package mapper

import (
	"encoding/json"
	"wm-backend/internal/models"
	db "wm-backend/sqlc_gen"

	"github.com/jackc/pgx/v5/pgtype"
)

func numericToString(n pgtype.Numeric) string {
	if !n.Valid {
		return ""
	}
	b, _ := json.Marshal(n)
	return string(b)
}

func stringToNumeric(s string) pgtype.Numeric {
	var n pgtype.Numeric
	if s == "" {
		return n
	}
	_ = json.Unmarshal([]byte(s), &n)
	return n
}

func ToDomainAlternativeComponent(r db.AlternativeComponent) *models.AlternativeComponent {
	return &models.AlternativeComponent{
		ID:                     r.ID,
		InvoiceConfigItemID:    r.InvoiceConfigItemID,
		AlternativeComponentID: r.AlternativeComponentID,
		ConversionRatio:        numericToString(r.ConversionRatio),
		Priority:               r.Priority,
		Note:                   r.Note.String,
		Metadata:               r.Metadata,
	}
}

func ToModelAlternativeComponent(r *models.AlternativeComponent) *db.CreateAlternativeComponentParams {
	return &db.CreateAlternativeComponentParams{
		InvoiceConfigItemID:    r.InvoiceConfigItemID,
		AlternativeComponentID: r.AlternativeComponentID,
		ConversionRatio:        stringToNumeric(r.ConversionRatio),
		Priority:               r.Priority,
		Note: pgtype.Text{
			String: r.Note,
			Valid:  r.Note != "",
		},
		Metadata: r.Metadata,
	}
}

func ToUpdateModelAlternativeComponent(r *models.AlternativeComponent) *db.UpdateAlternativeComponentParams {
	return &db.UpdateAlternativeComponentParams{
		InvoiceConfigItemID:    r.InvoiceConfigItemID,
		AlternativeComponentID: r.AlternativeComponentID,
		ConversionRatio:        stringToNumeric(r.ConversionRatio),
		Priority:               r.Priority,
		Note: pgtype.Text{
			String: r.Note,
			Valid:  r.Note != "",
		},
		Metadata: r.Metadata,
		ID:       r.ID,
	}
}