package controller

import (
	"fmt"
	"math"
	"strconv"
	"strings"

	"gitlab.com/mbugroup/lti-api.git/internal/modules/purchases/dto"
	service "gitlab.com/mbugroup/lti-api.git/internal/modules/purchases/services"
	validation "gitlab.com/mbugroup/lti-api.git/internal/modules/purchases/validations"
	"gitlab.com/mbugroup/lti-api.git/internal/response"

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

type PurchaseController struct {
	service service.PurchaseService
}

func NewPurchaseController(s service.PurchaseService) *PurchaseController {
	return &PurchaseController{service: s}
}

func (ctrl *PurchaseController) GetAll(c *fiber.Ctx) error {
	query := &validation.PurchaseQuery{
		Page:        c.QueryInt("page", 1),
		Limit:       c.QueryInt("limit", 10),
		Search:      strings.TrimSpace(c.Query("search")),
		PrNumber:    strings.TrimSpace(c.Query("pr_number")),
		CreatedFrom: strings.TrimSpace(c.Query("created_from")),
		CreatedTo:   strings.TrimSpace(c.Query("created_to")),
	}

	if supplierID := c.QueryInt("supplier_id", 0); supplierID > 0 {
		query.SupplierID = uint(supplierID)
	}

	if status := strings.TrimSpace(c.Query("status")); status != "" {
		query.Status = strings.ToUpper(status)
	}

	results, total, err := ctrl.service.GetAll(c, query)
	if err != nil {
		return err
	}

	limit := query.Limit
	if limit <= 0 {
		limit = 10
	}
	page := query.Page
	if page <= 0 {
		page = 1
	}

	return c.Status(fiber.StatusOK).
		JSON(response.SuccessWithPaginate[dto.PurchaseListItemDTO]{
			Code:    fiber.StatusOK,
			Status:  "success",
			Message: "Purchase fetched successfully",
			Meta: response.Meta{
				Page:         page,
				Limit:        limit,
				TotalPages:   int64(math.Ceil(float64(total) / float64(limit))),
				TotalResults: total,
			},
			Data: dto.ToPurchaseListDTOs(results),
		})
}

func (ctrl *PurchaseController) GetOne(c *fiber.Ctx) error {
	param := c.Params("id")
	id, err := strconv.ParseUint(param, 10, 64)
	if err != nil || id == 0 {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid purchase id")
	}

	result, err := ctrl.service.GetOne(c, id)
	if err != nil {
		return err
	}

	return c.Status(fiber.StatusOK).
		JSON(response.Success{
			Code:    fiber.StatusOK,
			Status:  "success",
			Message: "Purchase fetched successfully",
			Data:    dto.ToPurchaseDetailDTO(*result),
		})
}

func (ctrl *PurchaseController) CreateOne(c *fiber.Ctx) error {
	req := new(validation.CreatePurchaseRequest)

	if err := c.BodyParser(req); err != nil {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid request body")
	}

	result, err := ctrl.service.CreateOne(c, req)
	if err != nil {
		return err
	}

	return c.Status(fiber.StatusCreated).
		JSON(response.Success{
			Code:    fiber.StatusCreated,
			Status:  "success",
			Message: "Purchase created successfully",
			Data:    dto.ToPurchaseDetailDTO(*result),
		})
}

func (ctrl *PurchaseController) ApproveStaffPurchase(c *fiber.Ctx) error {
	param := c.Params("id")
	id, err := strconv.ParseUint(param, 10, 64)
	if err != nil || id == 0 {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid purchase id")
	}

	req := new(validation.ApproveStaffPurchaseRequest)
	if err := c.BodyParser(req); err != nil {
		return fiber.NewError(fiber.StatusBadRequest, fmt.Sprintf("Invalid request body: %v", err))
	}

	result, err := ctrl.service.ApproveStaffPurchase(c, id, req)
	if err != nil {
		return err
	}

	return c.Status(fiber.StatusOK).
		JSON(response.Success{
			Code:    fiber.StatusOK,
			Status:  "success",
			Message: "Staff purchase approval recorded successfully",
			Data:    dto.ToPurchaseDetailDTO(*result),
		})
}


func (ctrl *PurchaseController) ApproveManagerPurchase(c *fiber.Ctx) error {
	param := c.Params("id")
	id, err := strconv.ParseUint(param, 10, 64)
	if err != nil || id == 0 {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid purchase id")
	}

	req := new(validation.ApproveManagerPurchaseRequest)
	if err := c.BodyParser(req); err != nil {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid request body")
	}

	result, err := ctrl.service.ApproveManagerPurchase(c, id, req)
	if err != nil {
		return err
	}

	return c.Status(fiber.StatusOK).
		JSON(response.Success{
			Code:    fiber.StatusOK,
			Status:  "success",
			Message: "Manager purchase approval recorded successfully",
			Data:    dto.ToPurchaseDetailDTO(*result),
		})
}

func (ctrl *PurchaseController) ReceiveProducts(c *fiber.Ctx) error {
	param := c.Params("id")
	id, err := strconv.ParseUint(param, 10, 64)
	if err != nil || id == 0 {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid purchase id")
	}

	req := new(validation.ReceivePurchaseRequest)
	if err := c.BodyParser(req); err != nil {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid request body")
	}

	result, err := ctrl.service.ReceiveProducts(c, id, req)
	if err != nil {
		return err
	}

	return c.Status(fiber.StatusOK).
		JSON(response.Success{
			Code:    fiber.StatusOK,
			Status:  "success",
			Message: "Purchase receiving recorded successfully",
			Data:    dto.ToPurchaseDetailDTO(*result),
		})
}

func (ctrl *PurchaseController) DeleteItems(c *fiber.Ctx) error {
	param := c.Params("id")
	id, err := strconv.ParseUint(param, 10, 64)
	if err != nil || id == 0 {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid purchase id")
	}

	req := new(validation.DeletePurchaseItemsRequest)
	if err := c.BodyParser(req); err != nil {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid request body")
	}

	result, err := ctrl.service.DeleteItems(c, id, req)
	if err != nil {
		return err
	}

	return c.Status(fiber.StatusOK).
		JSON(response.Success{
			Code:    fiber.StatusOK,
			Status:  "success",
			Message: "Purchase items deleted successfully",
			Data:    dto.ToPurchaseDetailDTO(*result),
		})
}

func (ctrl *PurchaseController) DeletePurchase(c *fiber.Ctx) error {
	param := c.Params("id")
	id, err := strconv.ParseUint(param, 10, 64)
	if err != nil || id == 0 {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid purchase id")
	}

	if err := ctrl.service.DeletePurchase(c, id); err != nil {
		return err
	}

	return c.Status(fiber.StatusOK).
		JSON(response.Success{
			Code:    fiber.StatusOK,
			Status:  "success",
			Message: "Purchase deleted successfully",
			Data:    nil,
		})
}