package main

import (
	"embed"
	"flag"
	"fmt"
	"io/fs"
	"net/http"
	"os/exec"
	"path"
	"runtime"
	"strings"
	"time"

	"bj_power_wms/internal/config"
	"bj_power_wms/internal/handler"
	"bj_power_wms/internal/logdaily"
	"bj_power_wms/internal/svc"

	"github.com/zeromicro/go-zero/core/conf"
	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/rest"
)

// 前端静态资源（Vue 构建产物，由 frontend/ npm run build 输出到 web/static）。
// 原由 bj_power_wms_client(8891) 托管并反代 API，2026-09-07 合并进主服务：
// 一个 exe、一个端口(8890)同时提供页面与 API。
//
//go:embed all:web/static
var webFS embed.FS

var configFile = flag.String("f", "etc/bj_power_wms-api.yaml", "the config file")

// newStaticHandler 嵌入式静态文件：命中则直接返回；未命中的非 /api 路径
// 回退到 index.html（SPA history 路由），由浏览器端 Vue Router 接管。
func newStaticHandler(fsys embed.FS) http.Handler {
	sub, err := fs.Sub(fsys, "web/static")
	if err != nil {
		panic(fmt.Sprintf("嵌入静态目录不可用: %v", err))
	}
	fileServer := http.FileServer(http.FS(sub))
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		name := strings.TrimPrefix(path.Clean(r.URL.Path), "/")
		if name == "" {
			name = "index.html"
		}
		if f, openErr := sub.Open(name); openErr == nil {
			f.Close()
			fileServer.ServeHTTP(w, r)
			return
		}
		r2 := r.Clone(r.Context())
		r2.URL.Path = "/"
		fileServer.ServeHTTP(w, r2)
	})
}

// openBrowser 调用系统默认浏览器打开 url（仅本机开发使用，服务器部署时 Web.OpenBrowser=false）
func openBrowser(url string) {
	var cmd *exec.Cmd
	switch runtime.GOOS {
	case "windows":
		cmd = exec.Command("rundll32", "url.dll,FileProtocolHandler", url)
	case "darwin":
		cmd = exec.Command("open", url)
	default:
		cmd = exec.Command("xdg-open", url)
	}
	_ = cmd.Start()
}

func main() {
	flag.Parse()

	var c config.Config
	conf.MustLoad(*configFile, &c)

	// 日志按天存储：logs/bj_power_wms-2026-01-02.log，保留 30 天
	if c.Log.Mode == "file" {
		logx.SetUp(c.Log)
		w := logdaily.New(c.Log.Path, c.Name, 30)
		defer w.Close()
		logx.SetWriter(logx.NewWriter(w))
	}

	staticHandler := newStaticHandler(webFS)

	// 兜底路由：已注册的 /api/* 走正常匹配；未注册的非 /api 路径走嵌入式静态资源
	//（/api 下未注册的路径仍返回 404，不回退页面）
	notFound := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if strings.HasPrefix(r.URL.Path, "/api/") || r.URL.Path == "/api" {
			http.NotFound(w, r)
			return
		}
		staticHandler.ServeHTTP(w, r)
	})

	server := rest.MustNewServer(c.RestConf, rest.WithNotFoundHandler(notFound))
	defer server.Stop()

	ctx := svc.NewServiceContext(c)

	handler.RegisterHandlers(server, ctx)

	fmt.Printf("Starting bj_power_wms server at %s:%d...\n", c.Host, c.Port)
	logx.Infof("Starting bj_power_wms server at %s:%d...", c.Host, c.Port)

	// 服务起来后自动打开浏览器访问前端（本机开发便利；Web.OpenBrowser=false 关闭）
	if c.Web.OpenBrowser {
		go func() {
			time.Sleep(time.Second)
			host := c.Host
			if host == "0.0.0.0" || host == "" {
				host = "127.0.0.1"
			}
			openBrowser(fmt.Sprintf("http://%s:%d", host, c.Port))
		}()
	}

	server.Start()
}