//
//  XCBManager.swift
//  Tusker
//
//  Created by Shadowfacts on 9/23/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import UIKit

class XCBManager {
    
    static var specs: [XCallbackURLSpec] = [
        XCallbackURLSpec(path: "/postStatus", arguments: ["mentioning": true, "text": true], handle: postStatus)
    ]
    
    static var currentSession: XCBSession?
    
    static func handle(url: URL) -> Bool {
        guard let components = URLComponents(url: url, resolvingAgainstBaseURL: true) else { return false }
        if let spec = specs.first(where: { $0.matches(components) }) {
            let xcbURL = XCallbackURL(spec: spec, components: components)
            return spec.handle(xcbURL)
        }
        return false
    }
    
    static func didComplete(session type: XCBSessionType, result: XCBSessionResult) {
        if let currentSession = currentSession,
            currentSession.type == type {
            currentSession.complete(with: result)
            self.currentSession = nil
        }
    }
    
    private static func createSession(type: XCBSessionType, url: XCallbackURL) -> XCBSession {
        let session = XCBSession(type: type, success: url.success, error: url.error, cancel: url.cancel)
        currentSession = session
        return session
    }
    
    static func postStatus(_ url: XCallbackURL) -> Bool {
        let mentioning = url.arguments["mentioning"]
        let text = url.arguments["text"]
        if let window = UIApplication.shared.keyWindow {
            let session = createSession(type: .postStatus, url: url)
            let vc = ComposeViewController.create(for: session, mentioning: mentioning, text: text)
            window.rootViewController?.present(vc, animated: true)
            return true
        }
        return false
    }
    
}