<#
.SYNOPSIS
    Export a Confluence space page tree to local files (HTML + Markdown + JSON index)
.USAGE
    powershell -ExecutionPolicy Bypass -File scripts/confluence-export.ps1
#>

# Load config and shared functions
. "$PSScriptRoot/../config.ps1"
. "$PSScriptRoot/lib/confluence-api.ps1"

Write-Host "============================================================"
Write-Host "  Confluence Export - $SpaceKey"
Write-Host "============================================================"
Write-Host "  URL: $ConfluenceUrl"
Write-Host "  Root Page: $RootPageId"
Write-Host ""

function Export-PageTree {
    param([string]$PageId, [string]$ParentPath, [int]$Depth = 0, [ref]$Counter)
    $Indent = "  " * $Depth
    $Counter.Value++

    $Page = Get-PageContent -PageId $PageId
    if ($null -eq $Page) { return $null }

    $Title = [string]$Page.title
    Write-Host "$Indent[$($Counter.Value)] $Title"

    $Labels = @()
    if ($Page.metadata -and $Page.metadata.labels -and $Page.metadata.labels.results) {
        $Labels = @($Page.metadata.labels.results | ForEach-Object { $_.name })
    }
    $VersionNum = if ($Page.version) { $Page.version.number } else { 0 }

    $PageInfo = [PSCustomObject]@{
        id = $Page.id; title = $Title; version = $VersionNum
        labels = $Labels; depth = $Depth; path = "$ParentPath/$Title"; children = @()
    }

    # Save content
    $HtmlContent = ""
    $TextContent = ""
    if ($Page.body -and $Page.body.storage) {
        $HtmlContent = [string]$Page.body.storage.value
        $TextContent = Convert-HtmlToText $HtmlContent
    }

    $SafeTitle = $Title -replace '[\\/:*?"<>|]', '_'
    if ($SafeTitle.Length -gt 80) { $SafeTitle = $SafeTitle.Substring(0, 80) }
    $PageDir = Join-Path $OutputDir "pages"
    New-Item -ItemType Directory -Path $PageDir -Force | Out-Null

    # Markdown
    $MdLines = @("# $Title", "", "> Page ID: $($Page.id)", "> Version: $VersionNum", "> Path: $($PageInfo.path)", "> Labels: $(($Labels) -join ', ')", "", "---", "", $TextContent)
    $MdPath = Join-Path $PageDir "$($Page.id)_$SafeTitle.md"
    $MdLines -join "`n" | Out-File -FilePath $MdPath -Encoding UTF8

    # HTML
    $HtmlPath = Join-Path $PageDir "$($Page.id)_$SafeTitle.html"
    $HtmlContent | Out-File -FilePath $HtmlPath -Encoding UTF8

    # Children
    $Children = @(Get-ChildPages -PageId $PageId)
    $ChildInfos = @()
    foreach ($Child in $Children) {
        $ChildInfo = Export-PageTree -PageId $Child.id -ParentPath $PageInfo.path -Depth ($Depth + 1) -Counter $Counter
        if ($null -ne $ChildInfo) { $ChildInfos += $ChildInfo }
    }
    $PageInfo.children = $ChildInfos
    return $PageInfo
}

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

Write-Host ">> Testing connection..." -ForegroundColor Yellow
$TestResult = Invoke-ConfluenceApi -Endpoint "/space/$SpaceKey"
if ($null -eq $TestResult) { Write-Host "  Connection failed." -ForegroundColor Red; exit 1 }
Write-Host "  Space: $($TestResult.name) ($SpaceKey)" -ForegroundColor Green

Write-Host ""
Write-Host ">> Exporting page tree from $RootPageId..." -ForegroundColor Yellow
$Counter = [ref]0
$Tree = Export-PageTree -PageId $RootPageId -ParentPath "" -Depth 0 -Counter $Counter

Write-Host ""
Write-Host ">> $($Counter.Value) pages exported" -ForegroundColor Green

# JSON index
$JsonPath = Join-Path $OutputDir "page-index.json"
$Tree | ConvertTo-Json -Depth 20 | Out-File -FilePath $JsonPath -Encoding UTF8
Write-Host "  Index: $JsonPath"
Write-Host "============================================================" -ForegroundColor Green