$ErrorActionPreference = "Stop"

Write-Host "=== Agentic OS Installer ==="
Write-Host ""

function Resolve-Python {
    $candidates = @(
        @{ Command = "py"; Args = @("-3.10") },
        @{ Command = "py"; Args = @("-3") },
        @{ Command = "python"; Args = @() }
    )

    foreach ($candidate in $candidates) {
        $cmd = Get-Command $candidate.Command -ErrorAction SilentlyContinue
        if (-not $cmd) { continue }

        try {
            & $candidate.Command @($candidate.Args) --version *> $null
            return $candidate
        } catch {
            continue
        }
    }

    throw "Python 3.10+ is required. Install it from https://www.python.org/downloads/ and check 'Add Python to PATH'."
}

$python = Resolve-Python
$pythonCommand = $python.Command
$pythonArgs = @($python.Args)
$pythonVersion = & $pythonCommand @pythonArgs --version
Write-Host "Python: $pythonVersion"

Write-Host "Installing Python dependencies..."
& $pythonCommand @pythonArgs -m pip install -r requirements.txt --quiet

# Check Node.js (for opencode)
if (Get-Command node -ErrorAction SilentlyContinue) {
    Write-Host "Node.js: $(node --version)"
} else {
    Write-Warning "Node.js not found. opencode requires Node 18+. Install from https://nodejs.org/."
}

# Check opencode
if (Get-Command opencode -ErrorAction SilentlyContinue) {
    $opencodeVersion = try { opencode --version } catch { "installed" }
    Write-Host "opencode: $opencodeVersion"
} else {
    Write-Warning "opencode not found. Install via: npm install -g @opencode/cli"
}

# Check Hermes
if (Get-Command hermes -ErrorAction SilentlyContinue) {
    Write-Host "Hermes: found"
} else {
    Write-Warning "Hermes Agent not found. See the Hermes Agent documentation for Windows installation guidance."
}

# Check Gemini CLI
if (Get-Command gemini -ErrorAction SilentlyContinue) {
    Write-Host "Gemini CLI: found"
} else {
    Write-Warning "Gemini CLI not found. Install via: npm install -g @google/gemini-cli"
}

New-Item -ItemType Directory -Force -Path backups, audit | Out-Null

if (-not (Test-Path .git)) {
    Write-Host "Initializing git repository..."
    git init
    foreach ($entry in @("audit/*", "backups/*.tar.gz", "data/settings.json")) {
        if (-not (Test-Path .gitignore) -or -not (Select-String -Path .gitignore -Pattern ([regex]::Escape($entry)) -Quiet)) {
            Add-Content -Path .gitignore -Value $entry
        }
    }
}

Write-Host ""
Write-Host "=== Installation complete! ==="
Write-Host ""
Write-Host "Next steps:"
Write-Host "  1. Edit data/settings.json with your API keys"
Write-Host "  2. Run .\start.ps1 to launch the dashboard"
Write-Host "  3. Open http://127.0.0.1:8080 in your browser"