# GifTag Medya Helper - Windows PowerShell
# Usage: PowerShell -ExecutionPolicy Bypass -File .\giftag_medya.ps1

param(
    [string]$EspUrl = $env:GIFTAG_ESP_URL
)

$ErrorActionPreference = "SilentlyContinue"
$SID = "pc_ps"
$LastKey = ""

function Normalize-EspUrl([string]$url) {
    if ([string]::IsNullOrWhiteSpace($url)) { return "" }
    $u = $url.Trim()
    if (-not $u.StartsWith("http://") -and -not $u.StartsWith("https://")) {
        $u = "http://$u"
    }
    return $u.TrimEnd("/")
}

function Test-GifTag([string]$url) {
    try {
        Invoke-RestMethod -Uri "$url/api/now_playing_status" -TimeoutSec 2 | Out-Null
        return $true
    } catch {
        try {
            Invoke-RestMethod -Uri "$url/api/info" -TimeoutSec 2 | Out-Null
            return $true
        } catch {
            return $false
        }
    }
}

function Resolve-GifTag {
    $candidates = @(
        (Normalize-EspUrl $EspUrl),
        (Normalize-EspUrl "http://giftag.local"),
        (Normalize-EspUrl "http://192.168.4.1")
    ) | Where-Object { $_ } | Select-Object -Unique

    foreach ($candidate in $candidates) {
        if (Test-GifTag $candidate) { return $candidate }
    }

    Write-Host "GifTag ESP bulunamadi. ESP URL/IP girin (ornek: http://192.168.1.50)." -ForegroundColor Yellow
    $manual = Normalize-EspUrl (Read-Host "ESP URL")
    if ($manual -and (Test-GifTag $manual)) { return $manual }
    throw "GifTag ESP'ye baglanilamadi."
}

function Await-WinRt($operation, [Type]$resultType) {
    $asTask = ([System.WindowsRuntimeSystemExtensions].GetMethods() |
        Where-Object {
            $_.Name -eq "AsTask" -and
            $_.IsGenericMethodDefinition -and
            $_.GetParameters().Count -eq 1
        } | Select-Object -First 1).MakeGenericMethod($resultType)
    $task = $asTask.Invoke($null, @($operation))
    return $task.GetAwaiter().GetResult()
}

Add-Type -AssemblyName System.Runtime.WindowsRuntime | Out-Null
[Windows.Media.Control.GlobalSystemMediaTransportControlsSessionManager, Windows.Media.Control, ContentType = WindowsRuntime] | Out-Null
[Windows.Media.Control.GlobalSystemMediaTransportControlsSessionMediaProperties, Windows.Media.Control, ContentType = WindowsRuntime] | Out-Null

$BaseUrl = Resolve-GifTag
Write-Host "GifTag Medya helper calisiyor: $BaseUrl" -ForegroundColor Green

$manager = Await-WinRt `
    ([Windows.Media.Control.GlobalSystemMediaTransportControlsSessionManager]::RequestAsync()) `
    ([Windows.Media.Control.GlobalSystemMediaTransportControlsSessionManager])

while ($true) {
    try {
        $session = $manager.GetCurrentSession()
        if ($null -eq $session) {
            Start-Sleep -Seconds 2
            continue
        }

        $props = Await-WinRt $session.TryGetMediaPropertiesAsync() `
            ([Windows.Media.Control.GlobalSystemMediaTransportControlsSessionMediaProperties])
        $timeline = $session.GetTimelineProperties()
        $playback = $session.GetPlaybackInfo()

        $title = [string]$props.Title
        if ([string]::IsNullOrWhiteSpace($title)) {
            Start-Sleep -Seconds 2
            continue
        }

        $artist = [string]$props.Artist
        $album = [string]$props.AlbumTitle
        $positionMs = [int64]$timeline.Position.TotalMilliseconds
        $durationMs = [int64]$timeline.EndTime.TotalMilliseconds
        $isPlaying = ($playback.PlaybackStatus.ToString() -eq "Playing")
        $key = "$title|$artist|$album|$durationMs|$isPlaying"

        $body = @{
            source_id = $SID
            source_name = "GifTag Windows Helper"
            title = $title
            artist = $artist
            album = $album
            position_ms = [Math]::Max(0, $positionMs)
            duration_ms = [Math]::Max(0, $durationMs)
            is_playing = $isPlaying
            media_key = $key
        } | ConvertTo-Json -Depth 4 -Compress

        $endpoint = if ($key -ne $LastKey) { "/api/now_playing" } else { "/api/now_playing_tick" }
        Invoke-RestMethod -Uri "$BaseUrl$endpoint" -Method Post -ContentType "application/json" -Body $body -TimeoutSec 3 | Out-Null
        $LastKey = $key
    } catch {
        Write-Host ("GifTag gonderim hatasi: " + $_.Exception.Message) -ForegroundColor DarkYellow
    }

    Start-Sleep -Seconds 2
}