package use_cases

import (
	"context"

	"github.com/rwadurian/mpc-system/services/account/application/ports"
	"github.com/rwadurian/mpc-system/services/account/domain/entities"
	"github.com/rwadurian/mpc-system/services/account/domain/repositories"
	"github.com/rwadurian/mpc-system/services/account/domain/services"
)

// InitiateRecoveryUseCase handles initiating account recovery
type InitiateRecoveryUseCase struct {
	accountRepo    repositories.AccountRepository
	recoveryRepo   repositories.RecoverySessionRepository
	domainService  *services.AccountDomainService
	eventPublisher ports.EventPublisher
}

// NewInitiateRecoveryUseCase creates a new InitiateRecoveryUseCase
func NewInitiateRecoveryUseCase(
	accountRepo repositories.AccountRepository,
	recoveryRepo repositories.RecoverySessionRepository,
	domainService *services.AccountDomainService,
	eventPublisher ports.EventPublisher,
) *InitiateRecoveryUseCase {
	return &InitiateRecoveryUseCase{
		accountRepo:    accountRepo,
		recoveryRepo:   recoveryRepo,
		domainService:  domainService,
		eventPublisher: eventPublisher,
	}
}

// Execute initiates account recovery
func (uc *InitiateRecoveryUseCase) Execute(ctx context.Context, input ports.InitiateRecoveryInput) (*ports.InitiateRecoveryOutput, error) {
	// Check if there's already an active recovery session
	existingRecovery, err := uc.recoveryRepo.GetActiveByAccountID(ctx, input.AccountID)
	if err == nil && existingRecovery != nil {
		return nil, &entities.AccountError{
			Code:    "RECOVERY_ALREADY_IN_PROGRESS",
			Message: "there is already an active recovery session for this account",
		}
	}

	// Initiate recovery using domain service
	recoverySession, err := uc.domainService.InitiateRecovery(ctx, input.AccountID, input.RecoveryType, input.OldShareType)
	if err != nil {
		return nil, err
	}

	// Publish event
	if uc.eventPublisher != nil {
		_ = uc.eventPublisher.Publish(ctx, ports.AccountEvent{
			Type:      ports.EventTypeRecoveryStarted,
			AccountID: input.AccountID.String(),
			Data: map[string]interface{}{
				"recoverySessionId": recoverySession.ID.String(),
				"recoveryType":      input.RecoveryType.String(),
			},
		})
	}

	return &ports.InitiateRecoveryOutput{
		RecoverySession: recoverySession,
	}, nil
}

// CompleteRecoveryUseCase handles completing account recovery
type CompleteRecoveryUseCase struct {
	accountRepo    repositories.AccountRepository
	shareRepo      repositories.AccountShareRepository
	recoveryRepo   repositories.RecoverySessionRepository
	domainService  *services.AccountDomainService
	eventPublisher ports.EventPublisher
}

// NewCompleteRecoveryUseCase creates a new CompleteRecoveryUseCase
func NewCompleteRecoveryUseCase(
	accountRepo repositories.AccountRepository,
	shareRepo repositories.AccountShareRepository,
	recoveryRepo repositories.RecoverySessionRepository,
	domainService *services.AccountDomainService,
	eventPublisher ports.EventPublisher,
) *CompleteRecoveryUseCase {
	return &CompleteRecoveryUseCase{
		accountRepo:    accountRepo,
		shareRepo:      shareRepo,
		recoveryRepo:   recoveryRepo,
		domainService:  domainService,
		eventPublisher: eventPublisher,
	}
}

// Execute completes account recovery
func (uc *CompleteRecoveryUseCase) Execute(ctx context.Context, input ports.CompleteRecoveryInput) (*ports.CompleteRecoveryOutput, error) {
	// Convert shares input
	newShares := make([]services.ShareInfo, len(input.NewShares))
	for i, s := range input.NewShares {
		newShares[i] = services.ShareInfo{
			ShareType:  s.ShareType,
			PartyID:    s.PartyID,
			PartyIndex: s.PartyIndex,
			DeviceType: s.DeviceType,
			DeviceID:   s.DeviceID,
		}
	}

	// Complete recovery using domain service
	err := uc.domainService.CompleteRecovery(
		ctx,
		input.RecoverySessionID,
		input.NewPublicKey,
		input.NewKeygenSessionID,
		newShares,
	)
	if err != nil {
		return nil, err
	}

	// Get recovery session to get account ID
	recovery, err := uc.recoveryRepo.GetByID(ctx, input.RecoverySessionID)
	if err != nil {
		return nil, err
	}

	// Get updated account
	account, err := uc.accountRepo.GetByID(ctx, recovery.AccountID)
	if err != nil {
		return nil, err
	}

	// Publish event
	if uc.eventPublisher != nil {
		_ = uc.eventPublisher.Publish(ctx, ports.AccountEvent{
			Type:      ports.EventTypeRecoveryComplete,
			AccountID: account.ID.String(),
			Data: map[string]interface{}{
				"recoverySessionId":  input.RecoverySessionID,
				"newKeygenSessionId": input.NewKeygenSessionID.String(),
			},
		})
	}

	return &ports.CompleteRecoveryOutput{
		Account: account,
	}, nil
}

// GetRecoveryStatusInput represents input for getting recovery status
type GetRecoveryStatusInput struct {
	RecoverySessionID string
}

// GetRecoveryStatusOutput represents output from getting recovery status
type GetRecoveryStatusOutput struct {
	RecoverySession *entities.RecoverySession
}

// GetRecoveryStatusUseCase handles getting recovery session status
type GetRecoveryStatusUseCase struct {
	recoveryRepo repositories.RecoverySessionRepository
}

// NewGetRecoveryStatusUseCase creates a new GetRecoveryStatusUseCase
func NewGetRecoveryStatusUseCase(recoveryRepo repositories.RecoverySessionRepository) *GetRecoveryStatusUseCase {
	return &GetRecoveryStatusUseCase{
		recoveryRepo: recoveryRepo,
	}
}

// Execute gets recovery session status
func (uc *GetRecoveryStatusUseCase) Execute(ctx context.Context, input GetRecoveryStatusInput) (*GetRecoveryStatusOutput, error) {
	recovery, err := uc.recoveryRepo.GetByID(ctx, input.RecoverySessionID)
	if err != nil {
		return nil, err
	}

	return &GetRecoveryStatusOutput{
		RecoverySession: recovery,
	}, nil
}

// CancelRecoveryInput represents input for canceling recovery
type CancelRecoveryInput struct {
	RecoverySessionID string
}

// CancelRecoveryUseCase handles canceling recovery
type CancelRecoveryUseCase struct {
	accountRepo  repositories.AccountRepository
	recoveryRepo repositories.RecoverySessionRepository
}

// NewCancelRecoveryUseCase creates a new CancelRecoveryUseCase
func NewCancelRecoveryUseCase(
	accountRepo repositories.AccountRepository,
	recoveryRepo repositories.RecoverySessionRepository,
) *CancelRecoveryUseCase {
	return &CancelRecoveryUseCase{
		accountRepo:  accountRepo,
		recoveryRepo: recoveryRepo,
	}
}

// Execute cancels a recovery session
func (uc *CancelRecoveryUseCase) Execute(ctx context.Context, input CancelRecoveryInput) error {
	// Get recovery session
	recovery, err := uc.recoveryRepo.GetByID(ctx, input.RecoverySessionID)
	if err != nil {
		return err
	}

	// Check if recovery can be canceled
	if recovery.IsCompleted() {
		return &entities.AccountError{
			Code:    "RECOVERY_CANNOT_CANCEL",
			Message: "cannot cancel completed recovery",
		}
	}

	// Mark recovery as failed
	if err := recovery.Fail(); err != nil {
		return err
	}

	// Update recovery session
	if err := uc.recoveryRepo.Update(ctx, recovery); err != nil {
		return err
	}

	// Reactivate account
	account, err := uc.accountRepo.GetByID(ctx, recovery.AccountID)
	if err != nil {
		return err
	}

	account.Activate()
	if err := uc.accountRepo.Update(ctx, account); err != nil {
		return err
	}

	return nil
}