package service

import (
	"context"
	"encoding/json"
	"errors"
	"math"
	"strconv"
	"strings"
	"time"

	commonSvc "gitlab.com/mbugroup/lti-api.git/internal/common/service"
	entity "gitlab.com/mbugroup/lti-api.git/internal/entities"
	"gitlab.com/mbugroup/lti-api.git/internal/modules/closings/dto"
	repository "gitlab.com/mbugroup/lti-api.git/internal/modules/closings/repositories"
	validation "gitlab.com/mbugroup/lti-api.git/internal/modules/closings/validations"
	expenseRealizationRepository "gitlab.com/mbugroup/lti-api.git/internal/modules/expenses/repositories"
	marketingDeliveryProductRepository "gitlab.com/mbugroup/lti-api.git/internal/modules/marketing/repositories"
	marketingRepository "gitlab.com/mbugroup/lti-api.git/internal/modules/marketing/repositories"
	chickinRepository "gitlab.com/mbugroup/lti-api.git/internal/modules/production/chickins/repositories"
	projectflockRepository "gitlab.com/mbugroup/lti-api.git/internal/modules/production/project_flocks/repositories"
	recordingRepository "gitlab.com/mbugroup/lti-api.git/internal/modules/production/recordings/repositories"
	purchaseRepository "gitlab.com/mbugroup/lti-api.git/internal/modules/purchases/repositories"
	"gitlab.com/mbugroup/lti-api.git/internal/utils"
	approvalutils "gitlab.com/mbugroup/lti-api.git/internal/utils/approvals"

	"github.com/go-playground/validator/v10"
	"github.com/gofiber/fiber/v2"
	"github.com/sirupsen/logrus"
	"gorm.io/gorm"
)

type ClosingService interface {
	GetAll(ctx *fiber.Ctx, params *validation.Query) ([]dto.ClosingListItemDTO, int64, error)
	GetProjectFlockByID(ctx *fiber.Ctx, id uint) (*entity.ProjectFlock, error)
	GetPenjualan(ctx *fiber.Ctx, projectFlockID uint, projectFlockKandangID *uint) ([]entity.MarketingDeliveryProduct, error)
	GetClosingSummary(ctx *fiber.Ctx, projectFlockID uint) (*dto.ClosingSummaryDTO, error)
	GetOverhead(ctx *fiber.Ctx, projectFlockID uint, projectFlockKandangID *uint) (*dto.OverheadListDTO, error)
	GetClosingDataProduksi(ctx *fiber.Ctx, projectFlockID uint) (*dto.ClosingProductionReportDTO, error)
	GetClosingSapronak(ctx *fiber.Ctx, projectFlockID uint, params *validation.ClosingSapronakQuery) ([]dto.ClosingSapronakItemDTO, int64, error)
	GetClosingKeuangan(ctx *fiber.Ctx, projectFlockID uint) (*dto.ReportResponse, error)
	GetExpeditionHPP(ctx *fiber.Ctx, projectFlockID uint, projectFlockKandangID *uint) (*dto.ExpeditionHPPDTO, error)
}

type closingService struct {
	Log                          *logrus.Logger
	Validate                     *validator.Validate
	Repository                   repository.ClosingRepository
	ProjectFlockRepo             projectflockRepository.ProjectflockRepository
	ProjectFlockKandangRepo      projectflockRepository.ProjectFlockKandangRepository
	MarketingRepo                marketingRepository.MarketingRepository
	MarketingDeliveryProductRepo marketingDeliveryProductRepository.MarketingDeliveryProductRepository
	ApprovalSvc                  commonSvc.ApprovalService
	ExpenseRealizationRepo       expenseRealizationRepository.ExpenseRealizationRepository
	ProjectBudgetRepo            projectflockRepository.ProjectBudgetRepository
	ChickinRepo                  chickinRepository.ProjectChickinRepository
	PurchaseRepo                 purchaseRepository.PurchaseRepository
	RecordingRepo                recordingRepository.RecordingRepository
}

func NewClosingService(repo repository.ClosingRepository, projectFlockRepo projectflockRepository.ProjectflockRepository, projectFlockKandangRepo projectflockRepository.ProjectFlockKandangRepository, marketingRepo marketingRepository.MarketingRepository, marketingDeliveryProductRepo marketingDeliveryProductRepository.MarketingDeliveryProductRepository, approvalSvc commonSvc.ApprovalService, expenseRealizationRepo expenseRealizationRepository.ExpenseRealizationRepository, projectBudgetRepo projectflockRepository.ProjectBudgetRepository, chickinRepo chickinRepository.ProjectChickinRepository, purchaseRepo purchaseRepository.PurchaseRepository, recordingRepo recordingRepository.RecordingRepository, validate *validator.Validate) ClosingService {
	return &closingService{
		Log:                          utils.Log,
		Validate:                     validate,
		Repository:                   repo,
		ProjectFlockRepo:             projectFlockRepo,
		ProjectFlockKandangRepo:      projectFlockKandangRepo,
		MarketingRepo:                marketingRepo,
		MarketingDeliveryProductRepo: marketingDeliveryProductRepo,
		ApprovalSvc:                  approvalSvc,
		ExpenseRealizationRepo:       expenseRealizationRepo,
		ProjectBudgetRepo:            projectBudgetRepo,
		ChickinRepo:                  chickinRepo,
		PurchaseRepo:                 purchaseRepo,
		RecordingRepo:                recordingRepo,
	}
}

func (s closingService) withRelations(db *gorm.DB) *gorm.DB {
	return db.Preload("CreatedUser")
}

func (s closingService) withClosingRelations(db *gorm.DB) *gorm.DB {
	return s.withRelations(db).
		Preload("Location").
		Preload("KandangHistory").
		Preload("KandangHistory.Chickins")
}

func (s closingService) GetAll(c *fiber.Ctx, params *validation.Query) ([]dto.ClosingListItemDTO, int64, error) {
	if err := s.Validate.Struct(params); err != nil {
		return nil, 0, err
	}

	offset := (params.Page - 1) * params.Limit

	closings, total, err := s.Repository.GetAll(c.Context(), offset, params.Limit, func(db *gorm.DB) *gorm.DB {
		db = s.withClosingRelations(db)
		if params.Search != "" {
			return db.Where("flock_name ILIKE ?", "%"+params.Search+"%")
		}
		return db.Order("created_at DESC").Order("updated_at DESC")
	})

	if err != nil {
		s.Log.Errorf("Failed to get closings: %+v", err)
		return nil, 0, err
	}

	result := make([]dto.ClosingListItemDTO, 0, len(closings))
	for _, closing := range closings {
		statusProject, _, err := s.getApprovalStatuses(c.Context(), closing.Id)
		if err != nil {
			s.Log.Errorf("Failed to retrieve approval statuses for project flock %d: %+v", closing.Id, err)
			return nil, 0, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch approval status")
		}

		result = append(result, dto.ToClosingListItemDTO(closing, statusProject))
	}

	return result, total, nil
}

func (s closingService) GetProjectFlockByID(c *fiber.Ctx, id uint) (*entity.ProjectFlock, error) {
	projectFlock, err := s.ProjectFlockRepo.GetByID(c.Context(), id, s.withRelations)
	if errors.Is(err, gorm.ErrRecordNotFound) {
		return nil, fiber.NewError(fiber.StatusNotFound, "Project Flock not found")
	}
	if err != nil {
		return nil, err
	}
	return projectFlock, nil
}

func (s closingService) GetPenjualan(c *fiber.Ctx, projectFlockID uint, projectFlockKandangID *uint) ([]entity.MarketingDeliveryProduct, error) {

	realisasi, err := s.MarketingDeliveryProductRepo.GetClosingPenjualan(c.Context(), projectFlockID, projectFlockKandangID)
	if err != nil {
		return nil, err
	}
	if len(realisasi) == 0 {
		return []entity.MarketingDeliveryProduct{}, nil
	}

	return realisasi, nil
}

func (s closingService) GetClosingSummary(c *fiber.Ctx, projectFlockID uint) (*dto.ClosingSummaryDTO, error) {
	if projectFlockID == 0 {
		return nil, fiber.NewError(fiber.StatusBadRequest, "Invalid project flock id")
	}

	project, err := s.Repository.GetByID(c.Context(), projectFlockID, s.withClosingRelations)
	if errors.Is(err, gorm.ErrRecordNotFound) {
		return nil, fiber.NewError(fiber.StatusNotFound, "Project flock not found")
	}
	if err != nil {
		s.Log.Errorf("Failed get project flock %d for closing summary: %+v", projectFlockID, err)
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch project flock")
	}

	statusProject, statusClosing, err := s.getApprovalStatuses(c.Context(), projectFlockID)
	if err != nil {
		s.Log.Errorf("Failed to retrieve approval statuses for project flock %d: %+v", projectFlockID, err)
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch approval status")
	}

	summary := dto.ToClosingSummaryDTO(*project, statusProject, statusClosing)

	return &summary, nil
}

func (s closingService) GetClosingSapronak(c *fiber.Ctx, projectFlockID uint, params *validation.ClosingSapronakQuery) ([]dto.ClosingSapronakItemDTO, int64, error) {
	if projectFlockID == 0 {
		return nil, 0, fiber.NewError(fiber.StatusBadRequest, "Invalid project flock id")
	}

	if params == nil {
		params = &validation.ClosingSapronakQuery{}
	}

	if params.Page == 0 {
		params.Page = 1
	}
	if params.Limit == 0 {
		params.Limit = 10
	}

	if err := s.Validate.Struct(params); err != nil {
		return nil, 0, fiber.NewError(fiber.StatusBadRequest, err.Error())
	}

	if params.Type != validation.SapronakTypeIncoming && params.Type != validation.SapronakTypeOutgoing {
		return nil, 0, fiber.NewError(fiber.StatusBadRequest, "type must be either incoming or outgoing")
	}

	if _, err := s.Repository.GetByID(c.Context(), projectFlockID, nil); err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return nil, 0, fiber.NewError(fiber.StatusNotFound, "Project flock tidak ditemukan")
		}
		s.Log.Errorf("Failed get project flock %d for sapronak closing: %+v", projectFlockID, err)
		return nil, 0, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch project flock")
	}

	warehouseIDs, err := s.getWarehouseIDsByProjectFlock(c.Context(), projectFlockID)
	if err != nil {
		s.Log.Errorf("Failed to fetch warehouses for project flock %d: %+v", projectFlockID, err)
		return nil, 0, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch warehouses for project flock")
	}

	var projectFlockKandangIDs []uint
	if params.Type == validation.SapronakTypeOutgoing {
		projectFlockKandangIDs, err = s.getProjectFlockKandangIDs(c.Context(), projectFlockID)
		if err != nil {
			s.Log.Errorf("Failed to fetch project flock kandang IDs for project flock %d: %+v", projectFlockID, err)
			return nil, 0, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch project flock kandang")
		}
	}

	offset := (params.Page - 1) * params.Limit
	rows, totalResults, err := s.Repository.GetSapronak(c.Context(), repository.SapronakQueryParams{
		Type:                   params.Type,
		WarehouseIDs:           warehouseIDs,
		ProjectFlockKandangIDs: projectFlockKandangIDs,
		Limit:                  params.Limit,
		Offset:                 offset,
	})
	if err != nil {
		s.Log.Errorf("Failed to fetch sapronak %s for project flock %d: %+v", params.Type, projectFlockID, err)
		return nil, 0, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch sapronak data")
	}

	items := make([]dto.ClosingSapronakItemDTO, 0, len(rows))
	for _, row := range rows {
		dateStr := row.DateText
		if dateStr == "" && !row.SortDate.IsZero() {
			dateStr = row.SortDate.Format("02-Jan-2006")
		}
		items = append(items, dto.ClosingSapronakItemDTO{
			Id:                   row.Id,
			Date:                 dateStr,
			ReferenceNumber:      row.ReferenceNumber,
			TransactionType:      row.TransactionType,
			ProductName:          row.ProductName,
			ProductCategory:      row.ProductCategory,
			ProductSubCategory:   row.ProductSubCategory,
			SourceWarehouse:      row.SourceWarehouse,
			DestinationWarehouse: row.DestinationWarehouse,
			// Destination:          row.Destination,
			Quantity:          row.Quantity,
			Unit:              row.Unit,
			FormattedQuantity: formatQuantity(row.Quantity, row.Unit),
			Notes:             row.Notes,
			SortDate:          row.SortDate,
		})
	}

	return items, totalResults, nil
}

func (s closingService) getWarehouseIDsByProjectFlock(ctx context.Context, projectFlockID uint) ([]uint, error) {
	var kandangIDs []uint
	db := s.Repository.DB().WithContext(ctx)

	if err := db.Model(&entity.ProjectFlockKandang{}).
		Where("project_flock_id = ?", projectFlockID).
		Pluck("kandang_id", &kandangIDs).Error; err != nil {
		return nil, err
	}

	if len(kandangIDs) == 0 {
		return []uint{}, nil
	}

	var warehouses []entity.Warehouse
	if err := db.Where("kandang_id IN ?", kandangIDs).Find(&warehouses).Error; err != nil {
		return nil, err
	}

	unique := make(map[uint]struct{})
	for _, warehouse := range warehouses {
		unique[warehouse.Id] = struct{}{}
	}

	ids := make([]uint, 0, len(unique))
	for id := range unique {
		ids = append(ids, id)
	}

	return ids, nil
}

func (s closingService) getProjectFlockKandangIDs(ctx context.Context, projectFlockID uint) ([]uint, error) {
	var ids []uint
	err := s.Repository.DB().WithContext(ctx).
		Model(&entity.ProjectFlockKandang{}).
		Where("project_flock_id = ?", projectFlockID).
		Pluck("id", &ids).Error
	if err != nil {
		return nil, err
	}

	return ids, nil
}

func formatQuantity(qty float64, uom string) string {
	qtyStr := strconv.FormatFloat(qty, 'f', -1, 64)
	if uom == "" {
		return qtyStr
	}
	return qtyStr + " " + uom
}

func (s closingService) getApprovalStatuses(ctx context.Context, projectFlockID uint) (string, string, error) {
	if s.ApprovalSvc == nil {
		return "", "Belum Selesai", nil
	}

	records, _, err := s.ApprovalSvc.List(ctx, utils.ApprovalWorkflowProjectFlock.String(), &projectFlockID, 1, 1000, "")
	if err != nil {
		return "", "", err
	}

	var (
		minStep        uint16
		statusProject  string
		completed      int
		latestActionAt time.Time
	)

	for _, rec := range records {
		if minStep == 0 || rec.StepNumber < minStep {
			minStep = rec.StepNumber
		}

		if latestActionAt.IsZero() || rec.ActionAt.After(latestActionAt) {
			latestActionAt = rec.ActionAt
			statusProject = rec.StepName
		}
	}

	if statusProject == "" && minStep > 0 {
		if label, ok := approvalutils.ApprovalStepName(utils.ApprovalWorkflowProjectFlock, approvalutils.ApprovalStep(minStep)); ok {
			statusProject = label
		}
	}

	statusClosing := "Belum Selesai"
	switch {
	case len(records) == 0 || completed == 0:
		statusClosing = "Belum Selesai"
	case completed < len(records):
		statusClosing = "Sebagian"
	default:
		statusClosing = "Selesai"
	}

	return statusProject, statusClosing, nil
}

func (s closingService) GetOverhead(c *fiber.Ctx, projectFlockID uint, projectFlockKandangID *uint) (*dto.OverheadListDTO, error) {
	budgets, err := s.ProjectBudgetRepo.GetByProjectFlockID(c.Context(), projectFlockID)
	if err != nil {
		return nil, err
	}

	realizations, err := s.ExpenseRealizationRepo.GetClosingOverhead(c.Context(), projectFlockID, projectFlockKandangID)
	if err != nil {
		return nil, err
	}

	projectFlockKandangs, err := s.ProjectFlockKandangRepo.GetByProjectFlockID(c.Context(), projectFlockID)
	if err != nil {
		return nil, err
	}
	totalKandangCount := len(projectFlockKandangs)

	// Build kandang count map for farm expense division
	projectFlockKandangCountMap := make(map[uint]int)
	projectFlockKandangCountMap[projectFlockID] = totalKandangCount

	involvedProjectFlocks := make(map[uint]bool)
	for _, realization := range realizations {
		if realization.ExpenseNonstock != nil &&
			realization.ExpenseNonstock.Expense != nil &&
			realization.ExpenseNonstock.Expense.ProjectFlockId != nil {
			var projectFlockIDs []uint
			if err := json.Unmarshal([]byte(*realization.ExpenseNonstock.Expense.ProjectFlockId), &projectFlockIDs); err == nil {
				for _, pfID := range projectFlockIDs {
					if pfID != projectFlockID {
						involvedProjectFlocks[pfID] = true
					}
				}
			}
		}
	}

	for pfID := range involvedProjectFlocks {
		if pfKandangs, err := s.ProjectFlockKandangRepo.GetByProjectFlockID(c.Context(), pfID); err == nil {
			projectFlockKandangCountMap[pfID] = len(pfKandangs)
		}
	}

	chickins, err := s.ChickinRepo.GetByProjectFlockID(c.Context(), projectFlockID)
	if err != nil {
		return nil, err
	}

	var totalChickinQty float64
	var totalDepletion float64

	if projectFlockKandangID != nil {
		for _, chickin := range chickins {
			if chickin.ProjectFlockKandangId == *projectFlockKandangID {
				totalChickinQty += chickin.UsageQty
			}
		}

		var depletionResult float64
		err = s.RecordingRepo.DB().WithContext(c.Context()).
			Table("recording_depletions").
			Select("COALESCE(SUM(recording_depletions.qty), 0)").
			Joins("JOIN recordings ON recordings.id = recording_depletions.recording_id").
			Where("recordings.project_flock_kandangs_id = ?", *projectFlockKandangID).
			Scan(&depletionResult).Error
		if err != nil {
			s.Log.Warnf("GetTotalDepletionByProjectFlockKandangID error: %v", err)
		} else {
			totalDepletion = depletionResult
		}
	} else {
		for _, chickin := range chickins {
			totalChickinQty += chickin.UsageQty
		}

		totalDepletion, err = s.RecordingRepo.GetTotalDepletionByProjectFlockID(c.Context(), projectFlockID)
		if err != nil {
			s.Log.Warnf("GetTotalDepletionByProjectFlockID error: %v", err)
		}
	}

	totalActualPopulation := totalChickinQty - totalDepletion

	result := dto.ToOverheadListDTOs(budgets, realizations, totalChickinQty, totalActualPopulation, projectFlockKandangID != nil, totalKandangCount, projectFlockKandangCountMap)

	return &result, nil
}

func (s closingService) GetClosingKeuangan(c *fiber.Ctx, projectFlockID uint) (*dto.ReportResponse, error) {

	if err := commonSvc.EnsureRelations(c.Context(),
		commonSvc.RelationCheck{Name: "Project Flock", ID: &projectFlockID, Exists: s.ProjectFlockRepo.IdExists},
	); err != nil {
		return nil, err
	}

	projectFlock, err := s.ProjectFlockRepo.GetByID(c.Context(), projectFlockID, nil)
	if err != nil {
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch project flock")
	}

	budgets, err := s.ProjectBudgetRepo.GetByProjectFlockID(c.Context(), projectFlockID)
	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch budgets")
	}

	actualUsageRows, err := s.Repository.GetActualUsageCostByProjectFlockID(c.Context(), projectFlockID)
	if err != nil {
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch actual usage cost")
	}

	purchaseItems := s.convertActualUsageToPurchaseItems(c.Context(), actualUsageRows)

	realizations, err := s.ExpenseRealizationRepo.GetByProjectFlockID(c.Context(), projectFlockID)
	if err != nil {
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch realizations")
	}

	deliveryProducts, err := s.MarketingDeliveryProductRepo.GetDeliveryProductsByProjectFlockID(c.Context(), projectFlockID, func(db *gorm.DB) *gorm.DB {
		return db.Preload("MarketingProduct").
			Preload("MarketingProduct.ProductWarehouse").
			Preload("MarketingProduct.ProductWarehouse.Product")
	})
	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch delivery products")
	}

	chickins, err := s.ChickinRepo.GetByProjectFlockID(c.Context(), projectFlockID)
	if err != nil {
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch chickins")
	}

	totalWeightProduced, _, err := s.RecordingRepo.GetProductionWeightAndQtyByProjectFlockID(c.Context(), projectFlockID)
	if err != nil {
		s.Log.Warnf("GetProductionWeightAndQtyByProjectFlockID error: %v", err)
	}

	totalEggWeightKg, err := s.RecordingRepo.GetTotalEggProductionWeightByProjectFlockID(c.Context(), projectFlockID)
	if err != nil {
		s.Log.Warnf("GetTotalEggProductionWeightByProjectFlockID error: %v", err)
	}

	totalDepletion, err := s.RecordingRepo.GetTotalDepletionByProjectFlockID(c.Context(), projectFlockID)
	if err != nil {
		s.Log.Warnf("GetTotalDepletionByProjectFlockID error: %v", err)
	}

	input := dto.ClosingKeuanganInput{
		ProjectFlockCategory: projectFlock.Category,
		PurchaseItems:        purchaseItems,
		Budgets:              budgets,
		Realizations:         realizations,
		DeliveryProducts:     deliveryProducts,
		Chickins:             chickins,
		TotalWeightProduced:  totalWeightProduced,
		TotalEggWeightKg:     totalEggWeightKg,
		TotalDepletion:       totalDepletion,
	}

	report := dto.ToClosingKeuanganReport(input)

	return &report, nil
}

func (s closingService) GetExpeditionHPP(c *fiber.Ctx, projectFlockID uint, projectFlockKandangID *uint) (*dto.ExpeditionHPPDTO, error) {
	if projectFlockID == 0 {
		return nil, fiber.NewError(fiber.StatusBadRequest, "Invalid project flock id")
	}

	rows, err := s.Repository.GetExpeditionHPP(c.Context(), projectFlockID, projectFlockKandangID)
	if err != nil {
		s.Log.Errorf("Failed to get expedition HPP for project flock %d: %+v", projectFlockID, err)
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch expedition HPP")
	}

	expeditionCosts := make([]dto.ExpeditionCostItemDTO, 0, len(rows))
	var totalHPP float64

	for idx, row := range rows {
		expeditionCosts = append(expeditionCosts, dto.ExpeditionCostItemDTO{
			Id:                   uint64(idx + 1),
			ExpeditionVendorName: row.SupplierName,
			HPPAmount:            row.TotalAmount,
		})

		totalHPP += row.TotalAmount
	}

	result := &dto.ExpeditionHPPDTO{
		ExpeditionCosts: expeditionCosts,
		TotalHPPAmount:  totalHPP,
	}

	return result, nil
}

func (s closingService) GetClosingDataProduksi(c *fiber.Ctx, projectFlockID uint) (*dto.ClosingProductionReportDTO, error) {
	if projectFlockID == 0 {
		return nil, fiber.NewError(fiber.StatusBadRequest, "Invalid project flock id")
	}

	project, err := s.Repository.GetByID(c.Context(), projectFlockID, s.withClosingRelations)
	if errors.Is(err, gorm.ErrRecordNotFound) {
		return nil, fiber.NewError(fiber.StatusNotFound, "Project flock not found")
	}
	if err != nil {
		s.Log.Errorf("Failed get project flock %d for closing data produksi: %+v", projectFlockID, err)
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch project flock")
	}

	var population float64
	for _, history := range project.KandangHistory {
		for _, chickin := range history.Chickins {
			population += chickin.UsageQty
		}
	}

	isGrowing := strings.EqualFold(project.Category, string(utils.ProjectFlockCategoryGrowing))

	projectFlockKandangIDs, err := s.getProjectFlockKandangIDs(c.Context(), projectFlockID)
	if err != nil {
		s.Log.Errorf("Failed to fetch project flock kandangs for %d: %+v", projectFlockID, err)
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch project flock kandangs")
	}

	feedIn, feedUsed, err := s.Repository.SumFeedPurchaseAndUsedByProjectFlockKandangIDs(c.Context(), projectFlockKandangIDs)
	if err != nil {
		s.Log.Errorf("Failed to sum feed purchase/used qty for project flock %d: %+v", projectFlockID, err)
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch feed purchase data")
	}

	claimCulling, err := s.Repository.SumClaimCullingByProjectFlockKandangIDs(c.Context(), projectFlockKandangIDs)
	if err != nil {
		s.Log.Errorf("Failed to sum claim culling for project flock %d: %+v", projectFlockID, err)
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch claim culling data")
	}

	finalPopulation := population - claimCulling

	var standards []entity.FcrStandard
	if project.FcrId > 0 {
		standards, err = s.Repository.GetFcrStandardsByFcrID(c.Context(), project.FcrId)
		if err != nil {
			s.Log.Errorf("Failed to fetch FCR standards for project flock %d: %+v", projectFlockID, err)
			return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch FCR standard data")
		}
	}
	age, err := s.calculateAverageSalesAge(c.Context(), projectFlockID)
	if err != nil {
		s.Log.Errorf("Failed to calculate sales age for project flock %d: %+v", projectFlockID, err)
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch sales age data")
	}

	feedUsedPerHead := 0.0
	if population > 0 {
		feedUsedPerHead = feedUsed / population
	}

	purchase := dto.ClosingPurchaseDTO{
		InitialPopulation: int(population),
		ClaimCulling:      int(claimCulling),
		FinalPopulation:   int(finalPopulation),
		FeedIn:            feedIn,
		FeedUsed:          feedUsed,
		FeedUsedPerHead:   feedUsedPerHead,
	}

	chickenFlagNames := []string{string(utils.FlagPullet)}
	chickenSalesWeight, chickenSalesQty, chickenSalesPrice, err := s.Repository.SumMarketingWeightAndQtyByProjectFlockKandangIDsAndFlagNames(c.Context(), projectFlockKandangIDs, chickenFlagNames)
	if err != nil {
		s.Log.Errorf("Failed to fetch chicken sales data for project flock %d: %+v", projectFlockID, err)
		return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch chicken sales data")
	}

	var chickenAverageWeight float64
	if chickenSalesQty > 0 {
		chickenAverageWeight = chickenSalesWeight / chickenSalesQty
	}

	var chickenAverageSellingPrice float64
	if chickenSalesWeight > 0 {
		chickenAverageSellingPrice = chickenSalesPrice / chickenSalesWeight
	}

	chickenSales := dto.ClosingSalesDTO{
		SalesPopulation:     int(chickenSalesQty),
		SalesWeight:         chickenSalesWeight,
		AverageWeight:       chickenAverageWeight,
		AverageSellingPrice: chickenAverageSellingPrice,
	}

	chickenDepletion := population - chickenSalesQty
	if chickenDepletion < 0 {
		chickenDepletion = 0
	}

	chickenPerformance := calculatePerformanceMetrics(chickenAverageWeight, chickenSalesWeight, feedUsed, population, chickenDepletion, age, standards)

	var eggSales *dto.ClosingEggSalesDTO
	var eggPerformance *dto.ClosingPerformanceDTO
	if !isGrowing {
		eggFlagNames := []string{
			string(utils.FlagTelur),
			string(utils.FlagTelurUtuh),
			string(utils.FlagTelurPecah),
			string(utils.FlagTelurPutih),
			string(utils.FlagTelurRetak),
		}

		eggSalesWeight, eggSalesQty, eggSalesPrice, err := s.Repository.SumMarketingWeightAndQtyByProjectFlockKandangIDsAndFlagNames(c.Context(), projectFlockKandangIDs, eggFlagNames)
		if err != nil {
			s.Log.Errorf("Failed to fetch egg sales data for project flock %d: %+v", projectFlockID, err)
			return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch egg sales data")
		}

		var averageEggWeight float64
		if eggSalesQty > 0 {
			averageEggWeight = eggSalesWeight / eggSalesQty
		}

		var averageEggSellingPrice float64
		if eggSalesWeight > 0 {
			averageEggSellingPrice = eggSalesPrice / eggSalesWeight
		}

		eggSales = &dto.ClosingEggSalesDTO{
			EggPieces:           int(eggSalesQty),
			EggMassKg:           eggSalesWeight,
			AverageEggWeightKg:  averageEggWeight,
			AverageSellingPrice: averageEggSellingPrice,
		}

		harvestEggQty, err := s.Repository.SumRecordingEggQtyByProjectFlockKandangIDsAndFlagNames(c.Context(), projectFlockKandangIDs, eggFlagNames)
		if err != nil {
			s.Log.Errorf("Failed to fetch recording egg qty for project flock %d: %+v", projectFlockID, err)
			return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to fetch egg harvest data")
		}

		eggDepletion := harvestEggQty - eggSalesQty
		if eggDepletion < 0 {
			eggDepletion = 0
		}

		eggPerf := calculatePerformanceMetrics(averageEggWeight, eggSalesWeight, feedUsed, harvestEggQty, eggDepletion, age, standards)
		eggPerformance = &eggPerf
	}

	sales := dto.ClosingSalesGroupDTO{
		Chicken: chickenSales,
		Egg:     eggSales,
	}

	performance := dto.ClosingPerformanceDTO{
		Depletion:     chickenPerformance.Depletion,
		Age:           age,
		MortalityStd:  chickenPerformance.MortalityStd,
		MortalityAct:  chickenPerformance.MortalityAct,
		DeffMortality: chickenPerformance.DeffMortality,
	}
	if eggPerformance != nil {
		performance.FcrStd = eggPerformance.FcrStd
		performance.FcrAct = eggPerformance.FcrAct
		performance.DeffFcr = eggPerformance.DeffFcr
		performance.Awg = eggPerformance.Awg
	} else {
		performance.FcrStd = chickenPerformance.FcrStd
		performance.FcrAct = chickenPerformance.FcrAct
		performance.DeffFcr = chickenPerformance.DeffFcr
		performance.Awg = chickenPerformance.Awg
	}

	result := dto.ClosingProductionReportDTO{
		Purchase:    purchase,
		Sales:       sales,
		Performance: performance,
	}

	return &result, nil
}

func (s closingService) calculateAverageSalesAge(ctx context.Context, projectFlockID uint) (float64, error) {
	deliveryProducts, err := s.MarketingDeliveryProductRepo.GetDeliveryProductsByProjectFlockID(ctx, projectFlockID, func(db *gorm.DB) *gorm.DB {
		return db.
			Preload("MarketingProduct").
			Preload("MarketingProduct.ProductWarehouse").
			Preload("MarketingProduct.ProductWarehouse.ProjectFlockKandang").
			Preload("MarketingProduct.ProductWarehouse.ProjectFlockKandang.Chickins")
	})
	if err != nil {
		return 0, err
	}

	var (
		totalQty      float64
		totalAgeWeeks float64
	)

	for _, product := range deliveryProducts {
		if product.UsageQty == 0 {
			continue
		}
		projectFlockKandang := product.MarketingProduct.ProductWarehouse.ProjectFlockKandang
		ageWeeks := dto.CalculateAgeFromChickinDataProduksi(projectFlockKandang, product.DeliveryDate)
		totalAgeWeeks += float64(ageWeeks) * product.UsageQty
		totalQty += product.UsageQty
	}

	if totalQty == 0 {
		return 0, nil
	}

	return totalAgeWeeks / totalQty, nil
}

func calculatePerformanceMetrics(averageWeight, totalWeight, feedUsed, basePopulation, depletion, age float64, standards []entity.FcrStandard) dto.ClosingPerformanceDTO {
	mortalityStd, fcrStd := closestFcrValues(standards, averageWeight)

	fcrAct := 0.0
	if totalWeight > 0 {
		fcrAct = feedUsed / totalWeight
	}

	mortalityAct := 0.0
	if basePopulation > 0 {
		mortalityAct = (depletion / basePopulation) * 100
	}

	deffMortality := mortalityAct - mortalityStd
	deffFcr := fcrAct - fcrStd

	awg := 0.0
	if age > 0 {
		awg = averageWeight / age
	}

	return dto.ClosingPerformanceDTO{
		Depletion:     depletion,
		Age:           age,
		MortalityStd:  mortalityStd,
		MortalityAct:  mortalityAct,
		DeffMortality: deffMortality,
		FcrStd:        fcrStd,
		FcrAct:        fcrAct,
		DeffFcr:       deffFcr,
		Awg:           awg,
	}
}

func closestFcrValues(standards []entity.FcrStandard, averageWeight float64) (float64, float64) {
	if len(standards) == 0 || averageWeight <= 0 {
		return 0, 0
	}

	closest := standards[0]
	minDiff := math.Abs(closest.Weight - averageWeight)
	for _, std := range standards[1:] {
		diff := math.Abs(std.Weight - averageWeight)
		if diff < minDiff {
			minDiff = diff
			closest = std
		}
	}

	return closest.Mortality, closest.FcrNumber
}

func (s closingService) convertActualUsageToPurchaseItems(ctx context.Context, actualUsageRows []repository.ActualUsageCostRow) []entity.PurchaseItem {
	if len(actualUsageRows) == 0 {
		return []entity.PurchaseItem{}
	}

	// Collect all product IDs
	productIDs := make([]uint, len(actualUsageRows))
	for i, row := range actualUsageRows {
		productIDs[i] = row.ProductID
	}

	// Fetch products with flags from repository
	products, err := s.Repository.GetProductsWithFlagsByIDs(ctx, productIDs)
	if err != nil {
		s.Log.Warnf("Failed to fetch products for actual usage: %v", err)
		products = []entity.Product{}
	}

	// Create product map
	productMap := make(map[uint]*entity.Product)
	for i := range products {
		productMap[products[i].Id] = &products[i]
	}

	// Convert to pseudo purchase items
	purchaseItems := make([]entity.PurchaseItem, 0, len(actualUsageRows))
	for _, row := range actualUsageRows {
		product := productMap[row.ProductID]

		// Skip if product not found
		if product == nil {
			s.Log.Warnf("Product ID %d not found for actual usage", row.ProductID)
			continue
		}

		purchaseItem := entity.PurchaseItem{
			Id:         0, // Pseudo item, no ID
			ProductId:  row.ProductID,
			TotalQty:   row.TotalQty,
			TotalPrice: row.TotalPrice,
			Price:      row.AveragePrice,
			Product:    product,
		}

		purchaseItems = append(purchaseItems, purchaseItem)
	}

	return purchaseItems
}