#Requires -Version 5.1
# Windows launcher: venv + pip + python -m gpu_rent. Call via gpu-rent.bat if ExecutionPolicy blocks this file.
Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

$Root = Split-Path -Parent $MyInvocation.MyCommand.Path
Set-Location -LiteralPath $Root
try {
    $utf8 = New-Object System.Text.UTF8Encoding $false
    [Console]::OutputEncoding = $utf8
    $script:OutputEncoding = $utf8
} catch {
}

function Import-GpuRentVars {
    param([Parameter(Mandatory = $true)][string]$Path)
    if (-not (Test-Path -LiteralPath $Path)) { return }
    Get-Content -LiteralPath $Path -Encoding UTF8 | ForEach-Object {
        $line = $_.Trim()
        if (-not $line -or $line.StartsWith("#")) { return }
        if ($line -match '^(?i)export\s+') {
            $line = $line.Substring($Matches[0].Length).Trim()
        }
        $eq = $line.IndexOf("=")
        if ($eq -lt 1) { return }
        $key = $line.Substring(0, $eq).Trim()
        $val = $line.Substring($eq + 1).Trim()
        if ($val.Length -ge 2) {
            $q = $val[0]
            if (($q -eq '"' -or $q -eq "'") -and $val[-1] -eq $q) {
                $val = $val.Substring(1, $val.Length - 2)
            }
        }
        if (-not $key) { return }
        $existing = [Environment]::GetEnvironmentVariable($key, "Process")
        if ([string]::IsNullOrEmpty($existing)) {
            Set-Item -Path "Env:$key" -Value $val
        }
    }
}

function Test-Python311 {
    param(
        [Parameter(Mandatory = $true)][string]$Exe,
        [string[]]$Prefix = @()
    )
    $cmd = Get-Command $Exe -ErrorAction SilentlyContinue
    if (-not $cmd) {
        return $false
    }
    try {
        & $Exe @Prefix -c "import sys; raise SystemExit(0 if sys.version_info >= (3, 11) else 1)" 2>$null | Out-Null
        return ($LASTEXITCODE -eq 0)
    } catch {
        return $false
    }
}

$PyExe = $null
$PyPrefix = @()
$found = $false
foreach ($row in @(
        @{ Exe = "py"; Prefix = @("-3.12") },
        @{ Exe = "py"; Prefix = @("-3.11") },
        @{ Exe = "py"; Prefix = @("-3") },
        @{ Exe = "python3"; Prefix = @() },
        @{ Exe = "python"; Prefix = @() }
    )) {
    if (Test-Python311 -Exe $row.Exe -Prefix $row.Prefix) {
        $PyExe = $row.Exe
        $PyPrefix = $row.Prefix
        $found = $true
        break
    }
}

if (-not $found) {
    Write-Host "gpu-rent: нужен Python 3.11+. Поставь с python.org и включи Add python.exe to PATH."
    exit 1
}

$VenvPy = Join-Path $Root ".venv\Scripts\python.exe"
if (-not (Test-Path -LiteralPath $VenvPy)) {
    Write-Host "gpu-rent: создаю .venv"
    & $PyExe @PyPrefix -m venv (Join-Path $Root ".venv")
}

$Stamp = Join-Path $Root ".venv\.gpu-rent-installed"
$Pyproject = Join-Path $Root "pyproject.toml"
$needInstall = -not (Test-Path -LiteralPath $Stamp)
if (-not $needInstall -and (Test-Path -LiteralPath $Pyproject)) {
    $needInstall = (Get-Item -LiteralPath $Pyproject).LastWriteTime -gt (Get-Item -LiteralPath $Stamp).LastWriteTime
}
if ($needInstall) {
    Write-Host "gpu-rent: ставлю пакет в .venv"
    & $VenvPy -m pip install -U pip
    if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
    & $VenvPy -m pip install -e $Root
    if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
    Get-Date -Format o | Set-Content -LiteralPath $Stamp -Encoding ascii
}

$EnvFile = Join-Path $Root ".env"
$Example = Join-Path $Root "env.example"
if (-not (Test-Path -LiteralPath $EnvFile)) {
    if (Test-Path -LiteralPath $Example) {
        Copy-Item -LiteralPath $Example -Destination $EnvFile
        Write-Host "gpu-rent: created .env - fill OS_* (docs/setup.md)"
    }
}

function Copy-IfMissing {
    param([string]$Src, [string]$Dst, [string]$Label)
    if ((Test-Path -LiteralPath $Src) -and -not (Test-Path -LiteralPath $Dst)) {
        Copy-Item -LiteralPath $Src -Destination $Dst
        Write-Host "gpu-rent: created $Label"
    }
}
Copy-IfMissing (Join-Path $Root "models.example.yaml") (Join-Path $Root "models.yaml") "models.yaml"
Copy-IfMissing (Join-Path $Root "extensions.example.yaml") (Join-Path $Root "extensions.yaml") "extensions.yaml"
Copy-IfMissing (Join-Path $Root "gpu-rent.vars.example") (Join-Path $Root "gpu-rent.vars") "gpu-rent.vars"

Import-GpuRentVars (Join-Path $Root "gpu-rent.vars")

$InvokeArgs = @($args)
if ($InvokeArgs.Count -eq 0 -and $env:GPU_RENT_DEFAULT_ARGS) {
    $InvokeArgs = @($env:GPU_RENT_DEFAULT_ARGS -split '\s+' | Where-Object { $_ })
}
if ($env:GPU_RENT_EXTRA_ARGS) {
    $InvokeArgs += @($env:GPU_RENT_EXTRA_ARGS -split '\s+' | Where-Object { $_ })
}

$ErrorActionPreference = "Continue"
& $VenvPy -m gpu_rent @InvokeArgs
exit $LASTEXITCODE