//
//  Filter.swift
//  Pachyderm
//
//  Created by Shadowfacts on 9/9/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import Foundation

public class Filter: Decodable, ClientModel {
    var client: Client!
    
    public let id: String
    public var phrase: String
    private var context: [String]
    public var expiresAt: Date?
    public var irreversible: Bool
    public var wholeWord: Bool
    
    public var contexts: [Context] {
        get {
            return context.compactMap(Context.init)
        }
        set {
            context = contexts.contextStrings
        }
    }
    
    public func update(completion: Client.Callback<Filter>?) {
        let request = Request<Filter>(method: .put, path: "/api/v1/filters/\(id)", body: .parameters([
            "phrase" => phrase,
            "irreversible" => irreversible,
            "whole_word" => wholeWord,
            "expires_at" => expiresAt
        ] + "context" => context))
        client.run(request) { result in
            completion?(result)
        }
    }
    
    public func delete(completion: @escaping Client.Callback<Empty>) {
        let request = Request<Empty>(method: .delete, path: "/api/v1/filters/\(id)")
        client.run(request, completion: completion)
    }
    
    private enum CodingKeys: String, CodingKey {
        case id
        case phrase
        case context
        case expiresAt = "expires_at"
        case irreversible
        case wholeWord = "whole_word"
    }
}

extension Filter {
    public enum Context: String, Decodable {
        case home
        case notifications
        case `public`
        case thread
    }
}

extension Array where Element == Filter.Context {
    var contextStrings: [String] {
        return map { $0.rawValue }
    }
}