package service

import (
	"context"
	"log"
	"math"
	"time"

	commonRepo "gitlab.com/mbugroup/lti-api.git/internal/common/repository"
)

type HppService interface {
	CalculateHppCost(projectFlockKandangId uint, date *time.Time) (*HppCostResponse, error)
	GetTotalDepresiasiFlockGrowing(sourceProjectFlockID uint, date *time.Time) (float64, error)
	GetTotalProductionCost(projectFlockKandangId uint, endDate *time.Time, depresiasiTransfer float64) (float64, error)
	GetBudgetKandangLaying(projectFlockKandangId uint, endDate *time.Time) (float64, error)
	GetDepresiasiTransfer(projectFlockKandangId uint, date *time.Time) (float64, error)
	GetHppEstimationDanRealisasi(totalProductionCost float64, projectFlockKandangId uint, startDate *time.Time, endDate *time.Time) (*HppCostResponse, error)
}

type HppCostResponse struct {
	Estimation HppCostDetail `json:"estimation"`
	Real       HppCostDetail `json:"real"`
}

type HppCostDetail struct {
	HargaKg    float64 `json:"harga_kg"`
	HargaButir float64 `json:"harga_butir"`
	Total      float64 `json:"total"`
	Kg         float64 `json:"kg"`
	Butir      float64 `json:"butir"`
}

type hppService struct {
	hppRepo commonRepo.HppCostRepository
}

func NewHppService(hppRepo commonRepo.HppCostRepository) HppService {
	return &hppService{hppRepo: hppRepo}
}

func (s *hppService) CalculateHppCost(projectFlockKandangId uint, date *time.Time) (*HppCostResponse, error) {
	logHpp("CalculateHppCost", "start project_flock_kandang_id=%d input_date=%s", projectFlockKandangId, formatTimePtr(date))
	if date == nil {
		now := time.Now()
		date = &now
	}
	logHpp("CalculateHppCost", "normalized_date=%s", formatTimePtr(date))

	location, err := time.LoadLocation("Asia/Jakarta")
	if err != nil {
		logHpp("CalculateHppCost", "load_location_error=%v", err)
		return nil, err
	}
	logHpp("CalculateHppCost", "location=%s", location.String())

	startOfDay := time.Date(date.Year(), date.Month(), date.Day(), 0, 0, 0, 0, location)
	endOfDay := startOfDay.Add(24 * time.Hour)
	logHpp("CalculateHppCost", "start_of_day=%s end_of_day=%s", startOfDay.Format(time.RFC3339), endOfDay.Format(time.RFC3339))

	depresiasiTransfer, err := s.GetDepresiasiTransfer(projectFlockKandangId, &endOfDay)
	if err != nil {
		logHpp("CalculateHppCost", "get_depresiasi_transfer_error=%v", err)
		return nil, err
	}
	logHpp("CalculateHppCost", "depresiasi_transfer=%f", depresiasiTransfer)

	totalProductionCost, err := s.GetTotalProductionCost(projectFlockKandangId, &endOfDay, depresiasiTransfer)
	if err != nil {
		logHpp("CalculateHppCost", "get_total_production_cost_error=%v", err)
		return nil, err
	}
	logHpp("CalculateHppCost", "total_production_cost=%f", totalProductionCost)
	result, err := s.GetHppEstimationDanRealisasi(totalProductionCost, projectFlockKandangId, &startOfDay, &endOfDay)
	if err != nil {
		logHpp("CalculateHppCost", "get_hpp_estimation_dan_realisasi_error=%v", err)
		return nil, err
	}
	logHpp("CalculateHppCost", "done estimation=%+v real=%+v", result.Estimation, result.Real)
	return result, nil
}

func (s *hppService) GetTotalDepresiasiFlockGrowing(sourceProjectFlockID uint, date *time.Time) (float64, error) {
	logHpp("GetTotalDepresiasiFlockGrowing", "start source_project_flock_id=%d input_date=%s", sourceProjectFlockID, formatTimePtr(date))
	if date == nil {
		now := time.Now()
		date = &now
	}
	logHpp("GetTotalDepresiasiFlockGrowing", "normalized_date=%s", formatTimePtr(date))

	if s.hppRepo == nil {
		logHpp("GetTotalDepresiasiFlockGrowing", "repo_nil return=0")
		return 0, nil
	}

	kandangIDs, err := s.hppRepo.GetProjectFlockKandangIDs(context.Background(), sourceProjectFlockID)
	if err != nil {
		logHpp("GetTotalDepresiasiFlockGrowing", "get_project_flock_kandang_ids_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalDepresiasiFlockGrowing", "kandang_ids=%v", kandangIDs)

	docCost, err := s.hppRepo.GetDocCost(context.Background(), kandangIDs)
	if err != nil {
		logHpp("GetTotalDepresiasiFlockGrowing", "get_doc_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalDepresiasiFlockGrowing", "doc_cost=%f", docCost)

	budgetCost, err := s.hppRepo.GetBudgetCostByProjectFlockId(context.Background(), sourceProjectFlockID)
	if err != nil {
		logHpp("GetTotalDepresiasiFlockGrowing", "get_budget_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalDepresiasiFlockGrowing", "budget_cost=%f", budgetCost)

	expedisionCost, err := s.hppRepo.GetExpedisionCost(context.Background(), kandangIDs)
	if err != nil {
		logHpp("GetTotalDepresiasiFlockGrowing", "get_expedision_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalDepresiasiFlockGrowing", "expedision_cost=%f", expedisionCost)

	feedCost, err := s.hppRepo.GetFeedUsageCost(context.Background(), kandangIDs, date)
	if err != nil {
		logHpp("GetTotalDepresiasiFlockGrowing", "get_feed_usage_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalDepresiasiFlockGrowing", "feed_cost=%f", feedCost)

	ovkCost, err := s.hppRepo.GetOvkUsageCost(context.Background(), kandangIDs, date)
	if err != nil {
		logHpp("GetTotalDepresiasiFlockGrowing", "get_ovk_usage_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalDepresiasiFlockGrowing", "ovk_cost=%f", ovkCost)

	total := docCost + budgetCost + expedisionCost + feedCost + ovkCost
	logHpp("GetTotalDepresiasiFlockGrowing", "done total=%f", total)
	return total, nil
}

func (s *hppService) GetTotalProductionCost(projectFlockKandangId uint, endDate *time.Time, depresiasiTransfer float64) (float64, error) {
	logHpp("GetTotalProductionCost", "start project_flock_kandang_id=%d end_date=%s depresiasi_transfer=%f", projectFlockKandangId, formatTimePtr(endDate), depresiasiTransfer)
	// if date == nil {
	// 	now := time.Now()
	// 	date = &now
	// }

	costPullet, err := s.hppRepo.GetPulletCost(context.Background(), projectFlockKandangId)
	if err != nil {
		logHpp("GetTotalProductionCost", "get_pullet_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalProductionCost", "cost_pullet=%f", costPullet)

	costFeed, err := s.hppRepo.GetFeedUsageCost(context.Background(), []uint{projectFlockKandangId}, endDate)
	if err != nil {
		logHpp("GetTotalProductionCost", "get_feed_usage_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalProductionCost", "cost_feed=%f", costFeed)

	costOvk, err := s.hppRepo.GetOvkUsageCost(context.Background(), []uint{projectFlockKandangId}, endDate)
	if err != nil {
		logHpp("GetTotalProductionCost", "get_ovk_usage_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalProductionCost", "cost_ovk=%f", costOvk)

	costExpedision, err := s.hppRepo.GetExpedisionCost(context.Background(), []uint{projectFlockKandangId})
	if err != nil {
		logHpp("GetTotalProductionCost", "get_expedision_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalProductionCost", "cost_expedision=%f", costExpedision)

	costBudget, err := s.GetBudgetKandangLaying(projectFlockKandangId, endDate)
	if err != nil {
		logHpp("GetTotalProductionCost", "get_budget_kandang_laying_error=%v", err)
		return 0, err
	}
	logHpp("GetTotalProductionCost", "cost_budget=%f", costBudget)

	// fmt.Println(costBudget, costExpedision, costOvk, costFeed, costPullet, depresiasiTransfer)

	// depresiasiTransfer = 0

	total := depresiasiTransfer + costPullet + costFeed + costOvk + costExpedision + costBudget
	logHpp("GetTotalProductionCost", "done total=%f", total)
	return total, nil
}

func (s *hppService) GetBudgetKandangLaying(projectFlockKandangId uint, endDate *time.Time) (float64, error) {
	logHpp("GetBudgetKandangLaying", "start project_flock_kandang_id=%d end_date=%s", projectFlockKandangId, formatTimePtr(endDate))
	// if date == nil {
	// 	now := time.Now()
	// 	date = &now
	// }

	if s.hppRepo == nil {
		logHpp("GetBudgetKandangLaying", "repo_nil return=0")
		return 0, nil
	}

	projectFlockId, err := s.hppRepo.GetProjectFlockIDByProjectFlockKandangID(context.Background(), projectFlockKandangId)
	if err != nil {
		logHpp("GetBudgetKandangLaying", "get_project_flock_id_error=%v", err)
		return 0, err
	}
	logHpp("GetBudgetKandangLaying", "project_flock_id=%d", projectFlockId)

	projectFlockKandangIds, err := s.hppRepo.GetProjectFlockKandangIDs(context.Background(), projectFlockId)
	if err != nil {
		logHpp("GetBudgetKandangLaying", "get_project_flock_kandang_ids_error=%v", err)
		return 0, err
	}
	logHpp("GetBudgetKandangLaying", "project_flock_kandang_ids=%v", projectFlockKandangIds)

	eggProduksiPiecesFlock, _, err := s.hppRepo.GetEggProduksiPiecesAndWeightKgByProjectFlockKandangIds(context.Background(), projectFlockKandangIds, endDate)
	if err != nil {
		logHpp("GetBudgetKandangLaying", "get_egg_produksi_pieces_flock_error=%v", err)
		return 0, err
	}
	logHpp("GetBudgetKandangLaying", "egg_produksi_pieces_flock=%f", eggProduksiPiecesFlock)

	eggProduksiPiecesKandang, _, err := s.hppRepo.GetEggProduksiPiecesAndWeightKgByProjectFlockKandangIds(context.Background(), []uint{projectFlockKandangId}, endDate)
	if err != nil {
		logHpp("GetBudgetKandangLaying", "get_egg_produksi_pieces_kandang_error=%v", err)
		return 0, err
	}
	logHpp("GetBudgetKandangLaying", "egg_produksi_pieces_kandang=%f", eggProduksiPiecesKandang)

	totalBudgetCost, err := s.hppRepo.GetBudgetCostByProjectFlockId(context.Background(), projectFlockId)
	if err != nil {
		logHpp("GetBudgetKandangLaying", "get_budget_cost_error=%v", err)
		return 0, err
	}
	logHpp("GetBudgetKandangLaying", "total_budget_cost=%f", totalBudgetCost)

	if eggProduksiPiecesFlock == 0 {
		logHpp("GetBudgetKandangLaying", "egg_produksi_pieces_flock_zero return=0")
		return 0, nil
	}

	result := (totalBudgetCost * eggProduksiPiecesKandang) / eggProduksiPiecesFlock
	logHpp("GetBudgetKandangLaying", "done result=%f", result)
	return result, nil
}

func (s *hppService) GetDepresiasiTransfer(projectFlockKandangId uint, endDate *time.Time) (float64, error) {
	logHpp("GetDepresiasiTransfer", "start project_flock_kandang_id=%d end_date=%s", projectFlockKandangId, formatTimePtr(endDate))
	if endDate == nil {
		now := time.Now()
		endDate = &now
	}
	logHpp("GetDepresiasiTransfer", "normalized_end_date=%s", formatTimePtr(endDate))

	if s.hppRepo == nil {
		logHpp("GetDepresiasiTransfer", "repo_nil return=0")
		return 0, nil
	}

	sourceProjectFlockID, transferTotalQty, err := s.hppRepo.GetTransferSourceSummary(context.Background(), projectFlockKandangId)
	if err != nil {
		logHpp("GetDepresiasiTransfer", "get_transfer_source_summary_error=%v", err)
		return 0, err
	}
	logHpp("GetDepresiasiTransfer", "source_project_flock_id=%d transfer_total_qty=%f", sourceProjectFlockID, transferTotalQty)
	if sourceProjectFlockID == 0 || transferTotalQty <= 0 {
		logHpp("GetDepresiasiTransfer", "use_manual_fallback=true")
		result, fallbackErr := s.getManualDepresiasiTransferFallback(projectFlockKandangId)
		if fallbackErr != nil {
			logHpp("GetDepresiasiTransfer", "manual_fallback_error=%v", fallbackErr)
			return 0, fallbackErr
		}
		logHpp("GetDepresiasiTransfer", "done_fallback result=%f", result)
		return result, nil
	}

	kandangIDsGrowing, err := s.hppRepo.GetProjectFlockKandangIDs(context.Background(), sourceProjectFlockID)
	if err != nil {
		logHpp("GetDepresiasiTransfer", "get_project_flock_kandang_ids_error=%v", err)
		return 0, err
	}
	logHpp("GetDepresiasiTransfer", "kandang_ids_growing=%v", kandangIDsGrowing)

	totalPopulationFlockGrowing, err := s.hppRepo.GetTotalPopulation(context.Background(), kandangIDsGrowing)
	if err != nil {
		logHpp("GetDepresiasiTransfer", "get_total_population_error=%v", err)
		return 0, err
	}
	logHpp("GetDepresiasiTransfer", "total_population_flock_growing=%f", totalPopulationFlockGrowing)
	if totalPopulationFlockGrowing == 0 {
		logHpp("GetDepresiasiTransfer", "total_population_flock_growing_zero return=0")
		return 0, nil
	}

	totalDepresiasiFlockGrowing, err := s.GetTotalDepresiasiFlockGrowing(sourceProjectFlockID, endDate)
	if err != nil {
		logHpp("GetDepresiasiTransfer", "get_total_depresiasi_flock_growing_error=%v", err)
		return 0, err
	}
	logHpp("GetDepresiasiTransfer", "total_depresiasi_flock_growing=%f", totalDepresiasiFlockGrowing)

	result := (totalDepresiasiFlockGrowing * transferTotalQty) / totalPopulationFlockGrowing
	logHpp("GetDepresiasiTransfer", "done result=%f", result)
	return result, nil
}

func (s *hppService) getManualDepresiasiTransferFallback(projectFlockKandangId uint) (float64, error) {
	logHpp("getManualDepresiasiTransferFallback", "start project_flock_kandang_id=%d", projectFlockKandangId)
	projectFlockID, err := s.hppRepo.GetProjectFlockIDByProjectFlockKandangID(context.Background(), projectFlockKandangId)
	if err != nil {
		logHpp("getManualDepresiasiTransferFallback", "get_project_flock_id_error=%v", err)
		return 0, err
	}
	logHpp("getManualDepresiasiTransferFallback", "project_flock_id=%d", projectFlockID)
	if projectFlockID == 0 {
		logHpp("getManualDepresiasiTransferFallback", "project_flock_id_zero return=0")
		return 0, nil
	}

	manualCost, err := s.hppRepo.GetManualDepreciationCostByProjectFlockID(context.Background(), projectFlockID)
	if err != nil {
		logHpp("getManualDepresiasiTransferFallback", "get_manual_depreciation_cost_error=%v", err)
		return 0, err
	}
	logHpp("getManualDepresiasiTransferFallback", "manual_cost=%f", manualCost)
	if manualCost <= 0 {
		logHpp("getManualDepresiasiTransferFallback", "manual_cost_non_positive return=0")
		return 0, nil
	}

	kandangIDs, err := s.hppRepo.GetProjectFlockKandangIDs(context.Background(), projectFlockID)
	if err != nil {
		logHpp("getManualDepresiasiTransferFallback", "get_project_flock_kandang_ids_error=%v", err)
		return 0, err
	}
	logHpp("getManualDepresiasiTransferFallback", "kandang_ids=%v", kandangIDs)
	if len(kandangIDs) == 0 {
		logHpp("getManualDepresiasiTransferFallback", "kandang_ids_empty return=0")
		return 0, nil
	}

	totalUsageQty, err := s.hppRepo.GetTotalPopulation(context.Background(), kandangIDs)
	if err != nil {
		logHpp("getManualDepresiasiTransferFallback", "get_total_usage_qty_error=%v", err)
		return 0, err
	}
	logHpp("getManualDepresiasiTransferFallback", "total_usage_qty=%f", totalUsageQty)
	if totalUsageQty <= 0 {
		logHpp("getManualDepresiasiTransferFallback", "total_usage_qty_non_positive return=0")
		return 0, nil
	}

	kandangUsageQty, err := s.hppRepo.GetTotalPopulation(context.Background(), []uint{projectFlockKandangId})
	if err != nil {
		logHpp("getManualDepresiasiTransferFallback", "get_kandang_usage_qty_error=%v", err)
		return 0, err
	}
	logHpp("getManualDepresiasiTransferFallback", "kandang_usage_qty=%f", kandangUsageQty)
	if kandangUsageQty <= 0 {
		logHpp("getManualDepresiasiTransferFallback", "kandang_usage_qty_non_positive return=0")
		return 0, nil
	}

	result := manualCost * (kandangUsageQty / totalUsageQty)
	logHpp("getManualDepresiasiTransferFallback", "done result=%f", result)
	return result, nil
}

func (s *hppService) GetHppEstimationDanRealisasi(totalProductionCost float64, projectFlockKandangId uint, startDate *time.Time, endDate *time.Time) (*HppCostResponse, error) {
	logHpp("GetHppEstimationDanRealisasi", "start total_production_cost=%f project_flock_kandang_id=%d start_date=%s end_date=%s", totalProductionCost, projectFlockKandangId, formatTimePtr(startDate), formatTimePtr(endDate))

	if s.hppRepo == nil {
		logHpp("GetHppEstimationDanRealisasi", "repo_nil return_empty_response")
		return &HppCostResponse{}, nil
	}

	estimPieces, estimWeightKg, err := s.hppRepo.GetEggProduksiPiecesAndWeightKgByProjectFlockKandangIds(context.Background(), []uint{projectFlockKandangId}, endDate)
	if err != nil {
		logHpp("GetHppEstimationDanRealisasi", "get_egg_produksi_error=%v", err)
		return nil, err
	}
	logHpp("GetHppEstimationDanRealisasi", "estim_pieces=%f estim_weight_kg=%f", estimPieces, estimWeightKg)

	realPieces, realWeightKg, err := s.hppRepo.GetEggTerjualPiecesAndWeightKgByProjectFlockKandangIds(context.Background(), []uint{projectFlockKandangId}, startDate, endDate)
	if err != nil {
		logHpp("GetHppEstimationDanRealisasi", "get_egg_terjual_error=%v", err)
		return nil, err
	}
	logHpp("GetHppEstimationDanRealisasi", "real_pieces=%f real_weight_kg=%f", realPieces, realWeightKg)

	estimation := HppCostDetail{
		Total: totalProductionCost,
		Kg:    estimWeightKg,
		Butir: estimPieces,
	}
	if estimWeightKg > 0 {
		estimation.HargaKg = roundToTwoDecimals(totalProductionCost / estimWeightKg)
	}
	if estimPieces > 0 {
		estimation.HargaButir = roundToTwoDecimals(totalProductionCost / estimPieces)
	}
	logHpp("GetHppEstimationDanRealisasi", "estimation=%+v", estimation)

	real := HppCostDetail{
		Total: totalProductionCost,
		Kg:    realWeightKg,
		Butir: realPieces,
	}
	if realWeightKg > 0 {
		real.HargaKg = roundToTwoDecimals(totalProductionCost / realWeightKg)
	}
	if realPieces > 0 {
		real.HargaButir = roundToTwoDecimals(totalProductionCost / realPieces)
	}
	logHpp("GetHppEstimationDanRealisasi", "real=%+v", real)

	result := &HppCostResponse{
		Estimation: estimation,
		Real:       real,
	}
	logHpp("GetHppEstimationDanRealisasi", "done response=%+v", *result)
	return result, nil
}

func roundToTwoDecimals(value float64) float64 {
	result := math.Round(value*100) / 100
	logHpp("roundToTwoDecimals", "input=%f output=%f", value, result)
	return result
}

func formatTimePtr(value *time.Time) string {
	if value == nil {
		return "<nil>"
	}
	return value.Format(time.RFC3339)
}

func logHpp(method, format string, args ...any) {
	log.Printf("[HPP][%s] "+format, append([]any{method}, args...)...)
}