package usecase

import (
	"chat/internal/domain/repository"
	"chat/internal/domain/usecase"
	"context"
	"fmt"
)

type matchmakingUseCase struct {
	matchmakingRepo repository.MatchmakingRepository
}

// NewMatchmakingUseCase 創建新的配對 UseCase
func NewMatchmakingUseCase(matchmakingRepo repository.MatchmakingRepository) usecase.MatchmakingUseCase {
	return &matchmakingUseCase{
		matchmakingRepo: matchmakingRepo,
	}
}

// JoinQueue 加入配對佇列
func (u *matchmakingUseCase) JoinQueue(ctx context.Context, uid string) (status string, err error) {
	status, _, err = u.matchmakingRepo.JoinQueue(ctx, uid)
	if err != nil {
		return "", fmt.Errorf("failed to join queue: %w", err)
	}
	return status, nil
}

// GetStatus 查詢配對狀態
func (u *matchmakingUseCase) GetStatus(ctx context.Context, uid string) (status string, roomID string, err error) {
	status, roomID, err = u.matchmakingRepo.GetMatchStatus(ctx, uid)
	if err != nil {
		return "", "", fmt.Errorf("failed to get match status: %w", err)
	}
	return status, roomID, nil
}