# CapsBro installer for Adobe Premiere Pro (Windows).
#
# Run it from PowerShell with one line (the website shows the exact line):
#     irm https://capsbro.pages.dev/install | iex
#
# What it does:
#   1. Downloads the CapsBro panel (a few hundred KB) from the CapsBro server
#      and checks every file against its SHA-256.
#   2. Puts it in your user's Premiere extensions folder:
#      %APPDATA%\Adobe\CEP\extensions\com.capsbro.premiere
#   3. Remembers which release channel it came from.
# No administrator rights, no .exe, nothing runs in the background. The panel
# sets up its AI engine by itself the first time you open it in Premiere.
#
# The channel, server and site addresses below are filled in when the website is built.

& {
    $ErrorActionPreference = 'Stop'
    $ProgressPreference = 'SilentlyContinue'
    $Channel = 'stable'
    $Cdn = 'https://rosybrown-spoonbill-256117.hostingersite.com/capsbro/'
    $Site = 'https://capsbro.pages.dev'
    $BundleId = 'com.capsbro.premiere'

    function Say([string]$Text, [string]$Color = 'Gray') { Write-Host $Text -ForegroundColor $Color }
    function Step([string]$Text) { Write-Host ('  > ' + $Text) -ForegroundColor White }

    try {
        # Windows PowerShell 5.1 may still default to old TLS versions.
        [Net.ServicePointManager]::SecurityProtocol = [Net.ServicePointManager]::SecurityProtocol -bor [Net.SecurityProtocolType]::Tls12

        Write-Host ''
        Say '  CapsBro for Premiere Pro' 'Magenta'
        Say '  Automatic captions, right inside Premiere.' 'DarkGray'
        Write-Host ''

        if (-not [Environment]::Is64BitOperatingSystem) { throw 'CapsBro needs 64 bit Windows 10 or 11.' }

        $premiere = @(Get-ChildItem 'C:\Program Files\Adobe' -Directory -Filter 'Adobe Premiere Pro*' -ErrorAction SilentlyContinue)
        if ($premiere.Count -eq 0) {
            Say '  Note: Premiere Pro was not found in C:\Program Files\Adobe. CapsBro will appear once it is installed.' 'Yellow'
        }

        Step 'Checking the latest version'
        $stamp = [DateTimeOffset]::UtcNow.ToUnixTimeSeconds()
        $info = Invoke-RestMethod -Uri ($Cdn + 'c/' + $Channel + '.json?t=' + $stamp) -UseBasicParsing -TimeoutSec 60
        if (-not $info.panel) { throw 'The CapsBro server has no panel to install right now. Please try again later.' }
        $manifest = Invoke-RestMethod -Uri ($Cdn + $info.panel.manifest) -UseBasicParsing -TimeoutSec 60

        $temp = Join-Path $env:TEMP ('CapsBro-install-' + [Guid]::NewGuid().ToString('N').Substring(0, 8))
        $stage = Join-Path $temp $BundleId
        New-Item -ItemType Directory -Force -Path $stage | Out-Null

        Step ('Downloading CapsBro ' + $manifest.version)
        $client = New-Object System.Net.WebClient
        $client.Headers.Add('User-Agent', 'CapsBro-Installer')
        foreach ($f in $manifest.files) {
            $dest = Join-Path $stage ($f.p -replace '/', '\')
            New-Item -ItemType Directory -Force -Path (Split-Path $dest -Parent) | Out-Null
            $url = $Cdn + 'o/' + $f.h.Substring(0, 2) + '/' + $f.h
            $ok = $false
            for ($try = 1; $try -le 4 -and -not $ok; $try++) {
                try {
                    $client.DownloadFile($url, $dest)
                    $hash = (Get-FileHash -Algorithm SHA256 -Path $dest).Hash.ToLowerInvariant()
                    if ($hash -eq $f.h) { $ok = $true } else { Start-Sleep -Seconds $try }
                } catch { Start-Sleep -Seconds $try }
            }
            if (-not $ok) { throw ('Could not download ' + $f.p + '. Check your internet connection and run the command again.') }
        }
        $client.Dispose()

        Step 'Installing the panel'
        $extRoot = Join-Path $env:APPDATA 'Adobe\CEP\extensions'
        New-Item -ItemType Directory -Force -Path $extRoot | Out-Null
        $target = Join-Path $extRoot $BundleId
        if (Test-Path -LiteralPath $target) {
            $item = Get-Item -LiteralPath $target -Force
            if ($item.Attributes -band [IO.FileAttributes]::ReparsePoint) {
                # A link (a developer setup): remove the link only, never what it points to.
                [IO.Directory]::Delete($target, $false)
            } else {
                $old = $target + '.old'
                if (Test-Path -LiteralPath $old) { Remove-Item -LiteralPath $old -Recurse -Force }
                Rename-Item -LiteralPath $target -NewName ($BundleId + '.old')
                Remove-Item -LiteralPath $old -Recurse -Force -ErrorAction SilentlyContinue
            }
        }
        Move-Item -LiteralPath $stage -Destination $target
        Remove-Item -LiteralPath $temp -Recurse -Force -ErrorAction SilentlyContinue

        $data = Join-Path $env:LOCALAPPDATA 'CapsBro'
        New-Item -ItemType Directory -Force -Path $data | Out-Null
        $record = [ordered]@{
            channel = $Channel; cdn = $Cdn; site = $Site; version = $manifest.version
            build = $manifest.build; installedAt = (Get-Date).ToUniversalTime().ToString('o')
        }
        [IO.File]::WriteAllText((Join-Path $data 'install.json'), ($record | ConvertTo-Json), (New-Object Text.UTF8Encoding($false)))

        Write-Host ''
        Say ('  CapsBro ' + $manifest.version + ' is installed.') 'Green'
        Write-Host ''
        if (Get-Process -Name 'Adobe Premiere Pro' -ErrorAction SilentlyContinue) {
            Say '  Premiere Pro is open: close it and open it again.' 'Yellow'
        }
        Say '  Next: open Premiere Pro, then Window > Extensions > CapsBro.' 'White'
        Say '  The first time, CapsBro downloads its AI once (4 to 7 GB). It keeps going if you close Premiere,' 'DarkGray'
        Say '  and it can use another drive if C: is full.' 'DarkGray'
        Write-Host ''
    } catch {
        Write-Host ''
        Say ('  CapsBro could not be installed: ' + $_.Exception.Message) 'Red'
        Say ('  Need help? Visit ' + $Site) 'DarkGray'
        Write-Host ''
    }
}