//
//  SearchField.swift
//  PrivadoVPN
//
//  Created by Zhandos Bolatbekov on 31.05.2021.
//  Copyright © 2021 Privado LLC. All rights reserved.
//

import Foundation

protocol SearchFieldOutput: AnyObject {
    func searchFieldQueryChange(text: String)
    func searchFieldCancel()
}

final class SearchField: NSSearchField {
    
    // swiftlint:disable nesting
    private enum Constants {
        
        enum Color {
            static let queryText = NSColor(red: 124, green: 134, blue: 186)
            static let background = NSColor(rgb: 0x272d4e)
            static let cancelButtonTint = NSColor(rgb: 0x7a86be)
        }
        
        enum Font {
            enum Name {
                static let query = PrivadoConstants.Font.regular
            }
            enum Size {
                static let query: CGFloat = 12.0
            }
        }
        
        enum Image {
            static let search = "search"
            static let cancel = "search_cancel"
        }
        
        enum Geometry {
            static let cancelButtonSize = CGSize(width: 12, height: 12)
            static let cancelButtonRight: CGFloat = 7.5
            static let searchIconSize = CGSize(width: 16, height: 16)
            static let cornerRadius: CGFloat = 5
        }
    }
    // swiftlint:enable nesting
    
    private weak var output: SearchFieldOutput?
    
    // MARK: - Init
    
    init(output: SearchFieldOutput?) {
        self.output = output
        
        super.init(frame: .zero)
        
        self.configureUI()
    }
    
    required init?(coder: NSCoder) { nil }
    
    // MARK: - Private
    
    private func configureUI() {
        self.translatesAutoresizingMaskIntoConstraints = false
        self.textColor = Constants.Color.queryText
        self.sendsSearchStringImmediately = false
        self.sendsWholeSearchString = false
        self.usesSingleLineMode = false
        self.action = #selector(self.onQueryChange(sender:))
        self.font = NSFont(name: Constants.Font.Name.query, size: Constants.Font.Size.query)
        self.focusRingType = .none
//        self.isBordered = false // creates bug (after tap cancel)
        self.wantsLayer = true
        self.layer?.cornerRadius = Constants.Geometry.cornerRadius
        self.layer?.backgroundColor = Constants.Color.background.cgColor
    }
    
    private func createCancelButton() -> NSButton {
        let button = NSButton()
        button.translatesAutoresizingMaskIntoConstraints = false
        button.isBordered = false
        button.wantsLayer = true
        button.layer?.backgroundColor = .clear
        button.image = NSImage(imageLiteralResourceName: Constants.Image.cancel)
            .imageWithTintColor(tintColor: Constants.Color.cancelButtonTint)
            .resize(to: Constants.Geometry.cancelButtonSize)
        button.action = #selector(self.onCancelTap)
        button.target = self
        return button
    }
    
    @objc
    private func onQueryChange(sender: NSSearchField) {
        self.output?.searchFieldQueryChange(text: sender.stringValue)
    }
    
    @objc
    private func onCancelTap() {
        self.output?.searchFieldCancel()
    }
}