$ErrorActionPreference = "Stop"

Write-Host ""
Write-Host "=== YouTube Personal - Memoire 18.10.6 / Bridge Kotlin AGP 9 ===" -ForegroundColor Cyan
Write-Host "Projet : $PWD"
Write-Host ""

$root = (Get-Location).Path
$pubspec = Join-Path $root "pubspec.yaml"
$gradleProps = Join-Path $root "android\gradle.properties"
$rootGradle = Join-Path $root "android\build.gradle.kts"

foreach ($path in @($pubspec, $gradleProps, $rootGradle)) {
    if (-not (Test-Path $path)) {
        throw "Fichier introuvable : $path"
    }
}

function Backup-Once([string]$Path, [string]$Suffix) {
    $backup = "$Path.$Suffix"
    if (-not (Test-Path $backup)) {
        Copy-Item $Path $backup
        Write-Host "[OK] Sauvegarde : $backup" -ForegroundColor Green
    }
}

Backup-Once $pubspec "before_memory_18_10_6"
Backup-Once $gradleProps "before_memory_18_10_6"
Backup-Once $rootGradle "before_memory_18_10_6"
if (Test-Path (Join-Path $root "pubspec.lock")) {
    Backup-Once (Join-Path $root "pubspec.lock") "before_memory_18_10_6"
}

Write-Host "[1/6] Verification des dependances stables..." -ForegroundColor Yellow
$content = Get-Content $pubspec -Raw

function Set-DependencyLine {
    param([string]$Name, [string]$Version)
    $pattern = "(?m)^(\s*)" + [regex]::Escape($Name) + "\s*:\s*.*$"
    if ($script:content -match $pattern) {
        $script:content = [regex]::Replace(
            $script:content,
            $pattern,
            '${1}' + $Name + ': ' + $Version,
            1
        )
    } else {
        $anchor = '(?m)^dependencies\s*:\s*$'
        if ($script:content -notmatch $anchor) {
            throw "Section dependencies introuvable dans pubspec.yaml."
        }
        $script:content = [regex]::Replace(
            $script:content,
            $anchor,
            "dependencies:`r`n  $Name`: $Version",
            1
        )
    }
}

# file_picker reste supprime. On conserve la pile memoire 18.10.3+.
$content = [regex]::Replace($content, '(?m)^\s*file_picker\s*:\s*.*(?:\r?\n)?', '')
Set-DependencyLine "wakelock_plus" "1.3.3"
Set-DependencyLine "package_info_plus" "8.3.1"
Set-DependencyLine "file_selector" "1.1.0"
Set-DependencyLine "file_saver" "0.3.1"
Set-Content -Path $pubspec -Value $content -Encoding UTF8

Write-Host "[OK] wakelock_plus = 1.3.3" -ForegroundColor Green
Write-Host "[OK] package_info_plus = 8.3.1" -ForegroundColor Green
Write-Host "[OK] file_selector = 1.1.0" -ForegroundColor Green
Write-Host "[OK] file_saver = 0.3.1" -ForegroundColor Green

Write-Host "[2/6] Activation explicite du mode Kotlin legacy compatible AGP 9..." -ForegroundColor Yellow
$props = Get-Content $gradleProps -Raw

function Set-GradleProperty {
    param([string]$Name, [string]$Value)
    $pattern = '(?m)^\s*' + [regex]::Escape($Name) + '\s*=.*$'
    $line = "$Name=$Value"
    if ($script:props -match $pattern) {
        $script:props = [regex]::Replace($script:props, $pattern, $line, 1)
    } else {
        if (-not $script:props.EndsWith("`n")) {
            $script:props += "`r`n"
        }
        $script:props += "$line`r`n"
    }
}

# Flutter 3.44 utilise ce mode comme pont temporaire pour les plugins KGP.
Set-GradleProperty "android.builtInKotlin" "false"
Set-GradleProperty "android.newDsl" "false"
Set-Content -Path $gradleProps -Value $props -Encoding UTF8
Write-Host "[OK] android.builtInKotlin=false" -ForegroundColor Green
Write-Host "[OK] android.newDsl=false" -ForegroundColor Green

Write-Host "[3/6] Ajout du bridge Kotlin aux plugins qui perdaient leurs classes..." -ForegroundColor Yellow
$gradle = Get-Content $rootGradle -Raw
$beginMarker = "// BEGIN YOUTUBE_PERSONAL_AGP9_KOTLIN_BRIDGE_18_10_6"
$endMarker = "// END YOUTUBE_PERSONAL_AGP9_KOTLIN_BRIDGE_18_10_6"

# Retire une ancienne occurrence du meme bridge s'il y en a une.
$markerPattern = '(?ms)^\s*// BEGIN YOUTUBE_PERSONAL_AGP9_KOTLIN_BRIDGE_18_10_6.*?// END YOUTUBE_PERSONAL_AGP9_KOTLIN_BRIDGE_18_10_6\s*'
$gradle = [regex]::Replace($gradle, $markerPattern, '')

$bridge = @'

// BEGIN YOUTUBE_PERSONAL_AGP9_KOTLIN_BRIDGE_18_10_6
// Flutter 3.44 + AGP 9 peut fonctionner temporairement avec
// android.builtInKotlin=false. Certains plugins regardent uniquement la
// version d'AGP et n'appliquent alors plus KGP : leurs sources .kt ne sont
// jamais compilees et GeneratedPluginRegistrant ne trouve plus les classes.
val youtubePersonalLegacyKotlinPlugins = setOf(
    "package_info_plus",
    "wakelock_plus",
)

subprojects {
    if (name in youtubePersonalLegacyKotlinPlugins) {
        val pluginProject = this
        pluginManager.withPlugin("com.android.library") {
            if (!pluginProject.pluginManager.hasPlugin("org.jetbrains.kotlin.android")) {
                pluginProject.pluginManager.apply("org.jetbrains.kotlin.android")
            }
        }
    }
}
// END YOUTUBE_PERSONAL_AGP9_KOTLIN_BRIDGE_18_10_6
'@

$gradle = $gradle.TrimEnd() + "`r`n" + $bridge + "`r`n"
Set-Content -Path $rootGradle -Value $gradle -Encoding UTF8
Write-Host "[OK] Bridge ajoute dans android/build.gradle.kts" -ForegroundColor Green

Write-Host "[4/6] Arret des processus pouvant verrouiller le build..." -ForegroundColor Yellow
Get-Process youtube_personal -ErrorAction SilentlyContinue | Stop-Process -Force -ErrorAction SilentlyContinue
$gradlew = Join-Path $root "android\gradlew.bat"
if (Test-Path $gradlew) {
    Push-Location (Join-Path $root "android")
    try {
        & .\gradlew.bat --stop | Out-Host
    } catch {
        Write-Host "[INFO] Aucun daemon Gradle a arreter." -ForegroundColor DarkGray
    }
    Pop-Location
}

Write-Host "[5/6] Nettoyage Flutter et resolution des dependances..." -ForegroundColor Yellow
$registrant = Join-Path $root "android\app\src\main\java\io\flutter\plugins\GeneratedPluginRegistrant.java"
if (Test-Path $registrant) {
    Remove-Item $registrant -Force -ErrorAction SilentlyContinue
}

# On tente un clean complet; si Windows conserve un verrou, on nettoie les
# fichiers de metadata essentiels et Flutter regenerera le reste.
flutter clean
if ($LASTEXITCODE -ne 0) {
    Write-Host "[ATTENTION] flutter clean incomplet; nettoyage manuel des metadonnees." -ForegroundColor Yellow
}

foreach ($path in @(
    (Join-Path $root ".dart_tool"),
    (Join-Path $root ".flutter-plugins-dependencies")
)) {
    if (Test-Path $path) {
        Remove-Item $path -Recurse -Force -ErrorAction SilentlyContinue
    }
}

flutter pub get
if ($LASTEXITCODE -ne 0) {
    throw "flutter pub get a echoue. Les sauvegardes .before_memory_18_10_6 permettent de revenir en arriere."
}

Write-Host "[6/6] Build Android Debug de verification..." -ForegroundColor Yellow
flutter build apk --debug
if ($LASTEXITCODE -ne 0) {
    Write-Host "" 
    Write-Host "Le bridge a ete applique, mais le build a encore echoue." -ForegroundColor Red
    Write-Host "Copie uniquement la nouvelle erreur a partir de 'FAILURE: Build failed'." -ForegroundColor Yellow
    exit 1
}

Write-Host ""
Write-Host "[OK] Build Android Debug reussi avec le bridge Kotlin AGP 9." -ForegroundColor Green
Write-Host ""
Write-Host "Tu peux maintenant lancer :" -ForegroundColor Cyan
Write-Host "  flutter run -d f10778d8"
Write-Host ""
Write-Host "Puis creer l'APK Release :" -ForegroundColor Cyan
Write-Host "  flutter build apk --release"
Write-Host ""