//
  //  MapError.swift
  //  ObjectMapper
  //
  //  Created by Tristan Himmelman on 2016-09-26.
  //
  //  The MIT License (MIT)
  //
  //  Copyright (c) 2014-2016 Hearst
  //
  //  Permission is hereby granted, free of charge, to any person obtaining a copy
  //  of this software and associated documentation files (the "Software"), to deal
  //  in the Software without restriction, including without limitation the rights
  //  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  //  copies of the Software, and to permit persons to whom the Software is
  //  furnished to do so, subject to the following conditions:
  //
  //  The above copyright notice and this permission notice shall be included in
  //  all copies or substantial portions of the Software.
  //
  //  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  //  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  //  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  //  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  //  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  //  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  //  THE SOFTWARE.
  
  import Foundation
  
  public struct MapError: Error {
  	public var key: String?
  	public var currentValue: Any?
  	public var reason: String?
  	public var file: StaticString?
  	public var function: StaticString?
  	public var line: UInt?
  	
  	public init(key: String?, currentValue: Any?, reason: String?, file: StaticString? = nil, function: StaticString? = nil, line: UInt? = nil) {
  		self.key = key
  		self.currentValue = currentValue
  		self.reason = reason
  		self.file = file
  		self.function = function
  		self.line = line
  	}
  }
  
  extension MapError: CustomStringConvertible {
  	
  	private var location: String? {
  		guard let file = file, let function = function, let line = line else { return nil }
  		let fileName = ((String(describing: file).components(separatedBy: "/").last ?? "").components(separatedBy: ".").first ?? "")
  		return "\(fileName).\(function):\(line)"
  	}
  	
  	public var description: String {
  		let info: [(String, Any?)] = [
  			("- reason", reason),
  			("- location", location),
  			("- key", key),
  			("- currentValue", currentValue),
  			]
  		let infoString = info.map { "\($0): \($1 ?? "nil")" }.joined(separator: "
  ")
  		return "Got an error while mapping.
  \(infoString)"
  	}
  	
  }