//
//  EQNCustomAnnotationView.swift
//  Earthquake Network
//
//  Created by Andrea Busi on 06/03/21.
//  Copyright © 2021 Earthquake Network. All rights reserved.
//

import Foundation
import MapKit


@objc
public class EQNCustomAnnotationView: MKAnnotationView {
    @objc static let Identifier = "EQNCustomAnnotationView"
    private static let AnnotationFrame = CGRect(x: 0, y: 0, width: 40, height: 40)
    
    @objc public override var image: UIImage? {
        set { imageView.image = newValue }
        get { imageView.image }
    }
    
    @objc public var title: String? {
        set { label.text = newValue }
        get { label.text }
    }
    
    // MARK: - UI
    
    private lazy var imageView: UIImageView = {
        let imageView = UIImageView()
        imageView.contentMode = .scaleAspectFit
        return imageView
    }()
    
    private lazy var label: UILabel = {
        let label = UILabel()
        label.font = UIFont.systemFont(ofSize: 12, weight: .medium)
        label.textAlignment = .center
        return label
    }()
    
    // MARK: - Init
    
    @objc
    override init(annotation: MKAnnotation?, reuseIdentifier: String?) {
        super.init(annotation: annotation, reuseIdentifier: reuseIdentifier)
        
        frame = Self.AnnotationFrame
        centerOffset = CGPoint(x: 0, y: -frame.size.height / 2.0)
        
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func setupUI() {
        backgroundColor = .clear
        
        let labelFrame =  CGRect(x: 0, y: 0, width: Self.AnnotationFrame.width, height: 15)
        label.frame = labelFrame
        addSubview(label)
        
        let imageViewHeight = Self.AnnotationFrame.height - labelFrame.height
        imageView.frame = CGRect(x: 0, y: labelFrame.height, width: Self.AnnotationFrame.width, height: imageViewHeight)
        addSubview(imageView)
    }
}