//
//  LaunchPrivacyConsentView.swift
//  QuickLocation
//

import UIKit

final class LaunchPrivacyConsentView: UIView, UITextViewDelegate {

    var onAgree: (() -> Void)?
    var onDisagree: (() -> Void)?
    var onOpenURL: ((String) -> Void)?

    override init(frame: CGRect) {
        super.init(frame: frame)
        setupUI()
        configureBody()
    }

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

    func show(in host: UIView) {
        frame = host.bounds
        autoresizingMask = [.flexibleWidth, .flexibleHeight]
        host.addSubview(self)
        layoutIfNeeded()
        dimView.alpha = 0
        card.transform = CGAffineTransform(translationX: 0, y: bounds.height * 0.4)
        UIView.animate(withDuration: 0.32, delay: 0, options: [.curveEaseOut]) {
            self.dimView.alpha = 1
            self.card.transform = .identity
        }
    }

    private func setupUI() {
        addSubview(dimView)
        addSubview(card)
        card.addSubview(gradientView)
        card.addSubview(titleLab)
        card.addSubview(bodyTextView)
        card.addSubview(agreeBtn)
        card.addSubview(disagreeBtn)

        dimView.layoutChain.edges()

        card.layoutChain
            .edgesHorzontal()
            .bottom()

        gradientView.layoutChain
            .top()
            .edgesHorzontal()
            .height(120)

        titleLab.layoutChain
            .top(28)
            .edgesHorzontal(24)
            .height(28)

        bodyTextView.layoutChain
            .topToBottomOfView(titleLab, offset: 16)
            .edgesHorzontal(24)

        agreeBtn.layoutChain
            .topToBottomOfView(bodyTextView, offset: 22)
            .edgesHorzontal(30)
            .height(56)

        disagreeBtn.layoutChain
            .topToBottomOfView(agreeBtn, offset: 12)
            .centerX()
            .bottom(kSafeBottomMargin + 8)
            .height(24)

        agreeBtn.addTarget(self, action: #selector(handleAgree), for: .touchUpInside)
        disagreeBtn.addTarget(self, action: #selector(handleDisagree), for: .touchUpInside)
    }

    private func configureBody() {
        let full = """
请你知悉，为保障为您正常提供相应服务，当您在未登录/未注册状态下进行浏览和搜索时，需要开启以下权限：
1.个人信息类型：设备信息（包括设备型号、设备标识符）。
2.位置权限（始终允许），您同意开启设备定位服务后，我们会通过GPS或WiFi等方式持续收集您的地理位置信息，将用于为您记录位置信息和为您的好友发送位置信息。您可以通过关闭手机定位服务，停止我们对您的地理位置信息进行收集，同时我们将对您的好友停止更新您的位置。
想了解更多服务协议、隐私内容和使用第三方SDK详情，请阅读我们的《用户服务协议》和《隐私政策》。
"""
        let paragraph = NSMutableParagraphStyle()
        paragraph.lineSpacing = 5
        paragraph.paragraphSpacing = 8

        let attributed = NSMutableAttributedString(
            string: full,
            attributes: [
                .font: UIFont.systemFont(ofSize: 14, weight: .regular),
                .foregroundColor: UIColor(hexStr: "#333333"),
                .paragraphStyle: paragraph
            ]
        )
        let agreementRange = (full as NSString).range(of: "《用户服务协议》")
        let privacyRange = (full as NSString).range(of: "《隐私政策》")
        if agreementRange.location != NSNotFound {
            attributed.addAttributes([
                .foregroundColor: UIColor(hexStr: "#16B3FF"),
                .link: "UserAgreement"
            ], range: agreementRange)
        }
        if privacyRange.location != NSNotFound {
            attributed.addAttributes([
                .foregroundColor: UIColor(hexStr: "#16B3FF"),
                .link: "PrivacyPolicy"
            ], range: privacyRange)
        }
        bodyTextView.attributedText = attributed
        bodyTextView.linkTextAttributes = [
            .foregroundColor: UIColor(hexStr: "#16B3FF"),
            .underlineStyle: NSUnderlineStyle.single.rawValue
        ]
        bodyTextView.delegate = self
    }

    func textView(
        _ textView: UITextView,
        shouldInteractWith URL: URL,
        in characterRange: NSRange,
        interaction: UITextItemInteraction
    ) -> Bool {
        switch URL.absoluteString {
        case "UserAgreement":
            onOpenURL?(URLManager.shared.userAgreementUrl)
        case "PrivacyPolicy":
            onOpenURL?(URLManager.shared.privacyPolicyUrl)
        default:
            break
        }
        return false
    }

    func textViewShouldBeginEditing(_ textView: UITextView) -> Bool { false }

    @objc private func handleAgree() {
        onAgree?()
    }

    @objc private func handleDisagree() {
        onDisagree?()
    }

    private lazy var dimView: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor.black.withAlphaComponent(0.45)
        return view
    }()

    private lazy var card: UIView = {
        let view = UIView()
        view.backgroundColor = .white
        view.layer.cornerRadius = 28
        view.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
        view.clipsToBounds = true
        return view
    }()

    private lazy var gradientView: LaunchPrivacyGradientView = {
        let view = LaunchPrivacyGradientView()
        view.isUserInteractionEnabled = false
        return view
    }()

    private lazy var titleLab: UILabel = {
        let label = UILabel()
        label.text = "服务协议及隐私政策"
        label.font = .systemFont(ofSize: 20, weight: .semibold)
        label.textColor = UIColor(hexStr: "#1A1A1A")
        label.textAlignment = .center
        return label
    }()

    private lazy var bodyTextView: UITextView = {
        let textView = UITextView()
        textView.backgroundColor = .clear
        textView.isEditable = false
        textView.isScrollEnabled = false
        textView.isSelectable = true
        textView.textContainerInset = .zero
        textView.textContainer.lineFragmentPadding = 0
        return textView
    }()

    private lazy var agreeBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.cornerRadius = 20
        btn.setTitle("同意并进入", for: .normal)
        btn.setTitleColor(.white, for: .normal)
        btn.titleLabel?.font = FontManager.boboBold(18)
        btn.setBackgroundImage(UIImage(named: "Common/button_bg_2"), for: .normal)
        return btn
    }()

    private lazy var disagreeBtn: UIButton = {
        let btn = UIButton(type: .system)
        btn.setTitle("不同意", for: .normal)
        btn.setTitleColor(UIColor(hexStr: "#16B3FF"), for: .normal)
        btn.titleLabel?.font = .systemFont(ofSize: 15, weight: .regular)
        return btn
    }()
}

private final class LaunchPrivacyGradientView: UIView {
    override class var layerClass: AnyClass { CAGradientLayer.self }

    override func layoutSubviews() {
        super.layoutSubviews()
        guard let layer = layer as? CAGradientLayer else { return }
        layer.colors = [
            UIColor(hexStr: "#D9F8F0").cgColor,
            UIColor.white.cgColor
        ]
        layer.startPoint = CGPoint(x: 0.5, y: 0)
        layer.endPoint = CGPoint(x: 0.5, y: 1)
    }
}