using System.Net;
using System.Text.Json.Nodes;

namespace MoShiro.Backend.Tests;

/// <summary>
/// 一行安装：Agent 和 Probe 共用同一份<b>静态</b>脚本（所有人拿到的字节都一样，所以哈希固定、可以先核对再执行），
/// 面板地址、角色、一次性代码都走命令里的环境变量；脚本再向面板取 CI 签名的发布清单来验证镜像。
/// </summary>
[Collection("probe-e2e")]
public sealed class InstallTests
{
    private readonly BackendFixture _backend;

    public InstallTests(BackendFixture backend)
    {
        _backend = backend;
    }

    private async Task<JsonNode> CreateAsync(string role)
    {
        using HttpResponseMessage response = await _backend.Admin.PostAsync("/api/admin/join-tokens", BackendFixture.Json(new JsonObject { ["role"] = role }));
        return JsonNode.Parse(await response.Content.ReadAsStringAsync())!;
    }

    [Theory]
    [InlineData("agent")]
    [InlineData("probe")]
    public async Task Commands_VerifyTheScriptHash_ThenRunItWithThePublicValues(string role)
    {
        JsonNode created = await CreateAsync(role);
        string code = created["plaintext"]!.GetValue<string>();
        JsonNode commands = created["install_commands"]!;
        string linux = commands["linux"]!.GetValue<string>();
        string macos = commands["macos"]!.GetValue<string>();
        string windows = commands["windows"]!.GetValue<string>();

        Assert.StartsWith("f=$(mktemp) && curl -fsSL '", linux, StringComparison.Ordinal);
        Assert.Contains("/install' -o \"$f\" && echo \"", linux, StringComparison.Ordinal);
        Assert.Contains("sha256sum -c -", linux, StringComparison.Ordinal);
        Assert.Contains($"MOSHIRO_ROLE='{role}'", linux, StringComparison.Ordinal);
        Assert.Contains($"MOSHIRO_CODE='{code}'", linux, StringComparison.Ordinal);
        Assert.EndsWith("sh \"$f\"", linux, StringComparison.Ordinal);
        Assert.Contains("shasum -a 256 -c -", macos, StringComparison.Ordinal);
        Assert.StartsWith("$f = Join-Path $env:TEMP", windows, StringComparison.Ordinal);
        Assert.Contains($"$env:MOSHIRO_ROLE='{role}'", windows, StringComparison.Ordinal);
        Assert.EndsWith("iex (Get-Content -Raw $f)", windows, StringComparison.Ordinal);
        Assert.DoesNotContain("<", linux + macos + windows, StringComparison.Ordinal); // 没有要用户自己替换的占位符
    }

    [Theory]
    [InlineData("agent")]
    [InlineData("probe")]
    public async Task ComposeInstall_WritesThePublicValuesToAnEnvFile_AndChecksTheComposeHash(string role)
    {
        JsonNode created = await CreateAsync(role);
        string code = created["plaintext"]!.GetValue<string>();
        JsonNode compose = created["compose"]!;
        string env = compose["env"]!.GetValue<string>();
        string url = compose["url"]!.GetValue<string>();
        string linux = compose["linux"]!.GetValue<string>();

        Assert.EndsWith($"/install/compose/{role}.yaml", url, StringComparison.Ordinal);
        Assert.Contains($"MOSHIRO_JOIN={code}", env, StringComparison.Ordinal);
        Assert.Contains("MOSHIRO_SERVER=", env, StringComparison.Ordinal);
        Assert.Contains($"/moshiro-{role}", env, StringComparison.Ordinal); // MOSHIRO_IMAGE：仓库和命名空间来自后端的配置，不是写死的
        Assert.StartsWith($"mkdir -p moshiro-{role} && cd moshiro-{role} && cat > .env <<'EOF'\n", linux, StringComparison.Ordinal);
        Assert.Contains(env, linux, StringComparison.Ordinal);
        Assert.Contains("chmod 600 .env", linux, StringComparison.Ordinal);
        Assert.Contains($"echo \"{compose["sha256"]!.GetValue<string>()}  compose.yaml\" | sha256sum -c -", linux, StringComparison.Ordinal);
        Assert.EndsWith("podman compose up -d", linux, StringComparison.Ordinal);

        // 面板提供的就是命令里核对的那份
        using HttpResponseMessage served = await _backend.Anonymous.GetAsync($"/install/compose/{role}.yaml");
        Assert.Equal(HttpStatusCode.OK, served.StatusCode);
        Assert.Equal("text/yaml", served.Content.Headers.ContentType?.MediaType);
        byte[] body = await served.Content.ReadAsByteArrayAsync();
        Assert.Equal(compose["sha256"]!.GetValue<string>(), Convert.ToHexStringLower(System.Security.Cryptography.SHA256.HashData(body)));

        if (role == "probe")
        {
            // Docker Desktop 没有宿主网络：macOS 和 Windows 的 .env 里改成 bridge
            string macos = compose["macos"]!.GetValue<string>();
            string windows = compose["windows"]!.GetValue<string>();
            Assert.Contains("MOSHIRO_NETWORK_MODE=bridge", macos + windows, StringComparison.Ordinal);
            Assert.Contains("docker compose up -d", macos, StringComparison.Ordinal);
            Assert.Contains("Get-FileHash compose.yaml", windows, StringComparison.Ordinal);
        }
        else
        {
            // Agent 需要 Linux 的宿主网络
            Assert.Equal(string.Empty, compose["macos"]!.GetValue<string>());
            Assert.Equal(string.Empty, compose["windows"]!.GetValue<string>());
        }
    }

    [Theory]
    [InlineData("agent")]
    [InlineData("probe")]
    public async Task QuadletInstall_ChecksTheUnitHash_PointsTheImageAtTheConfiguredRepository_AndLeavesAutoUpdateOn(string role)
    {
        JsonNode created = await CreateAsync(role);
        JsonNode quadlet = created["quadlet"]!;
        string env = quadlet["env"]!.GetValue<string>();
        string command = quadlet["command"]!.GetValue<string>();
        string url = quadlet["url"]!.GetValue<string>();

        Assert.EndsWith($"/install/quadlet/{role}.container", url, StringComparison.Ordinal);
        Assert.Contains($"MOSHIRO_JOIN={created["plaintext"]!.GetValue<string>()}", env, StringComparison.Ordinal);
        Assert.Contains("# MOSHIRO_UPDATE_POLICY=manual", env, StringComparison.Ordinal); // 默认自动更新，env 里只留一行注释说明怎么改成手动
        Assert.DoesNotContain("\nMOSHIRO_UPDATE_POLICY=", env, StringComparison.Ordinal);
        Assert.Contains($"~/.config/moshiro/{role}.env", command, StringComparison.Ordinal);
        Assert.Contains("chmod 600", command, StringComparison.Ordinal);
        Assert.Contains($"echo \"{quadlet["sha256"]!.GetValue<string>()}  $HOME/.config/containers/systemd/moshiro-{role}.container\" | sha256sum -c -", command, StringComparison.Ordinal);
        Assert.Contains($"Image=", command, StringComparison.Ordinal);
        Assert.Contains($"/moshiro-{role}:latest", command, StringComparison.Ordinal);
        Assert.EndsWith($"systemctl --user daemon-reload && systemctl --user start moshiro-{role}", command, StringComparison.Ordinal);

        // 面板提供的就是命令里核对的那份：Pull=always（退出再被拉起就是更新），并告诉节点外面会重新拉取
        using HttpResponseMessage served = await _backend.Anonymous.GetAsync($"/install/quadlet/{role}.container");
        Assert.Equal(HttpStatusCode.OK, served.StatusCode);
        byte[] body = await served.Content.ReadAsByteArrayAsync();
        Assert.Equal(quadlet["sha256"]!.GetValue<string>(), Convert.ToHexStringLower(System.Security.Cryptography.SHA256.HashData(body)));
        string unit = System.Text.Encoding.UTF8.GetString(body);
        Assert.Contains("\nPull=always", unit, StringComparison.Ordinal);
        Assert.Contains("Environment=MOSHIRO_UPDATE=restart", unit, StringComparison.Ordinal);
        Assert.Contains("ReadOnly=true", unit, StringComparison.Ordinal);
        Assert.Contains("DropCapability=ALL", unit, StringComparison.Ordinal);
        Assert.Contains("NoNewPrivileges=true", unit, StringComparison.Ordinal);
        Assert.DoesNotContain("jt_", unit, StringComparison.Ordinal);
    }

    [Theory]
    [InlineData("evil.container")]
    [InlineData("backend.container")]
    [InlineData("agent")]
    public async Task OnlyTheTwoQuadletUnits_AreServed(string file)
    {
        using HttpResponseMessage response = await _backend.Anonymous.GetAsync("/install/quadlet/" + file);

        Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
    }

    [Theory]
    [InlineData("agent.yaml")]
    [InlineData("probe.yaml")]
    [InlineData("backend.yaml")]
    public async Task TheComposeFiles_AreStatic_PinNothingToABuild_AndKeepTheNodeHardening(string file)
    {
        string body = await _backend.Anonymous.GetStringAsync("/install/compose/" + file);

        Assert.Contains("${MOSHIRO_VERSION:-latest}", body, StringComparison.Ordinal); // 更新就是 pull 加 up，想固定版本在 .env 里写
        Assert.Contains("read_only: true", body, StringComparison.Ordinal);
        Assert.Contains("no-new-privileges:true", body, StringComparison.Ordinal);
        Assert.Contains("- ALL", body, StringComparison.Ordinal); // cap_drop
        Assert.DoesNotContain("jt_", body, StringComparison.Ordinal); // 没有任何一次性的值
        // 参数只从 .env 原样传进容器：podman-compose 不替换环境变量里的默认值，写成 ${变量:-默认值} 会把字面量传给节点
        Assert.Contains("env_file:", body, StringComparison.Ordinal);
        Assert.DoesNotContain(":-}", body, StringComparison.Ordinal);
    }

    [Theory]
    [InlineData("evil.yaml")]
    [InlineData("agent")]
    [InlineData("..%2Finstall.sh")]
    public async Task OnlyTheThreeComposeFiles_AreServed(string file)
    {
        using HttpResponseMessage response = await _backend.Anonymous.GetAsync("/install/compose/" + file);

        Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
    }

    [Fact]
    public async Task TheScripts_AreStatic_TheSameBytesForEveryone_AndNeedNoCode()
    {
        foreach (string path in new[] { "/install", "/install.sh", "/install.ps1" })
        {
            using HttpResponseMessage first = await _backend.Anonymous.GetAsync(path);
            using HttpResponseMessage second = await _backend.Anonymous.GetAsync(path + "?code=jt_whatever");
            Assert.Equal(HttpStatusCode.OK, first.StatusCode);
            Assert.Equal("no-store", first.Headers.CacheControl?.ToString());
            string body = await first.Content.ReadAsStringAsync();
            Assert.Equal(body, await second.Content.ReadAsStringAsync()); // 带不带码、带什么码，内容都一样
            Assert.DoesNotContain("@@", body, StringComparison.Ordinal);
            Assert.Contains("MOSHIRO_SERVER", body, StringComparison.Ordinal);
            Assert.Contains("MOSHIRO_ROLE", body, StringComparison.Ordinal);
            Assert.Contains("MOSHIRO_CODE", body, StringComparison.Ordinal);
        }

        // 同一份字节：sh 的两个路径一致
        Assert.Equal(await _backend.Anonymous.GetStringAsync("/install"), await _backend.Anonymous.GetStringAsync("/install.sh"));
    }

    [Fact]
    public async Task TheScripts_CarryTheReleaseKey_ThatTheBackendShips()
    {
        string key = MoShiro.Backend.Api.InstallScripts.ReleaseKey();
        Assert.StartsWith("-----BEGIN PUBLIC KEY-----", key, StringComparison.Ordinal);
        foreach (string path in new[] { "/install", "/install.ps1" })
        {
            string script = (await _backend.Anonymous.GetStringAsync(path)).Replace("\r\n", "\n", StringComparison.Ordinal);
            Assert.Contains(key.Replace("\r\n", "\n", StringComparison.Ordinal), script, StringComparison.Ordinal); // 脚本里内置的和面板发布的是同一把
        }
    }

    [Fact]
    public async Task TheScript_GetsTheSignedManifestOfItsRole_ByteForByte()
    {
        string manifest = """{"schema":1,"component":"probe","channel":"dev","image":"registry.example/moshiro-dev/moshiro-probe","digest":"sha256:0000000000000000000000000000000000000000000000000000000000000000","tag":"dev-1","version":"0.1.1","commit":"abc","built_at":"2026-10-06T00:00:00Z","seq":1}""";
        using HttpResponseMessage published = await _backend.Anonymous.PostAsync("/api/release/offer", BackendFixture.Json(new JsonObject { ["manifest"] = manifest, ["signature"] = TestReleaseKey.Sign(manifest) }));
        Assert.True(published.StatusCode is HttpStatusCode.Created or HttpStatusCode.Conflict, await published.Content.ReadAsStringAsync());

        string code = (await CreateAsync("probe"))["plaintext"]!.GetValue<string>();
        using HttpResponseMessage served = await _backend.Anonymous.GetAsync("/install/manifest?code=" + code);
        Assert.Equal(HttpStatusCode.OK, served.StatusCode);
        Assert.Equal("no-store", served.Headers.CacheControl?.ToString());
        Assert.Contains("\"component\":\"probe\"", await served.Content.ReadAsStringAsync(), StringComparison.Ordinal); // 签名对象是原始字节，面板一个字节也不改
        using HttpResponseMessage signature = await _backend.Anonymous.GetAsync("/install/manifest.sig?code=" + code);
        Assert.Equal(HttpStatusCode.OK, signature.StatusCode);
        Assert.False(string.IsNullOrWhiteSpace(await signature.Content.ReadAsStringAsync()));
    }

    [Fact]
    public async Task TheManifest_IsNotServedForUnknownRevokedOrUsedUpCodes()
    {
        foreach (string path in new[] { "/install/manifest", "/install/manifest?code=", "/install/manifest?code=jt_nope", "/install/manifest.sig?code=jt_nope" })
        {
            using HttpResponseMessage response = await _backend.Anonymous.GetAsync(path);
            Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
        }

        JsonNode revoked = await CreateAsync("probe");
        using HttpResponseMessage delete = await _backend.Admin.DeleteAsync("/api/admin/join-tokens/" + revoked["token"]!["id"]!.GetValue<string>());
        Assert.True(delete.IsSuccessStatusCode);
        using HttpResponseMessage gone = await _backend.Anonymous.GetAsync("/install/manifest?code=" + revoked["plaintext"]!.GetValue<string>());
        Assert.Equal(HttpStatusCode.NotFound, gone.StatusCode);

        // 用完了（一次性令牌已经注册过一个节点）：脚本在动手之前就能从这里知道，给出明确的提示
        JsonNode used = await CreateAsync("probe");
        string code = used["plaintext"]!.GetValue<string>();
        await using (await MoShiro.TestSupport.AgentSimulator.EnrollAsync(_backend.Anonymous, code, _backend.UniqueName("used"))) { }
        using HttpResponseMessage after = await _backend.Anonymous.GetAsync("/install/manifest?code=" + code);
        Assert.Equal(HttpStatusCode.NotFound, after.StatusCode);
    }

    [Fact]
    public async Task Codes_RecordWhoCreatedThem()
    {
        JsonNode created = await CreateAsync("agent");
        Assert.StartsWith("key:", created["token"]!["created_by"]!.GetValue<string>(), StringComparison.Ordinal); // Admin 客户端是 API key
    }
}