directory not found: ${APP_HOME}/lib"
    exit 1
fi
CLASSPATH="${APP_HOME}/lib/*:${APP_HOME}/conf"

# 6. 日志目录（使用INSTANCE_NAME区分不同实例）
LOG_HOME="/datacfs/applogs/${INSTANCE_NAME}"

# 7. PID文件路径
PID_FILE="${APP_HOME}/${INSTANCE_NAME}.pid"

# JVM参数（可通过环境变量覆盖）
JAVA_OPTS="${JAVA_OPTS:--Xms256m -Xmx512m -XX:+UseG1GC -XX:MaxGCPauseMillis=200}"

# 日志目录参数（其他日志配置在application.yml/logback-spring.xml中）
LOG_OPTS="-Dlogging.file.path=${LOG_HOME}"

# 多租户参数
TENANT_OPTS=""
if [ -n "${TENANT_ID}" ]; then
    TENANT_OPTS="-DTENANT_ID=${TENANT_ID}"
fi

# 检查是否已运行
if [ -f "$PID_FILE" ]; then
    PID=$(cat $PID_FILE)
    if ps -p $PID > /dev/null 2>&1; then
        echo "${INSTANCE_NAME} is already running (PID: $PID)"
        exit 1
    fi
fi

# 创建日志目录
mkdir -p ${LOG_HOME}

# 启动服务
echo "Starting ${INSTANCE_NAME}..."
echo "  APP_NAME: ${APP_NAME}"
echo "  INSTANCE_NAME: ${INSTANCE_NAME}"
echo "  APP_HOME: ${APP_HOME}"
echo "  MAIN_CLASS: ${MAIN_CLASS}"
echo "  CLASSPATH: ${CLASSPATH}"
echo "  LOG_HOME: ${LOG_HOME}"
echo "  JAVA_OPTS: ${JAVA_OPTS}"
if [ -n "${TENANT_ID}" ]; then
    echo "  TENANT_ID: ${TENANT_ID}"
fi

# 启动命令：java -cp lib/*:conf MainClass
nohup java $JAVA_OPTS $LOG_OPTS $TENANT_OPTS -cp "$CLASSPATH" $MAIN_CLASS > /dev/null 2>&1 &

# 保存PID
echo $! > $PID_FILE
echo "${INSTANCE_NAME} started (PID: $(cat $PID_FILE))"