package handler

import (
	"github.com/gin-gonic/gin"

	"apskel-pos-be/internal/constants"
	"apskel-pos-be/internal/contract"
	"apskel-pos-be/internal/service"
	"apskel-pos-be/internal/util"
)

// CustomerDeviceHandler serves /customer/devices, where the customer app registers
// the FCM token of each device it runs on.
type CustomerDeviceHandler struct {
	devices service.CustomerDeviceService
}

func NewCustomerDeviceHandler(devices service.CustomerDeviceService) *CustomerDeviceHandler {
	return &CustomerDeviceHandler{devices: devices}
}

// Register is PUT /customer/devices.
func (h *CustomerDeviceHandler) Register(c *gin.Context) {
	customerID, ok := customerIDFromGin(c, "CustomerDeviceHandler::Register")
	if !ok {
		return
	}
	var req contract.RegisterCustomerDeviceRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{
			contract.NewResponseError(constants.MissingFieldErrorCode, constants.RequestEntity, "device_id and fcm_token are required"),
		}), "CustomerDeviceHandler::Register")
		return
	}
	util.HandleResponse(c.Writer, c.Request, h.devices.Register(c.Request.Context(), customerID, &req), "CustomerDeviceHandler::Register")
}

// Unregister is DELETE /customer/devices/:device_id, for logout.
func (h *CustomerDeviceHandler) Unregister(c *gin.Context) {
	customerID, ok := customerIDFromGin(c, "CustomerDeviceHandler::Unregister")
	if !ok {
		return
	}
	util.HandleResponse(c.Writer, c.Request, h.devices.Unregister(c.Request.Context(), customerID, c.Param("device_id")), "CustomerDeviceHandler::Unregister")
}