$ErrorActionPreference = 'Stop'

$root = Split-Path -Parent $PSScriptRoot
$document = Get-Content -Raw -Encoding UTF8 -LiteralPath (Join-Path $root 'APP.openapi.json') | ConvertFrom-Json
$yaml = Get-Content -Raw -Encoding UTF8 -LiteralPath (Join-Path $root 'APP.openapi.yaml')
$issues = New-Object System.Collections.Generic.List[string]

function Add-Issue {
  param([string]$Message)
  $script:issues.Add($Message)
}

function Get-Post {
  param([string]$Path)
  $pathProperty = $document.paths.PSObject.Properties[$Path]
  if (-not $pathProperty -or -not $pathProperty.Value.post) {
    Add-Issue "JSON missing POST $Path"
    return $null
  }
  return $pathProperty.Value.post
}

function Get-Schema {
  param([string]$Name)
  $property = $document.components.schemas.PSObject.Properties[$Name]
  if (-not $property) {
    Add-Issue "JSON missing schema owner: $Name"
    return $null
  }
  return $property.Value
}

function Assert-SecurityAndClient {
  param([object]$Operation, [string]$Label)
  if (-not $Operation) { return }
  $hasSaToken = $false
  foreach ($requirement in @($Operation.security)) {
    if ($requirement.PSObject.Properties.Name -contains 'SaToken') { $hasSaToken = $true }
  }
  if (-not $hasSaToken) { Add-Issue "JSON $Label must require SaToken" }
  $client = @($Operation.parameters | Where-Object { $_.name -eq 'clientid' -and $_.in -eq 'header' })
  if ($client.Count -ne 1 -or $client[0].required -ne $true -or $client[0].schema.type -ne 'string') {
    Add-Issue "JSON $Label must require one string clientid header"
  }
}

function Get-ResponseRef {
  param([object]$Operation, [string]$Label)
  if (-not $Operation) { return '' }
  $response = $Operation.responses.PSObject.Properties['200'].Value
  if (-not $response) {
    Add-Issue "JSON $Label missing 200 response"
    return ''
  }
  if ($response.'$ref') {
    $responseName = ([string]$response.'$ref').Split('/')[-1]
    $response = $document.components.responses.PSObject.Properties[$responseName].Value
  }
  $media = @($response.content.PSObject.Properties)
  if ($media.Count -eq 0) {
    Add-Issue "JSON $Label missing response content"
    return ''
  }
  return [string]$media[0].Value.schema.'$ref'
}

$singlePath = '/genealogy/app/notifications/{notificationId}/read'
$allPath = '/genealogy/app/notifications/read-all'
$notificationIdPattern = '^[A-Za-z0-9][A-Za-z0-9._~-]{0,127}$'
$single = Get-Post $singlePath
$all = Get-Post $allPath
Assert-SecurityAndClient $single "POST $singlePath"
Assert-SecurityAndClient $all "POST $allPath"

if ((Get-ResponseRef $single "POST $singlePath") -ne '#/components/schemas/RVoid') {
  Add-Issue "JSON POST $singlePath must return RVoid"
}
if ((Get-ResponseRef $all "POST $allPath") -ne '#/components/schemas/RVoid') {
  Add-Issue "JSON POST $allPath must return RVoid"
}

if ($single) {
  $ids = @($single.parameters | Where-Object { $_.name -eq 'notificationId' -and $_.in -eq 'path' })
  if ($ids.Count -ne 1 -or $ids[0].required -ne $true -or $ids[0].schema.type -ne 'string' -or
      $ids[0].schema.minLength -ne 1 -or $ids[0].schema.maxLength -ne 128 -or
      $ids[0].schema.pattern -ne $notificationIdPattern) {
    Add-Issue 'JSON notificationId path must be a required 1..128 URL-safe opaque string'
  }
  if ($single.requestBody) { Add-Issue 'JSON mark-read operation must not accept a request body' }
}
if ($all -and $all.requestBody) { Add-Issue 'JSON read-all operation must not accept a request body' }

$void = Get-Schema 'RVoid'
if ($void) {
  if ('code' -notin @($void.required) -or $void.properties.code.type -ne 'integer') {
    Add-Issue 'JSON RVoid must require integer code'
  }
}

$notice = Get-Schema 'NotificationVo'
if ($notice) {
  if ('notificationId' -notin @($notice.required)) {
    Add-Issue 'JSON NotificationVo.required missing: notificationId'
  }
  $id = $notice.properties.notificationId
  if ($id.type -ne 'string' -or [int]$id.minLength -ne 1 -or [int]$id.maxLength -ne 128 -or
      $id.pattern -ne $notificationIdPattern) {
    Add-Issue 'JSON NotificationVo.notificationId must be the same 1..128 URL-safe opaque string'
  }
}

foreach ($yamlFact in @(
  '  /genealogy/app/notifications/{notificationId}/read:',
  '  /genealogy/app/notifications/read-all:',
  '#/components/schemas/RVoid',
  '    NotificationVo:',
  '    RVoid:',
  '        - notificationId',
  '        - code'
)) {
  if (-not $yaml.Contains($yamlFact)) { Add-Issue "YAML fact is missing: $yamlFact" }
}

if ($issues.Count -gt 0) {
  $lines = New-Object System.Collections.Generic.List[string]
  $lines.Add('NOTIFICATION-READ-STATE-OPENAPI-CONTRACT BLOCKED')
  foreach ($issue in $issues) { $lines.Add("- $issue") }
  $lines.Add('- Both operations must be idempotent for the current account; repeated calls return success without duplicate side effects.')
  $lines.Add('- The backend must define cross-account 403/404 behavior, read-all cutoff semantics, concurrent new-message behavior, and count/list refresh rules.')
  $lines.Add('- Replace both protected exports from one backend version; do not hand-edit APP.openapi.json or APP.openapi.yaml.')
  throw ($lines -join [Environment]::NewLine)
}

Write-Output 'NOTIFICATION-READ-STATE-OPENAPI-CONTRACT PASS'