CSColour.swift

//
//  UIColor+Carsales.swift
//  CSAppKit
//
//  Created by Ben Thomas on 22/11/19.
//  Copyright © 2019 Carsales.com.au. All rights reserved.
//

import Foundation

@objc public class CSColourObjc: NSObject {
    @objc public class func uiColor(from csColour: CSColour) -> UIColor {
        return csColour.uiColor
    }
}

@objc public enum CSColour: Int {

    // MARK: Backgrounds

    case darkViewBackground // always dark
    case viewBackground
    case secondaryViewBackground

    // MARK: Cards, lists, forms

    case listItemBackground
    case listContainerBackground

    // MARK: Labels, Text Views, etc

    case text
    case secondaryText
    case tertiaryText

    // MARK: Borders and Separators/Keylines
    
    case border
    case separator

    // MARK: Buttons, icons, etc

    case standardCallToAction
    case prominentCallToAction
    
    // MARK: Other controls
    
    case activePageControl
    case inactivePageControl
    
    // MARK: Other
    
    case facebookBlue
    case googleRed

    // MARK: -
    
    public var uiColor: UIColor {
        switch self {
        case .border: return .border
        case .separator: return .separatorLine
        case .darkViewBackground: return .darkViewBackground
        case .viewBackground: return .viewBackground
        case .secondaryViewBackground: return .secondaryViewBackground
        case .standardCallToAction: return .standardCallToAction
        case .prominentCallToAction: return .prominentCallToAction
        case .listItemBackground: return .listItemBackground
        case .listContainerBackground: return .listContainerBackground
        case .text: return .text
        case .secondaryText: return .secondaryText
        case .tertiaryText: return .tertiaryText
        case .facebookBlue: return .facebookBlue
        case .googleRed: return .googleRed
        case .activePageControl: return .inactivePageControl
        case .inactivePageControl: return .inactivePageControl
        }
    }

}

// MARK: -

private extension UIColor {

    // MARK: - Fundamental
    
    static var primaryBackground: UIColor {
        if #available(iOS 13.0, *) {
            return .systemBackground
        } else {
            return .white
        }
    }

    static var secondaryBackground: UIColor {
        if #available(iOS 13.0, *) {
            return .secondarySystemBackground
        } else {
            return UIColor.RGB(242, 242, 242) // was cs_bgGrey
        }
    }

    // MARK: - Backgrounds

    static var viewBackground: UIColor {
        if #available(iOS 13.0, *) {
            return .systemBackground
        } else {
            return .white
        }
    }

    static var secondaryViewBackground: UIColor {
        if #available(iOS 13.0, *) {
            return .secondarySystemBackground
        } else {
            return UIColor.RGB(242, 242, 242)
        }
    }

    static var darkViewBackground: UIColor {
        return UIColor.RGB(51, 51, 51)
    }

    // MARK: - Cards, lists and forms
    
    static var listItemBackground: UIColor { return .primaryBackground }
    static var listContainerBackground: UIColor { return .secondaryBackground }

    // MARK: Labels, Text Views, etc

    static var text: UIColor {
        if #available(iOS 13.0, *) {
            return .label
        } else {
            return UIColor.RGB(51, 51, 51) // was csdarkergrey51s
        }
    }

    static var secondaryText: UIColor {
        if #available(iOS 13.0, *) {
            return .secondaryLabel
        } else {
            return UIColor.RGB(135, 135, 135) // was csdarkergrey135s
        }
    }

    static var tertiaryText: UIColor {
        if #available(iOS 13.0, *) {
            return .tertiaryLabel
        } else {
            return UIColor.RGB(203, 203, 203) // was csdarkergrey203s
        }
    }

    // MARK: - Borders and Keylines
    
    static var border: UIColor {
        if #available(iOS 13.0, *) {
            return .separator
        } else {
            return UIColor.RGB(214, 214, 214)
        }
    }

    static var separatorLine: UIColor {
        if #available(iOS 13.0, *) {
            return .separator
        } else {
            return UIColor.RGB(221, 221, 221)
        }
    }
    // MARK: - Buttons, icons, etc

    static var standardCallToAction: UIColor {
        return UIColor(named: "standardCallToAction") ?? UIColor.RGB(28, 136, 201) // was cs_carsBlue()
    }

    static var prominentCallToAction: UIColor {
        return UIColor(named: "prominentCallToAction") ?? UIColor.RGB(255, 137, 65) // was cs_orange()
    }
    
    // MARK: - Other Controls

    static var activePageControl: UIColor {
        return UIColor.text
    }

    static var inactivePageControl: UIColor {
        return UIColor.secondaryText
    }

    // MARK: - Other
    
    static var facebookBlue: UIColor {
        return UIColor(named: "facebookBlue") ?? UIColor.RGB(59, 89, 152) // was cs_facebookBlue
    }

    static var googleRed: UIColor {
        return UIColor(named: "googleRed") ?? UIColor.RGB(211, 72, 54) // was cs_googleRed
    }
}