using Fake.DependencyInjection;
using Microsoft.Extensions.Options;
using Oms.Domain.SystemAggregate.Consts;
using Oms.Domain.SystemAggregate.Entities;
using Oms.Domain.SystemAggregate.Repositories;

namespace Oms.Application.Integrations.PlatformShop;

/// <summary>
/// 平台店铺 OAuth 运行时配置：优先读「其他配置」，回退 appsettings。
/// </summary>
public interface IPlatformShopConfigProvider
{
    Task<PlatformShopOptions> GetAsync(CancellationToken cancellationToken = default);
}

internal sealed class PlatformShopConfigProvider(
    ISystemOtherConfigRepository repository,
    IOptions<PlatformShopOptions> options) : IPlatformShopConfigProvider, IScopedDependency
{
    public async Task<PlatformShopOptions> GetAsync(CancellationToken cancellationToken = default)
    {
        var fallback = options.Value ?? new PlatformShopOptions();
        var common = await repository.GetByConfigCodeAsync(SystemOtherConfigCodes.PlatformShop, cancellationToken);
        var lazada = await repository.GetByConfigCodeAsync(SystemOtherConfigCodes.PlatformShopLazada, cancellationToken);
        var shopee = await repository.GetByConfigCodeAsync(SystemOtherConfigCodes.PlatformShopShopee, cancellationToken);
        var tiktok = await repository.GetByConfigCodeAsync(SystemOtherConfigCodes.PlatformShopTiktok, cancellationToken);
        var temu = await repository.GetByConfigCodeAsync(SystemOtherConfigCodes.PlatformShopTemu, cancellationToken);

        return new PlatformShopOptions
        {
            FrontendBaseUrl = Coalesce(common?.BaseUrl, fallback.FrontendBaseUrl),
            StateSecret = Coalesce(common?.Remark, fallback.StateSecret),
            Lazada = MergeLazada(lazada, fallback.Lazada),
            Shopee = MergeShopee(shopee, fallback.Shopee),
            Tiktok = MergeTiktok(tiktok, fallback.Tiktok),
            Temu = MergeTemu(temu, fallback.Temu)
        };
    }

    private static LazadaPlatformOptions MergeLazada(SystemOtherConfig? entity, LazadaPlatformOptions fallback)
    {
        fallback ??= new LazadaPlatformOptions();
        if (entity == null || !entity.Enabled)
        {
            return CloneLazada(fallback);
        }

        return new LazadaPlatformOptions
        {
            AppKey = Coalesce(entity.AppKey, fallback.AppKey),
            AppSecret = Coalesce(entity.AppSecret, fallback.AppSecret),
            AuthorizeUrl = Coalesce(entity.BaseUrl, fallback.AuthorizeUrl),
            AccessTokenUrl = Coalesce(entity.Remark, fallback.AccessTokenUrl)
        };
    }

    private static ShopeePlatformOptions MergeShopee(SystemOtherConfig? entity, ShopeePlatformOptions fallback)
    {
        fallback ??= new ShopeePlatformOptions();
        if (entity == null || !entity.Enabled)
        {
            return CloneShopee(fallback);
        }

        var partnerId = fallback.PartnerId;
        if (int.TryParse(entity.AppKey?.Trim(), out var parsed) && parsed > 0)
        {
            partnerId = parsed;
        }

        return new ShopeePlatformOptions
        {
            PartnerId = partnerId,
            PartnerKey = Coalesce(entity.AppSecret, fallback.PartnerKey),
            HostAuthUrl = Coalesce(entity.BaseUrl, fallback.HostAuthUrl),
            HostUrl = Coalesce(entity.Remark, fallback.HostUrl)
        };
    }

    private static TiktokPlatformOptions MergeTiktok(SystemOtherConfig? entity, TiktokPlatformOptions fallback)
    {
        fallback ??= new TiktokPlatformOptions();
        if (entity == null || !entity.Enabled)
        {
            return CloneTiktok(fallback);
        }

        return new TiktokPlatformOptions
        {
            AppKey = Coalesce(entity.AppKey, fallback.AppKey),
            AppSecret = Coalesce(entity.AppSecret, fallback.AppSecret),
            HostAuth = Coalesce(entity.BaseUrl, fallback.HostAuth),
            HostApi = Coalesce(entity.Remark, fallback.HostApi)
        };
    }

    private static TemuPlatformOptions MergeTemu(SystemOtherConfig? entity, TemuPlatformOptions fallback)
    {
        fallback ??= new TemuPlatformOptions();
        if (entity == null || !entity.Enabled)
        {
            return CloneTemu(fallback);
        }

        return new TemuPlatformOptions
        {
            AppKey = Coalesce(entity.AppKey, fallback.AppKey),
            AppSecret = Coalesce(entity.AppSecret, fallback.AppSecret),
            HostAuthUrl = Coalesce(entity.BaseUrl, fallback.HostAuthUrl)
        };
    }

    private static LazadaPlatformOptions CloneLazada(LazadaPlatformOptions src) => new()
    {
        AppKey = src.AppKey,
        AppSecret = src.AppSecret,
        AuthorizeUrl = src.AuthorizeUrl,
        AccessTokenUrl = src.AccessTokenUrl
    };

    private static ShopeePlatformOptions CloneShopee(ShopeePlatformOptions src) => new()
    {
        PartnerId = src.PartnerId,
        PartnerKey = src.PartnerKey,
        HostUrl = src.HostUrl,
        HostAuthUrl = src.HostAuthUrl
    };

    private static TiktokPlatformOptions CloneTiktok(TiktokPlatformOptions src) => new()
    {
        AppKey = src.AppKey,
        AppSecret = src.AppSecret,
        HostAuth = src.HostAuth,
        HostApi = src.HostApi
    };

    private static TemuPlatformOptions CloneTemu(TemuPlatformOptions src) => new()
    {
        AppKey = src.AppKey,
        AppSecret = src.AppSecret,
        HostAuthUrl = src.HostAuthUrl
    };

    private static string Coalesce(string? primary, string? fallback) =>
        !string.IsNullOrWhiteSpace(primary) ? primary.Trim() : (fallback ?? string.Empty);
}