<#
.SYNOPSIS
    Exportiert Fachliches Board und TTTI Board aus Jira
#>

$JiraUrl = "https://arija.jaas.service.deutschebahn.com"
$ApiBase = "$JiraUrl/rest"
$OutputDir = "project-audit\data\jira-boards"

$Boards = @(
    @{ id = 2791; name = "Fachliches-Board" }
    @{ id = 1487; name = "TTTI-Board" }
)

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

Write-Host "============================================================"
Write-Host "  pathOS Boards Export (Fachlich + TTTI)"
Write-Host "============================================================"

$Token = Read-Host "Jira PAT"
$Headers = @{ "Authorization" = "Bearer $Token"; "Content-Type" = "application/json" }

New-Item -ItemType Directory -Path $OutputDir -Force | Out-Null

function Invoke-JiraApi($Uri) {
    try {
        $R = Invoke-WebRequest -Uri $Uri -Headers $Headers -UseBasicParsing -ErrorAction Stop
        return ($R.Content | ConvertFrom-Json)
    } catch {
        Write-Host "    FEHLER: $($_.Exception.Message)" -ForegroundColor Red
        return $null
    }
}

foreach ($Board in $Boards) {
    $BId = $Board.id
    $BName = $Board.name
    Write-Host ""
    Write-Host ">> $BName (Board ID: $BId)" -ForegroundColor Yellow

    # Board-Info
    $Info = Invoke-JiraApi "$ApiBase/agile/1.0/board/$BId"
    if ($Info) {
        Write-Host "  Board: $($Info.name) (Projekt: $($Info.location.projectKey))"
        $Info | ConvertTo-Json -Depth 5 | Out-File "$OutputDir\$BName-info.json" -Encoding UTF8
    }

    # Board-Config
    $Config = Invoke-JiraApi "$ApiBase/agile/1.0/board/$BId/configuration"
    if ($Config) {
        $Config | ConvertTo-Json -Depth 10 | Out-File "$OutputDir\$BName-config.json" -Encoding UTF8
    }

    # Issues auf dem Board
    Write-Host "  Lade Issues..." -NoNewline
    $Issues = @()
    $Start = 0
    do {
        $Uri = "$ApiBase/agile/1.0/board/$BId/issue?startAt=$Start&maxResults=100&fields=summary,status,issuetype,assignee,labels,components,fixVersions,priority,created,updated"
        $Result = Invoke-JiraApi $Uri
        if ($null -eq $Result) { break }
        $Issues += $Result.issues
        $Start += 100
        Write-Host "." -NoNewline
    } while ($Issues.Count -lt $Result.total -and $Issues.Count -lt 1000)
    Write-Host ""
    Write-Host "  $($Issues.Count) Issues geladen" -ForegroundColor Green

    $Issues | ConvertTo-Json -Depth 10 | Out-File "$OutputDir\$BName-issues.json" -Encoding UTF8

    # Analyse
    $ByType = $Issues | Group-Object { $_.fields.issuetype.name }
    $ByStatus = $Issues | Group-Object { $_.fields.status.name }
    $ByLabel = @{}
    foreach ($I in $Issues) {
        if ($I.fields.labels) {
            foreach ($L in $I.fields.labels) { $ByLabel[$L] = ($ByLabel[$L]) + 1 }
        }
    }

    $Done = ($Issues | Where-Object { $_.fields.status.name -match "Fertig|Done|Closed|Resolved|Geloest" }).Count
    $InProg = ($Issues | Where-Object { $_.fields.status.name -match "Implementation|In Bearbeitung|In Progress|Review|Validierung|Analysis" }).Count
    $Open = $Issues.Count - $Done - $InProg

    Write-Host "  Fertig: $Done | In Arbeit: $InProg | Offen: $Open"

    # CSV
    $CsvData = $Issues | ForEach-Object {
        $Comps = if ($_.fields.components) { ($_.fields.components | ForEach-Object { $_.name }) -join ", " } else { "" }
        $Labels = if ($_.fields.labels) { $_.fields.labels -join ", " } else { "" }
        [PSCustomObject]@{
            Key = $_.key
            Typ = $_.fields.issuetype.name
            Status = $_.fields.status.name
            Prioritaet = if ($_.fields.priority) { $_.fields.priority.name } else { "" }
            Zusammenfassung = $_.fields.summary
            Komponenten = $Comps
            Labels = $Labels
            Assignee = if ($_.fields.assignee) { $_.fields.assignee.displayName } else { "" }
            Erstellt = $_.fields.created
            Aktualisiert = $_.fields.updated
        }
    }
    $CsvData | Export-Csv "$OutputDir\$BName-issues.csv" -Delimiter ";" -Encoding UTF8 -NoTypeInformation

    # Markdown
    $Md = @()
    $Md += "# $BName Analyse"
    $Md += ""
    $Md += "> Board ID: $BId | Issues: $($Issues.Count) | Fertig: $Done | In Arbeit: $InProg | Offen: $Open"
    $Md += ""
    $Md += "## Nach Typ"
    foreach ($G in ($ByType | Sort-Object Count -Descending)) { $Md += "- $($G.Name): $($G.Count)" }
    $Md += ""
    $Md += "## Nach Status"
    foreach ($G in ($ByStatus | Sort-Object Count -Descending)) { $Md += "- $($G.Name): $($G.Count)" }
    $Md += ""
    $Md += "## Top Labels"
    foreach ($E in ($ByLabel.GetEnumerator() | Sort-Object Value -Descending | Select-Object -First 20)) { $Md += "- $($E.Key): $($E.Value)" }
    $Md -join "`n" | Out-File "$OutputDir\$BName-analyse.md" -Encoding UTF8
}

Write-Host ""
Write-Host "============================================================" -ForegroundColor Green
Write-Host "  FERTIG! Ergebnisse in $OutputDir" -ForegroundColor Green
Write-Host "============================================================" -ForegroundColor Green