//
//  MapAnnotationView.swift
//  Runner
//
//  Created by Groot on 2025/5/9.
//

import UIKit
import MapKit

class MapAnnotationView: MKAnnotationView {
    
    static let identifier: String = "MapAnnotationView"

    var marker: ATMapMarker?
    
    var annotationSelected: Bool {
        return (marker?.isSelected ?? false) || self.isSelected
    }
    
    private let imageView = UIImageView()
    private var uiImage: UIImage? {
        // 先尝试从主资源束加载
        let imageName = marker?.markerType.imageName(selected: annotationSelected) ?? ""
        print(imageName)
        if let image = UIImage(named: imageName) {
            return image
        }
        
        // 尝试从插件资源束加载
        let bundleURL = Bundle(for: MapAnnotationView.self).url(forResource: "map_mapkit_ios_resources", withExtension: "bundle")
        if let bundleURL = bundleURL, let resourceBundle = Bundle(url: bundleURL) {
            return UIImage(named: imageName, in: resourceBundle, compatibleWith: nil)
        }
        
        return nil
    }
    
    override init(annotation: MKAnnotation?, reuseIdentifier: String?) {
        self.marker = annotation as? ATMapMarker
        super.init(annotation: annotation, reuseIdentifier: reuseIdentifier)
        
        self.isEnabled = marker?.markerType.supportSelected ?? false
        self.isHidden = false
        // 添加图片显示
        setupImageView()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func setupImageView() {
        // 设置默认图像
        imageView.image = uiImage
        imageView.contentMode = .scaleAspectFit
        
        // 添加图像视图到注释视图
        addSubview(imageView)
        
        // 设置图像视图的大小和位置
        let size = marker?.markerType.size ?? .init()
        imageView.frame = CGRect(origin: .init(), size: size)
        
        // 设置注释视图的大小
        self.frame = imageView.frame
        
        // 设置注释视图的中心点偏移
        self.centerOffset = CGPoint(x: 0, y: -imageView.frame.height / 2)
    }
    
    override func prepareForDisplay() {
        super.prepareForDisplay()
        
        // 确保图像是最新的
        updateImage()
    }
    
    private func updateImage() {
        let oldImage = imageView.image
        imageView.image = uiImage
        
        // 如果图像发生变化或为空，重新设置图像视图
        if imageView.image == nil || oldImage != imageView.image {
            setupImageView()
        }
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)
        if selected {
            self.marker?.isSelected = true
        } else {
            self.marker?.isSelected = false
        }
        
        // 更新图像以反映选中状态
        updateImage()
    }
}