package service

import (
	"context"

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

type InventoryMovementService interface {
	Create(ctx context.Context, req dtodomain.InventoryMovementCreateRequest) (dtodomain.InventoryMovementResponse, error)
	GetById(ctx context.Context, id string) (dtodomain.InventoryMovementResponse, error)
	GetAll(ctx context.Context, filter query.InventoryMovementFilter) ([]dtodomain.InventoryMovementResponse, int64, error)
	Update(ctx context.Context, req dtodomain.InventoryMovementUpdateRequest, id string) (dtodomain.InventoryMovementResponse, error)
	Delete(ctx context.Context, id string) error
	CreateLine(ctx context.Context, movementId string, req dtodomain.InventoryMovementLineCreateRequest) (dtodomain.InventoryMovementLineResponse, error)
	UpdateLine(ctx context.Context, lineId string, req dtodomain.InventoryMovementLineUpdateRequest) (dtodomain.InventoryMovementLineResponse, error)
	DeleteLine(ctx context.Context, lineId string) error
}

type inventoryMovementService struct {
	db               *gorm.DB
	movementRepo     repository.InventoryMovementRepository
	movementLineRepo repository.InventoryMovementLineRepository
}

func (s *inventoryMovementService) Create(ctx context.Context, req dtodomain.InventoryMovementCreateRequest) (dtodomain.InventoryMovementResponse, error) {
	tx := s.db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	clientUUID, err := uuid.Parse(req.ClientID)
	if err != nil {
		tx.Rollback()
		return dtodomain.InventoryMovementResponse{}, err
	}
	movNumber, err := entities.GenerateDocumentNumberInvMovement(s.db, req.ClientID)
	if err != nil {
		tx.Rollback()
		return dtodomain.InventoryMovementResponse{}, err
	}
	movement := entities.TInventoryMovementEntity{
		MovementNumber:        movNumber,
		MovementDate:          utils.StringToDateTime(req.MovementDate),
		MovementType:          req.MovementType,
		ClientID:              clientUUID,
		Status:                req.Status,
		SourceLocationID:      uuid.MustParse(req.SourceLocationID),
		DestinationLocationID: uuid.MustParse(req.DestinationLocationID),
	}
	created, err := s.movementRepo.Create(ctx, tx, movement)
	if err != nil {
		tx.Rollback()
		return dtodomain.InventoryMovementResponse{}, err
	}
	// Bulk create lines
	var lines []entities.TInventoryMovementLineEntity
	for _, lineReq := range req.MovementLines {
		productUUID := uuid.Nil
		if lineReq.ProductID != "" {
			productUUID, err = uuid.Parse(lineReq.ProductID)
			if err != nil {
				tx.Rollback()
				return dtodomain.InventoryMovementResponse{}, err
			}
		}
		clientLineUUID, err := uuid.Parse(lineReq.ClientID)
		if err != nil {
			tx.Rollback()
			return dtodomain.InventoryMovementResponse{}, err
		}
		lines = append(lines, entities.TInventoryMovementLineEntity{
			MovedQuantity: lineReq.MovedQuantity,
			InvMovementID: created.ID,
			ProductID:     productUUID,
			StorageID:     uuid.MustParse(lineReq.StorageID),
			ClientID:      clientLineUUID,
			Status:        lineReq.Status,
		})
	}
	if len(lines) > 0 {
		err = s.movementLineRepo.BulkCreate(ctx, tx, lines)
		if err != nil {
			tx.Rollback()
			return dtodomain.InventoryMovementResponse{}, err
		}
	}
	tx.Commit()
	result, err := s.movementRepo.GetById(ctx, nil, created.ID.String())
	if err != nil {
		return dtodomain.InventoryMovementResponse{}, err
	}
	return dtodomain.ToInventoryMovementResponse(result), nil
}

func (s *inventoryMovementService) GetById(ctx context.Context, id string) (dtodomain.InventoryMovementResponse, error) {
	movement, err := s.movementRepo.GetById(ctx, nil, id)
	if err != nil {
		return dtodomain.InventoryMovementResponse{}, err
	}
	return dtodomain.ToInventoryMovementResponse(movement), nil
}

func (s *inventoryMovementService) GetAll(ctx context.Context, filter query.InventoryMovementFilter) ([]dtodomain.InventoryMovementResponse, int64, error) {
	movements, total, err := s.movementRepo.GetAll(ctx, filter)
	if err != nil {
		return nil, 0, err
	}
	var responses []dtodomain.InventoryMovementResponse
	for _, e := range movements {
		responses = append(responses, dtodomain.ToInventoryMovementResponse(e))
	}
	if responses == nil {
		responses = make([]dtodomain.InventoryMovementResponse, 0)
	}
	return responses, total, nil
}

func (s *inventoryMovementService) Update(ctx context.Context, req dtodomain.InventoryMovementUpdateRequest, id string) (dtodomain.InventoryMovementResponse, error) {
	tx := s.db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	movement, err := s.movementRepo.GetById(ctx, tx, id)
	if err != nil {
		tx.Rollback()
		return dtodomain.InventoryMovementResponse{}, err
	}
	// if req.MovementNumber != "" {
	// 	movement.MovementNumber = req.MovementNumber
	// }
	movement.MovementDate = utils.StringToDateTime(req.MovementDate)
	movement.MovementType = req.MovementType
	movement.Status = req.Status
	updated, err := s.movementRepo.Update(ctx, tx, movement)
	if err != nil {
		tx.Rollback()
		return dtodomain.InventoryMovementResponse{}, err
	}
	tx.Commit()
	result, err := s.movementRepo.GetById(ctx, nil, updated.ID.String())
	if err != nil {
		return dtodomain.InventoryMovementResponse{}, err
	}
	return dtodomain.ToInventoryMovementResponse(result), nil
}

func (s *inventoryMovementService) Delete(ctx context.Context, id string) error {
	tx := s.db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	if err := s.movementRepo.Delete(ctx, tx, id); err != nil {
		tx.Rollback()
		return err
	}
	tx.Commit()
	return nil
}

func (s *inventoryMovementService) CreateLine(ctx context.Context, movementId string, req dtodomain.InventoryMovementLineCreateRequest) (dtodomain.InventoryMovementLineResponse, error) {
	movementUUID, err := uuid.Parse(movementId)
	if err != nil {
		return dtodomain.InventoryMovementLineResponse{}, err
	}
	productUUID := uuid.Nil
	if req.ProductID != "" {
		productUUID, err = uuid.Parse(req.ProductID)
		if err != nil {
			return dtodomain.InventoryMovementLineResponse{}, err
		}
	}
	clientLineUUID, err := uuid.Parse(req.ClientID)
	if err != nil {
		return dtodomain.InventoryMovementLineResponse{}, err
	}
	line := entities.TInventoryMovementLineEntity{
		MovedQuantity: req.MovedQuantity,
		InvMovementID: movementUUID,
		ProductID:     productUUID,
		StorageID:     uuid.MustParse(req.StorageID),
		ClientID:      clientLineUUID,
		Status:        req.Status,
	}
	created, err := s.movementLineRepo.Create(ctx, nil, line)
	if err != nil {
		return dtodomain.InventoryMovementLineResponse{}, err
	}
	return dtodomain.ToInventoryMovementLineResponse(created), nil
}

func (s *inventoryMovementService) UpdateLine(ctx context.Context, lineId string, req dtodomain.InventoryMovementLineUpdateRequest) (dtodomain.InventoryMovementLineResponse, error) {
	line, err := s.movementLineRepo.GetById(ctx, nil, lineId)
	if err != nil {
		return dtodomain.InventoryMovementLineResponse{}, err
	}
	if req.MovedQuantity != nil {
		line.MovedQuantity = *req.MovedQuantity
	}
	if req.Status != nil {
		line.Status = *req.Status
	}
	updated, err := s.movementLineRepo.Update(ctx, nil, line)
	if err != nil {
		return dtodomain.InventoryMovementLineResponse{}, err
	}
	return dtodomain.ToInventoryMovementLineResponse(updated), nil
}

func (s *inventoryMovementService) DeleteLine(ctx context.Context, lineId string) error {
	return s.movementLineRepo.Delete(ctx, nil, lineId)
}

func NewInventoryMovementService(db *gorm.DB, movementRepo repository.InventoryMovementRepository, movementLineRepo repository.InventoryMovementLineRepository) InventoryMovementService {
	return &inventoryMovementService{
		db:               db,
		movementRepo:     movementRepo,
		movementLineRepo: movementLineRepo,
	}
}