package controller

import (
	"math"
	"strconv"
	"strings"

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

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

type TransactionController struct {
	TransactionService service.TransactionService
}

func NewTransactionController(transactionService service.TransactionService) *TransactionController {
	return &TransactionController{
		TransactionService: transactionService,
	}
}

func (u *TransactionController) GetAll(c *fiber.Ctx) error {
	parseOptionalUint := func(key string) (*uint, error) {
		raw := strings.TrimSpace(c.Query(key, ""))
		if raw == "" {
			return nil, nil
		}
		parsed, err := strconv.ParseUint(raw, 10, 64)
		if err != nil {
			return nil, fiber.NewError(fiber.StatusBadRequest, "Invalid "+key)
		}
		if parsed == 0 {
			return nil, nil
		}
		value := uint(parsed)
		return &value, nil
	}

	bankId, err := parseOptionalUint("bank_id")
	if err != nil {
		return err
	}
	customerId, err := parseOptionalUint("customer_id")
	if err != nil {
		return err
	}
	supplierId, err := parseOptionalUint("supplier_id")
	if err != nil {
		return err
	}

	query := &validation.Query{
		Page:            c.QueryInt("page", 1),
		Limit:           c.QueryInt("limit", 10),
		Search:          c.Query("search", ""),
		TransactionType: c.Query("transaction_type", ""),
		BankId:          bankId,
		CustomerId:      customerId,
		SupplierId:      supplierId,
		SortDate:        c.Query("sort_date", ""),
		StartDate:       c.Query("start_date", ""),
		EndDate:         c.Query("end_date", ""),
	}

	if query.Page < 1 || query.Limit < 1 {
		return fiber.NewError(fiber.StatusBadRequest, "page and limit must be greater than 0")
	}

	result, totalResults, err := u.TransactionService.GetAll(c, query)
	if err != nil {
		return err
	}

	return c.Status(fiber.StatusOK).
		JSON(response.SuccessWithPaginate[dto.TransactionListDTO]{
			Code:    fiber.StatusOK,
			Status:  "success",
			Message: "Get all transactions successfully",
			Meta: response.Meta{
				Page:         query.Page,
				Limit:        query.Limit,
				TotalPages:   int64(math.Ceil(float64(totalResults) / float64(query.Limit))),
				TotalResults: totalResults,
			},
			Data: dto.ToTransactionListDTOs(result),
		})
}

func (u *TransactionController) GetOne(c *fiber.Ctx) error {
	param := c.Params("id")

	id, err := strconv.Atoi(param)
	if err != nil {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid Id")
	}

	result, err := u.TransactionService.GetOne(c, uint(id))
	if err != nil {
		return err
	}

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

func (u *TransactionController) DeleteOne(c *fiber.Ctx) error {
	param := c.Params("id")

	id, err := strconv.Atoi(param)
	if err != nil {
		return fiber.NewError(fiber.StatusBadRequest, "Invalid Id")
	}

	if err := u.TransactionService.DeleteOne(c, uint(id)); err != nil {
		return err
	}

	return c.Status(fiber.StatusOK).
		JSON(response.Common{
			Code:    fiber.StatusOK,
			Status:  "success",
			Message: "Delete transaction successfully",
		})
}