mastodon-ios/Mastodon/Scene/Compose/CollectionViewCell/ComposeStatusPollExpiresOptionCollectionViewCell.swift

//
//  ComposeStatusPollExpiresOptionCollectionViewCell.swift
//  Mastodon
//
//  Created by MainasuK Cirno on 2021-3-24.
//

import os.log
import UIKit
import Combine

protocol ComposeStatusPollExpiresOptionCollectionViewCellDelegate: AnyObject {
    func composeStatusPollExpiresOptionCollectionViewCell(_ cell: ComposeStatusPollExpiresOptionCollectionViewCell, didSelectExpiresOption expiresOption: ComposeStatusPollItem.PollExpiresOptionAttribute.ExpiresOption)
}

final class ComposeStatusPollExpiresOptionCollectionViewCell: UICollectionViewCell {
    
    var disposeBag = Set<AnyCancellable>()
    weak var delegate: ComposeStatusPollExpiresOptionCollectionViewCellDelegate?
    
    let durationButton: UIButton = {
        let button = HighlightDimmableButton()
        button.titleLabel?.font = UIFontMetrics(forTextStyle: .body).scaledFont(for: .systemFont(ofSize: 12))
        button.expandEdgeInsets = UIEdgeInsets(top: 0, left: -10, bottom: -20, right: -20)
        button.setTitle(L10n.Scene.Compose.Poll.durationTime(L10n.Scene.Compose.Poll.thirtyMinutes), for: .normal)
        button.setTitleColor(Asset.Colors.brandBlue.color, for: .normal)
        return button
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        _init()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        _init()
    }
    
}

extension ComposeStatusPollExpiresOptionCollectionViewCell {
    
    private typealias ExpiresOption = ComposeStatusPollItem.PollExpiresOptionAttribute.ExpiresOption
    
    private func _init() {
        durationButton.translatesAutoresizingMaskIntoConstraints = false
        contentView.addSubview(durationButton)
        NSLayoutConstraint.activate([
            durationButton.topAnchor.constraint(equalTo: contentView.topAnchor),
            durationButton.leadingAnchor.constraint(equalTo: contentView.readableContentGuide.leadingAnchor, constant: PollOptionView.checkmarkBackgroundLeadingMargin),
            durationButton.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
        ])
        
        let children = ExpiresOption.allCases.map { expiresOption -> UIAction in
            UIAction(title: expiresOption.title, image: nil, identifier: nil, discoverabilityTitle: nil, attributes: [], state: .off) { [weak self] action in
                guard let self = self else { return }
                self.expiresOptionActionHandler(action, expiresOption: expiresOption)
            }
        }
        durationButton.menu = UIMenu(title: "", image: nil, identifier: nil, options: .displayInline, children: children)
        durationButton.showsMenuAsPrimaryAction = true
    }
    
}

extension ComposeStatusPollExpiresOptionCollectionViewCell {

    private func expiresOptionActionHandler(_ sender: UIAction, expiresOption: ExpiresOption) {
        os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: select %s", ((#file as NSString).lastPathComponent), #line, #function, expiresOption.title)
        delegate?.composeStatusPollExpiresOptionCollectionViewCell(self, didSelectExpiresOption: expiresOption)
    }
    
}