using Admin.NET.Plugin.AiDOP.Infrastructure.S8;
using Admin.NET.Plugin.AiDOP.Job;
using Microsoft.Extensions.Configuration;
using Xunit;

namespace Admin.NET.Plugin.AiDOP.Tests.S8;

/// <summary>
/// S8-P0-2-PER-JOB-KILL-SWITCH-1：三个 S8 后台 Job 的独立开关。
///
/// <para>修复前三个 Job 读**完全相同**的两个键，「只跑 Watch」在配置层不可表达。
/// 2026-09-02 受控启动时打开总开关同时放行了另外两个 Job，其中
/// <c>ActiveFlowStuckScan</c>（<c>RunOnStart = true</c>）在重启瞬间写入 499 行告警日志；
/// 当时唯一的隔离手段「先暂停 trigger 再重启」实测**跨重启不可靠**（两次结果相反）。</para>
///
/// <para>本测试用真实 <see cref="IConfiguration"/> 覆盖原 Prompt §九 的四组合真值表。
/// 这是 Gate 2 的代码侧证据；runtime 侧（重启后第一拍）留待统一窗口。</para>
/// </summary>
public class S8JobSwitchTests
{
    private static IConfiguration Config(bool? environmentEnabled, bool master, bool watch, bool timeout, bool stuck)
    {
        var dict = new Dictionary<string, string?>
        {
            ["S8:Scheduler:Enabled"] = master.ToString(),
            ["S8:WatchScheduler:Enabled"] = watch.ToString(),
            ["S8:TimeoutAutoEscalation:Enabled"] = timeout.ToString(),
            ["S8:ActiveFlowStuckScan:Enabled"] = stuck.ToString(),
        };
        if (environmentEnabled.HasValue) dict["Scheduler:Enabled"] = environmentEnabled.Value.ToString();
        return new ConfigurationBuilder().AddInMemoryCollection(dict).Build();
    }

    private static (bool Watch, bool Timeout, bool Stuck) Evaluate(IConfiguration cfg) => (
        S8JobSwitch.Evaluate(cfg, S8BackgroundJob.WatchScheduler).Enabled,
        S8JobSwitch.Evaluate(cfg, S8BackgroundJob.TimeoutAutoEscalation).Enabled,
        S8JobSwitch.Evaluate(cfg, S8BackgroundJob.ActiveFlowStuckScan).Enabled);

    // ───────────────────────── 原 Prompt §九 四组合 ─────────────────────────

    /// <summary>Case A：Master=false，三个 Job 各自 true → 三个都不运行。</summary>
    [Fact]
    public void CaseA_MasterOff_DisablesAllThreeJobs()
    {
        var (watch, timeout, stuck) = Evaluate(Config(true, master: false, watch: true, timeout: true, stuck: true));
        Assert.False(watch);
        Assert.False(timeout);
        Assert.False(stuck);
    }

    /// <summary>Case B：Master=true，只有 Watch=true → 只有 Watch 运行。</summary>
    [Fact]
    public void CaseB_OnlyWatchScheduler()
    {
        var (watch, timeout, stuck) = Evaluate(Config(true, master: true, watch: true, timeout: false, stuck: false));
        Assert.True(watch);
        Assert.False(timeout);
        Assert.False(stuck);
    }

    /// <summary>Case C：Master=true，只有 Timeout=true → 只有 Timeout 运行。</summary>
    [Fact]
    public void CaseC_OnlyTimeoutAutoEscalation()
    {
        var (watch, timeout, stuck) = Evaluate(Config(true, master: true, watch: false, timeout: true, stuck: false));
        Assert.False(watch);
        Assert.True(timeout);
        Assert.False(stuck);
    }

    /// <summary>Case D：Master=true，只有 Stuck=true → 只有 StuckScan 运行。</summary>
    [Fact]
    public void CaseD_OnlyActiveFlowStuckScan()
    {
        var (watch, timeout, stuck) = Evaluate(Config(true, master: true, watch: false, timeout: false, stuck: true));
        Assert.False(watch);
        Assert.False(timeout);
        Assert.True(stuck);
    }

    // ───────────────────────── 边界与默认 ─────────────────────────

    /// <summary>环境级 master kill switch 优先于一切：Scheduler:Enabled=false → 全停。</summary>
    [Fact]
    public void EnvironmentKillSwitch_OverridesEverything()
    {
        var (watch, timeout, stuck) = Evaluate(Config(false, master: true, watch: true, timeout: true, stuck: true));
        Assert.False(watch);
        Assert.False(timeout);
        Assert.False(stuck);
    }

    /// <summary>
    /// 单 Job 键缺省时必须为 false（fail-safe）：只配 Master=true 不足以让任何 Job 跑起来。
    /// 宁可「本该跑却没跑」也不要「本不该跑却跑了」。
    /// </summary>
    [Fact]
    public void MissingPerJobKey_DefaultsToDisabled()
    {
        var cfg = new ConfigurationBuilder().AddInMemoryCollection(new Dictionary<string, string?>
        {
            ["Scheduler:Enabled"] = "true",
            ["S8:Scheduler:Enabled"] = "true",
        }).Build();

        var (watch, timeout, stuck) = Evaluate(cfg);
        Assert.False(watch);
        Assert.False(timeout);
        Assert.False(stuck);
    }

    /// <summary>环境级键缺省为 true，保持既有部署语义不变。</summary>
    [Fact]
    public void MissingEnvironmentKey_DefaultsToEnabled()
    {
        var d = S8JobSwitch.Evaluate(
            Config(null, master: true, watch: true, timeout: false, stuck: false),
            S8BackgroundJob.WatchScheduler);
        Assert.True(d.EnvironmentEnabled);
        Assert.True(d.Enabled);
    }

    /// <summary>三级与的每一级都要能单独否决。</summary>
    [Theory]
    [InlineData(false, true, true, false)]
    [InlineData(true, false, true, false)]
    [InlineData(true, true, false, false)]
    [InlineData(true, true, true, true)]
    public void EffectiveIsConjunctionOfThreeLevels(bool env, bool master, bool own, bool expected)
    {
        var d = new S8JobSwitchDecision(env, master, own, null);
        Assert.Equal(expected, d.Enabled);
    }

    /// <summary>键名与 env 名固化，防止后续改名导致部署侧静默失配。</summary>
    [Theory]
    [InlineData(S8BackgroundJob.WatchScheduler, "S8:WatchScheduler:Enabled", "AIDOP_S8_WATCH_SCHEDULER_ENABLED")]
    [InlineData(S8BackgroundJob.TimeoutAutoEscalation, "S8:TimeoutAutoEscalation:Enabled", "AIDOP_S8_TIMEOUT_AUTO_ESCALATION_ENABLED")]
    [InlineData(S8BackgroundJob.ActiveFlowStuckScan, "S8:ActiveFlowStuckScan:Enabled", "AIDOP_S8_ACTIVE_FLOW_STUCK_SCAN_ENABLED")]
    public void ConfigKeysAndEnvNamesArePinned(S8BackgroundJob job, string key, string env)
    {
        Assert.Equal(key, S8JobSwitch.JobEnabledKey(job));
        Assert.Equal(env, S8JobSwitch.JobEnvName(job));
    }

    /// <summary>env 解析失败必须保留 JSON 值并回报 env 名（不吞、不静默改判）。</summary>
    [Fact]
    public void UnparsableEnvOverride_KeepsJsonValueAndReportsName()
    {
        var name = S8JobSwitch.JobEnvName(S8BackgroundJob.WatchScheduler);
        var original = Environment.GetEnvironmentVariable(name);
        try
        {
            Environment.SetEnvironmentVariable(name, "not-a-bool");
            var d = S8JobSwitch.Evaluate(
                Config(true, master: true, watch: true, timeout: false, stuck: false),
                S8BackgroundJob.WatchScheduler);

            Assert.True(d.JobEnabled);              // 沿用 JSON 的 true
            Assert.Equal(name, d.ParseFailEnvName); // 但必须回报解析失败
        }
        finally { Environment.SetEnvironmentVariable(name, original); }
    }

    // ───────────────────────── RunOnStart 硬门 ─────────────────────────

    /// <summary>
    /// <c>ActiveFlowStuckScan</c> 带 <c>RunOnStart = true</c>，启动瞬间必然触发一次；
    /// 因此三个 Job 的 <c>ExecuteAsync</c> 都必须**先求值开关再做任何事**。
    /// 断言：门禁调用出现在方法体内、且早于任何 <c>CreateScope()</c>（即拿 service 之前）。
    /// </summary>
    [Theory]
    [InlineData(typeof(S8WatchSchedulerJob), "Job/S8WatchSchedulerJob.cs")]
    [InlineData(typeof(S8TimeoutAutoEscalationJob), "Job/S8TimeoutAutoEscalationJob.cs")]
    [InlineData(typeof(S8ActiveFlowStuckScanJob), "Job/S8ActiveFlowStuckScanJob.cs")]
    public void Gate_IsEvaluatedBeforeAnyServiceResolution(Type jobType, string relativePath)
    {
        _ = jobType;
        var root = Path.GetFullPath(Path.Combine(AppContext.BaseDirectory, "../../../../Admin.NET.Plugin.AiDOP"));
        var full = Path.Combine(root, relativePath);
        Assert.True(File.Exists(full), $"源码文件不存在，路径需同步更新：{full}");

        var src = File.ReadAllText(full);
        var gateIdx = src.IndexOf("S8JobSwitch.Evaluate(_configuration", StringComparison.Ordinal);
        var scopeIdx = src.IndexOf("_scopeFactory.CreateScope()", StringComparison.Ordinal);

        Assert.True(gateIdx > 0, "未找到 S8JobSwitch 门禁调用");
        Assert.True(scopeIdx > 0, "未找到 CreateScope（Job 结构可能已变）");
        Assert.True(gateIdx < scopeIdx, "开关求值必须早于任何 service 解析 / 业务扫描");

        // 旧的双键写法必须彻底消失，避免有人只改一个 Job 造成三处漂移。
        Assert.DoesNotContain("GetValue(\"S8:Scheduler:Enabled\"", src);
        Assert.DoesNotContain("GetValue(\"Scheduler:Enabled\"", src);
    }
}