package service

import (
	"context"

	"github.com/Caknoooo/go-gin-clean-starter/database/entities"
	"github.com/Caknoooo/go-gin-clean-starter/modules/zona/dto"
	"github.com/Caknoooo/go-gin-clean-starter/modules/zona/query"
	"github.com/Caknoooo/go-gin-clean-starter/modules/zona/repository"
	"github.com/Caknoooo/go-gin-clean-starter/pkg/constants"
	"github.com/Caknoooo/go-gin-clean-starter/pkg/utils"
	"github.com/google/uuid"
	"github.com/sirupsen/logrus"
	"gorm.io/gorm"
)

type ZonaService interface {
	Create(ctx context.Context, req dto.ZonaCreateRequest) (dto.ZonaResponse, error)
	GetById(ctx context.Context, zonaId string) (dto.ZonaResponse, error)
	GetAll(ctx context.Context, filter query.ZonaFilter) ([]dto.ZonaResponse, int64, error)
	Update(ctx context.Context, req dto.ZonaUpdateRequest, zonaId string) (dto.ZonaResponse, error)
	Delete(ctx context.Context, zonaId string) error
}

type zonaService struct {
	db       *gorm.DB
	zonaRepo repository.ZonaRepository
	log      *logrus.Logger
}

func (s *zonaService) Create(ctx context.Context, req dto.ZonaCreateRequest) (dto.ZonaResponse, error) {
	tx := s.db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	warehouseUUID, err := uuid.Parse(req.WarehouseID)
	if err != nil {
		tx.Rollback()
		return dto.ZonaResponse{}, err
	}
	clientUUID, err := uuid.Parse(req.ClientID)
	if err != nil {
		tx.Rollback()
		return dto.ZonaResponse{}, err
	}
	zona := entities.MZonaEntity{
		Code:           req.Code,
		Name:           req.Name,
		Type:           req.Type,
		Temperature:    req.Temperature,
		Hazardous:      req.Hazardous,
		WarehouseID:    warehouseUUID,
		ClientID:       clientUUID,
		FullAuditTrail: utils.FillAuditTrail(ctx, constants.CREATE),
	}
	created, err := s.zonaRepo.Create(ctx, tx, zona)
	if err != nil {
		tx.Rollback()
		return dto.ZonaResponse{}, err
	}
	tx.Commit()
	result, err := s.zonaRepo.GetById(ctx, nil, created.ID.String())
	if err != nil {
		return dto.ZonaResponse{}, err
	}
	s.log.WithFields(logrus.Fields{
		"user_id":   utils.GetUserID(ctx),
		"action":    "create",
		"entity":    "zona",
		"entity_id": created.ID.String(),
	}).Info("Zona created")
	return dto.ToZonaResponse(result), nil
}

func (s *zonaService) GetById(ctx context.Context, zonaId string) (dto.ZonaResponse, error) {
	zona, err := s.zonaRepo.GetById(ctx, nil, zonaId)
	if err != nil {
		return dto.ZonaResponse{}, err
	}
	return dto.ToZonaResponse(zona), nil
}

func (s *zonaService) GetAll(ctx context.Context, filter query.ZonaFilter) ([]dto.ZonaResponse, int64, error) {
	zonas, total, err := s.zonaRepo.GetAll(ctx, filter)
	if err != nil {
		return nil, 0, err
	}
	var responses []dto.ZonaResponse
	for _, e := range zonas {
		responses = append(responses, dto.ToZonaResponse(e))
	}
	if responses == nil {
		responses = make([]dto.ZonaResponse, 0)
	}
	return responses, total, nil
}

func (s *zonaService) Update(ctx context.Context, req dto.ZonaUpdateRequest, zonaId string) (dto.ZonaResponse, error) {
	tx := s.db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	zona, err := s.zonaRepo.GetById(ctx, tx, zonaId)
	if err != nil {
		tx.Rollback()
		return dto.ZonaResponse{}, err
	}
	before := zona
	if req.Code != "" {
		zona.Code = req.Code
	}
	if req.Name != "" {
		zona.Name = req.Name
	}
	if req.Type != "" {
		zona.Type = req.Type
	}
	zona.Temperature = req.Temperature
	zona.Hazardous = req.Hazardous
	zona.IsActive = req.IsActive
	zona.FullAuditTrail = utils.FillAuditTrail(ctx, constants.UPDATE)
	updated, err := s.zonaRepo.Update(ctx, tx, zona)
	if err != nil {
		tx.Rollback()
		return dto.ZonaResponse{}, err
	}
	tx.Commit()
	result, err := s.zonaRepo.GetById(ctx, nil, updated.ID.String())
	if err != nil {
		return dto.ZonaResponse{}, err
	}
	changes := utils.GetChangedFields(before, result)
	s.log.WithFields(logrus.Fields{
		"user_id":   utils.GetUserID(ctx),
		"action":    "update",
		"entity":    "zona",
		"entity_id": zonaId,
		"changes":   changes,
	}).Info("Zona updated")
	return dto.ToZonaResponse(result), nil
}

func (s *zonaService) Delete(ctx context.Context, zonaId string) error {
	tx := s.db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	zona, err := s.zonaRepo.GetById(ctx, tx, zonaId)
	if err != nil {
		tx.Rollback()
		return err
	}
	zona.FullAuditTrail = utils.FillAuditTrail(ctx, constants.DELETE)
	if _, err := s.zonaRepo.Update(ctx, tx, zona); err != nil {
		tx.Rollback()
		return err
	}
	if err := s.zonaRepo.Delete(ctx, tx, zonaId); err != nil {
		tx.Rollback()
		return err
	}
	tx.Commit()
	s.log.WithFields(logrus.Fields{
		"user_id":   utils.GetUserID(ctx),
		"action":    "delete",
		"entity":    "zona",
		"entity_id": zonaId,
	}).Info("Zona deleted")
	return nil
}

func NewZonaService(zonaRepo repository.ZonaRepository, db *gorm.DB, log *logrus.Logger) ZonaService {
	return &zonaService{
		zonaRepo: zonaRepo,
		db:       db,
		log:      log,
	}
}