[CmdletBinding()]
param(
    [switch]$DryRun,
    [string]$MavenCommand = "mvn"
)

$ErrorActionPreference = "Stop"
$repoRoot = (Resolve-Path (Join-Path $PSScriptRoot "..")).Path
$pom = Join-Path $repoRoot "pom.xml"
$requiredTests = @(
    "firstleg/src/test/java/com/baiyue/firstleg/oceanbooking/controller/PlatformOceanBookingControllerContractTest.java",
    "firstleg/src/test/java/com/baiyue/firstleg/oceanbooking/service/OceanBookingServiceTest.java",
    "firstleg/src/test/java/com/baiyue/firstleg/repository/TruckAppointmentMapperContractTest.java",
    "firstleg/src/test/java/com/baiyue/firstleg/service/TruckAppointmentServiceTest.java",
    "firstleg/src/test/java/com/baiyue/firstleg/controller/TruckAppointmentControllerContractTest.java",
    "firstleg/src/test/java/com/baiyue/firstleg/service/UnifiedInboundQueryServiceTest.java",
    "order/src/test/java/com/baiyue/order/service/UnifiedOrderQueryServiceTest.java"
)
$mavenArgs = @("-f", $pom, "-pl", "order,firstleg", "-am", "test")

Write-Host "Backend regression root: $repoRoot"
Write-Host "Scope: order + firstleg Maven reactor (includes all module tests)"
Write-Host "Database/API access: none"

if (-not (Test-Path -LiteralPath $pom)) {
    Write-Error "Missing Maven pom: $pom"
    exit 2
}

$missing = @($requiredTests | Where-Object { -not (Test-Path -LiteralPath (Join-Path $repoRoot $_)) })
if ($missing.Count -gt 0) {
    Write-Error ("Missing required regression coverage:`n" + ($missing -join "`n"))
    exit 2
}

Write-Host ("Command: {0} {1}" -f $MavenCommand, ($mavenArgs -join " "))
if ($DryRun) {
    Write-Host "DRY-RUN PASS: prerequisites and coverage files are present; Maven was not started."
    exit 0
}

Push-Location $repoRoot
try {
    & $MavenCommand @mavenArgs
    $code = $LASTEXITCODE
} finally {
    Pop-Location
}
if ($code -ne 0) {
    Write-Error "Maven regression failed with exit code $code"
    exit $code
}
Write-Host "Backend regression PASS"
exit 0