//
//  CloudDriveActionSheetViewController.swift
//  suixinkan
//

import SnapKit
import UIKit

/// 云盘底部操作弹层，用于同步 Android 云盘上传与文件操作菜单。
final class CloudDriveActionSheetViewController: UIViewController {
    /// 云盘底部弹层操作项。
    struct Item {
        /// 操作文案。
        let title: String
        /// 操作图标。
        let image: UIImage?
        /// 是否展示为危险操作。
        let isDestructive: Bool
        /// 点击后的业务动作。
        let handler: () -> Void
    }

    private let sheetTitle: String?
    private let items: [Item]
    private let dimView = UIView()
    private let panelView = UIView()
    private let stackView = UIStackView()

    /// 初始化云盘底部弹层。
    init(title: String? = nil, items: [Item]) {
        self.sheetTitle = title
        self.items = items
        super.init(nibName: nil, bundle: nil)
        modalPresentationStyle = .overFullScreen
        modalTransitionStyle = .crossDissolve
    }

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

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

    private func setupUI() {
        view.backgroundColor = .clear
        dimView.backgroundColor = UIColor.black.withAlphaComponent(0.35)
        dimView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(cancelTapped)))

        panelView.backgroundColor = .white
        panelView.layer.cornerRadius = 18
        panelView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
        panelView.clipsToBounds = true

        stackView.axis = .vertical
        stackView.spacing = 0

        view.addSubview(dimView)
        view.addSubview(panelView)
        panelView.addSubview(stackView)

        if let sheetTitle {
            let titleLabel = UILabel()
            titleLabel.text = sheetTitle
            titleLabel.font = .app(.bodyMedium)
            titleLabel.textColor = AppColor.textPrimary
            titleLabel.textAlignment = .center
            titleLabel.snp.makeConstraints { make in
                make.height.equalTo(54)
            }
            stackView.addArrangedSubview(titleLabel)
        }

        for item in items {
            stackView.addArrangedSubview(makeItemButton(item))
        }

        let spacer = UIView()
        spacer.backgroundColor = AppColor.pageBackground
        spacer.snp.makeConstraints { make in
            make.height.equalTo(8)
        }
        stackView.addArrangedSubview(spacer)

        let cancelButton = UIButton(type: .system)
        cancelButton.setTitle("取消", for: .normal)
        cancelButton.setTitleColor(AppColor.textPrimary, for: .normal)
        cancelButton.titleLabel?.font = .app(.body)
        cancelButton.addTarget(self, action: #selector(cancelTapped), for: .touchUpInside)
        cancelButton.snp.makeConstraints { make in
            make.height.equalTo(54)
        }
        stackView.addArrangedSubview(cancelButton)
    }

    private func setupConstraints() {
        dimView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        panelView.snp.makeConstraints { make in
            make.leading.trailing.bottom.equalToSuperview()
        }
        stackView.snp.makeConstraints { make in
            make.top.leading.trailing.equalToSuperview()
            make.bottom.equalTo(view.safeAreaLayoutGuide)
        }
    }

    private func makeItemButton(_ item: Item) -> UIButton {
        let button = UIButton(type: .system)
        button.setTitle(item.title, for: .normal)
        button.setImage(item.image, for: .normal)
        button.tintColor = item.isDestructive ? AppColor.danger : AppColor.textPrimary
        button.setTitleColor(item.isDestructive ? AppColor.danger : AppColor.textPrimary, for: .normal)
        button.titleLabel?.font = .app(.body)
        button.contentHorizontalAlignment = .left
        button.contentEdgeInsets = UIEdgeInsets(top: 0, left: AppSpacing.xl, bottom: 0, right: AppSpacing.xl)
        button.imageEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: AppSpacing.md)
        button.addAction(UIAction { [weak self] _ in
            self?.dismiss(animated: true) {
                item.handler()
            }
        }, for: .touchUpInside)
        button.snp.makeConstraints { make in
            make.height.equalTo(54)
        }
        return button
    }

    @objc private func cancelTapped() {
        dismiss(animated: true)
    }
}