//
//  SharePopView.swift
//  QuickLocation
//
//  Created by 八条 on 2026/7/3.
//

import UIKit

class SharePopView: UIView {

    private static let shared = SharePopView(frame: CGRect(origin: .zero, size: kScreenSize))
    private var shareURL: String = ""

    private let contentHeight: CGFloat = 191 + kSafeBottomMargin

    static func show(shareURL: String) {
        guard let superView = kKeyWindow else { return }

        if SharePopView.shared.superview != nil {
            SharePopView.shared.dismiss(animated: false)
        }

        SharePopView.shared.shareURL = shareURL
        SharePopView.shared.bgView.alpha = 0
        superView.addSubview(SharePopView.shared)
        superView.bringSubviewToFront(SharePopView.shared)

        SharePopView.shared.contentView.transform = CGAffineTransform(translationX: 0, y: SharePopView.shared.contentHeight)
        UIView.animate(withDuration: 0.3, delay: 0, options: .curveEaseOut) {
            SharePopView.shared.bgView.alpha = 1
            SharePopView.shared.contentView.transform = .identity
        }
    }

    private func dismiss(animated: Bool = true) {
        if animated {
            UIView.animate(withDuration: 0.25, delay: 0, options: .curveEaseIn) {
                self.bgView.alpha = 0
                self.contentView.transform = CGAffineTransform(translationX: 0, y: self.contentHeight)
            } completion: { _ in
                self.removeFromSuperview()
            }
        } else {
            removeFromSuperview()
        }
    }

    @objc private func handleBgTap() {
        dismiss()
    }

    @objc private func handleWeChatTap() {
        shareToWeChat(scene: 0)
    }

    @objc private func handleMomentsTap() {
        shareToWeChat(scene: 1)
    }

    @objc private func handleLinkTap() {
        UIPasteboard.general.string = shareURL
        DLToast.showSuccess(text: "链接已复制")
        dismiss()
    }

    private func shareToWeChat(scene: Int32) {
        let message = WXMediaMessage()
        message.title = kAppName
        let webpage = WXWebpageObject()
        webpage.webpageUrl = shareURL
        message.mediaObject = webpage

        let req = SendMessageToWXReq()
        req.bText = false
        req.message = message
        req.scene = scene
        WXApi.send(req)

        dismiss()
    }

    // MARK: - UI

    override init(frame: CGRect) {
        super.init(frame: frame)
        backgroundColor = .clear

        addSubview(bgView)
        bgView.addSubview(contentView)
        contentView.addSubview(titleLabel)
        contentView.addSubview(shareStack)
        contentView.addSubview(closeBtn)

        bgView.layoutChain.edges()
        contentView.layoutChain
            .edges(excludingEdge: .top)
            .height(contentHeight)

        titleLabel.layoutChain
            .top(20)
            .centerX()

        closeBtn.layoutChain
            .centerY(titleLabel)
            .right(20)
            .width(20)
            .height(20)

        shareStack.layoutChain
            .topToBottomOfView(titleLabel, offset: 30)
            .centerX()

        let tap = UITapGestureRecognizer(target: self, action: #selector(handleBgTap))
        bgView.addGestureRecognizer(tap)
    }

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

    // MARK: - Lazy Views

    private lazy var bgView: UIView = {
        let view = UIView()
        view.backgroundColor = .black.withAlphaComponent(0.5)
        return view
    }()

    private lazy var contentView: UIView = {
        let view = UIView()
        view.backgroundColor = .white
        view.layer.cornerRadius = 26
        view.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
        view.clipsToBounds = true
        return view
    }()

    private lazy var titleLabel: UILabel = {
        let label = UILabel()
        label.text = "分享"
        label.font = .systemFont(ofSize: 16, weight: .medium)
        label.textColor = UIColor(hexStr: "#333333")
        return label
    }()

    private lazy var shareStack: UIStackView = {
        let stack = UIStackView(arrangedSubviews: [
            makeShareItem(icon: "Share/friend", title: "微信", action: #selector(handleWeChatTap)),
            makeShareItem(icon: "Share/moments", title: "朋友圈", action: #selector(handleMomentsTap)),
            makeShareItem(icon: "Share/url", title: "链接", action: #selector(handleLinkTap))
        ])
        stack.axis = .horizontal
        stack.spacing = 50
        stack.alignment = .center
        return stack
    }()

    private lazy var closeBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.setImage(UIImage(named: "Group/close"), for: .normal)
        btn.addTarget(self, action: #selector(handleBgTap), for: .touchUpInside)
        btn.extendEdgeInsets = UIEdgeInsets(top: 15, left: 20, bottom: 20, right: 20)
        return btn
    }()

    private func makeShareItem(icon: String, title: String, action: Selector) -> UIView {
        let container = UIView()

        let imgView = UIImageView(image: UIImage(named: icon))
        imgView.contentMode = .scaleAspectFit
        container.addSubview(imgView)
        imgView.layoutChain
            .top(0)
            .centerX()
            .width(50)
            .height(50)

        let label = UILabel()
        label.text = title
        label.font = .systemFont(ofSize: 12)
        label.textColor = UIColor(hexStr: "#666666")
        label.textAlignment = .center
        container.addSubview(label)
        label.layoutChain
            .topToBottomOfView(imgView, offset: 8)
            .centerX()
            .bottom(0)

        container.layoutChain.width(60).height(78)

        let btn = UIButton(type: .custom)
        container.addSubview(btn)
        btn.layoutChain.edges()
        btn.addTarget(self, action: action, for: .touchUpInside)

        return container
    }
}