using System.Reflection.Metadata;
using SJZY.Track.Domain.Consts;
using SJZY.Track.Domain.Dtos.Common;
using SJZY.Track.Domain.Queries;
using SJZY.Track.Domain.VEntities;

namespace SJZY.Track.Repository.Queries;

public class TimezoneQueries:ITimezoneQueries, ISugarRepository, ITransientDependency
{
    public ISqlSugarClient Context { get; set; }

    public TimezoneQueries()
    {
        Context = SqlsugarScopeBasic.GetContextSafely("default");
    }

    private string GetCityKey(string cityEnName)
    {
        return $"{GlobalConst.CityTimezoneKeyPrefix}:{cityEnName}";
    }
    
    private string GetPortKey(string airCode)
    {
        return $"{GlobalConst.PortTimezoneKeyPrefix}:{airCode}";
    }
    
    /// <summary>
    /// 获取城市时区
    /// </summary>
    /// <param name="cityEnName">城市英文名称</param>
    /// <returns>时区</returns>
    public async Task<string> GetCityTimezone(string cityEnName)
    {
        var key =GetCityKey(cityEnName);
        var timezone = RedisHelper.Client.Get<string>(key);
        if (!string.IsNullOrEmpty(timezone))
        {
            return timezone;
        }
        
        var cityTimezone = await GetTimezoneByCityName(cityEnName);
        if (cityTimezone == null!)
        {
            await RedisHelper.Client.SetAsync(key, string.Empty, TimeSpan.FromSeconds(20));
            return string.Empty;
        }

        await RedisHelper.Client.SetAsync(key, cityTimezone.Timezone, TimeSpan.FromHours(6));
        return cityTimezone.Timezone;
    }
  
    /// <summary>
    /// 获取港口时区
    /// </summary>
    /// <param name="airCode">港口三字码</param>
    /// <returns>时区</returns>
    public async Task<string> GetPortTimezone(string airCode)
    {
        var key = GetPortKey(airCode);
        var timezone = RedisHelper.Client.Get<string>(key);
        if (!string.IsNullOrEmpty(timezone))
        {
            return timezone;
        }
        
        var portTimezone = await GetTimezoneByPortCode(airCode);
        if (portTimezone == null!)
        {
            await RedisHelper.Client.SetAsync(key, string.Empty, TimeSpan.FromSeconds(20));
            return string.Empty;
        }

        await RedisHelper.Client.SetAsync(key, portTimezone.Timezone, TimeSpan.FromHours(6));
        return portTimezone.Timezone;
    }
    
    private Task<CityTimezoneDto> GetTimezoneByCityName(string cityEnName)
    {
        return Context.Queryable<VCityEntity>().Where(val => !val.IsDeleted && val.EnName == cityEnName)
            .Select(val=>new CityTimezoneDto()
            {
                CityEnName =val.EnName,
                Timezone = val.TimeZone
            })
            .FirstAsync();
    }

    private Task<PortTimezoneDto> GetTimezoneByPortCode(string airCode)
    {
        return Context.Queryable<VCityEntity>()
            .InnerJoin<VAirportEntity>((city, airport) => city.Id == airport.CityId)
            .Where((city,airport) => !airport.IsDeleted && !city.IsDeleted && airport.Code == airCode)
            .Select((city,airport)=>new PortTimezoneDto()
            {
                PortCode = airport.Code,
                Timezone = city.TimeZone
            })
            .FirstAsync();
    }
}