package dto

import (
	"fmt"
	"time"

	entity "gitlab.com/mbugroup/lti-api.git/internal/entities"
	userDTO "gitlab.com/mbugroup/lti-api.git/internal/modules/users/dto"
)

// === DTO Structs ===

type ClosingRelationDTO struct {
	Id   uint   `json:"id"`
	Name string `json:"name"`
}

type ClosingListDTO struct {
	Id          uint                     `json:"id"`
	Name        string                   `json:"name"`
	CreatedUser *userDTO.UserRelationDTO `json:"created_user"`
	CreatedAt   time.Time                `json:"created_at"`
	UpdatedAt   time.Time                `json:"updated_at"`
}

type ClosingDetailDTO struct {
	ClosingListDTO
}

type ClosingSummaryDTO struct {
	LocationID                uint   `json:"location_id"`
	Periode                   int    `json:"periode"`
	JenisProduk               string `json:"jenis_produk"`
	LabelPopulasi             string `json:"label_populasi"`
	JumlahPopulasi            int    `json:"jumlah_populasi"`
	JumlahPopulasiFormatted   string `json:"jumlah_populasi_formatted"`
	JenisProject              string `json:"jenis_project"`
	KandangAktif              int    `json:"kandang_aktif"`
	KandangAktifFormatted     string `json:"kandang_aktif_formatted"`
	StatusPembayaranPenjualan string `json:"status_pembayaran_penjualan"`
	StatusPembayaranMitra     string `json:"status_pembayaran_mitra"`
	StatusProject             string `json:"status_project"`
	StatusClosing             string `json:"status_closing"`
}

func ToClosingSummaryDTO(project entity.ProjectFlock, statusProject, statusClosing string) ClosingSummaryDTO {
	history := project.KandangHistory

	period := maxPeriod(history)
	kandangCount := len(history)
	population := sumPopulation(history)
	populationInt := int(population)

	return ClosingSummaryDTO{
		LocationID:                project.LocationId,
		Periode:                   period,
		JenisProduk:               project.Category,
		LabelPopulasi:             "",
		JumlahPopulasi:            populationInt,
		JumlahPopulasiFormatted:   fmt.Sprintf("%d Ekor", populationInt),
		JenisProject:              "",
		KandangAktif:              kandangCount,
		KandangAktifFormatted:     fmt.Sprintf("%d Kandang", kandangCount),
		StatusPembayaranPenjualan: "Tempo",
		StatusPembayaranMitra:     "",
		StatusProject:             statusProject,
		StatusClosing:             statusClosing,
	}
}

func maxPeriod(history []entity.ProjectFlockKandang) int {
	max := 0
	for _, h := range history {
		if h.Period > max {
			max = h.Period
		}
	}
	return max
}

func sumPopulation(history []entity.ProjectFlockKandang) float64 {
	var total float64
	for _, h := range history {
		for _, chickin := range h.Chickins {
			total += chickin.UsageQty + chickin.PendingUsageQty
		}
	}
	return total
}

// === Mapper Functions ===

func ToClosingRelationDTO(e entity.ProjectFlock) ClosingRelationDTO {
	return ClosingRelationDTO{
		Id: e.Id,
	}
}

func ToClosingListDTO(e entity.ProjectFlock) ClosingListDTO {
	var createdUser *userDTO.UserRelationDTO
	if e.CreatedUser.Id != 0 {
		mapped := userDTO.ToUserRelationDTO(e.CreatedUser)
		createdUser = &mapped
	}

	return ClosingListDTO{
		Id:          e.Id,
		CreatedAt:   e.CreatedAt,
		UpdatedAt:   e.UpdatedAt,
		CreatedUser: createdUser,
	}
}

func ToClosingListDTOs(e []entity.ProjectFlock) []ClosingListDTO {
	result := make([]ClosingListDTO, len(e))
	for i, r := range e {
		result[i] = ToClosingListDTO(r)
	}
	return result
}

func ToClosingDetailDTO(e entity.ProjectFlock) ClosingDetailDTO {
	return ClosingDetailDTO{
		ClosingListDTO: ToClosingListDTO(e),
	}
}