backend-service/internal/services/interfaces.go

package services

import (
	"time"

	"attune-heart-therapy/internal/models"

	"github.com/stripe/stripe-go/v76"
)

// UserService handles user-related operations
type UserService interface {
	Register(req RegisterRequest) (*models.User, error)
	Login(email, password string) (*models.User, string, error) // returns user and JWT token
	GetProfile(userID uint) (*models.User, error)
	UpdateProfile(userID uint, req UpdateProfileRequest) (*models.User, error)
}

// BookingService handles booking operations
type BookingService interface {
	GetAvailableSlots(date time.Time) ([]models.Schedule, error)
	CreateBooking(userID uint, req BookingRequest) (*models.Booking, error)
	GetUserBookings(userID uint) ([]models.Booking, error)
	CancelBooking(userID, bookingID uint) error
	RescheduleBooking(userID, bookingID uint, newScheduleID uint) error
}

// PaymentService handles Stripe integration
type PaymentService interface {
	CreatePaymentIntent(amount float64, currency string) (*stripe.PaymentIntent, error)
	ConfirmPayment(paymentIntentID string) (*stripe.PaymentIntent, error)
	HandleWebhook(payload []byte, signature string) error
}

// NotificationService handles email notifications
type NotificationService interface {
	SendWelcomeEmail(user *models.User) error
	SendPaymentNotification(user *models.User, booking *models.Booking, success bool) error
	SendMeetingInfo(user *models.User, booking *models.Booking) error
	SendReminder(user *models.User, booking *models.Booking) error
	ScheduleReminder(bookingID uint, reminderTime time.Time) error
	ProcessPendingNotifications() error
}

// JitsiService handles video conference integration
type JitsiService interface {
	CreateMeeting(bookingID uint, scheduledAt time.Time) (*JitsiMeeting, error)
	GetMeetingURL(roomID string) string
	DeleteMeeting(roomID string) error
}

// JitsiMeeting represents a Jitsi meeting
type JitsiMeeting struct {
	RoomID  string `json:"room_id"`
	RoomURL string `json:"room_url"`
}

// Request/Response DTOs
type RegisterRequest struct {
	FirstName   string    `json:"first_name" binding:"required"`
	LastName    string    `json:"last_name" binding:"required"`
	Email       string    `json:"email" binding:"required,email"`
	Phone       string    `json:"phone"`
	Location    string    `json:"location"`
	DateOfBirth time.Time `json:"date_of_birth"`
	Password    string    `json:"password" binding:"required,min=6"`
}

type UpdateProfileRequest struct {
	FirstName   string    `json:"first_name"`
	LastName    string    `json:"last_name"`
	Phone       string    `json:"phone"`
	Location    string    `json:"location"`
	DateOfBirth time.Time `json:"date_of_birth"`
}

type BookingRequest struct {
	ScheduleID uint    `json:"schedule_id" binding:"required"`
	Notes      string  `json:"notes"`
	Amount     float64 `json:"amount" binding:"required"`
}

// Payment DTOs
type CreatePaymentIntentRequest struct {
	Amount   float64 `json:"amount" binding:"required,gt=0"`
	Currency string  `json:"currency"`
}

type ConfirmPaymentRequest struct {
	PaymentIntentID string `json:"payment_intent_id" binding:"required"`
}