#!/usr/bin/env swift

import AppKit
import Foundation

let paths = CommandLine.arguments.dropFirst()

guard !paths.isEmpty else {
    fputs("usage: copy_files_to_clipboard.swift <path> [path...]\n", stderr)
    exit(64)
}

let urls = paths.map { URL(fileURLWithPath: $0).standardizedFileURL }
let missing = urls.filter { !FileManager.default.fileExists(atPath: $0.path) }

guard missing.isEmpty else {
    for url in missing {
        fputs("missing file: \(url.path)\n", stderr)
    }
    exit(66)
}

let pasteboard = NSPasteboard.general
pasteboard.clearContents()

let wroteObjects = pasteboard.writeObjects(urls as [NSURL])

let filenamesType = NSPasteboard.PasteboardType("NSFilenamesPboardType")
let pathsList = urls.map(\.path)
let wroteFilenames = pasteboard.setPropertyList(pathsList, forType: filenamesType)
let wrotePlainText = pasteboard.setString(pathsList.joined(separator: "\n"), forType: .string)

if wroteObjects || wroteFilenames || wrotePlainText {
    let itemCount = pasteboard.pasteboardItems?.count ?? 0
    fputs("pasteboard files=\(urls.count) items=\(itemCount) objects=\(wroteObjects) filenames=\(wroteFilenames) text=\(wrotePlainText)\n", stderr)
    exit(0)
}

fputs("failed to write file URLs to pasteboard\n", stderr)
exit(1)