#!/usr/bin/env pwsh
[CmdletBinding()]
param(
  [string]$DiscordWebhookUrl = $env:DISCORD_WEBHOOK_URL,
  [string]$Repository = $env:GITHUB_REPOSITORY,
  [string]$RefName = $env:GITHUB_REF_NAME,
  [string]$Sha = $env:GITHUB_SHA,
  [string]$RunUrl = $env:GITHUB_SERVER_URL
)

$ErrorActionPreference = 'Stop'
$exitCode = 0
$smellFailures = New-Object System.Collections.Generic.List[string]
$smellWarnings = New-Object System.Collections.Generic.List[string]

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

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

function Get-ProjectFiles {
  $excludeDirs = @('.git', 'node_modules', 'dist', 'build', 'coverage')
  Get-ChildItem -Path . -File -Recurse -Force |
    Where-Object {
      $pathParts = $_.FullName.Substring((Get-Location).Path.Length).Split([IO.Path]::DirectorySeparatorChar, [StringSplitOptions]::RemoveEmptyEntries)
      -not ($pathParts | Where-Object { $excludeDirs -contains $_ })
    }
}

function Test-CodeSmells {
  Write-Host 'Running gated smell checks...'

  $files = @(Get-ProjectFiles)
  $debtMarkerPattern = '\b(T' + 'ODO|F' + 'IXME|H' + 'ACK|X' + 'XX|W' + 'IP)\b'
  foreach ($file in $files) {
    $relativePath = Resolve-Path -Relative $file.FullName

    if ($file.Length -gt 1MB) {
      Add-SmellWarning "$relativePath is larger than 1 MB."
    }

    $content = Get-Content -Raw -LiteralPath $file.FullName

    if ($content -match '(?m)^(<<<<<<<|=======|>>>>>>>)') {
      Add-SmellFailure "$relativePath contains merge conflict markers."
    }

    if ($content -match '(?i)(discord(?:_webhook)?_url|password|api[_-]?key|secret)\s*[:=]\s*["''][^"'']{8,}["'']') {
      Add-SmellFailure "$relativePath may contain a committed secret."
    }

    $todoMatches = [regex]::Matches($content, "(?i)$debtMarkerPattern")
    if ($todoMatches.Count -gt 0) {
      Add-SmellWarning "$relativePath contains $($todoMatches.Count) debt marker(s)."
    }
  }

  if ($smellFailures.Count -gt 0) {
    Write-Host 'Smell checks failed:'
    $smellFailures | ForEach-Object { Write-Host " - $_" }
    return $false
  }

  if ($smellWarnings.Count -gt 0) {
    Write-Host 'Smell check warnings:'
    $smellWarnings | ForEach-Object { Write-Host " - $_" }
  } else {
    Write-Host 'No smell check warnings found.'
  }

  return $true
}

function Invoke-TestSuite {
  Write-Host 'Running test suite...'
  $tempRoot = if ($env:RUNNER_TEMP) { $env:RUNNER_TEMP } else { [IO.Path]::GetTempPath() }
  $outputFile = Join-Path $tempRoot 'zone-test-output.txt'

  & npm test 2>&1 | Tee-Object -FilePath $outputFile
  $testExitCode = $LASTEXITCODE
  $output = Get-Content -Raw -LiteralPath $outputFile

  return [pscustomobject]@{
    Passed = ($testExitCode -eq 0)
    ExitCode = $testExitCode
    Output = $output.Trim()
  }
}

function Get-ShortText {
  param(
    [string]$Text,
    [int]$MaxLength = 1400
  )

  if ([string]::IsNullOrWhiteSpace($Text)) {
    return 'No output captured.'
  }

  if ($Text.Length -le $MaxLength) {
    return $Text
  }

  return $Text.Substring($Text.Length - $MaxLength)
}

function Send-DiscordReport {
  param(
    [bool]$SmellsPassed,
    [object]$Tests
  )

  if ([string]::IsNullOrWhiteSpace($DiscordWebhookUrl)) {
    Write-Host 'DISCORD_WEBHOOK_URL is not set; skipping Discord report.'
    return
  }

  $status = if ($SmellsPassed -and $Tests.Passed) { 'passed' } else { 'failed' }
  $color = if ($status -eq 'passed') { 5763719 } else { 15548997 }
  $shaShort = if ($Sha -and $Sha.Length -ge 7) { $Sha.Substring(0, 7) } else { $Sha }
  $repoText = if ($Repository) { $Repository } else { 'zone' }
  $refText = if ($RefName) { $RefName } else { 'unknown ref' }
  $smellStatus = if ($SmellsPassed) { 'passed' } else { 'failed' }
  $testStatus = if ($Tests.Passed) { 'passed' } else { "failed (exit $($Tests.ExitCode))" }
  $warningText = if ($smellWarnings.Count -gt 0) { ($smellWarnings -join "`n") } else { 'None' }
  $failureText = if ($smellFailures.Count -gt 0) { ($smellFailures -join "`n") } else { 'None' }

  $description = @"
Repository: $repoText
Ref: $refText
Commit: $shaShort

Smell checks: $smellStatus
Tests: $testStatus
"@

  $fields = @(
    @{
      name = 'Smell failures'
      value = Get-ShortText -Text $failureText -MaxLength 900
      inline = $false
    },
    @{
      name = 'Smell warnings'
      value = Get-ShortText -Text $warningText -MaxLength 900
      inline = $false
    },
    @{
      name = 'Test output'
      value = "``````text`n$(Get-ShortText -Text $Tests.Output -MaxLength 900)`n``````"
      inline = $false
    }
  )

  $payload = @{
    username = 'Zone CI'
    embeds = @(
      @{
        title = "Gated analysis $status"
        description = $description.Trim()
        color = $color
        fields = $fields
        timestamp = (Get-Date).ToUniversalTime().ToString('o')
      }
    )
  }

  if ($RunUrl -and $env:GITHUB_RUN_ID) {
    $payload.embeds[0].url = "$RunUrl/$repoText/actions/runs/$($env:GITHUB_RUN_ID)"
  }

  Invoke-RestMethod -Method Post -Uri $DiscordWebhookUrl -ContentType 'application/json' -Body ($payload | ConvertTo-Json -Depth 8) | Out-Null
  Write-Host 'Discord report published.'
}

$smellsPassed = Test-CodeSmells
if (-not $smellsPassed) {
  $exitCode = 1
}

$tests = Invoke-TestSuite
if (-not $tests.Passed) {
  $exitCode = $tests.ExitCode
}

Send-DiscordReport -SmellsPassed $smellsPassed -Tests $tests
exit $exitCode