//
//  PreviewViewControllerProvider.swift
//  Tusker
//
//  Created by Shadowfacts on 10/10/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import UIKit
import SafariServices
import Pachyderm

protocol MenuPreviewProvider {
    
    typealias PreviewProviders = (content: UIContextMenuContentPreviewProvider, actions: () -> [UIAction])
    
    func getPreviewProviders(for location: CGPoint, sourceViewController: UIViewController) -> PreviewProviders?
    
}

extension MenuPreviewProvider {
    
    fileprivate func present(_ vc: UIViewController) {
        UIApplication.shared.keyWindow!.rootViewController!.present(vc, animated: true)
    }
    
    func actionsForProfile(accountID: String) -> [UIAction] {
        guard let account = MastodonCache.account(for: accountID) else { return [] }
        return [
            createAction(identifier: "openinsafari", title: "Open in Safari", systemImageName: "safari", handler: { (_) in
                self.present(SFSafariViewController(url: account.url))
            }),
            createAction(identifier: "sendmessage", title: "Send Message", systemImageName: "envelope", handler: { (_) in
                self.present(UINavigationController(rootViewController: ComposeViewController(mentioningAcct: account.acct)))
            }),
            createAction(identifier: "share", title: "Share...", systemImageName: "square.and.arrow.up", handler: { (_) in
                self.present(UIActivityViewController(activityItems: [account.url], applicationActivities: nil))
            })
        ]
    }
    
    func actionsForURL(_ url: URL) -> [UIAction] {
        return [
            createAction(identifier: "openinsafari", title: "Open in Safari", systemImageName: "safari", handler: { (_) in
                self.present(SFSafariViewController(url: url))
            }),
            createAction(identifier: "share", title: "Share...", systemImageName: "square.and.arrow.up", handler: { (_) in
                self.present(UIActivityViewController(activityItems: [url], applicationActivities: nil))
            })
        ]
    }
    
    func actionsForHashtag(_ hashtag: Hashtag) -> [UIAction] {
        return actionsForURL(hashtag.url)
    }
    
    func actionsForStatus(statusID: String) -> [UIAction] {
        guard let status = MastodonCache.status(for: statusID) else { return [] }
        return [
            createAction(identifier: "reply", title: "Reply", systemImageName: "arrowshape.turn.up.left", handler: { (_) in
                self.present(UINavigationController(rootViewController: ComposeViewController(inReplyTo: statusID)))
            }),
            createAction(identifier: "openinsafari", title: "Open in Safari", systemImageName: "safari", handler: { (_) in
                self.present(SFSafariViewController(url: status.url!))
            }),
            createAction(identifier: "share", title: "Share...", systemImageName: "square.and.arrow.up", handler: { (_) in
                self.present(UIActivityViewController(activityItems: [status.url!], applicationActivities: nil))
            })
        ]
    }

    private func createAction(identifier: String, title: String, systemImageName: String, handler: @escaping UIActionHandler) -> UIAction {
        return UIAction(title: title, image: UIImage(systemName: systemImageName), identifier: UIAction.Identifier(identifier), discoverabilityTitle: nil, attributes: [], state: .off, handler: handler)
    }
    
}