using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Sozsoft.Platform.Entities;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Application.Services;
using Volo.Abp.Domain.Repositories;

namespace Sozsoft.Platform.AiBots;

[Authorize]
public class AiBotAppService : CrudAppService<
    AiBot,
    AiBotDto,
    Guid,
    PagedAndSortedResultRequestDto>
{
    public AiBotAppService(IRepository<AiBot, Guid> repo) : base(repo)
    {

    }

    public override async Task<PagedResultDto<AiBotDto>> GetListAsync(PagedAndSortedResultRequestDto input)
    {
        await CheckGetListPolicyAsync();

        if (CurrentTenant.IsAvailable && !string.IsNullOrWhiteSpace(CurrentTenant.Name))
        {
            var tenantName = CurrentTenant.Name;
            List<AiBot> tenantEntities;

            using (CurrentTenant.Change(null))
            {
                var hostQuery = await CreateFilteredQueryAsync(input);
                tenantEntities = await AsyncExecuter.ToListAsync(hostQuery);
            }

            var filteredQuery = tenantEntities
                .Where(aiBot => IsAvailableForTenant(aiBot.Tenants, tenantName))
                .AsQueryable();

            var tenantTotalCount = filteredQuery.LongCount();
            filteredQuery = ApplySorting(filteredQuery, input);
            filteredQuery = ApplyPaging(filteredQuery, input);

            var tenantDtos = await MapToGetListOutputDtosAsync(filteredQuery.ToList());

            return new PagedResultDto<AiBotDto>(tenantTotalCount, tenantDtos);
        }

        var query = await CreateFilteredQueryAsync(input);
        var totalCount = await AsyncExecuter.CountAsync(query);
        query = ApplySorting(query, input);
        query = ApplyPaging(query, input);

        var entities = await AsyncExecuter.ToListAsync(query);
        var dtos = await MapToGetListOutputDtosAsync(entities);

        return new PagedResultDto<AiBotDto>(totalCount, dtos);
    }

    private static bool IsAvailableForTenant(string tenants, string tenantName)
    {
        if (string.IsNullOrWhiteSpace(tenants))
        {
            return true;
        }

        return tenants
            .Split('|', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
            .Any(name => string.Equals(name, tenantName, StringComparison.OrdinalIgnoreCase));
    }
}