import PrimerSDK

struct PrimerThemeRN: Decodable {
    let colors: ColorThemeRN?
    let darkModeColors: ColorThemeRN?
}

extension PrimerThemeRN {
    func asPrimerTheme() -> PrimerTheme {

        let isDarkMode = UITraitCollection.current.userInterfaceStyle == .dark

        let currentColors = isDarkMode ? darkModeColors : colors

        guard let colors = currentColors else {
            return PrimerTheme()
        }

        let data = PrimerThemeData()
        data.colors = PrimerThemeData.ColorSwatch()

        if let mainColor = colors.text?.uiColor ?? colors.mainColor?.uiColor {
            data.colors.primary = mainColor
            data.colors.dark = mainColor
            data.colors.gray = mainColor
        }
        if let disabledColor = colors.disabled?.uiColor {
            data.colors.lightGray = disabledColor
            data.buttons.main.disabledColor = disabledColor
        }
        if let errorColor = colors.error?.uiColor {
            data.colors.error = errorColor
        }
        if let borderColor = colors.borders?.uiColor {
            data.buttons.main.border.defaultColor = borderColor
            data.input.border.defaultColor = borderColor
        }

        if let backgroundColor = colors.background?.uiColor {
            data.view.backgroundColor = backgroundColor
        }

        return PrimerTheme(with: data)
    }
}

struct ColorThemeRN: Decodable {
    let mainColor: ColorRN? // primary
    let contrastingColor: ColorRN? // ???
    let background: ColorRN? // light
    let text: ColorRN? // primary
    let contrastingText: ColorRN? // ??
    let borders: ColorRN? // ??
    let disabled: ColorRN? // lightGray
    let error: ColorRN? // error
}

extension ColorThemeRN {
    var primerColorTheme: ColorTheme {
        return PrimerDefaultTheme(
            text1: text?.uiColor ?? .black,
            text2: contrastingText?.uiColor ?? .white,
            text3: mainColor?.uiColor ?? .systemBlue,
            secondaryText1: disabled?.uiColor ?? .lightGray,
            main1: background?.uiColor ?? .white,
            main2: disabled?.uiColor ?? .lightGray,
            tint1: mainColor?.uiColor ?? .systemBlue,
            neutral1: disabled?.uiColor ?? .lightGray,
            disabled1: disabled?.uiColor ?? .lightGray,
            error1: error?.uiColor ?? .systemRed,
            success1: mainColor?.uiColor ?? .systemBlue
        )
    }

    @available(iOS 13.0, *)
    var primerDarkModeTheme: ColorTheme {
        return PrimerDefaultTheme(
            text1: text?.uiColor ?? .white,
            text2: contrastingText?.uiColor ?? .white,
            text3: mainColor?.uiColor ?? .systemBlue,
            secondaryText1: disabled?.uiColor ?? .systemGray,
            main1: background?.uiColor ?? .systemGray6,
            main2: disabled?.uiColor ?? .systemGray5,
            tint1: mainColor?.uiColor ?? .systemBlue,
            neutral1: disabled?.uiColor ?? .systemGray3,
            disabled1: disabled?.uiColor ?? .systemGray3,
            error1: mainColor?.uiColor ?? .systemRed,
            success1: mainColor?.uiColor ?? .systemBlue
        )
    }
}

struct ColorRN: Decodable {
    let red: CGFloat
    let green: CGFloat
    let blue: CGFloat
    let alpha: CGFloat
}

extension ColorRN {
    var uiColor: UIColor {
        return UIColor.init(red: red/255, green: green/255, blue: blue/255, alpha: alpha/255)
    }
}