#if os(macOS)
import Foundation
import Observation
import RastrilloApple
import SwiftUI

/// Scene values are opaque IDs, never credentials. Reserve before opening a scene.
@MainActor @Observable final class SheetsWindows {
    struct Entry: Identifiable {
        let id: UUID
        let account: String
        let document: UInt64
        let client: NativeHTTP
        var title: String
        var isOpen = false
    }
    var entries: [Entry] = []
    var activeAccount: String?
    var createRequested = false
    var accountsRequested = false
    func reserve(account: String, document: UInt64, title: String, client: NativeHTTP) -> UUID {
        if let index = entries.firstIndex(where: { $0.account == account && $0.client.origin == client.origin && $0.document == document }) {
            var entry = entries.remove(at: index)
            entry.title = title
            entry.isOpen = true
            entries.insert(entry, at: 0)
            return entry.id
        }
        let entry = Entry(id: UUID(), account: account, document: document, client: client, title: title, isOpen: true)
        entries.insert(entry, at: 0)
        return entry.id
    }
    func updateRecents(_ documents: [(UInt64, String)], account: String, client: NativeHTTP) {
        for (document, title) in documents {
            if let index = entries.firstIndex(where: { $0.account == account && $0.client.origin == client.origin && $0.document == document }) {
                entries[index].title = title
            } else {
                entries.append(Entry(id: UUID(), account: account, document: document, client: client, title: title))
            }
        }
    }
    func setOpen(_ id: UUID, _ value: Bool) {
        if let index = entries.firstIndex(where: { $0.id == id }) { entries[index].isOpen = value }
    }
    func canSignOut(_ account: String?) -> Bool { !entries.contains { $0.account == account && $0.isOpen } }
}
extension FocusedValues { @Entry var sheetsWindowAccount: String? }
#endif