<#
.SYNOPSIS
    One-script BPShowServer installer for Windows.

.DESCRIPTION
    Downloads the latest BPShowServerSetup.exe bundle (or uses a local copy),
    runs it with the Burn bootstrapper, verifies the service is running,
    and confirms bpssctl is on the PATH.

    Remote install (run from an elevated PowerShell):
        iex (iwr 'https://get.bpshowserver.io/install.ps1').Content

    Local install:
        .\install.ps1
        .\install.ps1 -LocalBundle .\BPShowServerSetup.exe
        .\install.ps1 -Silent       # no UI, automated
        .\install.ps1 -Uninstall    # remove BPShowServer

.PARAMETER LocalBundle
    Path to a local BPShowServerSetup.exe. Skips the download step.

.PARAMETER BundleUrl
    Override the download URL for the bundle. Default points to the
    official release endpoint.

.PARAMETER Silent
    Run the installer without any UI (/quiet). Default for unattended installs.

.PARAMETER Uninstall
    Uninstall BPShowServer instead of installing.

.PARAMETER ClusterJoin
    Join this newly-installed node to an existing cluster leader as a member,
    right after the service comes up. Format: "host:port", e.g. "10.0.10.4:7443".
    Requires -ClusterInvite and -IUnderstandConfigWillBeReplaced. Destructive:
    replaces this node's local show/config with the leader's desired state
    (docs/04-clustering-and-ha.md §2). Calls "bpssctl cluster join" under the hood.

.PARAMETER ClusterInvite
    One-time invite code from the target leader's Cluster page (or
    "bpshow cluster invite create"). Required with -ClusterJoin.

.PARAMETER IUnderstandConfigWillBeReplaced
    Required explicit acknowledgment alongside -ClusterJoin — every join surface
    demands it so operators cannot wipe a show by accident.

    Example:
        .\install.ps1 -Silent -ClusterJoin 10.0.10.4:7443 -ClusterInvite ABC123 -IUnderstandConfigWillBeReplaced
#>
param(
    [string] $LocalBundle = "",
    [string] $BundleUrl   = "https://get.bpshowserver.io/releases/latest/BPShowServerSetup.exe",
    [switch] $Silent,
    [switch] $Uninstall,
    [string] $ClusterJoin = "",
    [string] $ClusterInvite = "",
    [switch] $IUnderstandConfigWillBeReplaced
)

Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

$ServiceName = "bpshowserver"
$ServerPort  = 7474

# ── Elevation check ───────────────────────────────────────────────────────────

$currentPrincipal = [Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()
$isAdmin = $currentPrincipal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)

if (-not $isAdmin) {
    Write-Host "Re-launching as Administrator..." -ForegroundColor Yellow
    $psArgs = "-NoProfile -ExecutionPolicy Bypass -File `"$PSCommandPath`""
    if ($LocalBundle) { $psArgs += " -LocalBundle `"$LocalBundle`"" }
    if ($Silent)      { $psArgs += " -Silent" }
    if ($Uninstall)   { $psArgs += " -Uninstall" }
    if ($ClusterJoin)   { $psArgs += " -ClusterJoin `"$ClusterJoin`"" }
    if ($ClusterInvite) { $psArgs += " -ClusterInvite `"$ClusterInvite`"" }
    if ($IUnderstandConfigWillBeReplaced) { $psArgs += " -IUnderstandConfigWillBeReplaced" }
    Start-Process powershell -Verb RunAs -ArgumentList $psArgs -Wait
    exit
}

# ── Uninstall mode ────────────────────────────────────────────────────────────

if ($Uninstall) {
    Write-Host "Uninstalling BPShowServer..." -ForegroundColor Cyan

    # Stop service if running
    $svc = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue
    if ($svc -and $svc.Status -eq 'Running') {
        Write-Host "  Stopping service $ServiceName..."
        Stop-Service -Name $ServiceName -Force
    }

    # Find the bundle's cached uninstall entry
    $uninstallKey = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"
    $bundleEntry = Get-ChildItem $uninstallKey -ErrorAction SilentlyContinue |
        Get-ItemProperty |
        Where-Object { $_.DisplayName -like "BPShowServer Setup*" } |
        Select-Object -First 1

    if ($bundleEntry) {
        Write-Host "  Running bundle uninstall..."
        $uninstallCmd = $bundleEntry.QuietUninstallString
        if ($uninstallCmd) {
            Start-Process -FilePath "cmd.exe" -ArgumentList "/c $uninstallCmd /quiet" -Wait -NoNewWindow
        }
    } else {
        # Fall back to MSI uninstall if bundle entry not found
        $msiEntry = Get-ChildItem $uninstallKey -ErrorAction SilentlyContinue |
            Get-ItemProperty |
            Where-Object { $_.DisplayName -eq "BPShowServer" } |
            Select-Object -First 1
        if ($msiEntry) {
            Write-Host "  Running MSI uninstall..."
            Start-Process msiexec -ArgumentList "/x $($msiEntry.PSChildName) /quiet /norestart" -Wait
        } else {
            Write-Warning "BPShowServer installation not found in registry."
        }
    }
    Write-Host "BPShowServer uninstalled." -ForegroundColor Green
    exit
}

# ── Download or use local bundle ─────────────────────────────────────────────

if ($LocalBundle -and (Test-Path $LocalBundle)) {
    $bundlePath = Resolve-Path $LocalBundle
    Write-Host "Using local bundle: $bundlePath" -ForegroundColor Cyan
} else {
    $tempDir    = Join-Path $env:TEMP "bpshowserver-install"
    $bundlePath = Join-Path $tempDir "BPShowServerSetup.exe"

    New-Item -ItemType Directory -Force -Path $tempDir | Out-Null

    Write-Host "Downloading BPShowServer installer..." -ForegroundColor Cyan
    Write-Host "  From: $BundleUrl"
    Write-Host "  To  : $bundlePath"

    [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
    $wc = New-Object Net.WebClient
    $wc.DownloadFile($BundleUrl, $bundlePath)
    Write-Host "  Download complete." -ForegroundColor Green
}

# ── Run installer ────────────────────────────────────────────────────────────

$installArgs = if ($Silent) { "/quiet /norestart" } else { "/norestart" }
Write-Host "`nRunning installer..." -ForegroundColor Cyan
Write-Host "  $bundlePath $installArgs"

$proc = Start-Process -FilePath $bundlePath -ArgumentList $installArgs -Wait -PassThru
if ($proc.ExitCode -notin @(0, 3010)) {
    throw "Installer exited with code $($proc.ExitCode). Installation failed."
}
if ($proc.ExitCode -eq 3010) {
    Write-Host "  A reboot is recommended to complete installation." -ForegroundColor Yellow
}

# ── Verify service ────────────────────────────────────────────────────────────

Write-Host "`nVerifying BPShowServer service..." -ForegroundColor Cyan
$maxWait = 15
$waited  = 0
do {
    Start-Sleep -Seconds 2
    $waited += 2
    $svc = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue
} while ((-not $svc -or $svc.Status -ne 'Running') -and $waited -lt $maxWait)

if ($svc -and $svc.Status -eq 'Running') {
    Write-Host "  Service '$ServiceName' is Running." -ForegroundColor Green
} else {
    Write-Warning "Service '$ServiceName' did not start within ${maxWait}s. Check Event Viewer."
}

# ── Verify CLI on PATH ────────────────────────────────────────────────────────

Write-Host "`nVerifying bpssctl CLI..." -ForegroundColor Cyan

# Refresh PATH in the current process (the MSI modifies the system PATH)
$env:PATH = [System.Environment]::GetEnvironmentVariable("PATH", "Machine") + ";" +
            [System.Environment]::GetEnvironmentVariable("PATH", "User")

$bpssctl = Get-Command bpssctl -ErrorAction SilentlyContinue
if ($bpssctl) {
    Write-Host "  bpssctl found at: $($bpssctl.Source)" -ForegroundColor Green
    try {
        $status = & bpssctl status 2>&1
        Write-Host "  bpssctl status: $status" -ForegroundColor Green
    } catch {
        Write-Host "  bpssctl is installed (service may still be starting)." -ForegroundColor Yellow
    }
} else {
    Write-Warning "bpssctl not found on PATH. Open a new shell to pick up the updated PATH."
}

# ── Optional: join a cluster (docs/04-clustering-and-ha.md §2) ──────────────────

if ($ClusterJoin) {
    if (-not $ClusterInvite -or -not $IUnderstandConfigWillBeReplaced) {
        Write-Warning "-ClusterJoin requires both -ClusterInvite and -IUnderstandConfigWillBeReplaced. Skipping cluster join."
    } elseif (-not (Get-Command bpssctl -ErrorAction SilentlyContinue)) {
        Write-Warning "bpssctl not found on PATH; skipping cluster join. Run it manually once the shell picks up the new PATH:"
        Write-Warning "  bpssctl cluster join $ClusterJoin --invite <code> --i-understand-config-will-be-replaced"
    } else {
        Write-Host "`nJoining cluster at $ClusterJoin..." -ForegroundColor Cyan
        & bpssctl cluster join $ClusterJoin --invite $ClusterInvite --i-understand-config-will-be-replaced
        if ($LASTEXITCODE -ne 0) {
            Write-Warning "Cluster join failed (see above). The service is still installed and running standalone."
        } else {
            Write-Host "  Cluster join complete." -ForegroundColor Green
        }
    }
}

# ── Done ──────────────────────────────────────────────────────────────────────

Write-Host ""
Write-Host "BPShowServer installed successfully!" -ForegroundColor Green
Write-Host ""
Write-Host "  Web UI  : http://localhost:$ServerPort"
Write-Host "  Service : sc query $ServiceName"
Write-Host "  CLI     : bpssctl status"
Write-Host "  Logs    : Get-EventLog -LogName Application -Source $ServiceName -Newest 20"
Write-Host ""