using Admin.NET.Plugin.AiDOP.Service.S8;
using Furion.Schedule;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using System.Text.Json;

namespace Admin.NET.Plugin.AiDOP.Job;

/// <summary>
/// G-08：S8 自动监控主链定时调度作业。
/// 固定租户 / 工厂上下文下，按周期触发一次 G-01 主链（<see cref="S8WatchSchedulerService.CreateExceptionsAsync"/>）。
/// 本轮仅完成"正式定时触发接入"；不在调度层追加业务逻辑、不改写主链入参语义、不做真实 SQL / 认证链路 / SLA 治理。
/// 周期由 [Period] 属性固化为默认值（30 分钟）；运行期调整走 Admin.NET 作业管理，不走配置中心。
/// 开关：默认通过 Admin.NET 作业管理的触发器状态控制；本作业构造不自动启动。
/// </summary>
[JobDetail("job_s8_watch_scheduler", Description = "S8 自动监控主链定时调度",
    GroupName = "default", Concurrent = false)]
[Period(S8WatchSchedulerJob.IntervalMs, TriggerId = "trigger_s8_watch_scheduler", Description = "S8-SCHED-EXEC-1：DB 驱动派发，1 分钟节拍")]
public class S8WatchSchedulerJob : IJob
{
    private readonly IServiceScopeFactory _scopeFactory;
    private readonly ILogger _logger;

    // S8-SCHED-EXEC-1：节拍 5min → 1min；单规则节奏由 watch_rule.poll_interval_seconds + next_run_at 控制，
    // Job 仅做 tick；未到期规则在 PickReadyRulesAsync 阶段自然过滤。
    public const int IntervalMs = 60000;

    // 默认租户 / 工厂上下文。与 G-01 / S8-SCHED-SCHEMA-1 验收口径一致。
    private const long DefaultTenantId = 1;
    private const long DefaultFactoryId = 1;

    // 单 tick 最多抢锁规则数；规模上来后可下放到 appsettings。当前 dev 仅 3 条 demo，给 32 留余量。
    private const int BatchSize = 32;

    // 首次激活打印锚点。
    private static int _firstActivationLogged;

    public S8WatchSchedulerJob(
        IServiceScopeFactory scopeFactory,
        ILoggerFactory loggerFactory)
    {
        _scopeFactory = scopeFactory;
        _logger = loggerFactory.CreateLogger(nameof(S8WatchSchedulerJob));
    }

    public async Task ExecuteAsync(JobExecutingContext context, CancellationToken stoppingToken)
    {
        if (Interlocked.Exchange(ref _firstActivationLogged, 1) == 0)
        {
            _logger.LogInformation(
                "S8WatchSchedulerJob 首次激活：IntervalMs={IntervalMs} BatchSize={Batch} TenantId={Tenant} FactoryId={Factory} LockedBy={LockedBy}",
                IntervalMs, BatchSize, DefaultTenantId, DefaultFactoryId, BuildLockedBy());
        }

        var triggeredAt = DateTime.Now;
        using var scope = _scopeFactory.CreateScope();
        var scheduler = scope.ServiceProvider.GetRequiredService<S8WatchSchedulerService>();

        try
        {
            var lockedBy = BuildLockedBy();
            var summary = await scheduler.RunDispatchTickAsync(DefaultTenantId, DefaultFactoryId, BatchSize, lockedBy);
            _logger.LogInformation(BuildTraceLine(triggeredAt, "success", summary, null));
        }
        catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
        {
            _logger.LogInformation(BuildTraceLine(triggeredAt, "cancelled", null, null));
        }
        catch (Exception ex)
        {
            // RunDispatchTickAsync 内部已吞所有单规则异常；此处仅兜底。
            _logger.LogError(ex, BuildTraceLine(triggeredAt, "error", null, TruncateSummary(ex.Message)));
        }
    }

    private static string BuildLockedBy()
    {
        try
        {
            var pid = Environment.ProcessId;
            return $"{Environment.MachineName}-{pid}";
        }
        catch
        {
            return "unknown-host";
        }
    }

    // 单行 JSON 留痕：tick 维度 6 字段（触发时间 / 执行结果 / picked / created / refreshed / pending / failed / leaseReleased / runId）。
    private static string BuildTraceLine(
        DateTime triggeredAt, string result, S8DispatchTickResult? summary, string? failureSummary)
    {
        var payload = new
        {
            job = "S8WatchSchedulerJob",
            triggeredAt = triggeredAt.ToString("yyyy-MM-dd HH:mm:ss"),
            result,
            tickId = summary?.TickId,
            runId = summary?.RunId,
            picked = summary?.Picked ?? 0,
            success = summary?.Success ?? 0,
            ruleFailed = summary?.Failed ?? 0,
            created = summary?.Created ?? 0,
            refreshed = summary?.Refreshed ?? 0,
            pending = summary?.Pending ?? 0,
            perRuleFailed = summary?.PerRuleFailed ?? 0,
            leaseReleased = summary?.LeaseReleased ?? 0,
            failureSummary
        };
        return "S8WatchSchedulerJob 留痕 " + JsonSerializer.Serialize(payload);
    }

    private static string? TruncateSummary(string? raw)
    {
        if (string.IsNullOrWhiteSpace(raw)) return null;
        var oneLine = raw.Replace('\n', ' ').Replace('\r', ' ').Trim();
        return oneLine.Length <= 200 ? oneLine : oneLine[..200];
    }
}