package dto

import (
	"fmt"
	"time"

	entity "gitlab.com/mbugroup/lti-api.git/internal/entities"
	customerDTO "gitlab.com/mbugroup/lti-api.git/internal/modules/master/customers/dto"
	productDTO "gitlab.com/mbugroup/lti-api.git/internal/modules/master/products/dto"
	warehouseDTO "gitlab.com/mbugroup/lti-api.git/internal/modules/master/warehouses/dto"
	userDTO "gitlab.com/mbugroup/lti-api.git/internal/modules/users/dto"
)

type RepportMarketingItemDTO struct {
	ID              int                                `json:"id"`
	SoDate          time.Time                          `json:"so_date"`
	RealizationDate time.Time                          `json:"realization_date"`
	AgingDays       int                                `json:"aging_days"`
	Warehouse       *warehouseDTO.WarehouseRelationDTO `json:"warehouse,omitempty"`
	Customer        *customerDTO.CustomerRelationDTO   `json:"customer,omitempty"`
	DoNumber        string                             `json:"do_number"`
	Sales           *userDTO.UserRelationDTO           `json:"sales,omitempty"`
	VehicleNumber   string                             `json:"vehicle_number"`
	Product         *productDTO.ProductRelationDTO     `json:"product,omitempty"`
	MarketingType   string                             `json:"marketing_type"`
	Qty             float64                            `json:"qty"`
	AverageWeightKg float64                            `json:"average_weight_kg"`
	TotalWeightKg   float64                            `json:"total_weight_kg"`
	SalesPricePerKg float64                            `json:"sales_price_per_kg"`
	HppPricePerKg   float64                            `json:"hpp_price_per_kg"`
	SalesAmount     float64                            `json:"sales_amount"`
	HppAmount       float64                            `json:"hpp_amount"`
}

type Summary struct {
	TotalQty           int     `json:"total_qty"`
	TotalWeightKg      float64 `json:"total_weight_kg"`
	TotalSalesAmount   int64   `json:"total_sales_amount"`
	TotalHppAmount     int64   `json:"total_hpp_amount"`
	TotalHppPricePerKg float64 `json:"total_hpp_price_per_kg"`
}

type RepportMarketingResponseDTO struct {
	Items []RepportMarketingItemDTO `json:"items"`
	Total *Summary                  `json:"total,omitempty"`
}

func ToRepportMarketingItemDTO(mdp entity.MarketingDeliveryProduct, hppPricePerKg float64) RepportMarketingItemDTO {
	soDate := time.Time{}
	agingDays := 0
	if mdp.MarketingProduct.Marketing.SoDate.Year() > 1 {
		soDate = mdp.MarketingProduct.Marketing.SoDate
		agingDays = int(time.Since(soDate).Hours() / 24)
	}

	realizationDate := time.Time{}
	if mdp.DeliveryDate != nil {
		realizationDate = *mdp.DeliveryDate
	}

	doNumber := generateDoNumber(mdp.MarketingProduct.Marketing.SoNumber, mdp.DeliveryDate, mdp.MarketingProduct.ProductWarehouse.WarehouseId)

	totalWeightKg := mdp.Qty * mdp.AvgWeight
	salesAmount := totalWeightKg * mdp.UnitPrice
	hppAmount := totalWeightKg * hppPricePerKg

	item := RepportMarketingItemDTO{
		ID:              int(mdp.Id),
		SoDate:          soDate,
		RealizationDate: realizationDate,
		AgingDays:       agingDays,
		DoNumber:        doNumber,
		MarketingType:   "ayam",
		Qty:             mdp.Qty,
		AverageWeightKg: mdp.AvgWeight,
		TotalWeightKg:   totalWeightKg,
		SalesPricePerKg: mdp.UnitPrice,
		HppPricePerKg:   hppPricePerKg,
		SalesAmount:     salesAmount,
		HppAmount:       hppAmount,
	}

	if mdp.MarketingProduct.ProductWarehouse.WarehouseId != 0 {
		mapped := warehouseDTO.ToWarehouseRelationDTO(mdp.MarketingProduct.ProductWarehouse.Warehouse)
		item.Warehouse = &mapped
	}

	if mdp.MarketingProduct.Marketing.CustomerId != 0 {
		mapped := customerDTO.ToCustomerRelationDTO(mdp.MarketingProduct.Marketing.Customer)
		item.Customer = &mapped
	}

	if mdp.MarketingProduct.Marketing.SalesPersonId != 0 {
		mapped := userDTO.ToUserRelationDTO(mdp.MarketingProduct.Marketing.SalesPerson)
		item.Sales = &mapped
	}

	item.VehicleNumber = mdp.VehicleNumber

	if mdp.MarketingProduct.ProductWarehouse.ProductId != 0 {
		mapped := productDTO.ToProductRelationDTO(mdp.MarketingProduct.ProductWarehouse.Product)
		item.Product = &mapped
	}

	return item
}

func ToRepportMarketingItemDTOs(mdps []entity.MarketingDeliveryProduct, hppPricePerKg float64) []RepportMarketingItemDTO {
	items := make([]RepportMarketingItemDTO, 0, len(mdps))
	for _, mdp := range mdps {
		items = append(items, ToRepportMarketingItemDTO(mdp, hppPricePerKg))
	}
	return items
}

func ToRepportMarketingItemDTOsWithHppMap(mdps []entity.MarketingDeliveryProduct, hppMap map[uint]float64) []RepportMarketingItemDTO {
	items := make([]RepportMarketingItemDTO, 0, len(mdps))
	for _, mdp := range mdps {
		hppPerKg := float64(0)
		if projectFlockKandang := mdp.MarketingProduct.ProductWarehouse.ProjectFlockKandang; projectFlockKandang != nil {
			if hpp, exists := hppMap[projectFlockKandang.ProjectFlockId]; exists {
				hppPerKg = hpp
			}
		}
		items = append(items, ToRepportMarketingItemDTO(mdp, hppPerKg))
	}
	return items
}

func ToSummary(mdps []entity.MarketingDeliveryProduct, hppPricePerKg float64) *Summary {
	if len(mdps) == 0 {
		return nil
	}

	totalQty := 0
	totalWeightKg := 0.0
	totalSalesAmount := int64(0)
	totalHppAmount := int64(0)

	for _, mdp := range mdps {
		calculatedTotalWeight := mdp.Qty * mdp.AvgWeight
		totalQty += int(mdp.Qty)
		totalWeightKg += calculatedTotalWeight
		totalSalesAmount += int64(calculatedTotalWeight * mdp.UnitPrice)
		totalHppAmount += int64(calculatedTotalWeight * hppPricePerKg)
	}

	totalHppPricePerKg := float64(0)
	if totalWeightKg > 0 {
		totalHppPricePerKg = float64(totalHppAmount) / totalWeightKg
	}

	return &Summary{
		TotalQty:           totalQty,
		TotalWeightKg:      totalWeightKg,
		TotalSalesAmount:   totalSalesAmount,
		TotalHppAmount:     totalHppAmount,
		TotalHppPricePerKg: totalHppPricePerKg,
	}
}

func generateDoNumber(soNumber string, deliveryDate *time.Time, warehouseId uint) string {
	dateStr := ""
	if deliveryDate != nil {
		dateStr = deliveryDate.Format("20060102")
	}
	return fmt.Sprintf("%s-%s-%d", soNumber, dateStr, warehouseId)
}

func ToSummaryFromDTOItems(items []RepportMarketingItemDTO) *Summary {
	if len(items) == 0 {
		return nil
	}

	totalQty := 0
	totalWeightKg := 0.0
	totalSalesAmount := int64(0)
	totalHppAmount := int64(0)

	for _, item := range items {
		totalQty += int(item.Qty)
		totalWeightKg += item.TotalWeightKg
		totalSalesAmount += int64(item.SalesAmount)
		totalHppAmount += int64(item.HppAmount)
	}

	totalHppPricePerKg := float64(0)
	if totalWeightKg > 0 {
		totalHppPricePerKg = float64(totalHppAmount) / totalWeightKg
	}

	return &Summary{
		TotalQty:           totalQty,
		TotalWeightKg:      totalWeightKg,
		TotalSalesAmount:   totalSalesAmount,
		TotalHppAmount:     totalHppAmount,
		TotalHppPricePerKg: totalHppPricePerKg,
	}
}

func ToRepportMarketingResponseDTO(mdps []entity.MarketingDeliveryProduct, hppPricePerKg float64) RepportMarketingResponseDTO {
	items := ToRepportMarketingItemDTOs(mdps, hppPricePerKg)
	total := ToSummary(mdps, hppPricePerKg)

	return RepportMarketingResponseDTO{
		Items: items,
		Total: total,
	}
}