$ErrorActionPreference = "Stop"

$Root = Split-Path -Parent $MyInvocation.MyCommand.Path
$Assets = Join-Path $Root "assets\windows_hd"

New-Item -ItemType Directory -Force -Path $Assets | Out-Null

# Version stable utilisée uniquement comme bootstrap vérifié par SHA-256.
# Le script passe ensuite automatiquement au canal nightly.
$YtVersion = "2026.07.04"
$YtBase = "https://github.com/yt-dlp/yt-dlp/releases/download/$YtVersion"
$YtExe = Join-Path $Assets "yt-dlp.exe"
$YtSums = Join-Path $env:TEMP "youtube-personal-yt-dlp-sha256.txt"

$DenoVersion = "2.9.4"
$DenoBase = "https://github.com/denoland/deno/releases/download/v$DenoVersion"
$DenoZipName = "deno-x86_64-pc-windows-msvc.zip"
$DenoZip = Join-Path $env:TEMP "youtube-personal-deno.zip"
$DenoSum = Join-Path $env:TEMP "youtube-personal-deno.sha256sum"
$DenoExtract = Join-Path $env:TEMP "youtube-personal-deno-extract"
$DenoExe = Join-Path $Assets "deno.exe"

function Assert-Sha256 {
    param(
        [Parameter(Mandatory = $true)][string]$File,
        [Parameter(Mandatory = $true)][string]$Expected
    )

    $Actual = (Get-FileHash -Algorithm SHA256 -Path $File).Hash.ToLowerInvariant()
    $ExpectedNormalized = $Expected.Trim().ToLowerInvariant()

    if ($Actual -ne $ExpectedNormalized) {
        Remove-Item -Force -ErrorAction SilentlyContinue $File
        throw "SHA-256 incorrect pour $File`nAttendu: $ExpectedNormalized`nObtenu: $Actual"
    }
}

Write-Host ""
Write-Host "=== YouTube Personal - Preparation HD/4K Windows ===" -ForegroundColor Cyan
Write-Host ""

Write-Host "[1/5] Telechargement bootstrap de yt-dlp stable $YtVersion..."
Invoke-WebRequest -UseBasicParsing `
    -Uri "$YtBase/yt-dlp.exe" `
    -OutFile $YtExe

Invoke-WebRequest -UseBasicParsing `
    -Uri "$YtBase/SHA2-256SUMS" `
    -OutFile $YtSums

$YtLine = Get-Content $YtSums |
    Where-Object { $_ -match "\syt-dlp\.exe$" } |
    Select-Object -First 1

if (-not $YtLine) {
    throw "Impossible de lire le SHA-256 officiel de yt-dlp.exe."
}

$YtExpected = ($YtLine -split "\s+")[0]
Assert-Sha256 -File $YtExe -Expected $YtExpected

Write-Host "[2/5] yt-dlp stable verifie." -ForegroundColor Green

Write-Host "[3/5] Mise a jour de yt-dlp vers le canal nightly..."
& $YtExe --update-to nightly
if ($LASTEXITCODE -ne 0) {
    throw "La mise a jour yt-dlp nightly a echoue."
}

$YtNightlyVersion = (& $YtExe --version).Trim()
if (-not $YtNightlyVersion) {
    throw "Impossible de lire la version yt-dlp nightly."
}

Write-Host "yt-dlp nightly actif: $YtNightlyVersion" -ForegroundColor Green

Write-Host "[4/5] Telechargement de Deno $DenoVersion..."
Invoke-WebRequest -UseBasicParsing `
    -Uri "$DenoBase/$DenoZipName" `
    -OutFile $DenoZip

Invoke-WebRequest -UseBasicParsing `
    -Uri "$DenoBase/$DenoZipName.sha256sum" `
    -OutFile $DenoSum

# Le fichier .sha256sum de Deno n'utilise pas forcément le format
# "<hash> <filename>". Certaines releases utilisent un petit format
# structuré avec des champs comme "path" et "hash".
#
# On extrait donc explicitement l'unique SHA-256 (64 caractères hexadécimaux)
# au lieu de supposer que le premier mot de la ligne est le hash.
$DenoChecksumText = Get-Content $DenoSum -Raw

$DenoHashMatches = [regex]::Matches(
    $DenoChecksumText,
    '(?i)(?<![0-9a-f])[0-9a-f]{64}(?![0-9a-f])'
)

if ($DenoHashMatches.Count -ne 1) {
    throw "Impossible de lire de façon sûre le SHA-256 officiel de Deno. Nombre de hash trouvés: $($DenoHashMatches.Count)"
}

$DenoExpected = $DenoHashMatches[0].Value
Assert-Sha256 -File $DenoZip -Expected $DenoExpected

Remove-Item -Recurse -Force -ErrorAction SilentlyContinue $DenoExtract
New-Item -ItemType Directory -Force -Path $DenoExtract | Out-Null
Expand-Archive -Force -Path $DenoZip -DestinationPath $DenoExtract

$ExtractedDeno = Join-Path $DenoExtract "deno.exe"

if (-not (Test-Path $ExtractedDeno)) {
    throw "deno.exe absent de l'archive officielle."
}

Copy-Item -Force $ExtractedDeno $DenoExe

Write-Host "[5/5] Verification des executables..." -ForegroundColor Green

& $YtExe --version
if ($LASTEXITCODE -ne 0) {
    throw "yt-dlp.exe ne demarre pas."
}

& $DenoExe --version
if ($LASTEXITCODE -ne 0) {
    throw "deno.exe ne demarre pas."
}

Remove-Item -Force -ErrorAction SilentlyContinue $YtSums
Remove-Item -Force -ErrorAction SilentlyContinue $DenoZip
Remove-Item -Force -ErrorAction SilentlyContinue $DenoSum
Remove-Item -Recurse -Force -ErrorAction SilentlyContinue $DenoExtract

Write-Host ""
Write-Host "HD/4K Windows prepare avec succes." -ForegroundColor Green
Write-Host "Fichiers:"
Write-Host "  $YtExe"
Write-Host "  $DenoExe"
Write-Host ""
Write-Host "Commande suivante:"
Write-Host '  flutter clean'
Write-Host '  flutter pub get'
Write-Host '  flutter run -d windows'