using Admin.NET.Core;

namespace Admin.NET.Plugin.AiDOP.Infrastructure;

public sealed record SmartOpsTrustedScope(long TenantId, long FactoryId, long UserId);

/// <summary>
/// 智慧诊断与改善闭环的可信作用域：只信登录上下文，工厂由租户关系解析。
/// </summary>
public sealed class SmartOpsTrustedScopeResolver : ITransient
{
    public const long PlatformTenantId = SqlSugarConst.DefaultTenantId;

    private readonly ISqlSugarClient _db;
    private readonly UserManager _userManager;

    public SmartOpsTrustedScopeResolver(ISqlSugarClient db, UserManager userManager)
    {
        _db = db;
        _userManager = userManager;
    }

    public async Task<SmartOpsTrustedScope> ResolveAsync(long? candidateFactoryId = null)
    {
        var tenantId = AidopTenantScope.ResolveOrThrow(_userManager);
        SmartOpsTrustedScopeRules.EnsureBusinessTenant(tenantId);

        var orgId = await _db.Queryable<SysTenant>()
            .ClearFilter<ITenantIdFilter>()
            .Where(x => x.Id == tenantId)
            .Select(x => x.OrgId)
            .FirstAsync();

        var factoryId = SmartOpsTrustedScopeRules.ResolveFactory(tenantId, orgId, candidateFactoryId);
        var userId = _userManager.UserId;
        if (userId <= 0)
            throw Oops.Oh("无法确定当前用户，请重新登录");
        return new SmartOpsTrustedScope(tenantId, factoryId, userId);
    }
}

public static class SmartOpsTrustedScopeRules
{
    public const long PlatformTenantId = SqlSugarConst.DefaultTenantId;

    public static void EnsureBusinessTenant(long tenantId)
    {
        if (tenantId <= 0 || tenantId == 1 || tenantId == PlatformTenantId)
            throw new InvalidOperationException("平台租户不得作为业务事实作用域");
    }

    /// <summary>
    /// 客户端工厂只是筛选建议。未授权或不存在时回落到租户 OrgId，不得使用外租户工厂。
    /// </summary>
    public static long ResolveFactory(long tenantId, long orgId, long? candidateFactoryId)
    {
        if (orgId <= 0 || orgId == tenantId)
            throw new InvalidOperationException("当前租户未配置有效工厂");

        if (candidateFactoryId is > 0
            && candidateFactoryId.Value != tenantId
            && candidateFactoryId.Value == orgId)
            return candidateFactoryId.Value;

        return orgId;
    }

    public static bool IsAuthorizedFactory(long tenantId, long orgId, long factoryId) =>
        factoryId > 0 && factoryId != tenantId && factoryId == orgId;
}

public static class SmartOpsImprovementPlanNo
{
    public static string BuildPrefix(DateTime now) => $"SOP-{now:yyyyMMdd}-";

    public static string Next(string prefix, IEnumerable<string> existing)
    {
        var max = 0;
        foreach (var planNo in existing)
        {
            if (string.IsNullOrWhiteSpace(planNo) || !planNo.StartsWith(prefix, StringComparison.Ordinal))
                continue;
            if (int.TryParse(planNo.AsSpan(prefix.Length), out var n))
                max = Math.Max(max, n);
        }
        return $"{prefix}{max + 1:000}";
    }
}