param(
    [Parameter(Mandatory)][ValidateSet('EditMode','PlayMode','AndroidBuild','AndroidSmoke')][string]$Phase,
    [ValidateSet('FirstSlice','Composition','Persistence','Content','Final')][string]$Milestone = 'Final'
)
$ErrorActionPreference = 'Stop'
$projectRoot = Split-Path $PSScriptRoot -Parent
Set-Location -LiteralPath $projectRoot
$evidenceDir = Join-Path $projectRoot "artifacts/verification/$Milestone"
New-Item -ItemType Directory -Path $evidenceDir -Force | Out-Null
$phaseName = $Phase.ToLowerInvariant()
$logPath = Join-Path $evidenceDir "$phaseName.log"
$record = [ordered]@{
    phase = $Phase; milestone = $Milestone; startedUtc = [DateTime]::UtcNow.ToString('o')
    sourceCommit = (& git rev-parse HEAD); sourceDirty = [bool](& git status --porcelain)
    command = $null; exitCode = $null; status = 'not-run'; log = $logPath
}
try {
    $record.editor = (Get-Content 'ProjectSettings/ProjectVersion.txt' | Select-String '^m_EditorVersion:').ToString().Split(':',2)[1].Trim()
    $record.packages = (Get-Content 'Packages/manifest.json' -Raw | ConvertFrom-Json).dependencies
    $apkPath = Join-Path $projectRoot "artifacts/android/$Milestone/MagnetismHeroes.apk"
    if ($Phase -in @('EditMode','PlayMode')) {
        $xmlPath = Join-Path $evidenceDir "$phaseName.xml"
        if (Test-Path -LiteralPath $xmlPath) { Remove-Item -LiteralPath $xmlPath }
        $cliArgs = @('test', $projectRoot, '--mode', $Phase, '--output', $xmlPath, '--timeout', '900', '--', '-logFile', $logPath)
        $record.command = 'unity ' + (($cliArgs | ForEach-Object { '"' + $_ + '"' }) -join ' ')
        & unity @cliArgs
        $record.exitCode = $LASTEXITCODE
        if (!(Test-Path -LiteralPath $xmlPath)) { throw "Unity $Phase exited $($record.exitCode) without a test report. See $logPath" }
        [xml]$report = Get-Content -LiteralPath $xmlPath -Raw
        $cases = @($report.SelectNodes('//test-case'))
        $record.total = $cases.Count
        $record.passed = @($cases | Where-Object { $_.result -eq 'Passed' }).Count
        $record.failed = @($cases | Where-Object { $_.result -eq 'Failed' }).Count
        $record.notPassed = $record.total - $record.passed
        if ($record.exitCode -ne 0) { throw "Unity $Phase exited $($record.exitCode). See $logPath" }
        if ($record.total -eq 0 -or $record.notPassed -ne 0) { throw "Test report contains $($record.total) tests and $($record.notPassed) non-passing cases." }
    } elseif ($Phase -eq 'AndroidBuild') {
        New-Item -ItemType Directory -Path (Split-Path $apkPath -Parent) -Force | Out-Null
        if (Test-Path -LiteralPath $apkPath) { Remove-Item -LiteralPath $apkPath }
        $env:MAGNETISM_APK_PATH = $apkPath
        $cliArgs = @('run', $projectRoot, '--timeout', '1800', '--log-file', $logPath, '--no-tail', '--', '-buildTarget', 'Android', '-executeMethod', 'MagnetismHeroes.Editor.ProjectBootstrap.BuildAndroid')
        $record.command = 'unity ' + (($cliArgs | ForEach-Object { '"' + $_ + '"' }) -join ' ')
        & unity @cliArgs
        $record.exitCode = $LASTEXITCODE
        if ($LASTEXITCODE -ne 0 -or !(Test-Path -LiteralPath $apkPath)) { throw 'Android build failed or produced no APK.' }
        $record.apk = $apkPath
        $record.apkSha256 = (Get-FileHash -LiteralPath $apkPath -Algorithm SHA256).Hash
        & (Join-Path $PSScriptRoot 'android/inspect-apk.ps1') -ApkPath $apkPath -EvidenceDir $evidenceDir -SourceCommit $record.sourceCommit -SourceDirty $record.sourceDirty -MetadataName 'apk-metadata.json'
        $record.apkMetadata = Join-Path $evidenceDir 'apk-metadata.json'
        # Unity rewrites these files with LF; restore only when Git proves their content is unchanged.
        $record.normalizedUnchangedSettings = @()
        $record.settingsContentChecks = @()
        if (!$record.sourceDirty) {
            foreach ($settingsPath in @('ProjectSettings/GraphicsSettings.asset','ProjectSettings/ProjectAuditorSettings.asset','ProjectSettings/ProjectSettings.asset','ProjectSettings/ShaderGraphSettings.asset','Assets/Settings/Mobile_RPAsset.asset','Assets/Settings/UniversalRenderPipelineGlobalSettings.asset')) {
                $workingBlob = & git hash-object --path=$settingsPath -- $settingsPath
                $workingExit = $LASTEXITCODE
                $sourceBlob = & git rev-parse "HEAD:$settingsPath"
                $sourceExit = $LASTEXITCODE
                $record.settingsContentChecks += @{ path=$settingsPath; workingBlob=$workingBlob; sourceBlob=$sourceBlob; hashObjectExit=$workingExit; revParseExit=$sourceExit }
                if ($workingExit -eq 0 -and $sourceExit -eq 0 -and $workingBlob -eq $sourceBlob -and [bool](& git status --porcelain -- $settingsPath)) {
                    & git restore --source=HEAD --worktree -- $settingsPath
                    if ($LASTEXITCODE -ne 0) { throw "Cannot restore unchanged generated setting: $settingsPath" }
                    $record.normalizedUnchangedSettings += $settingsPath
                }
            }
        }
        $record.sourceCommitEnd = (& git rev-parse HEAD)
        & git update-index --refresh | Out-Null
        $record.sourceDirtyEnd = [bool](& git status --porcelain)
        $record.trackedDiffEnd = @(& git diff --name-only HEAD)
        if ($record.sourceDirty -or $record.sourceDirtyEnd -or $record.sourceCommitEnd -ne $record.sourceCommit) { throw 'Source changed during the Android build or is dirty.' }
        if ($Milestone -eq 'Final') {
            Copy-Item -LiteralPath $apkPath -Destination (Join-Path $projectRoot 'artifacts/android/MagnetismHeroes.apk')
        }
    } else {
        $smokeScript = Join-Path $PSScriptRoot 'android/smoke.ps1'
        if (!(Test-Path -LiteralPath $smokeScript)) { throw 'Android smoke verification has not been implemented yet.' }
        $record.command = "pwsh -NoProfile -File tools/android/smoke.ps1 -ApkPath $apkPath -Milestone $Milestone -EvidenceDir $evidenceDir"
        & pwsh -NoProfile -File $smokeScript -ApkPath $apkPath -Milestone $Milestone -EvidenceDir $evidenceDir *> $logPath
        $record.exitCode = $LASTEXITCODE
        Get-Content -LiteralPath $logPath | Select-Object -Last 5 | Write-Host
        if ($LASTEXITCODE -ne 0) { throw "Android smoke verification exited $LASTEXITCODE." }
    }
    $record.status = 'passed'
} catch {
    $record.status = 'failed'
    $record.error = $_.Exception.Message
    Write-Host $record.error -ForegroundColor Red
} finally {
    $record.finishedUtc = [DateTime]::UtcNow.ToString('o')
    $record | ConvertTo-Json -Depth 8 | Set-Content -LiteralPath (Join-Path $evidenceDir "$phaseName-evidence.json") -Encoding utf8
}
if ($record.status -ne 'passed') { exit 1 }
Write-Host "$Phase / $Milestone passed. Evidence: $evidenceDir"
exit 0