backend-service/internal/server/server.go

package server

import (
	"fmt"
	"log"

	"attune-heart-therapy/internal/config"
	"attune-heart-therapy/internal/database"

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

type Server struct {
	config *config.Config
	db     *database.DB
	router *gin.Engine
}

func New(cfg *config.Config) *Server {
	// Set Gin mode based on environment
	gin.SetMode(gin.ReleaseMode)

	router := gin.New()

	// Add basic middleware
	router.Use(gin.Logger())
	router.Use(gin.Recovery())

	return &Server{
		config: cfg,
		router: router,
	}
}

// Initialize sets up the database connection and runs migrations
func (s *Server) Initialize() error {
	// Initialize database connection
	db, err := database.New(s.config)
	if err != nil {
		return fmt.Errorf("failed to initialize database: %w", err)
	}
	s.db = db

	// Run database migrations
	if err := s.db.Migrate(); err != nil {
		return fmt.Errorf("failed to run database migrations: %w", err)
	}

	// Seed database with initial data
	if err := s.db.Seed(); err != nil {
		return fmt.Errorf("failed to seed database: %w", err)
	}

	log.Println("Server initialization completed successfully")
	return nil
}

func (s *Server) Start() error {
	// Initialize database and run migrations
	if err := s.Initialize(); err != nil {
		return err
	}

	// Setup routes
	s.setupRoutes()

	// Start server
	addr := fmt.Sprintf("%s:%s", s.config.Server.Host, s.config.Server.Port)
	log.Printf("Starting server on %s", addr)

	return s.router.Run(addr)
}

// Shutdown gracefully shuts down the server
func (s *Server) Shutdown() error {
	if s.db != nil {
		log.Println("Closing database connection...")
		return s.db.Close()
	}
	return nil
}

func (s *Server) setupRoutes() {
	// Health check endpoint
	s.router.GET("/health", s.healthCheck)

	// API v1 routes group
	v1 := s.router.Group("/api/v1")
	{
		// Auth routes (will be implemented in later tasks)
		auth := v1.Group("/auth")
		{
			auth.POST("/register", func(c *gin.Context) {
				c.JSON(501, gin.H{"message": "Not implemented yet"})
			})
			auth.POST("/login", func(c *gin.Context) {
				c.JSON(501, gin.H{"message": "Not implemented yet"})
			})
		}

		// Booking routes (will be implemented in later tasks)
		bookings := v1.Group("/bookings")
		{
			bookings.GET("/", func(c *gin.Context) {
				c.JSON(501, gin.H{"message": "Not implemented yet"})
			})
			bookings.POST("/", func(c *gin.Context) {
				c.JSON(501, gin.H{"message": "Not implemented yet"})
			})
		}

		// Schedule routes (will be implemented in later tasks)
		schedules := v1.Group("/schedules")
		{
			schedules.GET("/", func(c *gin.Context) {
				c.JSON(501, gin.H{"message": "Not implemented yet"})
			})
		}

		// Payment routes (will be implemented in later tasks)
		payments := v1.Group("/payments")
		{
			payments.POST("/intent", func(c *gin.Context) {
				c.JSON(501, gin.H{"message": "Not implemented yet"})
			})
			payments.POST("/confirm", func(c *gin.Context) {
				c.JSON(501, gin.H{"message": "Not implemented yet"})
			})
			payments.POST("/webhook", func(c *gin.Context) {
				c.JSON(501, gin.H{"message": "Not implemented yet"})
			})
		}

		// Admin routes (will be implemented in later tasks)
		admin := v1.Group("/admin")
		{
			admin.GET("/dashboard", func(c *gin.Context) {
				c.JSON(501, gin.H{"message": "Not implemented yet"})
			})
		}
	}
}

// healthCheck handles the health check endpoint
func (s *Server) healthCheck(c *gin.Context) {
	response := gin.H{
		"status":  "ok",
		"message": "Video Conference Booking System API",
	}

	// Check database connectivity
	if s.db != nil {
		if err := s.db.Health(); err != nil {
			response["status"] = "error"
			response["database"] = "disconnected"
			response["error"] = err.Error()
			c.JSON(500, response)
			return
		}
		response["database"] = "connected"
	} else {
		response["database"] = "not initialized"
	}

	c.JSON(200, response)
}