package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"log"
	"net/http"

	"ghproxy/auth"
	"ghproxy/config"
	"ghproxy/logger"
	"ghproxy/proxy"

	"github.com/gin-gonic/gin"
)

var (
	cfg        *config.Config
	logw       = logger.Logw
	router     *gin.Engine
	configfile = "/data/ghproxy/config/config.toml"
)

func ReadFlag() {
	cfgfile := flag.String("cfg", configfile, "config file path")
	configfile = *cfgfile
}

func loadConfig() {
	var err error
	// 初始化配置
	cfg, err = config.LoadConfig(configfile)
	if err != nil {
		log.Fatalf("Failed to load config: %v", err)
	}
	fmt.Printf("Loaded config: %v\n", cfg)
}

func setupLogger(cfg *config.Config) {
	// 初始化日志模块
	var err error
	err = logger.Init(cfg.Log.LogFilePath, cfg.Log.MaxLogSize) // 传递日志文件路径
	if err != nil {
		log.Fatalf("Failed to initialize logger: %v", err)
	}
	logw("Logger initialized")
	logw("Init Completed")
}

func Loadlist(cfg *config.Config) {
	auth.LoadBlacklist(cfg)
	auth.LoadWhitelist(cfg)
}

func init() {
	ReadFlag()
	loadConfig()
	setupLogger(cfg)
	Loadlist(cfg)

	// 设置 Gin 模式
	gin.SetMode(gin.ReleaseMode)

	// 初始化路由
	router = gin.Default()

	// 定义路由
	router.GET("/", func(c *gin.Context) {
		c.Redirect(http.StatusMovedPermanently, "https://ghproxy0rtt.1888866.xyz/")
	})

	router.GET("/api", api)

	// 健康检查
	router.GET("/api/healthcheck", func(c *gin.Context) {
		c.String(http.StatusOK, "OK")
	})

	// 未匹配路由处理
	router.NoRoute(func(c *gin.Context) {
		proxy.NoRouteHandler(cfg)(c)
	})
}

func main() {
	// 启动服务器
	err := router.Run(fmt.Sprintf("%s:%d", cfg.Server.Host, cfg.Server.Port))
	if err != nil {
		log.Fatalf("Error starting server: %v\n", err)
	}

	fmt.Println("Program finished")
}

func api(c *gin.Context) {
	// 设置响应头
	c.Writer.Header().Set("Content-Type", "application/json")
	json.NewEncoder(c.Writer).Encode(map[string]interface{}{
		"MaxResponseBodySize": cfg.Server.SizeLimit,
	})
}