<#
.SYNOPSIS
    Builds the tcp-echo Docker image and pushes it to the Gitea registry.
.EXAMPLE
    .\build-push.ps1 -Tag 1.0.0
    .\build-push.ps1 -Tag 1.0.0 -AlsoLatest
#>
[CmdletBinding()]
param(
    [Parameter(Mandatory = $true, Position = 0)]
    [ValidatePattern('^[A-Za-z0-9_][A-Za-z0-9_.-]{0,127}$')]
    [string]$Tag,

    # Also tag and push the image as :latest
    [switch]$AlsoLatest
)

$ErrorActionPreference = 'Stop'
$Registry = 'gitea.eitczech.com'
$Repo     = "$Registry/public/tcp-echo-server"
$Image    = "${Repo}:$Tag"
$Root     = $PSScriptRoot

function Invoke-Checked {
    param([string[]]$Cmd)
    Write-Host "> $($Cmd -join ' ')" -ForegroundColor Cyan
    & $Cmd[0] $Cmd[1..($Cmd.Length - 1)]
    if ($LASTEXITCODE -ne 0) { throw "Command failed with exit code ${LASTEXITCODE}: $($Cmd -join ' ')" }
}

# Metadata baked into OCI labels (shown on the Gitea package page)
$Revision = 'unknown'
if (Get-Command git -ErrorAction SilentlyContinue) {
    $r = (& git -C $Root rev-parse --short HEAD 2>$null)
    if ($LASTEXITCODE -eq 0 -and $r) { $Revision = $r.Trim() }
}
$Created = (Get-Date).ToUniversalTime().ToString('yyyy-MM-ddTHH:mm:ssZ')

Write-Host "Building $Image (revision $Revision)" -ForegroundColor Green
Invoke-Checked @('docker', 'build', '--pull',
    '--build-arg', "VERSION=$Tag",
    '--build-arg', "REVISION=$Revision",
    '--build-arg', "CREATED=$Created",
    '-t', $Image, $Root)

if ($AlsoLatest) {
    Invoke-Checked @('docker', 'tag', $Image, "${Repo}:latest")
}

Write-Host "Pushing $Image" -ForegroundColor Green
Invoke-Checked @('docker', 'push', $Image)

if ($AlsoLatest) {
    Invoke-Checked @('docker', 'push', "${Repo}:latest")
}

Write-Host "Done: $Image" -ForegroundColor Green
Write-Host "Deploy with:  kubectl -n tcp-echo set image deploy/tcp-echo-a deploy/tcp-echo-b tcp-echo=$Image"