package handler

import (
	"BE-MiniERP/database"
	"BE-MiniERP/modules/inventory/models"
	"BE-MiniERP/modules/inventory/repository"
	"BE-MiniERP/modules/inventory/service"
	"strconv"

	"github.com/gofiber/fiber/v2"
)

type ProductHandler struct {
	Repo *repository.ProductRepository
}

func NewProductHandler() *ProductHandler {
	return &ProductHandler{
		Repo: repository.NewProductRepository(database.DB),
	}
}

func (h *ProductHandler) GetAll(c *fiber.Ctx) error {
	products, err := h.Repo.FindAll()
	if err != nil {
		return c.Status(500).JSON(fiber.Map{"error": "Failed to fetch products"})
	}
	return c.JSON(products)
}

func (h *ProductHandler) Create(c *fiber.Ctx) error {
	var input models.Product
	if err := c.BodyParser(&input); err != nil {
		return c.Status(400).JSON(fiber.Map{"error": "Invalid input"})
	}

	// Jika hanya terima ID, lakukan preload relasi
	if err := h.Repo.PreloadRelations(&input); err != nil {
		return c.Status(400).JSON(fiber.Map{"error": "Failed to preload relations"})
	}

	// Generate SKU
	sku, err := service.GenerateSKU(&input)
	if err != nil {
		return c.Status(400).JSON(fiber.Map{"error": "Failed to generate SKU: " + err.Error()})
	}
	input.SKU = sku

	if err := h.Repo.Create(&input); err != nil {
		return c.Status(500).JSON(fiber.Map{"error": "Failed to create product"})
	}

	return c.JSON(input)
}

func (h *ProductHandler) Update(c *fiber.Ctx) error {
	id, _ := strconv.Atoi(c.Params("id"))
	var input models.Product
	if err := c.BodyParser(&input); err != nil {
		return c.Status(400).JSON(fiber.Map{"error": "Invalid input"})
	}
	if err := h.Repo.Update(uint(id), &input); err != nil {
		return c.Status(500).JSON(fiber.Map{"error": "Failed to update product"})
	}
	return c.JSON(fiber.Map{"message": "Product updated"})
}

func (h *ProductHandler) Delete(c *fiber.Ctx) error {
	id, _ := strconv.Atoi(c.Params("id"))
	if err := h.Repo.Delete(uint(id)); err != nil {
		return c.Status(500).JSON(fiber.Map{"error": "Failed to delete product"})
	}
	return c.JSON(fiber.Map{"message": "Product deleted"})
}