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
    }

    [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.Admin.PostAsync("/api/admin/releases", BackendFixture.Json(new JsonObject { ["manifest"] = manifest, ["signature"] = "MEUCIQDc" }));
        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
    }
}