package service

import (
	"encoding/json"
	"fmt"

	"github.com/wmms/wmms/internal/model"
	"github.com/wmms/wmms/internal/repository"
)

type MaterialLogService struct {
	logRepo *repository.MaterialLogRepo
}

func NewMaterialLogService() *MaterialLogService {
	return &MaterialLogService{
		logRepo: repository.NewMaterialLogRepo(),
	}
}

func (s *MaterialLogService) LogCreate(material *model.Material, operator string) error {
	newValue, _ := json.Marshal(material)
	log := &model.MaterialLog{
		OperationType: "CREATE",
		MaterialID:    material.ID,
		NewValue:      string(newValue),
		Operator:      operator,
		Description:   fmt.Sprintf("新增物料：%s", material.Name),
	}
	return s.logRepo.Create(log)
}

func (s *MaterialLogService) LogUpdate(material *model.Material, oldMaterial *model.Material, operator string) error {
	oldValue, _ := json.Marshal(oldMaterial)
	newValue, _ := json.Marshal(material)
	log := &model.MaterialLog{
		OperationType: "UPDATE",
		MaterialID:    material.ID,
		OldValue:      string(oldValue),
		NewValue:      string(newValue),
		Operator:      operator,
		Description:   fmt.Sprintf("修改物料：%s", material.Name),
	}
	return s.logRepo.Create(log)
}

func (s *MaterialLogService) LogDelete(material *model.Material, operator string) error {
	oldValue, _ := json.Marshal(material)
	log := &model.MaterialLog{
		OperationType: "DELETE",
		MaterialID:    material.ID,
		OldValue:      string(oldValue),
		Operator:      operator,
		Description:   fmt.Sprintf("删除物料：%s", material.Name),
	}
	return s.logRepo.Create(log)
}

func (s *MaterialLogService) List(operationType, materialId, startDate, endDate string, limit, offset int) ([]model.MaterialLog, int64, error) {
	return s.logRepo.List(operationType, materialId, startDate, endDate, limit, offset)
}

func (s *MaterialLogService) GetByMaterialID(materialID int64) ([]model.MaterialLog, error) {
	return s.logRepo.GetByMaterialID(materialID)
}