//
//  CheckPermissionGuideVC.swift
//  QuickLocation
//

import UIKit
import RxSwift
import RxCocoa

final class CheckPermissionGuideVC: BaseViewController {

    enum Kind {
        case location
        case screenTime
    }

    private let kind: Kind

    init(kind: Kind) {
        self.kind = kind
        super.init(nibName: nil, bundle: nil)
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
        bindActions()
        refreshActionButton()
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        refreshActionButton()
    }

    private func bindActions() {
        if kind == .location {
            tipsLab.rx.tapGesture.subscribe { _ in
                AppRouter.push(Route.web, userInfo: ["url": URLManager.shared.privacyPolicyUrl])
            }.disposed(by: disposeBag)
        }

        settingBtn.rx.tap.subscribe(onNext: { [weak self] in
            self?.handleAction()
        }).disposed(by: disposeBag)
    }

    private func handleAction() {
        switch kind {
        case .location:
            openSystemSettings()
        case .screenTime:
            requestScreenTimeAuthorization()
        }
    }

    private func openSystemSettings() {
        guard let settingsURL = URL(string: UIApplication.openSettingsURLString) else { return }
        if UIApplication.shared.canOpenURL(settingsURL) {
            UIApplication.shared.open(settingsURL, options: [:], completionHandler: nil)
        }
    }

    private func requestScreenTimeAuthorization() {
        guard #available(iOS 16.0, *) else {
            DLToast.show(text: "该功能需要 iOS 16 及以上系统")
            return
        }
        Task { @MainActor [weak self] in
            do {
                if !AppRestrictManager.shared.isAuthorized {
                    try await AppRestrictManager.shared.requestAuthorization()
                }
                guard AppRestrictManager.shared.isAuthorized else {
                    DLToast.show(text: "需要屏幕使用时间权限")
                    self?.refreshActionButton()
                    return
                }
                self?.refreshActionButton()
            } catch {
                DLToast.show(text: "授权失败，请在设置中开启屏幕使用时间权限")
                self?.refreshActionButton()
            }
        }
    }

    private func refreshActionButton() {
        switch kind {
        case .location:
            let authorized = CheckPermissionAuth.isLocationAuthorized
            settingBtn.setTitle(authorized ? "已设置" : "去设置", for: .normal)
            applyActionStyle(isEnabled: !authorized)
        case .screenTime:
            let authorized = CheckPermissionAuth.isScreenTimeAuthorized
            settingBtn.setTitle(authorized ? "开启成功" : "去设置", for: .normal)
            applyActionStyle(isEnabled: !authorized)
        }
    }

    private func applyActionStyle(isEnabled: Bool) {
        settingBtn.isEnabled = isEnabled
        if isEnabled {
            settingBtn.setTitleColor(.white, for: .normal)
            settingBtn.setTitleColor(.white, for: .disabled)
            settingBtn.setBackgroundImage(UIImage(named: "Common/button_bg_2"), for: .normal)
            settingBtn.setBackgroundImage(UIImage(named: "Common/button_bg_2"), for: .disabled)
            settingBtn.backgroundColor = .clear
        } else {
            settingBtn.setTitleColor(UIColor(hexStr: "#B5B5B5"), for: .normal)
            settingBtn.setTitleColor(UIColor(hexStr: "#B5B5B5"), for: .disabled)
            settingBtn.setBackgroundImage(nil, for: .normal)
            settingBtn.setBackgroundImage(nil, for: .disabled)
            settingBtn.backgroundColor = UIColor(hexStr: "#EDEDED")
        }
    }

    private func setupUI() {
        view.backgroundColor = UIColor(hexStr: "#FAFAFA")
        view.addSubview(navBgView)
        view.addSubview(navView)
        view.addSubview(scrollView)
        scrollView.addSubview(scrollContentView)
        scrollContentView.addSubview(stepImgView)
        view.addSubview(settingBtn)
        if kind == .location {
            view.addSubview(tipsLab)
        }

        navBgView.layoutChain
            .edges(excludingEdge: .bottom)
            .height(kNaviHeight)

        navView.layoutChain
            .edges(excludingEdge: .bottom)
            .height(kNaviHeight)

        settingBtn.layoutChain
            .edgesHorzontal(30)
            .bottom(kSafeBottomMargin + 13)
            .height(56)

        if kind == .location {
            tipsLab.layoutChain
                .edgesHorzontal(31)
                .bottomToTopOfView(settingBtn, offset: -20)

            scrollView.layoutChain
                .topToBottomOfView(navView, offset: 15)
                .edgesHorzontal()
                .bottomToTopOfView(tipsLab, offset: -10)
        } else {
            scrollView.layoutChain
                .topToBottomOfView(navView, offset: 15)
                .edgesHorzontal()
                .bottomToTopOfView(settingBtn, offset: -20)
        }

        scrollContentView.layoutChain
            .edges()
            .widthToView(scrollView)

        let imageRatio: CGFloat = kind == .location ? (1066.0 / 672.0) : (1014.0 / 672.0)
        stepImgView.layoutChain
            .top()
            .edgesHorzontal(20)
            .bottom()
            .heightToWidth(imageRatio)
    }

    lazy var navBgView: UIImageView = {
        let iv = UIImageView()
        iv.image = UIImage(named: "Common/navBar_bg_2")
        iv.contentMode = .scaleAspectFill
        return iv
    }()

    lazy var navView = BaseNavigationView(title: kind == .location ? "权限检测" : "屏幕使用时间")

    lazy var scrollView: UIScrollView = {
        let view = UIScrollView()
        view.backgroundColor = .clear
        view.showsVerticalScrollIndicator = false
        return view
    }()

    lazy var scrollContentView: UIView = {
        let view = UIView()
        view.backgroundColor = .clear
        return view
    }()

    lazy var stepImgView: UIImageView = {
        let name = kind == .location ? "CheckPermission/location" : "CheckPermission/screen"
        let view = UIImageView(image: UIImage(named: name))
        view.contentMode = .scaleAspectFill
        view.clipsToBounds = true
        return view
    }()

    lazy var tipsLab: UILabel = {
        let label = UILabel()
        label.font = .systemFont(ofSize: 10, weight: .regular)
        label.textColor = UIColor(hexStr: "#333333")
        label.textAlignment = .center
        label.numberOfLines = 0
        label.isUserInteractionEnabled = true

        let text = "根据我们的隐私政策和用户设置，您的位置数据也将与第三方共享，用于研究、定制广告和分析目的。"
        let attr = NSMutableAttributedString(string: text)
        let range = (text as NSString).range(of: "隐私政策")
        attr.addAttribute(.foregroundColor, value: UIColor(hexStr: "#16B3FF"), range: range)
        label.attributedText = attr
        return label
    }()

    lazy var settingBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.setTitle("去设置", for: .normal)
        btn.titleLabel?.font = FontManager.boboBold(18)
        btn.setTitleColor(.white, for: .normal)
        btn.setBackgroundImage(UIImage(named: "Common/button_bg_2"), for: .normal)
        btn.cornerRadius = 20
        btn.clipsToBounds = true
        return btn
    }()
}