// Swift Usage Example for New Config Functions
// This shows how to use the new RTSDA-compliant config functions in iOS

import Foundation

// WRONG - Old way (violates RTSDA architecture)
/*
private func loadChurchConfig() {
    let configJson = fetchConfigJson() // Gets raw JSON from Rust
    
    // THIS IS BUSINESS LOGIC AND SHOULD BE IN RUST!
    if let configData = configJson.data(using: .utf8),
       let config = try? JSONDecoder().decode(ChurchConfig.self, from: configData) {
        self.churchConfig = config
    } else {
        print("Failed to load church config")
    }
}
*/

// RIGHT - New way (follows RTSDA architecture)
class ChurchConfigManager: ObservableObject {
    @Published var churchName: String = ""
    @Published var contactPhone: String = ""
    @Published var contactEmail: String = ""
    @Published var brandColor: String = ""
    @Published var aboutText: String = ""
    @Published var donationUrl: String = ""
    @Published var churchAddress: String = ""
    @Published var coordinates: [Double] = [0.0, 0.0]
    @Published var websiteUrl: String = ""
    @Published var facebookUrl: String = ""
    @Published var youtubeUrl: String = ""
    @Published var instagramUrl: String = ""
    @Published var missionStatement: String = ""
    
    func loadConfig() {
        // ALL business logic (JSON parsing, error handling, fallbacks) is in Rust
        // Swift just calls Rust functions and gets parsed values directly
        self.churchName = getChurchName()
        self.contactPhone = getContactPhone()
        self.contactEmail = getContactEmail()
        self.brandColor = getBrandColor()
        self.aboutText = getAboutText()
        self.donationUrl = getDonationUrl()
        self.churchAddress = getChurchAddress()
        self.coordinates = getCoordinates()
        self.websiteUrl = getWebsiteUrl()
        self.facebookUrl = getFacebookUrl()
        self.youtubeUrl = getYoutubeUrl()
        self.instagramUrl = getInstagramUrl()
        self.missionStatement = getMissionStatement()
    }
}

// Example SwiftUI View
struct ConfigDisplayView: View {
    @StateObject private var configManager = ChurchConfigManager()
    
    var body: some View {
        VStack(alignment: .leading, spacing: 8) {
            Text(configManager.churchName)
                .font(.title)
                .foregroundColor(Color(hex: configManager.brandColor))
            
            Text(configManager.aboutText)
                .font(.body)
            
            Text("Contact: \(configManager.contactPhone)")
            Text("Email: \(configManager.contactEmail)")
            Text("Address: \(configManager.churchAddress)")
            
            if !configManager.donationUrl.isEmpty {
                Link("Donate", destination: URL(string: configManager.donationUrl)!)
                    .foregroundColor(Color(hex: configManager.brandColor))
            }
        }
        .padding()
        .onAppear {
            configManager.loadConfig()
        }
    }
}

extension Color {
    init(hex: String) {
        let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
        var int: UInt64 = 0
        Scanner(string: hex).scanHexInt64(&int)
        let a, r, g, b: UInt64
        switch hex.count {
        case 3: // RGB (12-bit)
            (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
        case 6: // RGB (24-bit)
            (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
        case 8: // ARGB (32-bit)
            (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
        default:
            (a, r, g, b) = (1, 1, 1, 0)
        }

        self.init(
            .sRGB,
            red: Double(r) / 255,
            green: Double(g) / 255,
            blue:  Double(b) / 255,
            opacity: Double(a) / 255
        )
    }
}

/*
Benefits of this approach:

1. ✅ RTSDA Compliant - ALL business logic in Rust
2. ✅ No JSON parsing in Swift - Rust handles it all
3. ✅ Proper error handling with fallbacks in Rust
4. ✅ Consistent behavior across iOS and Android
5. ✅ Easy to test - just call Rust functions
6. ✅ No model synchronization issues
7. ✅ Automatic fallback values if config fails to load
8. ✅ Cleaner Swift code - just UI logic

Functions available:
- getChurchName() -> String
- getContactPhone() -> String  
- getContactEmail() -> String
- getBrandColor() -> String
- getAboutText() -> String
- getDonationUrl() -> String
- getChurchAddress() -> String
- getCoordinates() -> [Double] // [latitude, longitude]
- getWebsiteUrl() -> String
- getFacebookUrl() -> String
- getYoutubeUrl() -> String
- getInstagramUrl() -> String
- getMissionStatement() -> String
*/