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

import Foundation

struct XCallbackURLSpec {
    
    let path: String
    let arguments: [String: Bool]
    let handle: (XCallbackURL) -> Bool
    
    init(path: String, arguments: [String: Bool], handle: @escaping (XCallbackURL) -> Bool) {
        self.path = path
        self.arguments = arguments
        self.handle = handle
    }
    
}

struct XCallbackURL {
    let path: String
    let arguments: [String: String]
    let success: URL?
    let error: URL?
    let cancel: URL?
    
    init(spec: XCallbackURLSpec, components: URLComponents) {
        self.path = spec.path
        let queryItems = components.queryItems!
        self.arguments = spec.arguments.reduce(into: [String: String](), { (result, el) in
            if let value = queryItems.first(where: { $0.name == el.key })?.value {
                result[el.key] = value
            }
        })
        success = queryItems.first(where: { $0.name == "x-success" }).flatMap { $0.value }.flatMap { URL(string: $0) }
        error = queryItems.first(where: { $0.name == "x-error" }).flatMap { $0.value }.flatMap { URL(string: $0) }
        cancel = queryItems.first(where: { $0.name == "x-cancel" }).flatMap { $0.value }.flatMap { URL(string: $0) }
    }
}

extension XCallbackURLSpec {
    func matches(_ components: URLComponents) -> Bool {
        return path == components.path && arguments.matches(components)
    }
}

extension Dictionary where Key == String, Value == Bool {
    func matches(_ components: URLComponents) -> Bool {
        for (name, optional) in self {
            if (!optional && components.queryItems?.first(where: { $0.name == name }) == nil) {
                return false
            }
        }
        return true
    }
}