using SPMS.Application.DTOs.AppConfig;
using SPMS.Application.Interfaces;
using SPMS.Domain.Common;
using SPMS.Domain.Exceptions;
using SPMS.Domain.Interfaces;

namespace SPMS.Application.Services;

public class AppConfigService : IAppConfigService
{
    private readonly IAppConfigRepository _appConfigRepository;
    private readonly IServiceRepository _serviceRepository;

    public AppConfigService(IAppConfigRepository appConfigRepository, IServiceRepository serviceRepository)
    {
        _appConfigRepository = appConfigRepository;
        _serviceRepository = serviceRepository;
    }

    public async Task<AppConfigResponseDto> GetTermsAsync(string serviceCode)
    {
        return await GetConfigUrlAsync(serviceCode, "terms_url");
    }

    public async Task<AppConfigResponseDto> GetPrivacyAsync(string serviceCode)
    {
        return await GetConfigUrlAsync(serviceCode, "privacy_url");
    }

    public async Task<AppVersionResponseDto> GetAppVersionAsync(string serviceCode, AppVersionRequestDto request)
    {
        var service = await _serviceRepository.GetByServiceCodeAsync(serviceCode);
        if (service == null)
            throw new SpmsException(ErrorCodes.NotFound, "존재하지 않는 서비스입니다.", 404);

        var latestVersion = await _appConfigRepository.GetByKeyAsync(service.Id, "latest_version");
        var minVersion = await _appConfigRepository.GetByKeyAsync(service.Id, "min_version");
        var forceUpdate = await _appConfigRepository.GetByKeyAsync(service.Id, "force_update");

        var updateUrlKey = request.Platform?.ToLowerInvariant() == "ios" ? "update_url_ios" : "update_url_android";
        var updateUrl = await _appConfigRepository.GetByKeyAsync(service.Id, updateUrlKey);

        return new AppVersionResponseDto
        {
            LatestVersion = latestVersion?.ConfigValue,
            MinVersion = minVersion?.ConfigValue,
            IsForceUpdate = string.Equals(forceUpdate?.ConfigValue, "true", StringComparison.OrdinalIgnoreCase),
            UpdateUrl = updateUrl?.ConfigValue
        };
    }

    private async Task<AppConfigResponseDto> GetConfigUrlAsync(string serviceCode, string configKey)
    {
        var service = await _serviceRepository.GetByServiceCodeAsync(serviceCode);
        if (service == null)
            throw new SpmsException(ErrorCodes.NotFound, "존재하지 않는 서비스입니다.", 404);

        var config = await _appConfigRepository.GetByKeyAsync(service.Id, configKey);

        return new AppConfigResponseDto
        {
            Url = config?.ConfigValue
        };
    }
}