/*
 * Copyright (C) 2015 - 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *	*	Redistributions of source code must retain the above copyright notice, this
 *		list of conditions and the following disclaimer.
 *
 *	*	Redistributions in binary form must reproduce the above copyright notice,
 *		this list of conditions and the following disclaimer in the documentation
 *		and/or other materials provided with the distribution.
 *
 *	*	Neither the name of CosmicMind nor the names of its
 *		contributors may be used to endorse or promote products derived from
 *		this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import UIKit

extension UIViewController {
	/**
     A convenience property that provides access to the StatusBarController.
     This is the recommended method of accessing the StatusBarController
     through child UIViewControllers.
     */
	public var statusBarController: StatusBarController? {
		return traverseViewControllerHierarchyForClassType()
	}
}

open class StatusBarController: TransitionController {
    /**
     A Display value to indicate whether or not to
     display the rootViewController to the full view
     bounds, or up to the toolbar height.
     */
    open var displayStyle = DisplayStyle.full {
        didSet {
            layoutSubviews()
        }
    }
    
    /// Device status bar style.
    open var statusBarStyle: UIStatusBarStyle {
        get {
            return Application.statusBarStyle
        }
        set(value) {
            Application.statusBarStyle = value
        }
    }
    
    /// Device visibility state.
    open var isStatusBarHidden: Bool {
        get {
            return Application.isStatusBarHidden
        }
        set(value) {
            Application.isStatusBarHidden = value
            statusBar.isHidden = isStatusBarHidden
        }
    }
    
    /// An adjustment based on the rules for displaying the statusBar.
    open var statusBarOffsetAdjustment: CGFloat {
        return Application.shouldStatusBarBeHidden || statusBar.isHidden ? 0 : statusBar.bounds.height
    }
    
    /// A boolean that indicates to hide the statusBar on rotation.
    open var shouldHideStatusBarOnRotation = false
    
    /// A reference to the statusBar.
    open let statusBar = UIView()
	
	open override func layoutSubviews() {
		super.layoutSubviews()
        
        if shouldHideStatusBarOnRotation {
            statusBar.isHidden = Application.shouldStatusBarBeHidden
        }
        
        statusBar.frame.size.width = view.bounds.width
        
        switch displayStyle {
        case .partial:
            let h = statusBar.bounds.height
            container.frame.origin.y = h
            container.frame.size.height = view.bounds.height - h
            
        case .full:
            container.frame = view.bounds
        }
        
        rootViewController.view.frame = container.bounds
        
        container.layer.zPosition = statusBar.layer.zPosition + (Application.shouldStatusBarBeHidden ? 1 : -1)
    }
	
	open override func prepare() {
        super.prepare()
		prepareStatusBar()
	}
}

fileprivate extension StatusBarController {
    /// Prepares the statusBar.
    func prepareStatusBar() {
        if nil == statusBar.backgroundColor {
            statusBar.backgroundColor = .white
        }
        
        statusBar.frame.size.height = 20
        view.addSubview(statusBar)
    }
}
