#Requires -Version 5.1
<#
.SYNOPSIS
    E2E test for §3.3 In-VM Git Clone feature.

.DESCRIPTION
    Runs nsis-plugin-nsinnounp build twice:
    1. Without -UseGitClone (baseline: host-side zip-transfer)
    2. With -UseGitClone (target: guest-side git clone)

    Measures elapsed time, artifact size, and logs comparison.
    Prerequisite: Template VM must have Git for Windows installed (§6.6).

.PARAMETER BaselineJobId
    Job ID for baseline run (host-side clone).
    Default: e2e-baseline-<yyyyMMdd_HHmmss>

.PARAMETER GuestCloneJobId
    Job ID for guest-side clone run.
    Default: e2e-guestclone-<yyyyMMdd_HHmmss>

.PARAMETER Branch
    Branch to build. Default: main

.PARAMETER TemplatePath
    Path to template VMX. Default: env:GITEA_CI_TEMPLATE_PATH or
    F:\CI\Templates\WinBuild2025\WinBuild2025.vmx

.PARAMETER GuestRepoUrl
    HTTP(S) URL for guest-side clone. Must be reachable from inside the VM.
    Default: https://gitea.emulab.it/Simone/nsis-plugin-nsinnounp.git
    NOTE: ssh://gitea-ci alias works only on the host (SSH config), not inside the VM.

.PARAMETER SkipBaseline
    If set, skip baseline run and only run with -UseGitClone.

.PARAMETER SkipGuestClone
    If set, skip guest-clone run and only run baseline.

.EXAMPLE
    # Full comparison (both runs):
    .\Test-E2E-Section3.3.ps1

    # Only test guest-clone mode (assume baseline already exists):
    .\Test-E2E-Section3.3.ps1 -SkipBaseline

    # Only test baseline:
    .\Test-E2E-Section3.3.ps1 -SkipGuestClone
#>
[CmdletBinding()]
param(
    [string] $BaselineJobId   = "e2e-baseline-$(Get-Date -Format 'yyyyMMdd_HHmmss')",
    [string] $GuestCloneJobId = "e2e-guestclone-$(Get-Date -Format 'yyyyMMdd_HHmmss')",
    [string] $Branch          = 'main',
    [string] $TemplatePath    = $(
        if ($env:GITEA_CI_TEMPLATE_PATH) { $env:GITEA_CI_TEMPLATE_PATH }
        else { 'F:\CI\Templates\WinBuild2025\WinBuild2025.vmx' }
    ),
    # URL for host-side clone (SSH alias works on host)
    [string] $HostRepoUrl     = 'ssh://gitea-ci/Simone/nsis-plugin-nsinnounp.git',
    # URL for guest-side clone (must be HTTP reachable from inside VM — SSH alias not available in guest)
    [string] $GuestRepoUrl    = 'https://gitea.emulab.it/Simone/nsis-plugin-nsinnounp.git',
    [switch] $SkipBaseline,
    [switch] $SkipGuestClone
)

Set-StrictMode -Version Latest
$ErrorActionPreference = 'Stop'

$scriptDir    = Split-Path $MyInvocation.MyCommand.Path -Parent
$orchestrator = Join-Path $scriptDir 'Invoke-CIJob.ps1'

# Common parameters (RepoUrl set per-mode below)
$commonParams = @{
    Branch               = $Branch
    TemplatePath         = $TemplatePath
    Submodules           = $true
    BuildCommand         = 'python build_plugin.py --final --dist-dir dist'
    GuestArtifactSource  = 'dist'
    GuestCredentialTarget = 'BuildVMGuest'
}

function Format-Elapsed {
    param([TimeSpan] $ts)
    if ($ts.TotalHours -ge 1) {
        return $ts.ToString('hh\:mm\:ss')
    } else {
        return $ts.ToString('mm\:ss\.ff')
    }
}

function Run-Test {
    param(
        [string] $JobId,
        [string] $Mode,
        [switch] $UseGitClone,
        [hashtable] $CommonParams
    )

    Write-Host ""
    Write-Host "────────────────────────────────────────────────────────" -ForegroundColor Cyan
    Write-Host " $Mode" -ForegroundColor Cyan
    Write-Host "────────────────────────────────────────────────────────" -ForegroundColor Cyan
    Write-Host " JobId  : $JobId"
    Write-Host " Branch : $Branch"
    Write-Host " Mode   : $(if ($UseGitClone) { 'Guest-side clone (-UseGitClone)' } else { 'Host-side zip-transfer (baseline)' })"
    Write-Host ""

    $params = $CommonParams.Clone()
    $params['JobId'] = $JobId
    if ($UseGitClone) {
        $params['UseGitClone'] = $true
        $params['RepoUrl']     = $script:GuestRepoUrl   # HTTP URL reachable from inside VM
    } else {
        $params['RepoUrl']     = $script:HostRepoUrl    # SSH alias — works on host
    }

    $startTime = Get-Date
    $exitCode  = 0

    try {
        # Pipe to Out-Host so orchestrator output doesn't pollute this function's pipeline
        & $orchestrator @params | Out-Host
        $exitCode = $LASTEXITCODE
    }
    catch {
        Write-Host "[Test] Orchestrator threw: $_" -ForegroundColor Red
        $exitCode = 1
    }

    $elapsed = (Get-Date) - $startTime

    if ($exitCode -ne 0) {
        Write-Host "[Test] FAIL — exit code $exitCode after $(Format-Elapsed $elapsed)" -ForegroundColor Red
        return @{ Success = $false; Elapsed = $elapsed; JobId = $JobId; Mode = $Mode }
    }

    $artifactDir = "F:\CI\Artifacts\$JobId"
    $artifactZip = Join-Path $artifactDir 'artifacts.zip'

    if (-not (Test-Path $artifactZip)) {
        Write-Host "[Test] FAIL — artifact not found: $artifactZip" -ForegroundColor Red
        return @{ Success = $false; Elapsed = $elapsed; JobId = $JobId; Mode = $Mode }
    }

    $zipSize = [math]::Round((Get-Item $artifactZip).Length / 1MB, 2)
    Write-Host "[Test] PASS — $(Format-Elapsed $elapsed)" -ForegroundColor Green
    Write-Host "       Artifact: $zipSize MB"
    Write-Host "       Logs    : $artifactDir"

    return @{ Success = $true; Elapsed = $elapsed; Size = $zipSize; JobId = $JobId; Mode = $Mode }
}

# ────────────────────────────────────────────────────────────────────────────
# Test runs
# ────────────────────────────────────────────────────────────────────────────

Write-Host ""
Write-Host "╔════════════════════════════════════════════════════════╗" -ForegroundColor Yellow
Write-Host "║  §3.3 E2E Test: In-VM Git Clone vs Host-side Zip       ║" -ForegroundColor Yellow
Write-Host "╚════════════════════════════════════════════════════════╝" -ForegroundColor Yellow

$baselineResult = $null
$guestCloneResult = $null

if (-not $SkipBaseline) {
    $baselineResult = Run-Test -JobId $BaselineJobId -Mode "BASELINE (host-side zip)" -CommonParams $commonParams
}

if (-not $SkipGuestClone) {
    $guestCloneResult = Run-Test -JobId $GuestCloneJobId -Mode "GUEST CLONE (-UseGitClone)" -UseGitClone -CommonParams $commonParams
}

# ────────────────────────────────────────────────────────────────────────────
# Summary
# ────────────────────────────────────────────────────────────────────────────

Write-Host ""
Write-Host "════════════════════════════════════════════════════════" -ForegroundColor Cyan
Write-Host " SUMMARY" -ForegroundColor Cyan
Write-Host "════════════════════════════════════════════════════════" -ForegroundColor Cyan

if ($baselineResult -and $guestCloneResult) {
    if ($baselineResult.Success -and $guestCloneResult.Success) {
        $baselineTime = $baselineResult.Elapsed.TotalSeconds
        $guestTime    = $guestCloneResult.Elapsed.TotalSeconds
        $diff         = $baselineTime - $guestTime
        $pctChange    = [math]::Round(($diff / $baselineTime) * 100, 1)

        Write-Host ""
        Write-Host "Baseline (host-side):     $(Format-Elapsed $baselineResult.Elapsed) / $($baselineResult.Size) MB"
        Write-Host "Guest clone (-UseGit):    $(Format-Elapsed $guestCloneResult.Elapsed) / $($guestCloneResult.Size) MB"
        Write-Host ""
        Write-Host "Difference:               $([math]::Round($diff, 1)) sec ($pctChange%)" -ForegroundColor $(if ($diff -gt 0) { 'Green' } else { 'Red' })
        Write-Host ""

        if ($diff -gt 0) {
            Write-Host "✓ §3.3 guest-clone is FASTER by $(Format-Elapsed ([TimeSpan]::FromSeconds($diff)))" -ForegroundColor Green
        }
        else {
            Write-Host "[WARN] Host-side is faster by $(Format-Elapsed ([TimeSpan]::FromSeconds(-$diff)))" -ForegroundColor Yellow
        }
    }
    else {
        Write-Host ""
        Write-Host "One or both tests failed. Review logs above." -ForegroundColor Red
        Write-Host ""
        if ($baselineResult.Success) {
            Write-Host "  Baseline: ✓ PASS"
        }
        else {
            Write-Host "  Baseline: ✗ FAIL"
        }
        if ($guestCloneResult.Success) {
            Write-Host "  Guest:    ✓ PASS"
        }
        else {
            Write-Host "  Guest:    ✗ FAIL"
        }
    }
}
elseif ($baselineResult) {
    Write-Host ""
    Write-Host "Baseline (host-side): $(if ($baselineResult.Success) { '✓ PASS' } else { '✗ FAIL' })" -ForegroundColor $(if ($baselineResult.Success) { 'Green' } else { 'Red' })
    if ($baselineResult.Success) {
        Write-Host "  Time: $(Format-Elapsed $baselineResult.Elapsed)"
    }
}
elseif ($guestCloneResult) {
    Write-Host ""
    Write-Host "Guest clone (-UseGit): $(if ($guestCloneResult.Success) { '✓ PASS' } else { '✗ FAIL' })" -ForegroundColor $(if ($guestCloneResult.Success) { 'Green' } else { 'Red' })
    if ($guestCloneResult.Success) {
        Write-Host "  Time: $(Format-Elapsed $guestCloneResult.Elapsed)"
    }
}

Write-Host ""
Write-Host "Logs: F:\CI\Logs\$BaselineJobId or $GuestCloneJobId" -ForegroundColor Gray
Write-Host "════════════════════════════════════════════════════════" -ForegroundColor Cyan