#HOW TO RUN THIS THING:
# SAVE THIS FILE AS ytrescue.ps1
#THROW IT INTO WHATEVER FOLDER YOU WANT
#HAVE yt-dlp.exe EITHER:
#- IN PATH
# - OR SITTING NEXT TO THIS SCRIPT
#OPEN powershell.exe
#RUN:
#					powershell -ExecutionPolicy Bypass -File .\ytrescue.ps1 "C:\MOVIES"
#
# NOTES FOR THE BRAVE:
# - CHANGE "C:\MOVIES" TO YOUR ACTUAL FOLDER
# - ffmpeg MAY BE NEEDED ??
#- SCRIPT SCANS VIDEO FILE NAMES, STEALS YT ID, REDOWNLOADS CLEAN VERSION
#IF YOUR FILENAMES ARE GARBAGE, IT SKIPS THEM. YOU DESERVED iT


param([string]$Dir = ".")

if (-not (Test-Path -LiteralPath $Dir)) {
    Write-Host "DIR NOT REAL: $Dir"
    exit 1
}

Set-Location -LiteralPath $Dir

$ytdlp = $null
if (Get-Command yt-dlp.exe -ErrorAction SilentlyContinue) {
    $ytdlp = "yt-dlp.exe"
} elseif (Test-Path ".\yt-dlp.exe") {
    $ytdlp = ".\yt-dlp.exe"
} else {
    Write-Host "YT-DLP NOT FOUND. NOT IN PATH. NOT IN FOLDER. YOU HAVE NOTHING."
    exit 1
}

$fmt = "bestvideo[height<=800][vcodec!=av01]+bestaudio[tbr<100]"
$out = '%(title)s [%(resolution)s %(id)s] - %(uploader)s - %(upload_date>%Y-%m-%d)s.%(ext)s'
$ok = 0; $fail = 0; $skip = 0

$files = Get-ChildItem -File | Where-Object { $_.Extension -match '^\.(mkv|webm|mp4|avi|flv|m4v|mov|ts)$' }

if ($files.Count -eq 0) {
    Write-Host "NO VIDEO FILES. FOLDER IS BARREN."
    exit 1
}

Write-Host "SCANNING: $Dir ($($files.Count) files)"

foreach ($f in $files) {
    $vid = $null
    $brackets = [regex]::Matches($f.BaseName, '\[([^\]]+)\]')
    foreach ($m in $brackets) {
        $tokens = $m.Groups[1].Value -split '\s+'
        foreach ($t in $tokens) {
            if ($t -match '^[A-Za-z0-9_-]{11}$') { $vid = $t }
        }
    }
    if (-not $vid) {
        $all = [regex]::Matches($f.BaseName, '[A-Za-z0-9_-]{11}')
        if ($all.Count -gt 0) { $vid = $all[$all.Count - 1].Value }
    }
    if (-not $vid) {
        Write-Host "[SKIP] BAD NAME. NO ID FOUND: $($f.Name)"
        $skip++
        continue
    }

    $url = "https://www.youtube.com/watch?v=$vid"
    Write-Host "[GET]  $vid <- $($f.Name)"

    & $ytdlp -ciw -f $fmt --embed-metadata --embed-info-json --add-metadata --embed-thumbnail --convert-thumbnails jpg -o $out $url

    if ($LASTEXITCODE -eq 0) {
        Write-Host "[OK]   $vid DOWNLOADED. NICE."
        $ok++
    } else {
        Write-Host "[FAIL] $vid ERROR ERRORED. RIP."
        $fail++
    }
}

Write-Host ""
Write-Host "DONE. OK=$ok FAIL=$fail SKIP=$skip TOTAL=$($files.Count)"
if ($fail -gt 0) { Write-Host "SOME FAILED. SKILL ISSUE OR DELETED VIDEOS." }
if ($skip -gt 0) { Write-Host "SOME SKIPPED. FILENAMES UNREADABLE. RENAME YOUR STUFF." }