param(

[string]$Version,

[string]$Dir,

[string]$Tool,

[string]$ApiUrl,

[string]$Token,

[switch]$Yes

)

$ErrorActionPreference = 'Stop'

if (-not $Version -and $env:MEMORIA_VERSION) { $Version = $env:MEMORIA_VERSION }

if (-not $Dir -and $env:MEMORIA_DIR) { $Dir = $env:MEMORIA_DIR }

if (-not $Tool -and $env:MEMORIA_TOOL) { $Tool = $env:MEMORIA_TOOL }

if (-not $ApiUrl -and $env:MEMORIA_API_URL) { $ApiUrl = $env:MEMORIA_API_URL }

if (-not $Token -and $env:MEMORIA_TOKEN) { $Token = $env:MEMORIA_TOKEN }

Write-Host @"

$Repo = if ($env:MEMORIA_REPO) { $env:MEMORIA_REPO } else { 'matrixorigin/Memoria' }

$Target = 'x86_64-pc-windows-msvc'

$Asset = "memoria-$Target.zip"

if (-not $Dir) {

$Dir = Join-Path $env:LOCALAPPDATA 'Programs\memoria'

}

if (-not $Version) { $Version = 'latest' }

if ($Version -eq 'latest') {

$release = Invoke-RestMethod "https://api.github.com/repos/$Repo/releases/latest" -Headers @{ 'User-Agent' = 'memoria-installer' }

$Version = $release.tag_name

}

$DownloadUrl = "https://github.com/$Repo/releases/download/$Version/$Asset"

$ChecksumUrl = "https://github.com/$Repo/releases/download/$Version/SHA256SUMS.txt"

$SkipDownload = $false

$existing = Get-Command memoria -ErrorAction SilentlyContinue

if ($existing) {

$installed = (memoria --version 2>$null) -replace '.*?(\d+\.\d+\.\d+).*', '$1'

$target_ver = $Version -replace '^v', ''

if ($installed -eq $target_ver) {

Write-Host "✓ memoria v$installed already installed (latest)" -ForegroundColor Green

$Dir = Split-Path $existing.Source

$SkipDownload = $true

} else {

Write-Host "> memoria v$installed installed, upgrading to v$target_ver"

}

}

if (-not $SkipDownload) {

Write-Host ""

Write-Host "> Version: $Version" -ForegroundColor Cyan

Write-Host "> Platform: $Target" -ForegroundColor Cyan

Write-Host "> Directory: $Dir" -ForegroundColor Cyan

Write-Host ""

if (-not $Yes -and -not ($Tool -and $ApiUrl -and $Token)) {

$yn = Read-Host 'Install memoria? [y/N]'

if ($yn -notmatch '^[Yy]') {

Write-Host '> Aborted'; exit 0

}

}

# ── Download ────────────────────────────────────────────────────

$tmp = New-Item -ItemType Directory -Path (Join-Path $env:TEMP "memoria-install-$(Get-Random)")

try {

$zipPath = Join-Path $tmp $Asset

Write-Host "> Downloading $DownloadUrl"

Invoke-WebRequest -Uri $DownloadUrl -OutFile $zipPath -UseBasicParsing

# ── Verify checksum ─────────────────────────────────────────

try {

$sumPath = Join-Path $tmp 'SHA256SUMS.txt'

Invoke-WebRequest -Uri $ChecksumUrl -OutFile $sumPath -UseBasicParsing

$expected = (Get-Content $sumPath | Where-Object { $_ -match $Asset }) -replace '\s+.*', ''

$actual = (Get-FileHash $zipPath -Algorithm SHA256).Hash.ToLower()

if ($expected -and $actual -eq $expected) {

Write-Host "✓ Checksum verified" -ForegroundColor Green

} elseif ($expected) {

Write-Host "✗ Checksum mismatch" -ForegroundColor Red; exit 1

}

} catch {

Write-Host "! Checksum file unavailable, skipping verification" -ForegroundColor Yellow

}

# ── Install ─────────────────────────────────────────────────

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

Expand-Archive -Path $zipPath -DestinationPath $tmp -Force

Copy-Item (Join-Path $tmp 'memoria.exe') (Join-Path $Dir 'memoria.exe') -Force

Write-Host ""

Write-Host "✓ Installed memoria.exe to $Dir\memoria.exe" -ForegroundColor Green

} finally {

Remove-Item -Recurse -Force $tmp -ErrorAction SilentlyContinue

}

}

$userPath = [Environment]::GetEnvironmentVariable('Path', 'User')

if ($userPath -notlike "*$Dir*") {

[Environment]::SetEnvironmentVariable('Path', "$Dir;$userPath", 'User')

$env:Path = "$Dir;$env:Path"

Write-Host "> Added $Dir to user PATH (restart terminal to take effect)" -ForegroundColor Yellow

}

$bin = Join-Path $Dir 'memoria.exe'

if ($Tool -and $ApiUrl -and $Token) {

Write-Host ""

Write-Host "> Running: memoria init --tool $Tool --api-url $ApiUrl --token ***"

& $bin init --tool $Tool --api-url $ApiUrl --token $Token --force

} elseif ($Tool) {

Write-Host ""

Write-Host "> Running: memoria init -i --tool $Tool"

& $bin init -i --tool $Tool

} else {

Write-Host ""

Write-Host "> Next: run 'memoria init -i' in your project directory to start the setup wizard" -ForegroundColor Cyan

}