//
//  UIDevice+Extension.swift
//  QuickLocation
//

import UIKit

extension UIDevice {

    /// 硬件机型标识，如 `iPhone17,1`
    static var machineIdentifier: String {
        var systemInfo = utsname()
        uname(&systemInfo)
        return withUnsafePointer(to: &systemInfo.machine.0) { ptr in
            String(cString: ptr)
        }
    }

    /// 可读机型名，如 `iPhone 16 Pro`；未知机型回退为 `iPhone`
    static var modelName: String {
        deviceModelMap[machineIdentifier] ?? "iPhone"
    }

    /// 与系统状态栏一致的电量百分比（四舍五入）；不可用时返回 `nil`
    static var batteryPercent: Int? {
        let device = UIDevice.current
        if !device.isBatteryMonitoringEnabled {
            device.isBatteryMonitoringEnabled = true
        }
        let level = device.batteryLevel
        guard level >= 0 else { return nil }
        return Int((level * 100).rounded())
    }

    /// 是否正在充电 / 已充满接电
    static var isBatteryCharging: Bool {
        let device = UIDevice.current
        if !device.isBatteryMonitoringEnabled {
            device.isBatteryMonitoringEnabled = true
        }
        switch device.batteryState {
        case .charging, .full:
            return true
        default:
            return false
        }
    }

    private static let deviceModelMap: [String: String] = [
        "iPhone10,1": "iPhone 8",
        "iPhone10,4": "iPhone 8",
        "iPhone10,2": "iPhone 8 Plus",
        "iPhone10,5": "iPhone 8 Plus",
        // iPhone X系列
        "iPhone10,3": "iPhone X",
        "iPhone10,6": "iPhone X",
        "iPhone11,2": "iPhone XS",
        "iPhone11,4": "iPhone XS Max",
        "iPhone11,6": "iPhone XS Max",
        "iPhone11,8": "iPhone XR",
        // iPhone11
        "iPhone12,1": "iPhone 11",
        "iPhone12,3": "iPhone 11 Pro",
        "iPhone12,5": "iPhone 11 Pro Max",
        // iPhone12
        "iPhone13,1": "iPhone 12 mini",
        "iPhone13,2": "iPhone 12",
        "iPhone13,3": "iPhone 12 Pro",
        "iPhone13,4": "iPhone 12 Pro Max",
        // iPhone13
        "iPhone14,4": "iPhone 13 mini",
        "iPhone14,5": "iPhone 13",
        "iPhone14,2": "iPhone 13 Pro",
        "iPhone14,3": "iPhone 13 Pro Max",
        // iPhone14
        "iPhone14,7": "iPhone 14",
        "iPhone14,8": "iPhone 14 Plus",
        "iPhone15,2": "iPhone 14 Pro",
        "iPhone15,3": "iPhone 14 Pro Max",
        // iPhone15
        "iPhone15,4": "iPhone 15",
        "iPhone15,5": "iPhone 15 Plus",
        "iPhone16,1": "iPhone 15 Pro",
        "iPhone16,2": "iPhone 15 Pro Max",
        // iPhone16
        "iPhone17,1": "iPhone 16 Pro",
        "iPhone17,2": "iPhone 16 Pro Max",
        "iPhone17,3": "iPhone 16",
        "iPhone17,4": "iPhone 16 Plus",
        "iPhone17,5": "iPhone 16e",
        // iPhone17 2025机型
        "iPhone18,1": "iPhone 17 Pro",
        "iPhone18,2": "iPhone 17 Pro Max",
        "iPhone18,3": "iPhone 17",
        "iPhone18,4": "iPhone Air",
        // Simulator
        "i386": "Simulator",
        "x86_64": "Simulator",
        "arm64": "Simulator"
    ]
}