#!/bin/bash

# Hot-Reload Dev Script for TopFans Backend
# Usage: ./dev.sh
#
# Requires: fswatch (Mac: brew install fswatch) or inotifywait (Linux)

set -e

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
CYAN='\033[0;36m'
NC='\033[0m'

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$SCRIPT_DIR"

# Detect platform
if [[ "$(uname)" == "Darwin" ]]; then
    WATCHER_TOOL="fswatch"
    WATCHER_CMD="fswatch -r"
elif [[ "$(uname)" == "Linux" ]]; then
    WATCHER_TOOL="inotifywait"
    WATCHER_CMD="inotifywait -r -m -e modify,create,write"
else
    echo -e "${RED}不支持的平台${NC}"
    exit 1
fi

if ! command -v "$WATCHER_TOOL" &> /dev/null; then
    echo -e "${RED}缺少工具: $WATCHER_TOOL${NC}"
    if [[ "$(uname)" == "Darwin" ]]; then
        echo "安装方法: brew install fswatch"
    else
        echo "安装方法: sudo apt install inotify-tools  (Debian/Ubuntu)"
        echo "         sudo yum install inotify-tools    (CentOS/RHEL)"
    fi
    exit 1
fi

ENV_FILE="$SCRIPT_DIR/.env"
if [ -f "$ENV_FILE" ]; then
    echo -e "${GREEN}📄 加载 .env 文件...${NC}"
    set -a
    source "$ENV_FILE"
    set +a
fi

DB_HOST="${DB_HOST:-localhost}"
DB_PORT="${DB_PORT:-5432}"
DB_USER="${DB_USER:-haihuizhu}"
DB_PASSWORD="${DB_PASSWORD:-admin}"
DB_NAME="${DB_NAME:-top-fans}"
DB_ARGS=(-db-host="$DB_HOST" -db-port="$DB_PORT" -db-user="$DB_USER" -db-password="$DB_PASSWORD" -db-name="$DB_NAME")

# 启动一个服务
# 用法: start_service name binary port use_db
start_service() {
    local name=$1
    local binary=$2
    local port=$3
    local use_db=$4

    echo -e "${GREEN}🚀 启动 $name...${NC}"

    if [ "$use_db" = "1" ]; then
        "$SCRIPT_DIR/$binary" -port=$port "${DB_ARGS[@]}" > "/tmp/${name}.log" 2>&1 &
    else
        "$SCRIPT_DIR/$binary" -port=$port > "/tmp/${name}.log" 2>&1 &
    fi
    local pid=$!

    sleep 2

    if ps -p $pid > /dev/null 2>&1; then
        echo -e "${GREEN}✅ $name 已启动 (PID: $pid, 端口: $port)${NC}"
    else
        echo -e "${RED}❌ $name 启动失败${NC}"
        echo -e "${YELLOW}查看日志: tail -f /tmp/${name}.log${NC}"
    fi
}

# 构建一个服务（在服务目录下执行 go build）
# 用法: build_service name dir binary
build_service() {
    local name=$1
    local dir=$2
    local binary=$3

    if [ ! -d "$SCRIPT_DIR/$dir" ]; then
        echo -e "${RED}❌ $dir 目录不存在${NC}"
        return 1
    fi

    cd "$SCRIPT_DIR/$dir"
    if go build -o "$SCRIPT_DIR/$binary" . 2>&1; then
        echo -e "${GREEN}✅ $name 编译成功${NC}"
        return 0
    else
        echo -e "${RED}❌ $name 编译失败${NC}"
        return 1
    fi
}