using Microsoft.Playwright;
using ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests.Cluster;

namespace ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests.Transport;

/// <summary>
/// Happy-path end-to-end for the Transport Export wizard (Component #24, Task T21).
///
/// <para>
/// Drives the full four-step wizard at <c>/design/transport/export</c> against the
/// running dev cluster, exporting a single throwaway template the test creates via
/// the CLI:
/// </para>
/// <list type="number">
///   <item>Step 1 — Select : filter to the zztest template and tick its checkbox.</item>
///   <item>Step 2 — Review : confirm the resolved closure (Next).</item>
///   <item>Step 3 — Encrypt: supply a matching passphrase (≥ 8 chars) and Export.</item>
///   <item>Step 4 — Download: assert the success summary.</item>
/// </list>
///
/// <para>
/// Step 1's template list is a <c>TemplateFolderTree</c> in checkbox mode. The inner
/// <c>TreeView</c> renders an <c>&lt;input type="checkbox" class="tv-checkbox"&gt;</c>
/// per node and the name in a sibling <c>span.tv-label</c>; there is no
/// <c>&lt;label for&gt;</c> association, and in checkbox mode clicking the label text
/// does NOT toggle the box (content-click only selects in Single mode). So the test
/// clicks the checkbox <c>input</c> itself, scoped to the row carrying the template's
/// label text.
/// </para>
///
/// <para>
/// Step 4's download is a JS-interop blob stream (NOT a DOM <c>&lt;a download&gt;</c>),
/// so the test asserts the success DOM (<c>[data-testid='download-summary']</c>) rather
/// than waiting for a Playwright download event — which would hang, since no
/// browser-level download fires.
/// </para>
/// </summary>
[Collection("Playwright")]
public sealed class TransportExportTests
{
    private readonly PlaywrightFixture _fixture;

    public TransportExportTests(PlaywrightFixture fixture)
    {
        _fixture = fixture;
    }

    [SkippableFact]
    public async Task ExportTemplate_ReachesDownloadSummary()
    {
        Skip.IfNot(await ClusterAvailability.IsAvailableAsync(), ClusterAvailability.SkipReason);

        var tmplName = CliRunner.UniqueName("exptmpl");
        var tmplId = await CliRunner.CreateTemplateAsync(tmplName);
        await CliRunner.AddAttributeAsync(tmplId, "Value", "Double");
        try
        {
            var page = await _fixture.NewAuthenticatedPageAsync("multi-role", "password");
            await page.GotoAsync($"{PlaywrightFixture.BaseUrl}/design/transport/export");
            // Wait for Step-1 to render (OnInitializedAsync makes 8 repo calls over SignalR
            // before the template tree appears — NetworkIdle is an unreliable proxy for this).
            await Assertions.Expect(page.Locator("[data-testid='group-templates']"))
                .ToBeVisibleAsync(new() { Timeout = 15_000 });

            // ── STEP 1: Select ────────────────────────────────────────────────────────
            // Narrow the tree to just the zztest template, then tick its checkbox.
            await page.Locator("#export-filter").FillAsync(tmplName);

            // The template node is a TreeView leaf row: a checkbox input plus a
            // span.tv-label carrying the name. Clicking the label text is a no-op in
            // checkbox mode, so we click the input directly, scoped to the row whose
            // label matches the unique zztest name.
            var templateCheckbox = page
                .Locator("[data-testid='group-templates'] li")
                .Filter(new() { Has = page.Locator($"span.tv-label:text-is('{tmplName}')") })
                .Locator("input.tv-checkbox")
                .First;
            await Assertions.Expect(templateCheckbox).ToBeVisibleAsync(new() { Timeout = 10_000 });
            await templateCheckbox.CheckAsync();

            // Next enables only once a selection exists; clicking it resolves the closure.
            var step1Next = page.Locator("button.btn.btn-primary:has-text('Next')");
            await Assertions.Expect(step1Next).ToBeEnabledAsync(new() { Timeout = 10_000 });
            await step1Next.ClickAsync();

            // ── STEP 2: Review ────────────────────────────────────────────────────────
            // The seed group lists the picked template; Next is always enabled here.
            // Scope the Next click to the Step-2 panel — identified by its unique
            // #include-deps toggle — so it cannot accidentally match a Step-1 button.
            await Assertions.Expect(page.Locator("[data-testid='seed-group']"))
                .ToBeVisibleAsync(new() { Timeout = 15_000 });
            await page.Locator("div:has(#include-deps) button.btn.btn-primary:has-text('Next')")
                .ClickAsync();

            // ── STEP 3: Encrypt ───────────────────────────────────────────────────────
            const string passphrase = "zztest-passphrase-123";
            await Assertions.Expect(page.Locator("#passphrase"))
                .ToBeVisibleAsync(new() { Timeout = 10_000 });
            await page.Locator("#passphrase").FillAsync(passphrase);
            await page.Locator("#passphrase-confirm").FillAsync(passphrase);

            // Export enables only when the two passphrases match AND length ≥ 8.
            var exportBtn = page.Locator("button.btn.btn-primary:has-text('Export')");
            await Assertions.Expect(exportBtn).ToBeEnabledAsync(new() { Timeout = 10_000 });
            await exportBtn.ClickAsync();

            // ── STEP 4: Download ──────────────────────────────────────────────────────
            // JS-interop blob download — assert the success DOM, never WaitForDownload.
            var summary = page.Locator("[data-testid='download-summary']");
            await Assertions.Expect(summary).ToBeVisibleAsync(new() { Timeout = 20_000 });
            await Assertions.Expect(summary).ToContainTextAsync("Bundle ready");
        }
        finally
        {
            await CliRunner.DeleteTemplateAsync(tmplId);
        }
    }
}