//
//  SessionExpiredDialogViewController.swift
//  suixinkan
//

import SnapKit
import UIKit

/// 登录凭证失效时展示的强制确认弹窗，用户确认后由调用方执行退出登录。
@MainActor
final class SessionExpiredDialogViewController: UIViewController {

    private let onConfirm: () -> Void
    private let confirmButton = AppButton(title: "确认并退出登录")
    private var didConfirm = false

    /// 创建不可通过点击遮罩关闭的登录失效弹窗。
    init(onConfirm: @escaping () -> Void) {
        self.onConfirm = onConfirm
        super.init(nibName: nil, bundle: nil)
        modalPresentationStyle = .overFullScreen
        modalTransitionStyle = .crossDissolve
        isModalInPresentation = true
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

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

    private func setupUI() {
        view.backgroundColor = UIColor.black.withAlphaComponent(0.32)
        view.accessibilityViewIsModal = true
        view.accessibilityIdentifier = "sessionExpired.dialog"

        let cardView = UIView()
        cardView.backgroundColor = AppColor.cardBackground
        cardView.layer.cornerRadius = AppRadius.lg
        cardView.clipsToBounds = true

        let warningImageView = UIImageView(
            image: UIImage(systemName: "exclamationmark.circle.fill")
        )
        warningImageView.tintColor = UIColor(hex: 0xF05A5A)
        warningImageView.contentMode = .scaleAspectFit
        warningImageView.isAccessibilityElement = true
        warningImageView.accessibilityLabel = "登录状态异常"

        let titleLabel = UILabel()
        titleLabel.text = "登录提醒"
        titleLabel.textColor = AppColor.textPrimary
        titleLabel.font = .systemFont(ofSize: 20, weight: .semibold)
        titleLabel.textAlignment = .center

        let messageLabel = UILabel()
        messageLabel.text = "当前用户已在其他设备登录，\n请重新登录"
        messageLabel.textColor = UIColor(hex: 0x4B5563)
        messageLabel.font = .systemFont(ofSize: 14)
        messageLabel.textAlignment = .center
        messageLabel.numberOfLines = 0

        confirmButton.accessibilityIdentifier = "sessionExpired.confirmButton"
        confirmButton.addTarget(self, action: #selector(confirmTapped), for: .touchUpInside)

        let contentStack = UIStackView(arrangedSubviews: [
            warningImageView,
            titleLabel,
            messageLabel,
            confirmButton,
        ])
        contentStack.axis = .vertical
        contentStack.alignment = .fill
        contentStack.spacing = 16
        contentStack.setCustomSpacing(4, after: titleLabel)
        contentStack.setCustomSpacing(20, after: messageLabel)

        view.addSubview(cardView)
        cardView.addSubview(contentStack)

        cardView.snp.makeConstraints { make in
            make.center.equalToSuperview()
            make.leading.trailing.equalToSuperview().inset(32)
        }
        contentStack.snp.makeConstraints { make in
            make.edges.equalToSuperview().inset(24)
        }
        warningImageView.snp.makeConstraints { make in
            make.height.equalTo(64)
        }
    }

    @objc private func confirmTapped() {
        guard !didConfirm else { return }
        didConfirm = true
        confirmButton.isEnabled = false
        onConfirm()
    }
}