package services

import (
	"net/http"
	"strconv"
	"wm-backend/global"
	"wm-backend/internal/models"
	"wm-backend/internal/models/requests"
	"wm-backend/internal/models/responses"
	"wm-backend/internal/repositories"
	"wm-backend/pkg/helper"
	"wm-backend/response"

	"github.com/gin-gonic/gin"
	"github.com/rs/zerolog/log"
)

// InvoiceConfigItemCreate creates a new invoice config item.
//
// @Summary      Create a new invoice config item
// @Description  Create a new invoice config item with the provided details
// @Tags         invoice-config-item
// @Accept       json
// @Produce      json
// @Param        body  body  requests.CreateInvoiceConfigItemRequest  true  "Invoice config item request body"
// @Success      201   {object}  response.SuccessResponse{data=responses.CreateInvoiceConfigItemResponse}
// @Failure      400   {object}  response.ErrorResponse
// @Failure      500   {object}  response.ErrorResponse
// @Router       /v1/invoice-config-items [post]
func InvoiceConfigItemCreate(c *gin.Context) error {
	requestBody := requests.CreateInvoiceConfigItemRequest{}
	if helper.IsShouldBindJSON(c, &requestBody) {
		return nil
	}
	invoiceConfigItemModel := &models.InvoiceConfigItem{
		InvoiceConfigID:  requestBody.InvoiceConfigID,
		ComponentID:      requestBody.ComponentID,
		RequiredQuantity: requestBody.RequiredQuantity,
		AllowAlternative: requestBody.AllowAlternative,
		PriorityOrder:    requestBody.PriorityOrder,
		Note:             requestBody.Note,
	}
	invoiceConfigItem, err := repositories.CreateInvoiceConfigItem(c.Request.Context(), global.Queries, *invoiceConfigItemModel)
	if err != nil {
		log.Error().Err(err).Msg("Failed to create invoice config item")
		response.InternalServerError(c, http.StatusInternalServerError, "Failed to create invoice config item")
		return nil
	}
	response.Created(c, "Invoice config item created successfully", &responses.CreateInvoiceConfigItemResponse{
		ID: invoiceConfigItem.ID,
	})
	return nil
}

// InvoiceConfigItemGetByID retrieves a single invoice config item by its ID.
//
// @Summary      Get invoice config item by ID
// @Description  Retrieve a single invoice config item using its unique identifier
// @Tags         invoice-config-item
// @Accept       json
// @Produce      json
// @Param        id   path      int  true  "Invoice config item ID"
// @Success      200  {object}  response.SuccessResponse{data=models.InvoiceConfigItem}
// @Failure      400  {object}  response.ErrorResponse
// @Failure      404  {object}  response.ErrorResponse
// @Failure      500  {object}  response.ErrorResponse
// @Router       /v1/invoice-config-items/{id} [get]
func InvoiceConfigItemGetByID(c *gin.Context) error {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		response.BadRequestError(c, http.StatusBadRequest, "Invalid ID")
		return nil
	}
	invoiceConfigItem, err := repositories.GetInvoiceConfigItemByID(c.Request.Context(), global.Queries, id)
	if err != nil {
		log.Error().Err(err).Msgf("Failed to get invoice config item by ID: %d", id)
		response.NotFoundError(c, http.StatusNotFound, "Invoice config item not found")
		return nil
	}
	response.Ok(c, "Success", invoiceConfigItem)
	return nil
}

// InvoiceConfigItemList retrieves all invoice config items.
//
// @Summary      List all invoice config items
// @Description  Retrieve a list of all invoice config items
// @Tags         invoice-config-item
// @Accept       json
// @Produce      json
// @Success      200  {object}  response.SuccessResponse{data=[]models.InvoiceConfigItem}
// @Failure      500  {object}  response.ErrorResponse
// @Router       /v1/invoice-config-items [get]
func InvoiceConfigItemList(c *gin.Context) error {
	invoiceConfigItems, err := repositories.ListInvoiceConfigItems(c.Request.Context(), global.Queries)
	if err != nil {
		response.InternalServerError(c, http.StatusInternalServerError, "Failed to list invoice config items")
		return nil
	}
	response.Ok(c, "Success", invoiceConfigItems)
	return nil
}

// InvoiceConfigItemUpdate updates an existing invoice config item by its ID.
//
// @Summary      Update invoice config item
// @Description  Update an existing invoice config item by its ID. Only non-empty fields will be updated.
// @Tags         invoice-config-item
// @Accept       json
// @Produce      json
// @Param        id    path      int                                  true  "Invoice config item ID"
// @Param        body  body      requests.UpdateInvoiceConfigItemRequest  true  "Invoice config item request body"
// @Success      200   {object}  response.SuccessResponse{data=responses.UpdateInvoiceConfigItemResponse}
// @Failure      400   {object}  response.ErrorResponse
// @Failure      404   {object}  response.ErrorResponse
// @Failure      500   {object}  response.ErrorResponse
// @Router       /v1/invoice-config-items/{id} [put]
func InvoiceConfigItemUpdate(c *gin.Context) error {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		response.BadRequestError(c, http.StatusBadRequest, "Invalid ID")
		return nil
	}
	requestBody := requests.UpdateInvoiceConfigItemRequest{}
	if helper.IsShouldBindJSON(c, &requestBody) {
		return nil
	}
	existing, err := repositories.GetInvoiceConfigItemByID(c.Request.Context(), global.Queries, id)
	if err != nil {
		response.NotFoundError(c, http.StatusNotFound, "Invoice config item not found")
		return nil
	}
	if requestBody.RequiredQuantity != nil {
		existing.RequiredQuantity = *requestBody.RequiredQuantity
	}
	if requestBody.AllowAlternative != nil {
		existing.AllowAlternative = *requestBody.AllowAlternative
	}
	if requestBody.PriorityOrder != nil {
		existing.PriorityOrder = *requestBody.PriorityOrder
	}
	if requestBody.Note != "" {
		existing.Note = requestBody.Note
	}
	invoiceConfigItem, err := repositories.UpdateInvoiceConfigItem(c.Request.Context(), global.Queries, existing)
	if err != nil {
		log.Error().Err(err).Msgf("Failed to update invoice config item with ID: %d", id)
		response.InternalServerError(c, http.StatusInternalServerError, "Failed to update invoice config item")
		return nil
	}
	response.Ok(c, "Invoice config item updated successfully", &responses.UpdateInvoiceConfigItemResponse{
		ID:               invoiceConfigItem.ID,
		InvoiceConfigID:  invoiceConfigItem.InvoiceConfigID,
		ComponentID:      invoiceConfigItem.ComponentID,
		RequiredQuantity: invoiceConfigItem.RequiredQuantity,
		AllowAlternative: invoiceConfigItem.AllowAlternative,
		PriorityOrder:    invoiceConfigItem.PriorityOrder,
		Note:             invoiceConfigItem.Note,
	})
	return nil
}

// InvoiceConfigItemDelete deletes an invoice config item by its ID.
//
// @Summary      Delete invoice config item
// @Description  Delete an invoice config item by its unique identifier
// @Tags         invoice-config-item
// @Accept       json
// @Produce      json
// @Param        id   path      int  true  "Invoice config item ID"
// @Success      200  {object}  response.SuccessResponse
// @Failure      400  {object}  response.ErrorResponse
// @Failure      500  {object}  response.ErrorResponse
// @Router       /v1/invoice-config-items/{id} [delete]
func InvoiceConfigItemDelete(c *gin.Context) error {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		response.BadRequestError(c, http.StatusBadRequest, "Invalid ID")
		return nil
	}
	rowsAffected, err := repositories.DeleteInvoiceConfigItem(c.Request.Context(), global.Queries, id)
	if err != nil {
		log.Error().Err(err).Msgf("Failed to delete invoice config item with ID: %d", id)
		response.InternalServerError(c, http.StatusInternalServerError, "Failed to delete invoice config item")
		return nil
	}
	if rowsAffected == 0 {
		response.NotFoundError(c, http.StatusNotFound, "Invoice config item not found")
		return nil
	}
	response.Ok(c, "Delete Success", nil)
	return nil
}