package handler

import (
	"strconv"

	"apskel-pos-be/internal/constants"
	"apskel-pos-be/internal/contract"
	"apskel-pos-be/internal/logger"
	"apskel-pos-be/internal/service"
	"apskel-pos-be/internal/util"
	"apskel-pos-be/internal/validator"

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

type RewardHandler struct {
	rewardService   service.RewardService
	rewardValidator validator.RewardValidator
}

func NewRewardHandler(rewardService service.RewardService, rewardValidator validator.RewardValidator) *RewardHandler {
	return &RewardHandler{
		rewardService:   rewardService,
		rewardValidator: rewardValidator,
	}
}

func (h *RewardHandler) CreateReward(c *gin.Context) {
	ctx := c.Request.Context()

	var req contract.CreateRewardRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::CreateReward -> request binding failed")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::CreateReward")
		return
	}

	validationError, validationErrorCode := h.rewardValidator.ValidateCreateRewardRequest(&req)
	if validationError != nil {
		logger.FromContext(c.Request.Context()).WithError(validationError).Error("RewardHandler::CreateReward -> request validation failed")
		validationResponseError := contract.NewResponseError(validationErrorCode, constants.RequestEntity, validationError.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::CreateReward")
		return
	}

	response, err := h.rewardService.CreateReward(ctx, &req)
	if err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::CreateReward -> service call failed")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{contract.NewResponseError(constants.InternalServerErrorCode, constants.RewardEntity, err.Error())}), "RewardHandler::CreateReward")
		return
	}

	util.HandleResponse(c.Writer, c.Request, contract.BuildSuccessResponse(response), "RewardHandler::CreateReward")
}

func (h *RewardHandler) GetReward(c *gin.Context) {
	ctx := c.Request.Context()

	idStr := c.Param("id")
	if idStr == "" {
		logger.FromContext(c.Request.Context()).Error("RewardHandler::GetReward -> missing ID parameter")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RewardEntity, "ID parameter is required")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::GetReward")
		return
	}

	response, err := h.rewardService.GetReward(ctx, idStr)
	if err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::GetReward -> service call failed")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{contract.NewResponseError(constants.InternalServerErrorCode, constants.RewardEntity, err.Error())}), "RewardHandler::GetReward")
		return
	}

	util.HandleResponse(c.Writer, c.Request, contract.BuildSuccessResponse(response), "RewardHandler::GetReward")
}

func (h *RewardHandler) ListRewards(c *gin.Context) {
	ctx := c.Request.Context()

	var req contract.ListRewardsRequest
	if err := c.ShouldBindQuery(&req); err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::ListRewards -> request binding failed")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::ListRewards")
		return
	}

	validationError, validationErrorCode := h.rewardValidator.ValidateListRewardsRequest(&req)
	if validationError != nil {
		logger.FromContext(c.Request.Context()).WithError(validationError).Error("RewardHandler::ListRewards -> request validation failed")
		validationResponseError := contract.NewResponseError(validationErrorCode, constants.RequestEntity, validationError.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::ListRewards")
		return
	}

	response, err := h.rewardService.ListRewards(ctx, &req)
	if err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::ListRewards -> service call failed")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{contract.NewResponseError(constants.InternalServerErrorCode, constants.RewardEntity, err.Error())}), "RewardHandler::ListRewards")
		return
	}

	util.HandleResponse(c.Writer, c.Request, contract.BuildSuccessResponse(response), "RewardHandler::ListRewards")
}

func (h *RewardHandler) UpdateReward(c *gin.Context) {
	ctx := c.Request.Context()

	var req contract.UpdateRewardRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::UpdateReward -> request binding failed")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RequestEntity, err.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::UpdateReward")
		return
	}

	validationError, validationErrorCode := h.rewardValidator.ValidateUpdateRewardRequest(&req)
	if validationError != nil {
		logger.FromContext(c.Request.Context()).WithError(validationError).Error("RewardHandler::UpdateReward -> request validation failed")
		validationResponseError := contract.NewResponseError(validationErrorCode, constants.RequestEntity, validationError.Error())
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::UpdateReward")
		return
	}

	response, err := h.rewardService.UpdateReward(ctx, &req)
	if err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::UpdateReward -> service call failed")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{contract.NewResponseError(constants.InternalServerErrorCode, constants.RewardEntity, err.Error())}), "RewardHandler::UpdateReward")
		return
	}

	util.HandleResponse(c.Writer, c.Request, contract.BuildSuccessResponse(response), "RewardHandler::UpdateReward")
}

func (h *RewardHandler) DeleteReward(c *gin.Context) {
	ctx := c.Request.Context()

	idStr := c.Param("id")
	if idStr == "" {
		logger.FromContext(c.Request.Context()).Error("RewardHandler::DeleteReward -> missing ID parameter")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RewardEntity, "ID parameter is required")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::DeleteReward")
		return
	}

	err := h.rewardService.DeleteReward(ctx, idStr)
	if err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::DeleteReward -> service call failed")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{contract.NewResponseError(constants.InternalServerErrorCode, constants.RewardEntity, err.Error())}), "RewardHandler::DeleteReward")
		return
	}

	util.HandleResponse(c.Writer, c.Request, contract.BuildSuccessResponse("Reward deleted successfully"), "RewardHandler::DeleteReward")
}

func (h *RewardHandler) UpdateRewardStock(c *gin.Context) {
	ctx := c.Request.Context()

	idStr := c.Param("id")
	if idStr == "" {
		logger.FromContext(c.Request.Context()).Error("RewardHandler::UpdateRewardStock -> missing ID parameter")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RewardEntity, "ID parameter is required")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::UpdateRewardStock")
		return
	}

	stockStr := c.Param("stock")
	stock, err := strconv.Atoi(stockStr)
	if err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::UpdateRewardStock -> invalid stock parameter")
		validationResponseError := contract.NewResponseError(constants.InvalidFieldErrorCode, constants.RewardEntity, "Invalid stock parameter")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::UpdateRewardStock")
		return
	}

	err = h.rewardService.UpdateRewardStock(ctx, idStr, stock)
	if err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::UpdateRewardStock -> service call failed")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{contract.NewResponseError(constants.InternalServerErrorCode, constants.RewardEntity, err.Error())}), "RewardHandler::UpdateRewardStock")
		return
	}

	util.HandleResponse(c.Writer, c.Request, contract.BuildSuccessResponse("Reward stock updated successfully"), "RewardHandler::UpdateRewardStock")
}

func (h *RewardHandler) GetRewardsByType(c *gin.Context) {
	ctx := c.Request.Context()

	rewardType := c.Param("type")
	if rewardType == "" {
		logger.FromContext(c.Request.Context()).Error("RewardHandler::GetRewardsByType -> missing type parameter")
		validationResponseError := contract.NewResponseError(constants.MissingFieldErrorCode, constants.RewardEntity, "Type parameter is required")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{validationResponseError}), "RewardHandler::GetRewardsByType")
		return
	}

	response, err := h.rewardService.GetRewardsByType(ctx, rewardType)
	if err != nil {
		logger.FromContext(c.Request.Context()).WithError(err).Error("RewardHandler::GetRewardsByType -> service call failed")
		util.HandleResponse(c.Writer, c.Request, contract.BuildErrorResponse([]*contract.ResponseError{contract.NewResponseError(constants.InternalServerErrorCode, constants.RewardEntity, err.Error())}), "RewardHandler::GetRewardsByType")
		return
	}

	util.HandleResponse(c.Writer, c.Request, contract.BuildSuccessResponse(response), "RewardHandler::GetRewardsByType")
}