package processor

import (
	"context"
	"fmt"

	"apskel-pos-be/internal/models"
	"apskel-pos-be/internal/repository"

	"github.com/google/uuid"
)

type CustomerPointsProcessor struct {
	walletQuery *WalletQueryProcessor
	gameRepo    *repository.GameRepository
}

func NewCustomerPointsProcessor(walletQuery *WalletQueryProcessor, gameRepo *repository.GameRepository) *CustomerPointsProcessor {
	return &CustomerPointsProcessor{
		walletQuery: walletQuery,
		gameRepo:    gameRepo,
	}
}

// Existing gamification methods - placeholder implementations
func (p *CustomerPointsProcessor) CreateCustomerPoints(ctx context.Context, req *models.CreateCustomerPointsRequest) (*models.CustomerPointsResponse, error) {
	// TODO: Implement this method
	return nil, fmt.Errorf("not implemented")
}

func (p *CustomerPointsProcessor) GetCustomerPoints(ctx context.Context, id uuid.UUID) (*models.CustomerPointsResponse, error) {
	// TODO: Implement this method
	return nil, fmt.Errorf("not implemented")
}

func (p *CustomerPointsProcessor) GetCustomerPointsByCustomerID(ctx context.Context, customerID uuid.UUID) (*models.CustomerPointsResponse, error) {
	// TODO: Implement this method
	return nil, fmt.Errorf("not implemented")
}

func (p *CustomerPointsProcessor) ListCustomerPoints(ctx context.Context, query *models.ListCustomerPointsQuery) (*models.PaginatedCustomerPointsResponse, error) {
	// Return empty paginated response for now
	return &models.PaginatedCustomerPointsResponse{
		Data:       []models.CustomerPointsResponse{},
		TotalCount: 0,
		Page:       1,
		Limit:      10,
		TotalPages: 0,
	}, nil
}

func (p *CustomerPointsProcessor) UpdateCustomerPoints(ctx context.Context, id uuid.UUID, req *models.UpdateCustomerPointsRequest) (*models.CustomerPointsResponse, error) {
	// TODO: Implement this method
	return nil, fmt.Errorf("not implemented")
}

func (p *CustomerPointsProcessor) DeleteCustomerPoints(ctx context.Context, id uuid.UUID) error {
	// TODO: Implement this method
	return fmt.Errorf("not implemented")
}

func (p *CustomerPointsProcessor) AddPoints(ctx context.Context, customerID uuid.UUID, points int64) (*models.CustomerPointsResponse, error) {
	// TODO: Implement this method
	return nil, fmt.Errorf("not implemented")
}

func (p *CustomerPointsProcessor) DeductPoints(ctx context.Context, customerID uuid.UUID, points int64) (*models.CustomerPointsResponse, error) {
	// TODO: Implement this method
	return nil, fmt.Errorf("not implemented")
}

// The three endpoints below are the customer app's balance screens. They read the
// EnakPoint & EnakCoin wallet; customer_points and customer_tokens are no longer used
// for balances (docs/prd-point-coin.md §9).

func (p *CustomerPointsProcessor) GetCustomerTotalPointsAPI(ctx context.Context, customerID string) (*models.GetCustomerPointsResponse, error) {
	id, err := parseWalletCustomerID(customerID)
	if err != nil {
		return nil, err
	}
	data, err := p.walletQuery.LegacyPoints(ctx, id)
	if err != nil {
		return nil, fmt.Errorf("failed to get customer points: %w", err)
	}
	return &models.GetCustomerPointsResponse{
		Status:  "SUCCESS",
		Message: "Customer points retrieved successfully.",
		Data:    data,
	}, nil
}

func (p *CustomerPointsProcessor) GetCustomerTotalTokensAPI(ctx context.Context, customerID string) (*models.GetCustomerTokensResponse, error) {
	id, err := parseWalletCustomerID(customerID)
	if err != nil {
		return nil, err
	}
	data, err := p.walletQuery.LegacyTokens(ctx, id)
	if err != nil {
		return nil, fmt.Errorf("failed to get customer tokens: %w", err)
	}
	return &models.GetCustomerTokensResponse{
		Status:  "SUCCESS",
		Message: "Customer tokens retrieved successfully.",
		Data:    data,
	}, nil
}

func (p *CustomerPointsProcessor) GetCustomerWalletAPI(ctx context.Context, customerID string) (*models.GetCustomerWalletResponse, error) {
	id, err := parseWalletCustomerID(customerID)
	if err != nil {
		return nil, err
	}
	data, err := p.walletQuery.Summary(ctx, id)
	if err != nil {
		return nil, fmt.Errorf("failed to get customer wallet: %w", err)
	}
	return &models.GetCustomerWalletResponse{
		Status:  "SUCCESS",
		Message: "Customer wallet retrieved successfully.",
		Data:    data,
	}, nil
}

func (p *CustomerPointsProcessor) GetCustomerWalletTransactionsAPI(ctx context.Context, customerID string, query models.ListCustomerWalletTransactionsQuery) (*models.PaginatedResponse[models.CustomerWalletTransaction], error) {
	id, err := parseWalletCustomerID(customerID)
	if err != nil {
		return nil, err
	}
	return p.walletQuery.Transactions(ctx, id, query)
}

func parseWalletCustomerID(customerID string) (uuid.UUID, error) {
	id, err := uuid.Parse(customerID)
	if err != nil {
		return uuid.Nil, fmt.Errorf("%w: invalid customer id", ErrInvalidWalletQuery)
	}
	return id, nil
}

// GetCustomerGamesAPI gets active SPIN games for customers
func (p *CustomerPointsProcessor) GetCustomerGamesAPI(ctx context.Context) (*models.GetCustomerGamesResponse, error) {
	// Get active SPIN games
	games, err := p.gameRepo.GetActiveSpinGames(ctx)
	if err != nil {
		return nil, fmt.Errorf("failed to get active SPIN games: %w", err)
	}

	// Convert to response format
	var gameResponses []models.CustomerGameResponse
	for _, game := range games {
		var prizeResponses []models.CustomerGamePrizeResponse
		for _, prize := range game.Prizes {
			prizeResponses = append(prizeResponses, models.CustomerGamePrizeResponse{
				ID:        prize.ID,
				GameID:    prize.GameID,
				Name:      prize.Name,
				Image:     prize.Image,
				Metadata:  (*map[string]interface{})(&prize.Metadata),
				CreatedAt: prize.CreatedAt,
				UpdatedAt: prize.UpdatedAt,
			})
		}

		gameResponses = append(gameResponses, models.CustomerGameResponse{
			ID:        game.ID,
			Name:      game.Name,
			Type:      string(game.Type),
			IsActive:  game.IsActive,
			Metadata:  (*map[string]interface{})(&game.Metadata),
			Prizes:    prizeResponses,
			CreatedAt: game.CreatedAt,
			UpdatedAt: game.UpdatedAt,
		})
	}

	return &models.GetCustomerGamesResponse{
		Status:  "SUCCESS",
		Message: "Customer games retrieved successfully.",
		Data: &models.GetCustomerGamesResponseData{
			Games: gameResponses,
		},
	}, nil
}

// GetFerrisWheelGameAPI gets the Ferris Wheel game for customers
func (p *CustomerPointsProcessor) GetFerrisWheelGameAPI(ctx context.Context) (*models.GetFerrisWheelGameResponse, error) {
	// Get Ferris Wheel game
	game, err := p.gameRepo.GetFerrisWheelGame(ctx)
	if err != nil {
		return nil, fmt.Errorf("failed to get Ferris Wheel game: %w", err)
	}

	// Convert prizes to response format
	var prizeResponses []models.CustomerGamePrizeResponse
	for _, prize := range game.Prizes {
		prizeResponses = append(prizeResponses, models.CustomerGamePrizeResponse{
			ID:        prize.ID,
			GameID:    prize.GameID,
			Name:      prize.Name,
			Image:     prize.Image,
			Metadata:  (*map[string]interface{})(&prize.Metadata),
			CreatedAt: prize.CreatedAt,
			UpdatedAt: prize.UpdatedAt,
		})
	}

	// Convert game to response format
	gameResponse := models.CustomerGameResponse{
		ID:        game.ID,
		Name:      game.Name,
		Type:      string(game.Type),
		IsActive:  game.IsActive,
		Metadata:  (*map[string]interface{})(&game.Metadata),
		Prizes:    prizeResponses,
		CreatedAt: game.CreatedAt,
		UpdatedAt: game.UpdatedAt,
	}

	return &models.GetFerrisWheelGameResponse{
		Status:  "SUCCESS",
		Message: "Ferris Wheel game retrieved successfully.",
		Data: &models.GetFerrisWheelGameResponseData{
			Game: gameResponse,
		},
	}, nil
}