//
//  MasterTableViewCell.swift
//  NetNewsWire
//
//  Created by Brent Simmons on 8/1/15.
//  Copyright © 2015 Ranchero Software, LLC. All rights reserved.
//

import UIKit
import RSCore
import Account
import RSTree

class MasterTableViewCell : UITableViewCell {

	override var accessibilityLabel: String? {
		set {}
		get {
			if unreadCount > 0 {
				let unreadLabel = NSLocalizedString("unread", comment: "Unread label for accessiblity")
				return "\(name) \(unreadCount) \(unreadLabel)"
			} else {
				return name
			}
		}
	}

	var faviconImage: UIImage? {
		didSet {
			if let image = faviconImage {
				faviconImageView.image = shouldShowImage ? image : nil
			}
			else {
				faviconImageView.image = nil
			}
		}
	}

	var shouldShowImage = false {
		didSet {
			if shouldShowImage != oldValue {
				setNeedsLayout()
			}
			faviconImageView.image = shouldShowImage ? faviconImage : nil
		}
	}

	var unreadCount: Int {
		get {
			return unreadCountView.unreadCount
		}
		set {
			if unreadCountView.unreadCount != newValue {
				unreadCountView.unreadCount = newValue
				unreadCountView.isHidden = (newValue < 1)
				setNeedsLayout()
			}
		}
	}

	var name: String {
		get {
			return titleView.text ?? ""
		}
		set {
			if titleView.text != newValue {
				titleView.text = newValue
				setNeedsDisplay()
				setNeedsLayout()
			}
		}
	}

	private let titleView: UILabel = {
		let label = UILabel()
		label.numberOfLines = 1
		label.lineBreakMode = .byTruncatingTail
		label.allowsDefaultTighteningForTruncation = false
		return label
	}()

	private let faviconImageView: UIImageView = {
		return UIImageView(image: AppAssets.feedImage)
	}()

	private let unreadCountView = MasterUnreadCountView(frame: CGRect.zero)

	required init?(coder: NSCoder) {		
		super.init(coder: coder)
		commonInit()
	}

	override func layoutSubviews() {
		super.layoutSubviews()
		let layout = MasterTableViewCellLayout(cellSize: bounds.size, shouldShowImage: shouldShowImage, label: titleView, unreadCountView: unreadCountView)
		layoutWith(layout)
	}

}

private extension MasterTableViewCell {

	func commonInit() {
		addSubviewAtInit(unreadCountView)
		addSubviewAtInit(faviconImageView)
		addSubviewAtInit(titleView)
	}

	func addSubviewAtInit(_ view: UIView) {
		addSubview(view)
		view.translatesAutoresizingMaskIntoConstraints = false
	}

	func layoutWith(_ layout: MasterTableViewCellLayout) {
		faviconImageView.rs_setFrameIfNotEqual(layout.faviconRect)
		titleView.rs_setFrameIfNotEqual(layout.titleRect)
		unreadCountView.rs_setFrameIfNotEqual(layout.unreadCountRect)
	}
	
}

extension UIView {
	func rs_setFrameIfNotEqual(_ rect: CGRect) {
		if !self.frame.equalTo(rect) {
			self.frame = rect
		}
	}
}