package main

import (
	"log"
	"os"

	"server/internal/db"
	"server/internal/handlers"
	"server/internal/qldt"
	"server/internal/syncjobs"

	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/cors"
	"github.com/joho/godotenv"
)

func main() {
	// Nạp file env nếu có
	if err := godotenv.Load(); err != nil {
		log.Println("Note: .env file not found or couldn't be loaded, using system environments.")
	}

	// Đọc cấu hình database
	dbHost := getEnv("DB_HOST", "127.0.0.1")
	dbPort := getEnv("DB_PORT", "3306")
	dbUser := getEnv("DB_USER", "naruto")
	dbPass := getEnv("DB_PASSWORD", "29121999aA@")
	dbName := getEnv("DB_NAME", "simple_care")

	// Đọc token và link QLĐT
	qldtToken := getEnv("QLDT_TOKEN", "")
	qldtBaseURL := getEnv("QLDT_BASE_URL", "https://apiportal.rikkei.edu.vn")
	qldtOrigin := getEnv("QLDT_ORIGIN", "https://qldt.rikkei.edu.vn")

	if qldtToken == "" {
		log.Println("WARNING: QLDT_TOKEN is empty! Sync features will fail until QLDT_TOKEN is configured in environment.")
	}

	// 1. Kết nối DB & Chạy Migration
	gormDB, err := db.ConnectDB(dbHost, dbPort, dbUser, dbPass, dbName)
	if err != nil {
		log.Fatalf("Database connection failed: %v", err)
	}

	if err := db.AutoMigrate(gormDB); err != nil {
		log.Fatalf("Database migration failed: %v", err)
	}

	// 2. Tạo Client QLĐT & Sync Jobs
	qldtClient := qldt.NewClient(qldtBaseURL, qldtOrigin)
	classesJob := syncjobs.NewClassesSyncJob()
	studentsJob := syncjobs.NewStudentsSyncJob()

	// 3. Khởi tạo Fiber Web Server
	app := fiber.New(fiber.Config{
		AppName: "Simple Care Sync Backend",
	})

	// Bật CORS để Client có thể gọi API mà không bị chặn
	app.Use(cors.New(cors.Config{
		AllowOrigins: "*",
		AllowHeaders: "Origin, Content-Type, Accept, Authorization",
		AllowMethods: "GET, POST, PATCH, PUT, DELETE, OPTIONS",
	}))

	// 4. Setup Routes
	api := app.Group("/api")

	// Dashboard Stats
	api.Get("/stats", handlers.GetStatsHandler(gormDB))

	// Classes endpoints
	api.Get("/classes", handlers.ListClassesHandler(gormDB))
	api.Patch("/classes/:rkId/studying", handlers.PatchClassStudyingHandler(gormDB))
	api.Get("/classes/:rkId/students", handlers.ListClassStudentsHandler(gormDB))

	// Students endpoints
	api.Get("/students", handlers.ListAllStudentsHandler(gormDB))

	// Sync endpoints
	api.Post("/sync/classes/start", handlers.StartClassesSyncHandler(gormDB, qldtClient, classesJob, qldtToken))
	api.Get("/sync/classes/status", handlers.GetClassesSyncStatusHandler(classesJob))
	api.Post("/sync/students/start", handlers.StartStudentsSyncHandler(gormDB, qldtClient, studentsJob, qldtToken))
	api.Get("/sync/students/status", handlers.GetStudentsSyncStatusHandler(studentsJob))

	// Chạy app ở port 8080
	port := getEnv("PORT", "8080")
	log.Printf("Server starting on port %s...", port)
	if err := app.Listen(":" + port); err != nil {
		log.Fatalf("Failed to start web server: %v", err)
	}
}

func getEnv(key, defaultVal string) string {
	if val := os.Getenv(key); val != "" {
		return val
	}
	return defaultVal
}