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

import Foundation
import Pachyderm
import Combine

class Preferences: Codable, ObservableObject {

    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() {}
    
    required init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        
        self.theme = try container.decode(UIUserInterfaceStyle.self, forKey: .theme)
        self.avatarStyle = try container.decode(AvatarStyle.self, forKey: .avatarStyle)
        self.hideCustomEmojiInUsernames = try container.decode(Bool.self, forKey: .hideCustomEmojiInUsernames)
        self.showIsStatusReplyIcon = try container.decode(Bool.self, forKey: .showIsStatusReplyIcon)
        self.alwaysShowStatusVisibilityIcon = try container.decode(Bool.self, forKey: .alwaysShowStatusVisibilityIcon)
        
        self.defaultPostVisibility = try container.decode(Status.Visibility.self, forKey: .defaultPostVisibility)
        self.automaticallySaveDrafts = try container.decode(Bool.self, forKey: .automaticallySaveDrafts)
        self.requireAttachmentDescriptions = try container.decode(Bool.self, forKey: .requireAttachmentDescriptions)
        self.contentWarningCopyMode = try container.decode(ContentWarningCopyMode.self, forKey: .contentWarningCopyMode)
        self.mentionReblogger = try container.decode(Bool.self, forKey: .mentionReblogger)
        
        self.blurAllMedia = try container.decode(Bool.self, forKey: .blurAllMedia)
        self.automaticallyPlayGifs = try container.decode(Bool.self, forKey: .automaticallyPlayGifs)
        
        self.openLinksInApps = try container.decode(Bool.self, forKey: .openLinksInApps)
        self.useInAppSafari = try container.decode(Bool.self, forKey: .useInAppSafari)
        self.inAppSafariAutomaticReaderMode = try container.decode(Bool.self, forKey: .inAppSafariAutomaticReaderMode)
        self.expandAllContentWarnings = try container.decodeIfPresent(Bool.self, forKey: .expandAllContentWarnings) ?? false
        self.collapseLongPosts = try container.decodeIfPresent(Bool.self, forKey: .collapseLongPosts) ?? true
        self.oppositeCollapseKeywords = try container.decodeIfPresent([String].self, forKey: .oppositeCollapseKeywords) ?? []
        self.confirmBeforeReblog = try container.decodeIfPresent(Bool.self, forKey: .confirmBeforeReblog) ?? false
        
        self.showFavoriteAndReblogCounts = try container.decode(Bool.self, forKey: .showFavoriteAndReblogCounts)
        self.defaultNotificationsMode = try container.decode(NotificationsMode.self, forKey: .defaultNotificationsType)
        self.grayscaleImages = try container.decodeIfPresent(Bool.self, forKey: .grayscaleImages) ?? false
        
        self.silentActions = try container.decode([String: Permission].self, forKey: .silentActions)
        self.statusContentType = try container.decode(StatusContentType.self, forKey: .statusContentType)
    }
    
    func encode(to encoder: Encoder) throws {
        var container = encoder.container(keyedBy: CodingKeys.self)
        
        try container.encode(theme, forKey: .theme)
        try container.encode(avatarStyle, forKey: .avatarStyle)
        try container.encode(hideCustomEmojiInUsernames, forKey: .hideCustomEmojiInUsernames)
        try container.encode(showIsStatusReplyIcon, forKey: .showIsStatusReplyIcon)
        try container.encode(alwaysShowStatusVisibilityIcon, forKey: .alwaysShowStatusVisibilityIcon)
        
        try container.encode(defaultPostVisibility, forKey: .defaultPostVisibility)
        try container.encode(automaticallySaveDrafts, forKey: .automaticallySaveDrafts)
        try container.encode(requireAttachmentDescriptions, forKey: .requireAttachmentDescriptions)
        try container.encode(contentWarningCopyMode, forKey: .contentWarningCopyMode)
        try container.encode(mentionReblogger, forKey: .mentionReblogger)
        
        try container.encode(blurAllMedia, forKey: .blurAllMedia)
        try container.encode(automaticallyPlayGifs, forKey: .automaticallyPlayGifs)
        
        try container.encode(openLinksInApps, forKey: .openLinksInApps)
        try container.encode(useInAppSafari, forKey: .useInAppSafari)
        try container.encode(inAppSafariAutomaticReaderMode, forKey: .inAppSafariAutomaticReaderMode)
        try container.encode(expandAllContentWarnings, forKey: .expandAllContentWarnings)
        try container.encode(collapseLongPosts, forKey: .collapseLongPosts)
        try container.encode(oppositeCollapseKeywords, forKey: .oppositeCollapseKeywords)
        try container.encode(confirmBeforeReblog, forKey: .confirmBeforeReblog)
        
        try container.encode(showFavoriteAndReblogCounts, forKey: .showFavoriteAndReblogCounts)
        try container.encode(defaultNotificationsMode, forKey: .defaultNotificationsType)
        try container.encode(grayscaleImages, forKey: .grayscaleImages)
        
        try container.encode(silentActions, forKey: .silentActions)
        try container.encode(statusContentType, forKey: .statusContentType)
    }
    
    // MARK: Appearance
    @Published var theme = UIUserInterfaceStyle.unspecified
    @Published var avatarStyle = AvatarStyle.roundRect
    @Published var hideCustomEmojiInUsernames = false
    @Published var showIsStatusReplyIcon = false
    @Published var alwaysShowStatusVisibilityIcon = false
    
    // MARK: Composing
    @Published var defaultPostVisibility = Status.Visibility.public
    @Published var automaticallySaveDrafts = true
    @Published var requireAttachmentDescriptions = false
    @Published var contentWarningCopyMode = ContentWarningCopyMode.asIs
    @Published var mentionReblogger = false
    
    // MARK: Media
    @Published var blurAllMedia = false
    @Published var automaticallyPlayGifs = true
    
    // MARK: Behavior
    @Published var openLinksInApps = true
    @Published var useInAppSafari = true
    @Published var inAppSafariAutomaticReaderMode = false
    @Published var expandAllContentWarnings = false
    @Published var collapseLongPosts = true
    @Published var oppositeCollapseKeywords: [String] = []
    @Published var confirmBeforeReblog = false
    
    // MARK: Digital Wellness
    @Published var showFavoriteAndReblogCounts = true
    @Published var defaultNotificationsMode = NotificationsMode.allNotifications
    @Published var grayscaleImages = false
    
    // MARK: Advanced
    @Published var silentActions: [String: Permission] = [:]
    @Published var statusContentType: StatusContentType = .plain

    private enum CodingKeys: String, CodingKey {
        case theme
        case avatarStyle
        case hideCustomEmojiInUsernames
        case showIsStatusReplyIcon
        case alwaysShowStatusVisibilityIcon
        
        case defaultPostVisibility
        case automaticallySaveDrafts
        case requireAttachmentDescriptions
        case contentWarningCopyMode
        case mentionReblogger
        
        case blurAllMedia
        case automaticallyPlayGifs
        
        case openLinksInApps
        case useInAppSafari
        case inAppSafariAutomaticReaderMode
        case expandAllContentWarnings
        case collapseLongPosts
        case oppositeCollapseKeywords
        case confirmBeforeReblog
        
        case showFavoriteAndReblogCounts
        case defaultNotificationsType
        case grayscaleImages
        
        case silentActions
        case statusContentType
    }
    
}

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

extension UIUserInterfaceStyle: Codable {}