using MessageService.Domain.Entities;
using MessageService.Domain.IReposities;
using MessageService.Domain.Models;
using Microsoft.EntityFrameworkCore;

namespace MessageService.Infrastructure.Reposities
{
    public class ConversationReposity : IConversationReposity
    {
        private readonly MessageDbContext db;

        public ConversationReposity(MessageDbContext db)
        {
            this.db = db;
        }

        public void Create(Conversation conversation)
        {
            db.Conversations.Add(conversation);
        }

        public async Task<IEnumerable<string>> FindAllStreamKeyAsync(Guid userId, CancellationToken cancellationToken = default)
        {
            return await db.Conversations.Where(x => x.UserId == userId)
                .AsNoTracking()
                .Select(s => s.StreamKey)
                .ToListAsync(cancellationToken);
        }

        public async Task<Conversation?> FindByIdAsync(Guid id, CancellationToken cancellationToken = default)
        {
            return await db.Conversations.FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
        }

        public async Task<IEnumerable<Conversation>> FindByStreamKeyAsync(string streamKey, CancellationToken cancellationToken = default)
        {
            return await db.Conversations.Where(x => x.StreamKey == streamKey).ToListAsync(cancellationToken);
        }

        public async Task<IEnumerable<Conversation>> FindByTargetIdAsync(Guid targetId, CancellationToken cancellationToken = default)
        {
            return await db.Conversations.Where(x => x.TargetId == targetId).ToListAsync(cancellationToken);
        }

        public async Task<IReadOnlyList<ConversationSummary>> ListByUserIdAsync(Guid userId, CancellationToken cancellationToken = default)
        {
            return await db.Conversations
                .AsNoTracking()
                .Where(x => x.UserId == userId)
                .OrderByDescending(x => x.LastMessageTime ?? x.CreationTime)
                .Select(x => new ConversationSummary(
                    x.Id,
                    x.UserId,
                    x.TargetId,
                    x.TargetAvatar,
                    x.TargetName,
                    x.LastReadSequenceId,
                    x.UnreadCount,
                    x.ChatType,
                    x.LastMessage,
                    x.LastMessageTime ?? x.CreationTime))
                .ToListAsync(cancellationToken);
        }

        public Task<Conversation?> FindActiveAsync(Guid userId, Guid targetId, Domain.Enums.ChatType chatType, CancellationToken cancellationToken = default)
        {
            return db.Conversations.FirstOrDefaultAsync(
                x => x.UserId == userId && x.TargetId == targetId && x.ChatType == chatType,
                cancellationToken);
        }
    }
}