$ErrorActionPreference = 'Stop'

$root = Split-Path -Parent $PSScriptRoot

function Read-Page([string]$Path) {
  Get-Content -LiteralPath (Join-Path $root $Path) -Raw -Encoding utf8
}

function Assert-Match {
  param([string]$Content, [string]$Pattern, [string]$Message)
  if ($Content -notmatch $Pattern) { throw $Message }
}

$pages = @{
  T01 = Read-Page 'pages/tree/t01-tree-overview.vue'
  T03 = Read-Page 'pages/tree/t03-member-profile.vue'
  T07 = Read-Page 'pages/tree/t07-member-directory.vue'
  F01 = Read-Page 'pages/family/f01-family-feed.vue'
  N01 = Read-Page 'pages/notification/n01-message-center.vue'
}

foreach ($entry in $pages.GetEnumerator()) {
  Assert-Match -Content $entry.Value -Pattern 'import AppLoading from\s*[''"]@/components/AppLoading\.vue[''"]' -Message "$($entry.Key) must import AppLoading"
}

Assert-Match -Content $pages.T01 -Pattern '<AppLoading\s+v-if="treeState === ''loading''"[^>]+description="[^"]+"\s*/>' -Message 'T01 must render AppLoading before its tree and state cards'
Assert-Match -Content $pages.T03 -Pattern '<AppLoading\s+v-if="memberState === ''loading''"[^>]+description="[^"]+"\s*/>' -Message 'T03 must render AppLoading before detail and error states'
Assert-Match -Content $pages.T07 -Pattern '<AppLoading\s+v-if="directoryState === ''loading''"[^>]+description="[^"]+"\s*/>' -Message 'T07 must render AppLoading before list and state cards'
Assert-Match -Content $pages.F01 -Pattern '<AppLoading\s+v-if="feedState === ''loading''"[^>]+description="[^"]+"\s*/>' -Message 'F01 must render AppLoading before feed content'
Assert-Match -Content $pages.N01 -Pattern '<AppLoading\s+v-if="noticeState === ''loading''"[^>]+description="[^"]+"\s*/>' -Message 'N01 must render AppLoading before message content'

Assert-Match -Content $pages.T01 -Pattern 'query\.state\s*===\s*["'']loading["'']' -Message 'T01 must preserve its loading presentation state'
Assert-Match -Content $pages.T03 -Pattern '(?s)const\s+memberState\s*=\s*ref\(["'']loading["'']\).*if\s*\(query\.state\s*===\s*["'']loading["'']\)\s*return;' -Message 'T03 must preserve its initial loading presentation state without redundant reassignment'
Assert-Match -Content $pages.T07 -Pattern 'query\.state\s*===\s*["'']loading["'']\s*\?\s*["'']loading["'']' -Message 'T07 must preserve its loading presentation state'
Assert-Match -Content $pages.F01 -Pattern 'query\.state\s*===\s*["'']loading["'']\s*\?\s*["'']loading["'']' -Message 'F01 must preserve its loading presentation state'
Assert-Match -Content $pages.N01 -Pattern 'query\.state\s*===\s*["'']loading["'']\s*\?\s*["'']loading["'']' -Message 'N01 must preserve its loading presentation state'

Write-Output 'MODULE-APP-LOADING-CONTRACT PASS'