//
//  Preferences.swift
//  Tusker
//
//  Created by Shadowfacts on 8/28/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import Foundation
import Pachyderm
import SwiftUI
import Combine

class Preferences: Codable, BindableObject {
    
    static var shared: Preferences = load()
    
    private static var documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
    private static var archiveURL = Preferences.documentsDirectory.appendingPathComponent("preferences").appendingPathExtension("plist")
    
    static func save() {
        let encoder = PropertyListEncoder()
        let data = try? encoder.encode(shared)
        try? data?.write(to: archiveURL, options: .noFileProtection)
    }
    
    static func load() -> Preferences {
        let decoder = PropertyListDecoder()
        if let data = try? Data(contentsOf: archiveURL),
            let preferences = try? decoder.decode(Preferences.self, from: data) {
            return preferences
        }
        return Preferences()
    }
    
    private init() {}
    
    let didChange = PassthroughSubject<Preferences, Never>()
    
    // MARK: - Appearance
    var showRepliesInProfiles = false { didSet { didChange.send(self) } }
    var avatarStyle = AvatarStyle.roundRect { didSet { didChange.send(self) } }
    var hideCustomEmojiInUsernames = false { didSet { didChange.send(self) } }
    
    // MARK: - Behavior
    var defaultPostVisibility = Status.Visibility.public { didSet { didChange.send(self) } }
    var automaticallySaveDrafts = true { didSet { didChange.send(self) } }
    var openLinksInApps = true { didSet { didChange.send(self) } }
    
    // MARK: - Advanced
    var silentActions: [String: Permission] = [:] { didSet { didChange.send(self) } }
    var statusContentType: StatusContentType = .plain { didSet { didChange.send(self) } }
    
}

extension PassthroughSubject: Codable {
    public convenience init(from decoder: Decoder) throws {
        self.init()
    }
    
    public func encode(to encoder: Encoder) throws {
        
    }
}

extension Preferences {
    enum Permission: String, Codable {
        case undecided, accepted, rejected
    }
}