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package main

import (
	"context"
	"github.com/libaxuan/cursor2api-go/config"
	"github.com/libaxuan/cursor2api-go/handlers"
	"github.com/libaxuan/cursor2api-go/middleware"
	"github.com/libaxuan/cursor2api-go/models"
	"fmt"
	"net/http"
	"os"
	"os/signal"
	"strings"
	"syscall"
	"time"

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

func main() {
	// ๅŠ ่ฝฝ้…็ฝฎ
	cfg, err := config.LoadConfig()
	if err != nil {
		logrus.Fatalf("Failed to load config: %v", err)
	}

	// ่ฎพ็ฝฎๆ—ฅๅฟ—็บงๅˆซๅ’Œ GIN ๆจกๅผ๏ผˆๅฟ…้กปๅœจๅˆ›ๅปบ่ทฏ็”ฑๅ™จไน‹ๅ‰่ฎพ็ฝฎ๏ผ‰
	if cfg.Debug {
		logrus.SetLevel(logrus.DebugLevel)
		gin.SetMode(gin.DebugMode)
	} else {
		logrus.SetLevel(logrus.InfoLevel)
		gin.SetMode(gin.ReleaseMode)
	}

	// ็ฆ็”จ Gin ็š„่ฐƒ่ฏ•ไฟกๆฏ่พ“ๅ‡บ
	gin.DisableConsoleColor()

	// ๅˆ›ๅปบ่ทฏ็”ฑๅ™จ๏ผˆไฝฟ็”จ gin.New() ่€Œไธๆ˜ฏ gin.Default() ไปฅ้ฟๅ…้ป˜่ฎคๆ—ฅๅฟ—๏ผ‰
	router := gin.New()

	// ๆทปๅŠ ไธญ้—ดไปถ
	router.Use(gin.Recovery())
	router.Use(middleware.CORS())
	router.Use(middleware.ErrorHandler())
	// ๅชๅœจ Debug ๆจกๅผไธ‹ๅฏ็”จ GIN ็š„ๆ—ฅๅฟ—
	if cfg.Debug {
		router.Use(gin.Logger())
	}

	// ๅˆ›ๅปบๅค„็†ๅ™จ
	handler := handlers.NewHandler(cfg)

	// ๆณจๅ†Œ่ทฏ็”ฑ
	setupRoutes(router, handler)

	// ๅˆ›ๅปบHTTPๆœๅŠกๅ™จ
	server := &http.Server{
		Addr:    fmt.Sprintf(":%d", cfg.Port),
		Handler: router,
	}

	// ๆ‰“ๅฐๅฏๅŠจไฟกๆฏ
	printStartupBanner(cfg)

	// ๅฏๅŠจๆœๅŠกๅ™จ็š„goroutine
	go func() {
		if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			logrus.Fatalf("Failed to start server: %v", err)
		}
	}()

	// ็ญ‰ๅพ…ไธญๆ–ญไฟกๅทไปฅไผ˜้›…ๅ…ณ้—ญๆœๅŠกๅ™จ
	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit
	logrus.Info("Shutting down server...")

	// ็ป™ๆœๅŠกๅ™จ5็ง’ๆ—ถ้—ดๅฎŒๆˆๅค„็†ๆญฃๅœจ่ฟ›่กŒ็š„่ฏทๆฑ‚
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	if err := server.Shutdown(ctx); err != nil {
		logrus.Fatalf("Server forced to shutdown: %v", err)
	}

	logrus.Info("Server exited")
}

func setupRoutes(router *gin.Engine, handler *handlers.Handler) {
	// ๅฅๅบทๆฃ€ๆŸฅ
	router.GET("/health", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{
			"status": "ok",
			"time":   time.Now().Unix(),
		})
	})

	// APIๆ–‡ๆกฃ้กต้ข
	router.GET("/", handler.ServeDocs)

	// API v1่ทฏ็”ฑ็ป„
	v1 := router.Group("/v1")
	{
		// ๆจกๅž‹ๅˆ—่กจ
		v1.GET("/models", middleware.AuthRequired(), handler.ListModels)

		// ่ŠๅคฉๅฎŒๆˆ
		v1.POST("/chat/completions", middleware.AuthRequired(), handler.ChatCompletions)

		// Responses API
		v1.POST("/responses", middleware.AuthRequired(), handler.Responses)
	}

	// ้™ๆ€ๆ–‡ไปถๆœๅŠก๏ผˆๅฆ‚ๆžœ้œ€่ฆ๏ผ‰
	router.Static("/static", "./static")
}

// printStartupBanner ๆ‰“ๅฐๅฏๅŠจๆจชๅน…
func printStartupBanner(cfg *config.Config) {
	banner := `
โ•”โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•—
โ•‘                      Cursor2API Server                       โ•‘
โ•šโ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•
`
	fmt.Println(banner)

	fmt.Printf("๐Ÿš€ ๆœๅŠกๅœฐๅ€:  http://localhost:%d\n", cfg.Port)
	fmt.Printf("๐Ÿ“š API ๆ–‡ๆกฃ:  http://localhost:%d/\n", cfg.Port)
	fmt.Printf("๐Ÿ’Š ๅฅๅบทๆฃ€ๆŸฅ:  http://localhost:%d/health\n", cfg.Port)
	fmt.Printf("๐Ÿ”‘ API ๅฏ†้’ฅ:  %s\n", maskAPIKey(cfg.APIKey))

	modelList := cfg.GetModels()
	fmt.Printf("\n๐Ÿค– ๆ”ฏๆŒๆจกๅž‹ (%d ไธช):\n", len(modelList))

	// ๆŒ‰็ฑปๅˆซๅˆ†็ป„ๆ˜พ็คบๆจกๅž‹
	providers := make(map[string][]string)
	for _, modelID := range modelList {
		if config, exists := models.GetModelConfig(modelID); exists {
			providers[config.Provider] = append(providers[config.Provider], modelID)
		} else {
			providers["Other"] = append(providers["Other"], modelID)
		}
	}

	// ๆŒ‰ProviderๆŽ’ๅบๅนถๆ˜พ็คบ
	for _, provider := range []string{"Anthropic", "OpenAI", "Google", "Other"} {
		if models, ok := providers[provider]; ok && len(models) > 0 {
			fmt.Printf("   %s:  %s\n", provider, strings.Join(models, ", "))
		}
	}

	if cfg.Debug {
		fmt.Println("\n๐Ÿ› ่ฐƒ่ฏ•ๆจกๅผ:  ๅทฒๅฏ็”จ")
	}

	fmt.Println("\nโœจ ๆœๅŠกๅทฒๅฏๅŠจ๏ผŒๆŒ‰ Ctrl+C ๅœๆญข")
	fmt.Println("โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”")
}

// maskAPIKey ๆŽฉ็  API ๅฏ†้’ฅ๏ผŒๅชๆ˜พ็คบๅ‰ 4 ไฝ
func maskAPIKey(key string) string {
	if len(key) <= 4 {
		return "****"
	}
	return key[:4] + "****"
}