import SwiftUI

struct AppTheme: Identifiable, Equatable {
    let id: String
    let name: String
    let colorScheme: ColorScheme?
    let accent: Color
    let background: Color
    let secondaryBackground: Color
    let primaryText: Color
    let secondaryText: Color

    static func == (lhs: AppTheme, rhs: AppTheme) -> Bool { lhs.id == rhs.id }
}

extension AppTheme {
    static let all: [AppTheme] = [.default, .emacs, .dracula, .oneDark, .monokai, .material, .thankfulEyes]

    static let `default` = AppTheme(
        id: "default",
        name: "Default",
        colorScheme: .light,
        accent: Color(hex: "#006DAF"),
        background: Color(hex: "#FFFFFF"),
        secondaryBackground: Color(hex: "#F0F0F0"),
        primaryText: Color(hex: "#333333"),
        secondaryText: Color(hex: "#9A9FA4")
    )

    static let emacs = AppTheme(
        id: "emacs",
        name: "Emacs",
        colorScheme: .dark,
        accent: Color(hex: "#4ac1f7"),
        background: Color(hex: "#1c1e1f"),
        secondaryBackground: Color(hex: "#252729"),
        primaryText: Color(hex: "#dcdccc"),
        secondaryText: Color(hex: "#7f9f7f")
    )

    static let dracula = AppTheme(
        id: "dracula",
        name: "Dracula",
        colorScheme: .dark,
        accent: Color(hex: "#bd93f9"),
        background: Color(hex: "#282a36"),
        secondaryBackground: Color(hex: "#44475a"),
        primaryText: Color(hex: "#f8f8f2"),
        secondaryText: Color(hex: "#6272a4")
    )

    static let oneDark = AppTheme(
        id: "one_dark",
        name: "One Dark",
        colorScheme: .dark,
        accent: Color(hex: "#61afef"),
        background: Color(hex: "#282c34"),
        secondaryBackground: Color(hex: "#21252b"),
        primaryText: Color(hex: "#abb2bf"),
        secondaryText: Color(hex: "#5c6370")
    )

    static let monokai = AppTheme(
        id: "monokai",
        name: "Monokai",
        colorScheme: .dark,
        accent: Color(hex: "#a6e22e"),
        background: Color(hex: "#272822"),
        secondaryBackground: Color(hex: "#49483e"),
        primaryText: Color(hex: "#f8f8f2"),
        secondaryText: Color(hex: "#75715e")
    )

    static let material = AppTheme(
        id: "material",
        name: "Material",
        colorScheme: .dark,
        accent: Color(hex: "#80cbc4"),
        background: Color(hex: "#263238"),
        secondaryBackground: Color(hex: "#2e3c43"),
        primaryText: Color(hex: "#eeffff"),
        secondaryText: Color(hex: "#546e7a")
    )

    static let thankfulEyes = AppTheme(
        id: "thankful_eyes",
        name: "Thankful Eyes",
        colorScheme: .dark,
        accent: Color(hex: "#a8e1fe"),
        background: Color(hex: "#122b3b"),
        secondaryBackground: Color(hex: "#1c2f3b"),
        primaryText: Color(hex: "#faf6e4"),
        secondaryText: Color(hex: "#6c8b9f")
    )
}

extension Color {
    init(hex: String) {
        let hex = hex.trimmingCharacters(in: .alphanumerics.inverted)
        var value: UInt64 = 0
        Scanner(string: hex).scanHexInt64(&value)
        let r = Double((value >> 16) & 0xff) / 255
        let g = Double((value >> 8) & 0xff) / 255
        let b = Double(value & 0xff) / 255
        self.init(red: r, green: g, blue: b)
    }
}