import CoreMedia
import DropTwoCore
import Foundation

// Prüfstein fürs Core-Framework (Schritt 3 der Umsetzungsreihenfolge):
// echte Dateien durchjagen und die Ausgabequalität von CropEngine bewerten.
// Nutzt dieselbe ConversionPipeline wie später die App, damit CLI und
// Oberfläche garantiert dasselbe tun.

let arguments = Array(CommandLine.arguments.dropFirst())

guard arguments.count >= 2 else {
    print("Usage: droptwo <zielordner> <datei> [<datei> ...]")
    exit(0)
}

let outputDirectory = URL(fileURLWithPath: arguments[0], isDirectory: true)
let sourcePaths = arguments.dropFirst()

func describe(_ info: VideoInfo) -> String {
    let seconds = CMTimeGetSeconds(info.duration)
    return "\(Int(info.pixelSize.width))×\(Int(info.pixelSize.height)), \(info.codec), "
        + "\(String(format: "%.2f", info.frameRate)) fps, \(String(format: "%.2f", seconds))s, "
        + "Audio: \(info.hasAudioTrack ? "ja" : "nein")"
}

func fileSizeInMB(_ url: URL) -> Double? {
    guard let size = try? FileManager.default.attributesOfItem(atPath: url.path)[.size] as? Int else {
        return nil
    }
    return Double(size) / 1_000_000
}

for sourcePath in sourcePaths {
    let sourceURL = URL(fileURLWithPath: sourcePath)
    let fileName = sourceURL.lastPathComponent
    let start = Date()

    let outcome = await ConversionPipeline.process(sourceURL: sourceURL, outputRootDirectory: outputDirectory)

    switch outcome {
    case .skipped(let fileName, let reason):
        print("\(fileName): übersprungen (\(reason))")
    case .rejected(let fileName, let reason):
        print("\(fileName): abgelehnt (\(reason))")
    case .failed(let fileName, let error):
        print("\(fileName): Fehler — \(error)")
    case .succeeded(let success):
        let elapsed = Date().timeIntervalSince(start)
        let sizeMB = fileSizeInMB(success.croppedDestination).map { String(format: "%.1f MB", $0) } ?? "?"
        print(fileName)
        print("  Quelle: \(describe(success.sourceInfo))")
        print("  -> \(success.croppedDestination.lastPathComponent): \(describe(success.croppedInfo)), \(sizeMB), \(String(format: "%.1f", elapsed))s Renderzeit")
    }
}