//
//  UIFont+Extension.swift
//  DLSDK
//
//  Created by osell on 2023/4/11.
//

import UIKit

// MARK: - 注册自定义字体数据
public extension UIFont {
    
    /// 自定义字体样式
    /// - Parameters:
    ///   - style: 字体样式
    ///   - size: 字体大小
    convenience init?<Style: FontPlugin>(custom style: Style, size: CGFloat) {
        var name = style.name
        if UIFont.fontNames(forFamilyName: style.name).isEmpty,
           let fontName = UIFont.loadFontName(style.fileName) {
            name = fontName
        }
        self.init(name: name, size: size)
    }
    
    /// 自定义字体样式
    /// - Parameters:
    ///   - style: 字体样式
    ///   - size: 字体大小
    /// - Returns: UIFont
    static func customFont<Style: FontPlugin>(style: Style, size: CGFloat) -> UIFont? {
        UIFont(custom: style, size: size)
    }
    
    /// 加载本地自定义字体
    /// - Parameter name: 字体文件名称（可含扩展名，如 `xxx.ttf`）
    /// - Returns: 注册后的字体 Full Name（可用于 `UIFont(name:)`）
    public static func loadFontName(_ fileName: String) -> String? {
        let nsName = fileName as NSString
        let resource = nsName.deletingPathExtension
        let ext = nsName.pathExtension
        let fontURL: URL?
        if ext.isEmpty {
            fontURL = Bundle.main.url(forResource: fileName, withExtension: nil)
        } else {
            fontURL = Bundle.main.url(forResource: resource, withExtension: ext)
                ?? Bundle.main.url(forResource: fileName, withExtension: nil)
        }
        guard let fontURL,
              let data = try? Data(contentsOf: fontURL),
              let provider = CGDataProvider(data: data as CFData),
              let font = CGFont(provider) else { return nil }

        var error: Unmanaged<CFError>?
        CTFontManagerRegisterGraphicsFont(font, &error)

        // Full Name 比损坏的 PostScript Name 更可靠
        if let full = font.fullName as String?, !full.isEmpty {
            return full
        }
        if let ps = font.postScriptName as String?, !ps.isEmpty, !ps.hasPrefix("-") {
            return ps
        }
        return nil
    }
}
// MARK: - Montserrat
//public extension UIFont {
//    
//    static func montserratLight(size: CGFloat) -> UIFont {
//        Montserrat.light.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .light)
//    }
//    
//    static func montserratRegular(size: CGFloat) -> UIFont {
//        Montserrat.regular.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .regular)
//    }
//    
//    static func montserratMedium(size: CGFloat) -> UIFont {
//        Montserrat.medium.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .medium)
//    }
//    
//    static func montserratSemiBold(size: CGFloat) -> UIFont {
//        Montserrat.semiBold.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .semibold)
//    }
//    
//    static func montserratBold(size: CGFloat) -> UIFont {
//        Montserrat.bold.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .bold)
//    }
//}

// MARK: - DINPro
//public extension UIFont {
//    
//    static func dinProLight(size: CGFloat) -> UIFont {
//        DINPro.light.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .light)
//    }
//    
//    static func dinProRegular(size: CGFloat) -> UIFont {
//        DINPro.regular.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .regular)
//    }
//    
//    static func dinProMedium(size: CGFloat) -> UIFont {
//        DINPro.medium.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .medium)
//    }
//    
//    static func dinProBlack(size: CGFloat) -> UIFont {
//        DINPro.black.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .black)
//    }
//    
//    static func dinProBold(size: CGFloat) -> UIFont {
//        DINPro.bold.font(ofSize: size) ?? UIFont.systemFont(ofSize: size, weight: .bold)
//    }
//}

// MARK: - FontPlugin
public protocol FontPlugin {
    /// 字体名称
    var name: String { get }
    /// 字体文件名
    var fileName: String { get }
    /// 返回该类型大小字体
    func font(ofSize: CGFloat) -> UIFont?
}