# Genaia Bridge PowerShell Installer
param([string]$InstallDir = "$env:USERPROFILE\bin")

$ErrorActionPreference = "Stop"

$BridgeName   = "bridge.ps1"
$FitaName     = "fita-client.ps1"
$InstallPath  = Join-Path $InstallDir $BridgeName
$FitaPath     = Join-Path $InstallDir $FitaName
$BridgeUrl    = "https://get.genaia.app/bridge-powershell"
$FitaUrl      = "https://get.genaia.app/fita-client-powershell"
$VersionUrl   = "https://get.genaia.app/bridge-powershell-version"

Write-Host "Genaia Bridge PowerShell Installer" -ForegroundColor Cyan
Write-Host "   Install dir: $InstallDir"

# Debug: list $HOME\bin contents
Write-Host ""
Write-Host "[DEBUG] Contents of ${InstallDir}:" -ForegroundColor DarkGray
if (Test-Path $InstallDir) {
    Get-ChildItem -Path $InstallDir | ForEach-Object {
        Write-Host "   $($_.Name)  ($([Math]::Round($_.Length / 1KB, 1)) KB)  LastWrite: $($_.LastWriteTime)" -ForegroundColor DarkGray
    }
} else {
    Write-Host "   (directory does not exist)" -ForegroundColor DarkGray
}

# Debug: show raw version line from installed bridge.ps1
$_debugBridgePath = Join-Path $InstallDir "bridge.ps1"
if (Test-Path $_debugBridgePath) {
    $_versionLine = Select-String -Path $_debugBridgePath -Pattern '^\$Version' | Select-Object -First 1
    Write-Host "[DEBUG] Version line in bridge.ps1: $($_versionLine.Line)" -ForegroundColor DarkGray
} else {
    Write-Host "[DEBUG] bridge.ps1 not found at $_debugBridgePath" -ForegroundColor DarkGray
}
Write-Host ""

# Create directory if needed
if (-not (Test-Path $InstallDir)) {
    New-Item -ItemType Directory -Path $InstallDir -Force | Out-Null
    Write-Host "   Created: $InstallDir" -ForegroundColor Green
}

# Check versions
$LatestVersion  = ""
$CurrentVersion = ""

try {
    $LatestVersion = (Invoke-WebRequest -Uri $VersionUrl -UseBasicParsing -TimeoutSec 10).Content.Trim()
    Write-Host "   Latest version:    $LatestVersion" -ForegroundColor Yellow
} catch {
    Write-Host "   Could not fetch latest version" -ForegroundColor Yellow
}

if (Test-Path $InstallPath) {
    try {
        $match = Select-String -Path $InstallPath -Pattern '^\$Version = "(.+?)"' | Select-Object -First 1
        if ($match) {
            $CurrentVersion = $match.Matches.Groups[1].Value.Trim()
        }
        Write-Host "   Installed version: $CurrentVersion" -ForegroundColor Yellow
    } catch {
        Write-Host "   Could not detect installed version" -ForegroundColor Yellow
    }
}

if ($LatestVersion -and $CurrentVersion -and ($CurrentVersion -eq $LatestVersion)) {
    Write-Host "Already up to date ($CurrentVersion)" -ForegroundColor Green
} else {
    if ($CurrentVersion -and $LatestVersion) {
        Write-Host "   Updating $CurrentVersion -> $LatestVersion" -ForegroundColor Cyan
    }

    Write-Host "   Downloading bridge.ps1..." -ForegroundColor Cyan
    try {
        Invoke-WebRequest -Uri $BridgeUrl -OutFile $InstallPath -UseBasicParsing
        Write-Host "   bridge.ps1 OK ($([Math]::Round((Get-Item $InstallPath).Length / 1KB, 1)) KB)" -ForegroundColor Green
    } catch {
        Write-Host "   Download failed: $_" -ForegroundColor Red
        exit 1
    }
}

# Always update fita-client.ps1 (lightweight, always want latest)
Write-Host "   Downloading fita-client.ps1..." -ForegroundColor Cyan
try {
    Invoke-WebRequest -Uri $FitaUrl -OutFile $FitaPath -UseBasicParsing
    Write-Host "   fita-client.ps1 OK ($([Math]::Round((Get-Item $FitaPath).Length / 1KB, 1)) KB)" -ForegroundColor Green
} catch {
    Write-Host "   fita-client.ps1 download failed: $_ (bridge will attempt to download it at runtime)" -ForegroundColor Yellow
}

Write-Host ""
Write-Host "Installation complete!" -ForegroundColor Green
Write-Host ""
Write-Host "Files installed:" -ForegroundColor Cyan
Write-Host "   $InstallPath"
Write-Host "   $FitaPath"
Write-Host ""
Write-Host "To run the bridge, create a config.json with your API key and bridgeId:" -ForegroundColor Yellow
Write-Host "   { `"bridgeId`": `"my-bridge`", `"apiKey`": `"your-api-key`" }" -ForegroundColor Gray
Write-Host ""
Write-Host "Then run:" -ForegroundColor Yellow
Write-Host "   powershell -ExecutionPolicy Bypass -File `"$InstallPath`"" -ForegroundColor Gray