<#
.SYNOPSIS
	Save-and-run launcher for a ShopDB dev workstation (stable or edge).

.DESCRIPTION
	Download this one file and run it. It clones (or updates) the repo at the
	channel branch into a local path, then hands off to scripts/dev-bootstrap.ps1
	for the real dependency-check / build / up work.

	ge-aero/shopdb-flask is a PRIVATE repo, but this needs no token pasting: the
	clone uses a plain https URL and Git Credential Manager supplies your stored
	GitHub credential automatically - the same way `git clone` works in the wiki
	DEVELOPMENT-SETUP procedure. If you have ever cloned this repo or signed in to
	GitHub in Visual Studio / VS Code on this box, GCM already has what it needs.

	This is a downloaded FILE, not a web `iex` one-liner, precisely because a
	private repo cannot be fetched anonymously from raw.githubusercontent.com. A
	saved script sidesteps that entirely - only the git operations need auth, and
	GCM handles those.

.PARAMETER Channel
	'stable' (main) or 'edge' (dev-be). Defaults to 'stable'.

.PARAMETER TargetDir
	Where to clone. Defaults to %USERPROFILE%\shopdb-dev, a separate working copy
	from any repo you already have open.

.EXAMPLE
	# Bleeding edge:
	powershell -ExecutionPolicy Bypass -File .\Start-ShopDBDev.ps1 -Channel edge

.EXAMPLE
	# Stable:
	powershell -ExecutionPolicy Bypass -File .\Start-ShopDBDev.ps1 -Channel stable

.NOTES
	ASCII only, no emoji or smart punctuation, per repo style. PowerShell 5.1+.
	Needs Git (with Credential Manager, the Git-for-Windows default);
	dev-bootstrap.ps1 offers to winget-install anything else that is missing.
#>
[CmdletBinding()]
param(
	[ValidateSet('stable', 'edge')]
	[string]$Channel = 'stable',

	[string]$TargetDir
)

$ErrorActionPreference = 'Stop'

# Plain https URL. No token in the URL: Git Credential Manager injects the
# stored GitHub credential for github.com, so clone/fetch authenticate against
# the private repo without anything sensitive touching this script or disk.
$repoUrl = 'https://github.com/ge-aero/shopdb-flask.git'
$branch = if ($Channel -eq 'edge') { 'dev-be' } else { 'main' }
$target = if ($TargetDir) { $TargetDir } else { Join-Path $env:USERPROFILE 'shopdb-dev' }

Write-Host "ShopDB dev launcher" -ForegroundColor White
Write-Host "  Channel : $Channel ($branch)" -ForegroundColor White
Write-Host "  Target  : $target" -ForegroundColor White

if (-not (Get-Command git -ErrorAction SilentlyContinue)) {
	throw 'git is required. Install Git for Windows (winget install Git.Git) and re-run.'
}

if (Test-Path (Join-Path $target '.git')) {
	Write-Host "==> Updating existing clone" -ForegroundColor Cyan
	git -C $target fetch origin $branch
	if ($LASTEXITCODE -ne 0) { throw "git fetch failed ($LASTEXITCODE). If this is an auth error, clone the repo once in Visual Studio / VS Code so Credential Manager stores your GitHub login." }
	git -C $target checkout $branch
	if ($LASTEXITCODE -ne 0) { throw "git checkout failed ($LASTEXITCODE)." }
	git -C $target pull --ff-only origin $branch
	if ($LASTEXITCODE -ne 0) { throw "git pull failed ($LASTEXITCODE)." }
} else {
	Write-Host "==> Cloning $branch" -ForegroundColor Cyan
	git clone --branch $branch $repoUrl $target
	if ($LASTEXITCODE -ne 0) { throw "git clone failed ($LASTEXITCODE). If this is an auth error, sign in to GitHub once in Visual Studio / VS Code (or run 'git clone $repoUrl' manually) so Credential Manager stores your login, then re-run." }
}

$bootstrap = Join-Path $target 'scripts\dev-bootstrap.ps1'
if (-not (Test-Path $bootstrap)) {
	throw "dev-bootstrap.ps1 not found at $bootstrap. Is the '$branch' branch correct?"
}

Write-Host "==> Handing off to dev-bootstrap.ps1" -ForegroundColor Cyan
& $bootstrap -Channel $Channel